The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
Debugging is the process of finding and resolving errors or defects in a system, application, or computer code. It is an essential tool to ensure the development process runs smoothly and efficiently. A Debugging Expert has many years of experience working with debugging, troubleshooting, and software testing. They use a variety of tools and techniques to identify errors. It can help optimize your system, find any underlying issues, and enhance your overall user experience.
The expertise that our Debugging Expert can offer you is invaluable:
- Help debug existing applications and making them more efficient
- Troubleshoot issues within applications
- Resolve technical problems with code optimization
- Identify any potential security vulnerabilities
- Identify and resolve potential bug issues
Here's some projects that our Debugging Experts made real:
At Freelancer.com our expert Debugging Expert has consistently delivered excellent results to many satisfied clients. Our dedication to proactively finding potential problems is why so many companies choose us. If you're looking for a reliable professional to streamline your applications or fix errors within them then invite you to post your project and hire a Debugging Expert on Freelancer.com today!
From 36,388 reviews, clients rate our Debugging Experts 4.9 out of 5 stars.Debugging is the process of finding and resolving errors or defects in a system, application, or computer code. It is an essential tool to ensure the development process runs smoothly and efficiently. A Debugging Expert has many years of experience working with debugging, troubleshooting, and software testing. They use a variety of tools and techniques to identify errors. It can help optimize your system, find any underlying issues, and enhance your overall user experience.
The expertise that our Debugging Expert can offer you is invaluable:
- Help debug existing applications and making them more efficient
- Troubleshoot issues within applications
- Resolve technical problems with code optimization
- Identify any potential security vulnerabilities
- Identify and resolve potential bug issues
Here's some projects that our Debugging Experts made real:
At Freelancer.com our expert Debugging Expert has consistently delivered excellent results to many satisfied clients. Our dedication to proactively finding potential problems is why so many companies choose us. If you're looking for a reliable professional to streamline your applications or fix errors within them then invite you to post your project and hire a Debugging Expert on Freelancer.com today!
From 36,388 reviews, clients rate our Debugging Experts 4.9 out of 5 stars.My site is suffering from a technical error: nobody can log in. Each attempt immediately returns an “Account locked” message, even with correct credentials. There are no broken links or visible JavaScript errors on the page—just this persistent authentication failure. I need you to trace the root cause in the existing codebase and server configuration, repair it, and confirm that normal login flows work again. Feel free to inspect session handling, database queries, password-hash checks, or any rate-limit logic that might be triggering the lockout. Deliverable: updated code or configuration plus a short report documenting what you changed and proof (screenshots or screencast) that a standard user can sign in successfully.
I have a working SMPP client in Python, but ever since our traffic moved to India’s DLT region the messages never leave the bind. The vendor confirms that “DLT parameters are not added,” so nothing is accepted and no delivery receipts arrive. What I need you to do • Inspect the existing Python code (built around smpplib) and pinpoint why Sender ID, Entity ID, Template ID and the additional PE Id are not being inserted in the submit_sm PDU. • Add those parameters in the exact TAG-LEN-VALUE format required by the operator, then test end-to-end until “message sent” and a valid DLR are both confirmed. • Supply the fixed script with concise notes showing which blocks were changed so I can audit the patch quickly. You must already be comfo...
I need assistance getting Squareline Studio to work with Arduino IDE on a Waveshare 7-inch board. My libraries are messed up, and I'm encountering compilation errors due to missing libraries and what not. Set up my first own project so I can work on it in Square line studio and transfer to Arduio IDE. Key Tasks: - Using Windows 10. Done! - Install Square line Studio 1.6.1. Done! - Maybe want to use Eez studio instead since it is free. It is also installed already. - Install Arduino IDE 2.3. Done! - Use correct folder for IDE .ino files. - Setup Square line Studio and export project to correct folder. - Compile a sample project successfully. Waveshare board to use: ESP32-S3-Touch-LCD-7B with touch. Ideal Skills & Experience: - Experience with Arduino IDE and Waveshare boards...
My current Python automation script runs, but the results are wrong—so the core problem is logical errors rather than anything that fails at compile time. I need an experienced Python developer to trace the faulty logic, correct it, and then put the working script into production. You will start by reviewing the code and any helper modules, replicate the bug I am seeing, and explain why the output is off. Once the logic is patched, I want the script fully tested under the same data sets that exposed the issue, plus a few edge-case inputs to ensure robustness. When the fixes are confirmed, the final step is deployment to the live environment. The project sits on a small Ubuntu VPS with Python 3.10, virtualenv and Git already in place, so you can push the clean code straight to the s...
I have several sites with Stripe and PayPal already plugged in, yet I’m not completely sure the setup is rock-solid. I’m looking for a payments specialist to sanity-check everything and prove that money flows exactly as it should. Here’s what I need you to do: • Examine each WordPress installation or laravel etc, plugin, and gateway setting to confirm API keys, webhooks, currency, tax, and notification settings are all correct for both Stripe and PayPal. • Run test transactions for every scenario I offer—single product sales plus the membership options of Monthly subscriptions and One-time payments. Make sure charges go through, memberships activate, renewal/cancellation logic fires, and emails or receipts reach the customer. • Document every step. I...
I need a compact Python script that can open a web page, fill out every field in a standard registration form, and submit it until a success confirmation appears. I will provide sample data in CSV or JSON; the script should read each row, register the account, and log the result so I can see which entries passed or failed. Selenium or Playwright is fine—whichever you prefer—as long as the bot behaves like a real user. It should: • launch in headless mode by default with an easy flag to switch to visible mode for debugging • wait for dynamic elements, pick up any hidden tokens, and respect client-side validation • store cookies between steps when the site issues multi-page sign-ups • offer simple hooks so a captcha-solver can be added later if needed ...
I work full-time on a live Guidewire ClaimCenter implementation and regularly handle production incidents—everything from mis-routed documents to integration hiccups. While I can usually patch issues, I want to move beyond quick fixes and truly master the platform. My immediate focus is on Coding best practices in Gosu. I often find myself guessing when it comes to structuring classes, optimizing performance, or leveraging the framework’s more powerful constructs. To sharpen my skills, I need long-term, hands-on mentoring that covers: • Advanced features and techniques in Gosu (refactoring pattern code, metaprogramming, performance tuning, and testability) During our sessions you’ll walk me through real tickets, explain why a particular solution works in ClaimCent...
Need someone to finish a complete job because who im working with decide to dont answer and left me in the last steps
We have had several companies working in the past 9 years and there are many tags and now misconfigured, we need someone who can set it up for our google ads and analytics so the right and correct figures must work. I’m seeing a frustrating data mismatch between what actually happens on the site and what Google Analytics reports. Tags are already deployed in Google Tag Manager, yet the numbers in GA simply don’t line up with real-world activity. Here’s what I need from you: • Audit my existing GTM container and Google Analytics property to pinpoint why the tracking is off. • Correct or replace any misconfigured tags, triggers, or variables so every pageview and event is captured cleanly. • Validate the fix by comparing on-site actions with live GA rep...
# WhatsApp Business API & Meta Integration Specialist (Freelance / Ongoing Support) ## Project Overview We are looking for an experienced freelancer to help us set up, troubleshoot, and manage our WhatsApp Business API integration using the Meta Developer platform. We already have a WhatsApp Business number in India and want to run WhatsApp campaigns directly through n8n. We do not want to rely on third-party campaign tools as our long-term solution, although we may temporarily use tools such as Interakt if required. Our immediate challenge is related to the Meta Developer platform setup, including access tokens, API configuration, permissions, and WhatsApp Business API connectivity. ## What We Need ### Immediate Objectives * Diagnose and resolve issues with Meta Developer Platf...
I have a functioning machine-learning application with a solid core, yet bugs keep surfacing and the overall accuracy still falls short of what I need. My goal is to push every component of the model toward peak performance while stamping out recurring issues. Here’s what I need from you: • Audit the current codebase to identify logic flaws, data-handling mistakes, and any silent failures that degrade predictions. • Refine model architecture and hyper-parameters so we see a measurable boost in accuracy on our validation set. • Strengthen the training pipeline with better data preprocessing, feature engineering, and reproducibility practices. • Implement automated tests and robust error logging so new bugs are caught early. • Document the improvements...
Load project to Android Studio and handle exceptions for lead developer. - report developed exceptions to lead developer - see his responses and fix them
We are looking for a senior Android developer to urgently investigate and resolve a bug in our Android application. This is not a role for someone who needs heavy supervision, trial-and-error guidance, or long onboarding. We need a developer who can quickly understand an existing codebase, identify the root cause, produce a reliable fix, and communicate clearly throughout the process. The ideal candidate is experienced, practical, fast, and comfortable using modern AI tools to accelerate debugging, code review, test generation, and implementation, while still applying strong engineering judgment. We are not looking for someone who blindly copies AI-generated code. We want someone who knows how to use AI responsibly to deliver faster and more reliable results.
My PHP application fails whenever it tries to send an email. The problem is limited to sending—receiving works elsewhere—and the code relies on PHPMailer configured to run through Sendmail rather than SMTP. I need someone to trace the root cause, correct the configuration or code, and verify that messages leave the server reliably without throwing errors or disappearing into the queue. You will have SSH or panel access (read-only first, write when we’re confident) so you can inspect log files, PHPMailer settings, and the Sendmail configuration. When you are done, I want to hit the existing “Send” button and see the message land in my test inbox with the correct headers and no warnings in the server logs. Deliverables: • Updated PHPMailer or Sendmail set...
We are developing a security product for AIX that is currently causing kernel crashes. We need an experienced engineer to work with our development team to identify and resolve the root cause. We'd like to start with a short discovery call to confirm fit, then move quickly. Ideal experience: Debugging AIX kernel extensions Analyzing AIX system dumps AIX kernel internals
Title: Fix Google Play Billing + RevenueCat Subscription Issue (React Native / Expo) Project Description: I have a React Native (Expo) Android app integrated with RevenueCat and Google Play Billing. Current issue: - Paywall opens successfully. - Subscription prices are NOT visible. - Purchase restore fails. - Error shown: - Store Connection Error - Could not connect to Google Play Billing - Credentials issue during restore Current setup: - RevenueCat products configured - RevenueCat offerings configured - Google Play credentials connected - Subscriptions and Base Plans are active - App installed from Google Play testing track - Closed/Internal testing enabled Suspected areas: - Google Play Billing integration - RevenueCat SDK configuration - Android permissions - Expo / React...
So what is happening is i have made this rendergraph system with transient and external images/buffer system, what is happeining is everything works, but when i try to uncomment to begine dynamic rendering in the mainzpass, the entire program freezes and throws no errors even with more messages enabled in the debug renderer, im not sure why this is happening or if its a driver issue or something but i need help fixing this. First check when you uncomment the vkBegin/EndRenderingInfo in actually gives you an error becasue if it doesnt then it might be a driver issue, but if it does then you will have to fix it. the job is considered complete when the freezes no longer happen and it runs smoothly The project is made entirely in Vulkan and C++ and it already has a cmake setup that i have t...
I need an experienced developer to resolve launch-blocking issues in my village-focused delivery app. Here's what needs attention: 1. Repeating Groups: Resolve the issue of empty cells showing—ensure data populates correctly without blank boxes. 2. Store Images: Fix the problem of JPG/PNG images not displaying; trace and resolve rendering issues. 3. Location Feature: Develop a proper location system to allow customers to set delivery addresses accurately. 4. Delivery Boy Workflow: Implement order flows—notifications for delivery boys, order acceptance, pick-up from stores, and final delivery to customers. 5. UI Revamp: Redesign the interface for a professional Zomato/Blinkit-style look—focus on clean, responsive, mobile-friendly design for rural networks....
I have a Python-based script that has been packaged into an .exe and currently pushes data out using an ADPU-style transmission. I now need that same codebase to send and receive using ATR transmission instead. The core of the job is to modify the existing data-transmission format—no protocol swap or major architectural overhaul, just a precise refactor so every outbound and inbound message complies with ATR rules while the surrounding logic remains intact. You will receive: • The full script source that was frozen into the .exe • Sample ADPU request/response pairs and the matching ATR specification I must follow Deliverables I expect: • Updated Python code with clear comments highlighting every line touched • A rebuilt .exe that runs on Windows 1...
Replit Specialist / AI Product Builder for Early-Stage Startup About the Project I’m a non-technical founder building an AI-powered platform focused on self-understanding, human connection, and relationship intelligence. The product is already being built in Replit and has a functioning foundation. I’m looking for a technically strong collaborator who can help accelerate development, solve technical challenges, and turn ideas into working features. This is not a traditional agency handoff project. I’m looking for someone who enjoys working directly with founders, solving problems collaboratively, and helping shape an early-stage product. ⸻ Who This Role Is For You may be a great fit if you: * Enjoy startup environments * Like working closely with founders * Are c...
I’m looking for an expert Laravel + developer who has strong experience with PayPal Advanced Checkout, especially Apple Pay through PayPal. My website already has PayPal, cards, and Google Pay working. The issue is specifically with the PayPal Apple Pay integration. I need someone to properly diagnose the current implementation, find the exact reason Apple Pay payments are not being captured/detected correctly by PayPal, and fix it fully. The goal is simple: Apple Pay must work 100% correctly through PayPal, the same way Google Pay and card payments work on my website. What I need: Review my existing Laravel backend and frontend code Diagnose the PayPal Apple Pay flow completely Fix Apple Pay payment creation, authorization, confirmation, and capture Make sure payments are actua...
I need help now is a focused, advanced walkthrough on cracking ’s deobfuscation layer. What I want from you is a set of clear, well-structured video tutorials ( in person or offline)that show—step by step—how to unpack an assembly protected by , peel away its control-flow, string and metadata tricks, and rebuild readable, workable source. I’m not looking for surface-level theory; I need you to demonstrate real-world tooling in action, explain why each choice matters, and discuss subtle counter-measures deploys. Please base the recordings on tools you trust in your own workflow—whether that’s a customised de4dot fork, dnSpy, ILSpy plugins, or any purpose-built scripts you’ve crafted. Provide the protected sample binaries you work on so I can re...
Flutter Calling App (Customer Listener) Tech Stack Flutter Mobile App Node.js Backend ZEGOCLOUD Voice/Video Calling SDK Firebase Cloud Messaging (if implemented) Issue Description The app allows Customers to call Listeners using ZEGOCLOUD. The call works when both users are actively using the app. However, when the Listener app is in the background or the device is locked, incoming calls are not being received consistently. Expected Behaviour Listener receives incoming call when app is open. Listener receives incoming call when app is minimized. Listener receives incoming call when phone screen is locked. Listener can accept/reject directly from incoming call screen. Call notifications should work reliably on Android and iOS. Areas to Investigate Flutter Side Zego Call Invitation Service i...
I have the full Knight Online 2383 client source running on DirectX 9 and need it modernised to DirectX 11. The server is stable—only the rendering layer must change—so your work will focus on the graphics pipeline, shader set-up, device management and all HLSL migrations. What must remain untouched is critical: • User Interface (UI) elements • Game mechanics • In-game animations On the optimisation side I’m targeting: • Noticeable frame-rate gains, especially in crowded zones • Lower overall memory footprint • Faster initial and zone-change load times You will be working in C++ with the existing codebase; all shaders are available and simply need rewriting or refactoring for DX11. I expect clean, well-commented commits so ...
I'm looking for a technical expert to help with WorkPlace Tech version 5.9.3 for a commercial property. Key Tasks: - Troubleshooting and debugging issues - Software installation and setup - Updates and maintenance - Guidance on configuration for specific tasks Ideal Skills and Experience: - Experience with WorkPlace Tech or similar software - Strong troubleshooting and debugging skills - Familiarity with software installation and maintenance - Ability to provide clear guidance and support
I’m ready to take my technical abilities to the next level and I’m looking for a seasoned mentor who can guide me through a structured learning path. Whether we focus on sharpening my coding practices, deepening my understanding of specific frameworks, or mastering efficient debugging techniques, I’m open to the most effective approach you recommend. Please show me examples of past work that highlight how you have successfully helped others level up technically—case studies, before-and-after codebases, or any measurable results will all help me see the impact you’ve made. I’m not in a rush, so we can develop a schedule that fits us both; consistency and real progress matter more to me than speed. If you enjoy walking someone through practical proje...
Freelancer Project Post We are looking for a developer who is strong in both Replit and GitHub and has experience connecting workflows between the two platforms. We currently have a dashboard that needs to communicate properly between GitHub and Replit. The dashboard is designed to make updates, edits, and adjustments, then push those changes back through GitHub and into Replit so they can be published live to the website. We already have the core system in place, but there are a few bugs and workflow issues that need to be cleaned up. We need someone who can review the current setup, identify what is not working correctly, and help make the process more stable and reliable. The ideal freelancer should have experience with: Replit development and deployment GitHub repositories, commit...
I have a running application with a growing list of development tasks, and the immediate priority is back-end bug fixing. The issues are already documented; I simply need an experienced developer to: • Review the existing ticket list and reproduce each back-end bug • Patch the code, keeping current architecture and coding standards intact • Write or update unit tests to confirm the fix • Push changes through our Git workflow and provide a concise change log The front-end and database layers are stable for now, so your focus remains squarely on server-side logic, APIs, and any middleware that might be involved. You should be comfortable reading someone else’s code, tracing logs, and debugging in a staging environment before we merge to production. I’...
I run on WordPress + WooCommerce and I’m seeing two recurring problems: • Products sometimes refuse to render on first load. A manual refresh or navigating to another page makes them appear, so something in the query, cache, or JS is failing intermittently. • On mobile the main menu disappears; visitors can’t reach any category links. I’ll spin up a full staging clone for you so the live rankings stay untouched. Your job is to trace the root causes, apply clean fixes, and push the solution back to me for review before we deploy to production. Deliverables 1. Stable product grid that loads every time, without needing a refresh. 2. Fully responsive top menu that’s visible and usable on all common mobile breakpoints. 3. Confirmation that product...
I’m building a tiny monitoring node around an ATTiny85 that has only four external components: a single LED, an NTC thermistor, a Hall-effect sensor and a piezo buzzer. I need clean, memory-efficient Arduino-style C/C++ code that: • Samples the thermistor, converts the reading to temperature and classifies it into three adjustable ranges. • Drives the lone LED so the user can tell at a glance which range we’re in (for instance OFF below the first threshold, slow blink in the middle, fast blink above the second threshold—but I’m open to any pattern that is easy to recognise). • Activates the buzzer whenever the temperature crosses the high-temperature limit and keeps it on until the reading falls back below that limit. • Reads and debounces...
I run Telegram inside the MEmu Play Android emulator and I’m completely stuck at the login screen. The confirmation code never reaches my other registered device, the SMS fallback tries to bill me and then fails. I need someone who truly understands Telegram’s authentication flow, Android emulation quirks, and network/SMS routing to make the sign-in work right away. Here’s what I expect: • A step-by-step fix (or patched APK/settings) that lets Telegram running in MEmu Play receive the code normally—no phantom fees, no endless wait. • Clear explanation of every change so I can reproduce the solution on other machines. • Quick turnaround: I need this resolved ASAP. If you’ve troubleshot Telegram or similar OTP issues inside tools like MEm...
Location: New Delhi Employment Type: Full-Time (On site) Department: R&D / Hardware Engineering Compensation: ₹4.30 LPA – ₹6.45LPA About Us We are an early-stage R&D startup developing safety-critical electronic systems and equipment for India's power, railway, and industrial infrastructure. We are a lean, high-ownership team where engineers directly shape products, processes, and the company's technical direction. Our systems are designed to operate reliably in the harshest environments and under the strictest regulatory scrutiny. Role Overview We are looking for a Hardware Engineer with strong expertise in core hardware technologies to lead hardware development. The candidate must be skilled in PCB design and have a solid understanding of hardware systems,...
I’ve built a village-focused delivery platform on Bubble for the Indian market and need an experienced Bubble developer to iron out several launch-blocking issues within the next 15–20 days. Here’s what I need from you: • Repeating groups – some rows show up as blank; those empty cells should simply disappear, not sit there as placeholders. • Product images – the store’s product photos are uploaded but never render in either list or detail views; trace the break and restore them. • Location services – boost the accuracy of the user’s current location and make the location search bar smarter so rural addresses resolve quickly. • Delivery-boy workflow – connect order assignment, live status tracking and proof-o...
My existing VB.NET project is behaving unpredictably: it sometimes crashes on startup and, even after it loads, other crashes appear at random. I need these bugs isolated and fixed so the application runs reliably every time it is launched and during normal use. You will receive the full Visual Studio solution and a short video showing the crashes in action. I have not added any custom logging yet, so incorporating meaningful exception handling or a lightweight logging mechanism is welcome if it helps trace the faults quickly. Deliverables • Corrected source code with clear comments on the changes • A brief summary explaining what caused each crash and how you resolved it • Simple reproducibility steps that confirm the issues no longer occur Please use standard VB...
I have a PIC-based controller receiving Modbus RTU traffic and I need to pull meaningful, human-readable information out of those frames. The transport layer is already running and CRC checks are in place; what is missing is a compact, well-structured decoder that can sit inside my existing project and translate function codes, addresses, and payloads into variables the rest of the firmware can use. Your job is to write and supply code that runs on a PIC (XC8 / MPLAB X tool-chain) and: • Parses incoming Modbus RTU frames in real time. • Supports at minimum function codes 03, 04, 06 and 16, with a clean way to extend to others. • Exposes the decoded data through a simple API or callback so my application layer can consume it immediately. • Handles error responses...
I’ve built a fully-featured travel-planner and the front end is looking great, but before I press “submit” I want an experienced set of eyes on the back-end logic. Your job is to comb through the entire server-side code, isolate and resolve any functional bugs, optimize performance, and make sure every endpoint behaves exactly as it should under real-world load. Once the codebase is watertight, I’d like you to guide me through the final iOS App Store submission process—provisioning profiles, TestFlight builds, App Store Connect metadata and the actual push to review—so the release sails through Apple’s approval on the first try. You’ll have direct access to the repository and time with me to walk through existing architecture, run automated ...
We are seeking Appian Developers with 2–4 years of foundational experience to support application enhancements, bug fixes, and feature development. The role involves developing Appian interfaces and workflows, assisting with feature enhancements and bug resolution, and working closely with senior developers and architects to ensure smooth delivery of enterprise applications. Candidates will also participate in sprint activities, provide status updates, and support testing and deployment efforts. Applicants should have basic to intermediate Appian development skills, a good understanding of SAIL and process models, strong problem-solving and debugging abilities, and a willingness to learn and adapt within an Agile environment. This is a 3-month contract, extendable up to 6 months, w...
We are seeking Appian Developers with 4–6 years of hands-on experience in Appian applications, integrations, and workflow automation. The role involves developing Appian applications using SAIL and process models, implementing integrations through APIs and plug-ins, participating in sprint development activities, and ensuring adherence to Appian coding standards and best practices. Developers will also be responsible for debugging and resolving application issues, supporting testing and deployment activities, and collaborating within Agile teams to deliver high-quality enterprise solutions. Candidates should have strong Appian development experience, expertise in SAIL and process modeling, familiarity with API integrations, and solid debugging and analytical skills. This is a 3-mon...
Estamos construyendo una plataforma de gestión de perfiles de navegación multi-sesión orientada a profesionales de marketing digital, QA, investigación web y automatización. El proyecto se divide en dos capas independientes: • Panel de control basado en Electron (equipo independiente, ya en desarrollo) • Motor de navegador basado en Chromium (ESTE PUESTO) Buscamos exclusivamente ingenieros para la capa del motor Chromium. No se postule si es desarrollador de Electron o frontend. CONTEXTO DEL PROYECTO El motor Chromium debe funcionar como componente controlado dentro de nuestro ecosistema. Recibe configuración desde nuestra API de backend y el panel de control, y ejecuta sesiones de navegación aisladas con parámetros de en...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
Learn how to find and work with a top-rated Google Chrome Developer for your project today!
Learn how to find and work with a skilled Geolocation Developer for your project. Tips and tricks to ensure successful collaboration.