Java jobs

...compliance flags and basic audit logs. • Remote actions (lock, wipe, reboot) executed securely over the air. • Scalable back-end with REST APIs so we can integrate ticketing and reporting later. Tech expectations – Android Enterprise APIs (latest versions) for Work-Managed devices. – Web console built in React, Angular or similar modern framework, backed by a well-documented REST/GraphQL layer (Java, Kotlin, Node, Go—your choice, just explain). – Containerised deployment (Docker/Kubernetes) ready for installation on our on-prem or AWS environment. – Source code, build scripts and a clear installation/runbook are part of the hand-off. Acceptance criteria 1. Smartphones and tablets enrol successfully and receive an initial pol...

I have a small Java Swing application where several JCheckBox components refuse to stay checked when clicked. No exceptions are thrown; they simply pop back to an unchecked state immediately. I need someone to dive into the relevant UI and event-handling code, identify why the state isn’t persisting, and deliver a clean fix that works across Windows, macOS, and Linux builds of the app. You’ll receive the current source (Maven project) plus a short video showing the behaviour. Please return: • corrected code or patch files • a brief explanation of the root cause • confirmation tests or steps I can run to prove the boxes now retain their state If you’re comfortable debugging Swing listeners, model binding, or custom renderers, this should be a ...

I need a small, self-contained resource pack for Minecraft Java Edition that will be used on a Fabric server. Very important: This project must NOT use OptiFine, Custom Item Textures (CIT), or any client-side mods. I want this to work using vanilla mechanics only. The goal is to replace the standard carved pumpkin model with several alternate 3D fantasy-style models (for example: a long wizard’s hat, a trophy helm, and other creative variants). Players should be able to switch between these models simply by renaming the carved pumpkin in an anvil. No OptiFine, no CIT Resewn, and no external mod dependencies should be required. The solution must rely purely on vanilla-compatible resource pack features. This pack is focused and lightweight. I only need: Custom textures Cus...

I’m ready to replace the patchwork of spreadsheets and standalone tools we currently use with a single, fully-integrated hospital management solution that works for both my main hospital and our satellite clinics. Please build a system that includes t...trails, role-based access control and data export to standard formats (CSV/PDF) are must-haves. On delivery I will need: • Production-ready builds for all three platforms • Source code with clear comments • A brief deployment guide and user manual • One round of post-launch bug fixes within a reasonable timeframe Feel free to recommend the most suitable tech stack—whether that’s .NET, Java, PHP, React, Flutter or any other combination—as long as it meets the goals above and...

Multi-Vendor E-commerce Marketplace (Amazon-style MVP) — Angular + Spring Boot + AWS Project Overview I need a developer (or small team) to build a multi-vendor e-commerce marketplace similar to Amazon (MVP version). The platform will support Buyers, Sellers, and Admin roles with separate dashboards. Tech Stack Requirements Frontend: Angular (responsive web app) Backend: Java Spring Boot Database: MySQL or PostgreSQL API: REST APIs Auth: JWT Authentication + role-based access (Buyer/Seller/Admin) Payments: Stripe or Razorpay Image Storage: AWS S3 (or similar) Deployment (AWS required): Frontend: S3 + CloudFront Backend: Elastic Beanstalk (or ECS Fargate if you prefer) Database: RDS (private, not public) Core Features (MVP) 1) Buyer (Customer) Features Authentica...

My multi-app food-delivery platform (React Native front ends, Java & Spring Boot backend) already runs smoothly for customers, restaurants, delivery partners and admins. I now need a secure hand-over confirmation flow: 1. When the delivery partner clicks on GET DELIVERY LOCATION, the Customer app must auto-generate a single-use OTP/Pin. 2. The code stays valid for exactly 30 minutes (time-based expiry) and the customer can trigger a fresh code immediately if something goes wrong. 3. The Delivery Partner app prompts for this code on arrival; on successful match the backend records “delivered” and releases any pending status updates to the Restaurant and Admin apps. SECOND PART: After confirmation for order from Restaurant app, all devices of DELIVERY Partner get...

I am looking for a senior Python developer to build an automated migration API that upgrades legacy Java 8 projects to Java 17. The core logic should leverage Google Gemini (via Vertex AI or Google AI SDK) to analyze, refactor, and modernize codebases. prefer VIA Vertex AI

...notifications and emails ahead of due dates, at custom intervals we define. Although I am open to adding payment gateways or history tracking later, this first release only needs the reminder workflow working flawlessly. I expect a clean, modern UI, role-based access for admins, teachers and parents, and secure, well-documented code. Feel free to use the frameworks you trust most for Android (Kotlin, Java or even Flutter as long as the final build targets Android), and any stable stack for the web dashboard. Deliverables: • Android APK + source code • Web admin panel with hosting instructions • Structured database schema and dump • Brief user manual and developer setup guide If you have built something similar, share screenshots or a short demo link...

I have a sizeable Java-style .properties file—roughly 1,100 English words—that needs to be rendered into standard German while preserving every bit of its structure. All comment lines appear in green and must remain in English; the only content you should touch is the white text that follows each “=”. A few technical points matter: • Back-slash line breaks () must stay exactly where they are so my application still parses the file correctly. • Keys, punctuation, and spacing on either side of “=” cannot shift. • The finished file must come back to me as a clean .properties file ready to drop into the codebase—no extra encoding issues or changed end-of-line characters. If you are comfortable handling resource bundl...

***Project Background*** We are building a financial data aggregation and risk control verification system. We need to retrieve account balances, UPI IDs, and transaction history from major Indian UPI wallet accounts for multi-account fund monitoring and transaction status verificati...similar projects? ***Clarification*** Each wallet is an independent module/deliverable. The scope is limited to OTP login (mobile + OTP) + data extraction (balance, UPI ID, transaction history) No backend systems, databases, or admin dashboards are required. The deliverable is standalone executable code that outputs standardized JSON and meets the acceptance criteria. ***Skills Required*** PHP, Java, Python, Android, Software Architecture, Node.js, Data Extraction, Automation, API Development, Data ...

I’m putting together a quick proof-of-concept that talks directly to Tuya’s Cloud API and controls a Wi-Fi smart lock. The PoC only needs to run from the command line; no UI, no bells or whistles—just clean Java code that logs every request and response in plain-text so I can see exactly what’s happening under the hood. Here’s what the program must do, in sequence: • Authenticate with Tuya Cloud using my API Key credentials. • Create a temporary password on a designated lock that is valid for exactly one hour (now → now + 1 h). • Immediately fetch and print the list of existing temporary passwords so I can confirm the new one is present. • Delete that same temporary password and verify its removal. I can supply Tuy...

I need a dedicated software developer to build a polished Android mobile application from the ground up. I already have the core concept and basic feature list sketched out; what I’m missing is an expert who can translate that vision into clean, efficient Kotlin / Java code, craft an intuitive Material-compliant UI, and guide the app right through to a signed Play-Store-ready build. Here’s what success looks like to me: • A fully functional Android app that runs smoothly on current OS versions and common screen sizes. • Well-structured source code pushed to a private Git repository with clear commit history and inline comments. • Lightweight technical documentation (set-up steps, build instructions, and an API overview if external services are used)...

...Zygisk + LSPosed Goal: Force a USB UVC external camera to behave as the ONLY usable system camera. Requirements: Any app requesting a camera must open ONLY the external USB UVC camera. Internal physical cameras must be unusable or invisible. No ROM building. No vendor modifications. No HAL or external provider changes. Runtime-only solution. Implementation must be done via: LSPosed module (Java hooks) Native Zygisk module (C/C++) Delivered as a Magisk module ZIP REQUIRED FINAL DELIVERABLES To be eligible for selection, submission MUST include: Working LSPosed module (APK) Working Magisk module ZIP including native Zygisk (.so arm64) Source code for both modules Clear installation instructions Demo video showing: Camera apps only open UVC Internal cameras are...

I have a freshly-created React Native project that refuses to build on my Windows development machine. Gradle fails during the Android build step, so the app never reaches the Android Emulator. I’m using Android Studio “Otter” alongside the standard Android Emulator and current Java JDK. Here’s what I need from you: • Inspect my current environment remotely (screen-share or a quick pair-programming session). • Identify and resolve the Gradle errors that block the build. • Verify that the project compiles, installs, and launches in the Android Emulator without warnings. Help me with apk generation. • Leave me with clear, step-by-step notes so I can reproduce the setup if I reinstall or move machines. A background in React Native CLI ...

...changes inside the UI. I2S handling can follow later, but rock-steady I2C comes first. You may choose any practical route—GPIO lines available on an Android SBC, a USB-to-I2C bridge, or another proven method—so long as it runs on a stock Android build. I can supply the amplifier’s data-sheet and register map as soon as the project starts. Deliverables • Full Android Studio project (Kotlin or Java) with clean, well-commented source • Working APK that finds the amplifier at its I2C address, reads/writes at least one test register, and visually reflects the change • Remote key handling that reliably adjusts an on-screen EQ parameter • Brief setup document covering hardware hookup, build steps, and pointers for adding future I2S support...

...design or balancing work is required — implementation only. Technical Requirements: Minecraft Fabric 1.20.1, Proven experience with the Origins mod framework Comfortable implementing: Passive and active powers, Conditions, Entity actions and modifiers, Clean, well-structured, reusable implementation Deliverables: One fully functional custom Origin for Fabric 1.20.1, All source files (JSON / Java if applicable), Brief documentation explaining: File structure, Any non-obvious logic, How values can be adjusted later Future Work - If this first Origin meets expectations, I plan to commission: Many additional Origins (20+ total), Ongoing implementation work as the mod expands, This is intended to be a long-term working relationship. Ideal Freelancer: Experience mod...

We are building a web-based technical practice platform and are looking for a strong frontend developer (2–4 years experience) to help build a high-performance student dashboard and integrate a professional in-browser code editor. Scope: • Build a fast, responsive frontend using (React) + TypeScript • Integrate Monaco Editor with C++ and Java support • Connect to an existing Judge0 code execution API • Build a simple admin dashboard for performance tracking • Implement clean state management for multi-step user flows Tech Stack: • , TypeScript, Tailwind CSS, Monaco Editor, Supabase (Auth/DB), REST APIs What We’re Looking For: • Strong React architecture skills • Experience integrating third-party APIs • Performance-focused...

In java based architecture applications, we have used Backend Dropwizard framework (Jetty) instead of it, we have to replace it with Backend Spring Boot framework Also, in this application, we have to replace foundationDb database with Apache Cassandra instead of it. migration plan (Dropwizard → Spring Boot + FoundationDB → Cassandra + Redis + RabbitMQ ) WebSocket layer logic in the Messenger application. now it is used instead → Elixir → (gRPC Request over UDS) → Spring Boot (Client → Phoenix → gRPC → Spring → Cassandra) 1) Load Balancer HAProxy Spring Boot skeleton + Cassandra setup + data migration scripts 2) Replace Dropwizard routes/controllers → Spring Boot REST endpoints, integrate Redis/RabbitMQ 3) Elixir/Phoenix WebSocke...

...within that the priority feature is real-time performance metrics that update without a perceptible lag. From there, you’ll wire in Monaco (with C++ and Java language services) and stream submissions to Judge0 so students see compile-and-run results instantly. Once the learner experience is rock-solid, we’ll extend the same design language to a TPO Dashboard that lets placement-office staff monitor cohorts and manage interview-style sessions; state persistence for those long sessions is critical. Deliverables I’m expecting: • High-performance frontend hooked to Supabase auth/DB • Monaco editor embedded, themed, and configured for C++ & Java • Live Judge0 integration for compile/run feedback • Student dashboard with zero-lag...

I need a skilled Minecraft Java Edition admin to build and configure a 20-slot server dedicated to custom water-bucket challenges. Scope • Design a linear set of drop arenas that start simple and ramp up to nearly impossible, aligning with my “Hard to Almost Impossible” preference. • Configure game rules, world settings, and checkpoints so each stage feels progressively tougher without glitches or unintended shortcuts. • Set up precise permissions: I stay in Creative mode at all times, while every other player joins in Survival by default and can be switched to Spectator when eliminated. • Install and tweak any lightweight plugins or command-block scripts needed for smoother resets, timed attempts, and leaderboard tracking. • Walk me...

I’m migrating an older Java backend—built on legacy Spring and Hibernate—into a fresh Spring Boot 3 project so the stack is fully modern and future-proof. The focus is code refactoring: untangling dated patterns, replacing XML configuration with annotations, adopting Spring Data JPA, and cleaning up any deprecated API usage. No new features are needed right now; the goal is pure code modernization. You’ll receive a private Git repo containing the current application and a lightweight skeleton for the new one. Work incrementally, push frequent commits, and raise pull requests so the migration stays transparent and reviewable. GitHub Actions is already wired, so every PR should keep the build green. Deliverables • A runnable Spring Boot 3.x application t...

...management, Java, database administration, and cloud services. Project Deliverables Server Deployment: Hybrid database approach Distributed Cluster We must separate: Edge Layer (Ingress + WebSocket) Application Layer (Spring Boot Core) Stateful Data Layer (Cassandra, PostgreSQL, Redis) Media + Search + Observability WebRTC Stack • Infrastructure: Are you planning to deploy on a our server • Version: need the latest official Signal Server (Java-based) • Customization : rebrand the app or simply run a private instance Configuration & Customization: Set up config .yml for production Optional branding or private instance configuration ________________________________________ Core System Requirements The official Server code is Java application re...

...function is a clear, intuitive snack-selection menu. The flow is simple: users open the app, browse categories or search directly, tap an item, and add it to a lightweight cart. At this stage I am not including in-app payments or review screens, so your effort can stay focused on perfecting the menu experience, item imagery, and quick navigation. Key points to cover • Native Android build (Kotlin or Java—whichever you are faster with) • Simple, modern UI that fits Material 3 guidelines • Category filter, search bar, and product detail pop-ups with image, price, and short description • Local data storage or a small Firebase/SQLite back-end so items can be updated without a new APK push • Clean, well-commented code and an APK for testing S...

I have an existing Java Swing frame that lists data in a JTable. I’d like you to extend that frame (no full refactor) so it keeps the first three legacy columns exactly as they are and adds two new checkbox columns: one for single-select, one for multi-select. Behaviour to build • Load: merge the current GET call with a specific stored procedure I will supply, then set the two new checkbox flags as the rows arrive. • Filters: the small header text fields already present must filter with strict AND logic; results should affect only the rows currently visible in the table. A separate global search box should apply the same AND logic across all visible columns. • Header checkboxes: when a user clicks the checkbox in either new column’s header, toggle t...

I need a Java developer to wire my existing trading platform directly into Interactive Brokers’ Trader Workstation (TWS) so I can operate both Individual and Business accounts from the same codebase. The goal is a production-ready bridge that logs in, streams data, and routes orders with the reliability expected of live trading. The freelancer will integrate Interactive Brokers (IBKR) TWS/Gateway API into the Mansa Bentley trading platform, enabling: Market data ingestion (equities, options, futures) Order execution (market, limit, stop) Account & portfolio management Config‑driven orchestration (YAML/JSON) FastAPI endpoints for all IBKR functions GitHub‑based project management, CI/CD, and documentation The integration must be modular, production‑ready, and fully ...

I’m ready to turn my store concept into a fully-functional Android application. The goal is a clean, intuitive e-commerce experience that lets customers browse products, add items to a cart, check out securely, and track their orders from their phones. Scope of work • Design and develop a native Android app (Java or Kotlin) with a modern material UI that reflects my brand. • Core features: product catalogue, search & filters, product detail pages, user registration / login, shopping cart, multiple payment gateways, order history, push notifications, and basic analytics. • Simple admin back-end or integration with an existing platform (Shopify, WooCommerce, or a lightweight custom API) so I can manage inventory and view orders. • Deliver tested ...

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I'm looking for a skilled programmer to help me with my assignment across Python, Java, and C++. The focus is on learning concepts rather than completing a project or solving specific problems. Ideal Skills and Experience: - Proficiency in Python, Java, and C++ - Strong teaching and communication skills - Experience with academic programming assignments - Patience and ability to explain complex concepts clearly Please provide a brief overview of your teaching approach and relevant experience.

...compliance flags and basic audit logs. • Remote actions (lock, wipe, reboot) executed securely over the air. • Scalable back-end with REST APIs so we can integrate ticketing and reporting later. Tech expectations – Android Enterprise APIs (latest versions) for Work-Managed devices. – Web console built in React, Angular or similar modern framework, backed by a well-documented REST/GraphQL layer (Java, Kotlin, Node, Go—your choice, just explain). – Containerised deployment (Docker/Kubernetes) ready for installation on our on-prem or AWS environment. – Source code, build scripts and a clear installation/runbook are part of the hand-off. Acceptance criteria 1. Smartphones and tablets enrol successfully and receive an initial pol...

...email/password, biometric, social sign-in or any modern alternative that fits the current Google Play guidelines. I will provide the live APK and a short screen-capture showing how it is used inside my business so you can understand the logic, layouts and data flow. Your job is to reproduce that functionality, modernise the UI with Material components, ensure the codebase is future-proof (Kotlin preferred, Java acceptable), and deliver a build that runs smoothly from Android 8 through Android 14. Deliverables • Complete Android Studio project with clean, well-commented code • Working debug APK and release-signed AAB ready for Google Play • Integrated modules for the five features listed above • Basic documentation explaining project structure, librar...

I need a small, self-contained service that can ask Google Play Integrity for a fresh device token whenever my backend re...with Google, and return the token in a secure, well-formed JSON response. • The endpoint must scale for burst traffic but a single-instance Docker image is fine to start. • Clear README covering setup, required Google Cloud credentials, and a short curl example are part of the delivery. • Any language is welcome as long as it is mainstream and has solid Google client-library support (Kotlin, Java, Node.js, Python, Go all acceptable). Acceptance I will spin up the container with my own service account, hit the endpoint, and verify I get a valid, fresh token for a new test device. If the token verifies with Google Play Integrity checker, t...

I need an experienced Android developer to turn my concept for a Utility/Tools application into a polished, ready-to-publish APK. What I’m after • A clean, well-structured Android codebase written in Kotlin or Java. • An intuitive UI that follows current Material Design guidelines. • Core utility features implemented exactly to spec (I will share wireframes and user stories once we start). • Basic analytics, crash reporting, and in-app update handling. • Clear build instructions so I can compile the project locally. I’ll handle all artwork and copy; I just need you to integrate the assets and ensure everything runs smoothly on recent Android versions. Regular progress updates through Git or a similar repo are important to me, and I&...

I have an existing Java Swing frame that lists data in a JTable. I’d like you to extend that frame (no full refactor) so it keeps the first three legacy columns exactly as they are and adds two new checkbox columns: one for single-select, one for multi-select. Behaviour to build • Load: merge the current GET call with a specific stored procedure I will supply, then set the two new checkbox flags as the rows arrive. • Filters: the small header text fields already present must filter with strict AND logic; results should affect only the rows currently visible in the table. A separate global search box should apply the same AND logic across all visible columns. • Header checkboxes: when a user clicks the checkbox in either new column’s header, toggle t...

I need a Java developer who already knows their way around the Toshiba TCxSky ACE POS platform. The immediate goal is integration with other systems so the store data can move cleanly in and out of the POS. Depending on how the rollout unfolds, this may touch Inventory management, Payment gateways, or even CRM systems, but for the first milestone I want the core integration framework in place and demonstrably stable. Please show me past work that proves you have handled similar Java-based integrations—especially anything involving retail, POS APIs, or middleware such as XML, REST, or SOAP services. Screenshots, short code snippets, or links to live environments are all helpful. If you have tackled TCxSky or older Toshiba/IBM POS stacks before, highlight that up front. ...

I ne...core back-end services—authentication, real-time feed, media storage and push notifications—can run on Firebase or another cloud stack you’re comfortable with, provided it scales easily. Please integrate standard privacy tools (blocking, reporting, content moderation hooks) so the app is ready for public release. Deliverables • Production-ready Android Studio project with well-commented Kotlin or Java code • Secure database / cloud setup scripts • Signed APK & Play Store–ready bundle • Brief hand-off document explaining build steps, API keys placement and how to extend features I’ll review by installing the APK on a physical device and walking through every feature listed above. If everything works smoothly and the...

I ne...core back-end services—authentication, real-time feed, media storage and push notifications—can run on Firebase or another cloud stack you’re comfortable with, provided it scales easily. Please integrate standard privacy tools (blocking, reporting, content moderation hooks) so the app is ready for public release. Deliverables • Production-ready Android Studio project with well-commented Kotlin or Java code • Secure database / cloud setup scripts • Signed APK & Play Store–ready bundle • Brief hand-off document explaining build steps, API keys placement and how to extend features I’ll review by installing the APK on a physical device and walking through every feature listed above. If everything works smoothly and the...

I have a sizeable Java-style .properties file—roughly 1,100 English words—that needs to be rendered into standard German while preserving every bit of its structure. All comment lines appear in green and must remain in English; the only content you should touch is the white text that follows each “=”. A few technical points matter: • Back-slash line breaks () must stay exactly where they are so my application still parses the file correctly. • Keys, punctuation, and spacing on either side of “=” cannot shift. • The finished file must come back to me as a clean .properties file ready to drop into the codebase—no extra encoding issues or changed end-of-line characters. If you are comfortable handling resource bundl...

...source code with clear comments highlighting every modification. 2. A debug-signed APK so the operations team can run regression tests. 3. A short change log outlining the classes touched and the rationale behind each change. Experience working directly with Camera2, Jetpack libraries, and the Android NFC API will help you move quickly; familiarity with Kotlin is a bonus (the project is mixed Java/Kotlin). I’ll be available for quick turnaround on questions and will test each milestone as soon as you deliver the build....

I will give you a working Android application that I own the rights to and need it rebuilt from the ground up. All screens, flows, wording, colours, animations and behind-the-scenes logic must match the reference exactly, so a user moving between the two apps notices no difference. You are free to use Kotlin or Java in Android Studio as long as the finished code is clean, well-commented and ready for future updates. If the original app relies on a simple server or local database, mirror that structure; if it calls external APIs, point the new build to the same endpoints. I will supply any keys or assets you need. Deliverables • Complete Android Studio project with source code • Release-ready APK (and, if possible, an App Bundle) • Brief build/run instructions so...

I am ready to move from concept to a full architectural blueprint for QR code “Sanctuary,” a 100 % local-first mobile application that guides users from a state of striving to one of restoration through a voice-activated “Digital Altar.” I need an architect who is equally at home with native mobile stacks (Swift/Objective-C, Kotlin/Java, C++), low-level WebGL/Canvas rendering, Core ML-based on-device models, and rigorous edge-computing privacy patterns. Core experience I expect you to bring • Voice-activated interactions that feel immediate and natural, processed entirely on-device—no cloud calls, ever. • Custom procedural animations and visuals, driven by parametric or ML-assisted logic, that reinforce the altar metaphor and the user&rsq...

I have an existing Java Swing frame that lists data in a JTable. I’d like you to extend that frame (no full refactor) so it keeps the first three legacy columns exactly as they are and adds two new checkbox columns: one for single-select, one for multi-select. Behaviour to build • Load: merge the current GET call with a specific stored procedure I will supply, then set the two new checkbox flags as the rows arrive. • Filters: the small header text fields already present must filter with strict AND logic; results should affect only the rows currently visible in the table. A separate global search box should apply the same AND logic across all visible columns. • Header checkboxes: when a user clicks the checkbox in either new column’s header, toggle t...

I’m expanding a fully cloud-native Java micro-services platform and need a seasoned developer to work alongside me on building brand-new features. The stack is Java (Spring Boot, React ), containerised with Docker and orchestrated on Kubernetes, with everything running in the cloud. Your focus will be twofold: 1. User-interface enhancements – i have idea , so you’ll translate those visuals into responsive, maintainable front-end code that plugs neatly into our micro-front-end architecture. 2. Back-end service extensions – you’ll design and code new micro-services or extend existing ones, exposing RESTful endpoints and integrating them into our event-driven ecosystem. We’ll collaborate through Git, conduct code reviews, and push c...

...and fast. • The interface should follow current Material guidelines so the listing looks polished on Google Play. • No cloud backup, compression, or other extras are needed at this stage; keeping the scope tight is a priority. I’ll be publishing the finished APK myself through my Google Play Console, so what I need from you is: 1. Complete Android Studio project with well-commented Kotlin or Java code (Kotlin preferred). 2. Signed release APK/AAB ready for upload. 3. Simple text or markdown file containing build steps, key features, and any required permissions for the store listing. 4. App icon (adaptive) and a couple of sample screenshots so I can pass initial review without scrambling for graphics. Acceptance criteria • Transfers a 100 MB fi...

I am setting up a new service and require an experienced Java Backend Developer to design and develop the server-side application from scratch. The technology stack will be based on Java and Spring Boot, following a clean and modular architecture that can later evolve into independent microservices. Core Responsibilities Develop well-structured REST APIs supporting CRUD operations and domain-specific workflows. Design and manage MySQL database schemas using Spring Data JPA, including optimized tables, indexing, and migrations for performance and data integrity. Implement secure API access using Basic Authentication, while maintaining flexibility for future migration to OAuth2 or JWT-based authentication. Implement robust validation, centralized exception handling, and detai...

I need an Android-only e-commerce application whose first release concentrates on a smooth shopping-cart flow and a secure, hassle-free checkout. Think of it as the purchasing core of a larger store: products are already stored in a backend API I provide, so your mission is to turn browsing items into confirmed orders with as few taps as possible. Key requirements • Kotlin (preferred) or Java inside Android Studio • Add-to-cart, quantity edits, promo-code handling, and real-time basket total updates • Multiple payment gateways (Stripe is mandatory; PayPal is a nice-to-have) with tokenised, PCI-compliant processing • Order confirmation screen + push/email receipt trigger • Clean MVVM architecture, Retrofit for API calls, and Firebase Crashlytics fo...

I'm looking for an experienced Java developer to create a desktop application that serves as a user interface tool (RFID checkout system with face ID). The application needs to support both Windows and Linux operating systems. Key Requirements: - Development in Java - Support for Windows and Linux - Functionality as a user interface tool Ideal Skills and Experience: - Proficiency in Java and desktop application development - Experience with cross-platform compatibility, especially on Windows and Linux - Strong understanding of user interface design and usability principles

... Performance, stability, and security come first: the APK must run confidently on every current Android phone and handle sensitive data with proper encryption, secure networking, and up-to-date libraries. Pair that with a clean, contemporary Material 3 interface so users feel at home from the first screen. Deliverables • Full Android Studio project with 6readable, well-commented Kotlin or Java code • Modular architecture that keeps business logic separated from UI • Balance view, transfer workflow, biometric authentication, and basic settings screen ready for production testing • In-app error handling, loading states, and empty-state designs • Signed release build + installation guide • Two rounds of minor revisions after the first te...

...worked with authentication system, hashing, Real time Database, Live Location Integration and other enterprise level features. 4. 2 SEO engineers. 5. 5 professionals Marketing Expert, Sales, Branding and Administration. 6. 2 Project Manager. 7. QA/Testing Team 8. DevOps Engineer 9. 10 Android Studio Engineers having great expertise in any one of the language from Flutter, React Native, Kotlin or Java. 10. 10 Content writers. 11. 5 Wordpress Developer. 12. 10 Video Editors, having on hand experience with Adobe Premiere Pro and any industry leading tool. 14. 20 AI engineers having great knowledge in Python. We are a starting a company together, where you don't need to invest financially, You just need to leverage your skills for the company. We'll raise projects ...

Hello, I am looking for a developer or development team to build a marketplace application similar to Kleinanzeigen, but targeted for the Arab market. Important: I require two fully native versions: - Android Native (Kotlin or Java) - iOS Native (Swift) Cross-platform frameworks such as Flutter or React Native are not required. App Features: 1. User registration (Email or Phone number) 2. Login / Logout 3. Post ads (Images, Description, Price, Category, Location) 4. Edit and delete ads 5. Advanced search functionality 6. Filtering by price and location 7. In-app chat between buyer and seller 8. Push notifications 9. User rating system 10. Featured / Promoted ads option 11. Admin panel to manage users and listings Technical Requirements: 1. Professional backend (Firebase or deve...

I’m ready to roll out an Android application called “Uang.” I’ve tagged the project type as “Dana,” so every feature should revolve around handling money and funds. Scope • Develop a clean, lightweight Android app (Java or Kotlin) that lets users record, view, and edit monetary entries such as income, expenses, and transfers. • Store data locally with secure practices and structure the code so it can be extended to cloud storage later. • Provide attractive, intuitive screens for the main ledger, entry creation, and simple analytics (e.g., totals by category). • Supply well-commented source code, a signed APK for testing, and concise setup documentation. I’ll review past examples of finance, wallet, or budgeting wo...