API stands for Application Programming Interface, and it is an layer of interface that allows programs to interact with each other. An experienced API developer can build complex interactions between applications, making them faster, more reliable, and accurate. Whether you need a second opinion on your existing application or you want to create an entirely new application for your business, an expert API Developer can do the job for you.

An API Developer's job does not stop at developing. They can also work on design and implementation testing, guide through the entire architect process from prototyping to implementation, create custom system integration solution based on the project requirements, and collaborate with other teams to develop systems that meet customer expectations.

When hiring an API Developer through Freelancer.com, rest assured that they are as competent as any hired onsite software engineer.

Here’s some projects our experts have worked on:

  • Building custom interfaces to move large amounts of data efficiently between applications
  • Working with Javascript to allow websites to access external information relating to weather conditions
  • Creating Grafana dashboards for quick and easy visualization of data points
  • Developing scripts to connect external APIs with more heavy-duty platforms like Microsoft Azure
  • Debugging mobile apps involving fishing
  • Integrating AI capabilities into online shops
  • Automating regression tests so developers can work faster and more accurately

No matter what your business needs are in terms of API development, our expert freelancers are ready to take on the challenge and provide support whenever you need it. With expertise in debugging applications and web development, you're guaranteed to find the right developer for your project! So why wait? Post your project today at Freelancers.com and reap the benefits of working with an expert API Developer now!

From 181,189 reviews, clients rate our API Developers 4.86 out of 5 stars.
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    I am urgently seeking an experienced Python expert specialized in data science, in particular large language models and Generated AI. Your task will revolve solely around machine learning modeling. Your responsibilities will include: - Implementing unsupervised machine learning to produce effective anomaly detection models. It's essential that you: - Have significant experience with Python, large language model, and general AI - Hold solid understanding of unsupervised machine learning and anomaly detection - Are able to work independently, as this project is unsuitable for those currently committed to full-time employment. This opportunity will allow you to showcase your expertise and make a significant impact. Reach out to me for more information.

    $305 (Avg Bid)
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    We are looking for an experienced developer to create a web application that will allow users to communicate with existing virtual characters in our catalog in the form of AI chat, as well as create their own by providing detailed prompts similar to ChatGPT. We see integration with the OpenAI API as the primary means of generating dialogues, but we are open to considering alternative options. Most likely, in the future, we will move towards a more specialized solution. We consider the project as an example of what we aim to achieve. Requirements: - Development of standard web application functionality, including a database for storing dialogues and user information, authentication, payment systems (Stripe, PayPal, etc.), catalog search, email notifications, and logging. - The site shou...

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    We are seeking a skilled Data Scientist to join our innovative team on the Irrigation Audit App project, a cutting-edge application designed to revolutionize irrigation management in golf courses. This role focuses on developing advanced algorithms for creating heatmaps and designing API endpoints to support data analysis and visualization. The ideal candidate will possess a strong background in data science, experience with geospatial analysis, and proficiency in API development. Responsibilities: Develop and implement algorithms for calculating Distribution Uniformity (DU) and generating heatmaps based on irrigation data. Design and construct API endpoints for efficient data retrieval, manipulation, and storage, facilitating seamless interaction between the app's frontend and backe...

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    I am on the lookout for a talented freelancer with a deep understanding of Laravel and API integration, specifically with Betsapi. Key project requirements include: - Data synchronization between my Laravel betting script and Betsapi. - Implementing odds display from Betsapi onto my platform. - Enabling event creation features driven by Betsapi data. A standout candidate will streamline this process while preserving the full functionality and integrity of our betting script, and ensure automated live updates from Betsapi. Critical skills and experience: - Proficiency in Laravel - Broad knowledge in API integration - Familiarity with Betsapi or similar odds provider platforms If you have substantial experience integrating APIs into Laravel scripts, especially within betting environm...

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    I am looking for an expert in Fast API training to me online with screen sharing. It is aimed primarily at beginners with a focus on web application development, specifically backend development. Total duration 3-4 hours As a freelancer, you will need: - Expertise in Fast API - A strong understanding of backend development - Experience in delivering training for beginners - Ability to focus teaching on web applications development

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    I'm seeking an experienced developer with a strong background in Laravel to build an API for an existing online doctor platform. This API will include the following features: - User registration and authentication - Connect my platform to online pharmacies I'm not only looking for someone to build the API, but someone who can help me understand what information we'll need from these online pharmacies to successfully integrate their services. Special consideration will be given to freelancers who have prior experience in healthcare and pharmaceutical service integration. SHOWCASE YOUR SKILLS IN: - Laravel - API Development and Integration - Understanding of healthcare or pharmaceutical service integration - Authentication systems (User registration and security) If y...

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    I need to develop a new FHIR (Fast Healthcare Interoperability Resources) bundle that specifically includes 'Patient' resources. With limited information available on this topic, I need someone who can operate and adapt to potential uses for this bundle. While knowledge on specific healthcare information standards isn't required, familiarity with standards like HL7v2, CDAR2 or DICOM would be beneficial. Primary tasks will include: - Developing a fresh FHIR bundle from scratch - Ensuring the bundle includes 'Patient' resources - Adapting the development process as the project goals evolve Ideal candidates should have experience in FHIR related projects, and should be able to work independently while meeting project goals. we have only these much reference about ...

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    I'm searching for a freelancer experienced in PHP and dealing with APIs, particularly the Etsy API. Your task will involve building a PHP application to create Etsy listings. The focus here will be on handmade items, which means an understanding of the crafting and selling of such goods would be beneficial. In creating these listings through the application from a mysql table that will contain all info required, I require the inclusion of product details and images. This means seamless integration with image files is crucial, along with the capacity to input extensive product details. Here's a quick rundown of the skills needed: - Strong expertise in PHP and APIs, especially the Etsy API - Knowledge in dealing with image file integration - Experience or understanding of craft...

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    I'm in need of a developer adept in API integrations, specifically taking messages from waziper via webhook and posting entered data within a Google Sheet. Task requirements include: - Integration of waziper webhook into an application - Extraction of 'Text content' and 'Sender's phone number' from the received message - Successful post of the extracted data to a Google Sheet, with each message creating a new row Ideal candidates would have experience in API integration, webhook setup, and Google Sheets manipulation. Bit of coding background might prove beneficial. I look forward for competent freelancers who can handle this task seamlessly. Format of API below: ://webhook.site/1b25464d6833784f96eef4xxxxxxxxxx&enable=true&instance_id=609ACF283XXXX&a...

    $146 (Avg Bid)
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    I need to develop a new FHIR (Fast Healthcare Interoperability Resources) bundle that specifically includes 'Patient' resources. With limited information available on this topic, I need someone who can operate and adapt to potential uses for this bundle. While knowledge on specific healthcare information standards isn't required, familiarity with standards like HL7v2, CDAR2 or DICOM would be beneficial. Primary tasks will include: - Developing a fresh FHIR bundle from scratch - Ensuring the bundle includes 'Patient' resources - Adapting the development process as the project goals evolve Ideal candidates should have experience in FHIR related projects, and should be able to work independently while meeting project goals. we have only these much reference about ...

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    MESSRS - DO NOT MESSAGE or BID WITHOUT READING EVERY WORD IN PDF BELOW - NO BS CREATE your own personal new account through TOOLS TO BE USED: - Autocomplete API - Name to Domain API SUPPORTED LANGUAGE: Shell, Ruby, Node OR Python INSTRUCTIONS: See Below DELIVERABLE: Three (3) spreadsheet file(s) One (1) Word doc with code and detailed documentation Autocomplete API Tasks 1. List A converted to .xls filed named Output 2. List C for new separate .xls named Output Name to Domain API Tasks 3. List A converted to converted to new .xls file named NO 4. Output A (see above) converted to new .xls file named Output 5. Output C (see above...

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    I need a competent developer to create a chatbot on the Voiceflow platform. This chatbot must be integrated with and Shopify. The main aim of creating this chatbot is to facilitate sellers on these platforms. Key functionalities for the chatbot: 1. Product Recommendation - The chatbot should be able to recommend relevant products to the sellers based on specific criteria and requirements. 2. Order Tracking - It should also have the capability to track orders and provide up-to-date information when inquired. 3. Customer Assistance - Respond to queries and problems faced by the sellers, offering prompt and correct assistance. Ideal Skills: - Experience in Voiceflow, Shoper and Shopify platforms. - Previous experience in building chatbots with product recommendation, order tracking and c...

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    As a client, I am on the hunt for a proficient web developer who can craft an exact replica of bababooki.in. This particular project is centered around e-commerce, thus experience in that field is inevitably important. Ideal Experience and Skills Required: - Extensive experience in developing similar websites - Proficient in e-commerce website development. Application Requirements: To be successful, kindly include samples of past work especially related to similar websites you've developed. Please exclude any graphics design or unrelated work. The main focus here is creating an e-commerce platform similar to bababooki.in. Potential freelancers should note the importance of timely delivery and excellent communication skills for the successful execution of this project.

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    Google Maps API -- 2 4 days left
    VERIFIED

    As the project owner, I am seeking a skilled freelancer API developer with experience in Google Maps API. The programmer will embed Google Maps into our existing platform and develop features including geolocation and direction services. The successful candidate should possess: - Extensive familiarity and hands-on experience with JSON - Previous track record in integrating Google Maps API or similar projects - Can showcase a solid understanding of geolocation and directions services in Google Maps API Please specify your experience with similar projects in your application. We're especially interested in individuals who can develop a robust, user-friendly, and responsive mapping platform.

    $160 (Avg Bid)
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    We are looking for an experienced integration expert to connect Yelp messages with Go High Level (GHL) conversations as we get messages from Google My Business to GHL. Additional Information: - We have a SAAS plan of GHL with API v2 & might i9t can help you. - Include relevant experience in the proposal. If you have the skills to integrate Yelp messages into GHL efficiently, submit your proposal with the approach, timeline, and portfolio. Excited to enhance communication with your expertise! Thank You

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    Description: We are an emerging company in the ecommerce sector looking for an experienced developer to create and configure a customized chatbot using the WhatsApp Business API. This project aims to improve our communication with customers by providing personalized automatic responses and facilitating a more interactive and efficient shopping experience. Responsibilities: Develop and configure a chatbot using the WhatsApp Business API. Create customizable automatic response menus and manage the chatbot's interaction logic. Integrate the chatbot with our ecommerce platform and other necessary systems. Ensure the system's scalability and security.

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    I run School ERP web app and I'm looking to develop an API that will specifically serve the Student App. The API should enable students to: - View assignments and grades - Review exam results - Access and download lecture notes in PDF format These functions should be secured with user login credentials. As my web app is built using Laravel, I'd appreciate it if the API could be developed in a language compatible with Laravel. Ideal candidates for this role possess robust experience in Laravel, API development, and student management systems.

    $169 (Avg Bid)
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    I'm looking for a skilled developer, preferably with experience in working with DocuSign API. The goal is to incorporate specific features into this application including signing documents electronically on our website, creating and managing templates, and checking document status and history. As I am not well-versed in the pros and cons of particular programming languages or frameworks, I am open to the developer's suggestions. A specific design is ready for the application and I will provide more information on this during further discussions. The developer needs to replicate this design accurately into the application. In summary, the main requirements are: - Proficiency with DocuSign API - Ability to create an application around a predefined design - Openness ...

    $37 / hr (Avg Bid)
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    I'm in need of a developer adept in API integrations, specifically taking messages from waziper via webhook and posting entered data within a Google Sheet. Task requirements include: - Integration of waziper webhook into an application - Extraction of 'Text content' and 'Sender's phone number' from the received message - Successful post of the extracted data to a Google Sheet, with each message creating a new row Ideal candidates would have experience in API integration, webhook setup, and Google Sheets manipulation. Bit of coding background might prove beneficial. I look forward for competent freelancers who can handle this task seamlessly. Format of API below: ://webhook.site/1b25464d6833784f96eef4xxxxxxxxxx&enable=true&instance_id=609ACF283XXXX&...

    $27 (Avg Bid)
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    9 bids

    I’m looking for an experienced developer to automate my online store selling physical products. In this project, three crucial features need to be expertly implemented: - Inventory Management: The system needs to monitor our stock closely, alerting us when inventory levels are low. Additionally, it should initiate automatic reordering of stock items running low to ensure consistent supply and customer satisfaction. - Order Tracking: I'd like seamless tracking of all orders, which will enhance customer trust and boost our reputation for reliability. - Payment Gateway Integration: A secure, user-friendly payment gateway needs to be integrated, offering customers varied and convenient payment options. Ideal candidates should be well versed in E-commerce platforms, inventory man...

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    I require an expert in social media automation to create a unique, custom project for me. This system needs to manage actions for an unlimited number of Instagram accounts daily, autonomously handling the following: - Liking and commenting on posts. - Following and unfollowing users. - Sending automated Direct Messages. This platform is expected to be robust, effective, and user-friendly. Due to the scope of work, proficiency in programming, social media algorithms, Instagram API, and automation is necessary. Familiarity with pre-existing automation tools like Jarvee, FollowLiker, and Instazood is a plus, though this project requires a bespoke solution. The final deliverable should be a fully functional, easy to use system. The right freelancer will demonstrate a proven track re...

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    I need a proficient WordPress developer to help create a page on my website. The main purpose of this page is to serve as a template. Essential requirements include: - Developing a WordPress page template. - Integrating a search feature that allows users to search by categories. - API connection. Ideal applicants for this project are those with notable WordPress development knowledge, experience in creating search features, and solid understanding of API integration. Proven track-record on similar projects will certainly place you in a strong position for consideration.

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    I'm seeking an experienced and knowledgeable Senior Systems Engineer with a strong background in system analysis, design, implementation, testing, maintenance, and troubleshooting. Key Responsibilities: - Analyze and design robust systems - Implement and test system designs - Perform system maintenance and troubleshooting Required Skills and Experience: - Proficiency in Java, Python - Familiarity with GoHighLevel, Zapier, and APIs - 5+ years of professional experience in Systems Engineering Your extensive experience and strong technical skills will be crucial in assuring the reliability and efficiency of our systems. I look forward to your bids.

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    ALL DETAILS ARE IN PDF FILE THAT WHAT COMPANY EXACTLY WANTS

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    I need professional guidance on creating custom modules on a self-hosted ERPNext 15. Specifically, I need a tutorial tailored towards the Data Analytics and CRM sections of the software. The custom module should incorporate the following functionalities: - Data visualization - Customer segmentation - Contact communication history For seamless operation, the module should be able to integrate data from the following sources: - ERPNext platform's database - External APIs - CSV/Excel files The ideal freelancer for this task should have a robust understanding of ERPNext software and have experience in module customization. Data analytics and CRM specialization as well as proficiency in integrating diverse data sources will be a significant asset. The ability to clearly explain and inst...

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    Some addition to the project below: The api is changed regularly, if I come back to you for addaptions that must be made, what will the yearly update costs be? To get an idea, you can check using url how many times and how api is changed. --------------------------- I'm looking for an experienced developer to integrate my store with WooCommerce. Specifically: * Product synchronization, ensuring all products in my store (over 100 items) are mirrored on my WooCommerce site. * Inventory synchronization, so changes on reflect automatically in WooCommerce, and vice versa. * Order synchronization, to keep both platforms up-to-date whenever a purchase is made. * There is one WooCommerce webshop and two accounts, both accounts need to be synced to the WooCommerce webshop. Ideal Ski...

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    Hello guys. What we want is that fields from website (see image) to appear on a fluxstore app. We have 2 fields already added but they were not working properly. Also IBAN field is missing from app. Basically what we want is same fields from website checkout () to also appear on app(check app- ) If any questions please ask. Also we are searching for long term collaboration.

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    Description: I am in search of a skilled Python developer to develop a script that can retrieve historical data for gold prices from a specified API (), perform simple mathematical analysis, generate graphs to visualise the data, and export the graphs in PNG format. Skills Required: - Proficiency in Python programming - Experience working with APIs - Knowledge of data manipulation and storage - Familiarity with graphing libraries (e.g., Matplotlib, Plotly, whichever is most suitable) - Ability to implement mathematical equations for data analysis - Experience in exporting graphs to PNG format Technical Requirements: - Develop a Python script to connect to the API, retrieve historical gold price data, and store it in a structured format - Implement graphing functionality to visualise the ...

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    I'm looking for a skilled developer capable of building a church-specific mobile application using SWIFT. The app will have several key features: - Sermon streaming: The app should be able to send direct the audio from Macbook(audio input source) for translation (GCP) and send back the text-to-speech (GCP) to Zoom as Audio-in. Ideally, you will have a deep understanding of integrating Google Cloud APIs, including Speech-to-text, AutoML translation and text-to-speech. I will provide all required APIs for development. Strong experience in SWIFT programming is a must for this project. Your experience in building similar apps or projects will be a great advantage.

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    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

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    Hola Muhammad Umair A., tu perfil llamó mi atención y me gustaría ofrecerte mi proyecto. Podemos conversar sobre los detalles por chat.

    $18 / hr (Avg Bid)
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    Nous sommes une école de formation spécialisée dans le management nous voulons créer un concept ou les apprenants viennent apprendre le management en faisant des cookies. Les stagiaires vont en premier lieu passer leur commande de cookies et mentionner la table à laquelle ils sont assis, ensuite ils enfileront leurs tabliers de cuisine et iront les fabriquer eux même. Selon leur nombre ils seront divisés en deux équipes ou pas, par exemple s’ils sont 6 au total on ouvrira qu’une seule cuisine, s’ils sont 12 on ouvrira deux cuisines et dans ce cas la il y’aura une battle entre les 2 équipes. Il nous faut un système pour récupérer les commandes puis générer les ordres de f...

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    Busco a un desarrollador amibicioso, que sea capaz de construir una aplicacion multiplataforma. Sin entrar en detalles específicos, nuestro proyecto busca combinar funcionalidades útiles con un diseño intuitivo y accesible, creando una plataforma que padres de todo el mundo querrán usar. Somos un startup emergente enfocado en centralizar (revolucionar) el ámbito de la paternidad a través de la tecnología. Estamos en búsqueda de desarrolladores de aplicaciones móviles con experiencia en plataformas multiplataforma. Nuestra idea es que usted, nos ayude a crear una plataforma minimamente usable, para comprobar el modelo de negocio, por lo que no seria un trabajo de creacion de una app perfecta y completisima. Que buscamos sobre ...

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