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 189,744 reviews, clients rate our API Developers 4.86 out of 5 stars.
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    38 jobs found, pricing in NZD

    I'm seeking a well-versed expert in the eBay API and platform to offer a personalized training to myself (a beginner). I'm already in the eBay Dev program, so learning how to get a key is not needed. • Delivery Method: The training should be provided through one-on-one virtual sessions. There is opportunity for bigger jobs once this one is complete. • Objective: My main objective is to understand eBay API implementation within the platform as I aim to build a data analysis tool. • Areas of Focus: I am particularly interested in learning about making API calls, handling response data, and debugging and error handling. Hence, hands-on practical examples alongside theory will be extremely beneficial. I am a beginner at API calling and Bubble coding in general....

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    I'm looking for a talented developer with profound knowledge in WhatsApp API integration. Specifically, the successful candidate will be capable of developing software that will: - Receive messages from WhatsApp and store them in flat files on local drive e.g. -receive .... each new message will be stored with a date/time stamp and contact number e.g. ... content is saved as TXT file and attachments stored in original format JPG, PNG etc. - Using a Command Line instruction, the API will send messages to the WhatsApp user. e.g. -send -number 01234567890 ...xxx extension could be HTML TXT JPG PNG To be considered for this project: - You must demonstrate st...

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    I'm in need of an experienced Zoho CRM API expert who can help me integrate my Zoho CRM with a specific Electronic Medical Records (EMR) system. Key Tasks: - Develop a seamless integration between the two systems. Ideal Candidate: -Must possess ample experience and skills in using Zoho CRM API and understand how it interacts with external systems. -Previous experience with EMR systems would be advantageous. - Should ensure the integrated system effectively automates the medical record keeping process while maintaining accuracy and data integrity. Please include evidence of your Zoho CRM API skills and any relevant EMR integration in your proposal. This will be crucial in helping me select the right candidate.

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    Seeking a Python Developer for data extraction from an unofficial Instagram API, processing JSON files, and saving data as CSV. The role involves creating a script for fetching and organizing data based on user inputs: Username, Hashtag, Location. Requires precision and Python proficiency. Responsibilities: FRONT END: Implement a simple windows command line user-input menu: 1. Username 2. Hashtag 3. Location. BACK END: Make api calls to retrieve user details, followers, followings, posts, hashtags, highlights, stories, hashtags, comments, tags and locations PLEASE NOTE: I am looking for a script that will take a username or a location or a hashtag and then get all of the possible data (who was at the location, what posts tagged it, who commented on those posts, who was tagged in the ...

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    Greetings to all. I am looking for an expert Python developer with experience in trading financial robots to convert a script for Iqoption (LUA) in Python and implement it as a strategy, into a functional binary trading robot based on the converted script. Important: I already have the API that connects and works with the IqOption platform. Key components in this project: - Binary trading strategy: The main strategy is to maximize profits. The strategy must be designed with this objective, autonomously making quick decisions that maximize benefits. - Constant Operation: The bot must have the ability to operate 24 hours a day, taking advantage of potential opportunities at every moment in the market. Preferred Skills and Experience: - Mastery of LUA and Python programming. - Familiarity...

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    there is a github resp called i would like to add a function so that the user first need to select subscription plan before he can reach the endpoint create/copilot write me and i will give you better details

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    Abusive Content Reporting App 5 days left
    VERIFIED

    I am in need of an app developer to build an app which foils abusive videos on both TikTok and Facebook of my clients. This app is envisioned to increase the safety of online communities by making it easier to report harmful content in order to block vanish those videos. Here are the specific functionalities the app should include: 1. **User Account Creation for Reporting:** The app should not only anonymize reporting but also facilitate user account creation, so users can track and manage their reports efficiently. It could be another way if you have better idea. 2. **Block Video and Account:** The main aim of the app is to report and block offensive videos, as well as the accounts posting such content. Ideal freelancers for this project would have: - Prior experience in app develop...

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    I am seeking the development of a robust performance management system capable of serving large organizations of more than 100 employees. The focus is on creating an efficient and data-driven tool to streamline performance assessment within my company. Key Functionalities Needed: - Employee Goal Setting and Tracking: The system should provide an easy-to-use interface for employees to set, monitor, and achieve their personal and team objectives. - Performance Reviews and Feedback: A feature allowing for routine performance appraisals, as well as the ability to deliver real-time feedback, is desired. - Performance Analytics and Reporting: The system must deliver insightful and actionable analytics that can measure and monitor staff performance trends over time. - Role-Specific Access: ...

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    SportsPress Pro API is not supported by SportsPress on the basis it uses the WP API. The challenge is there is limited documentation for how to call the API to create Statistics. SportsPress have advised to seek a WP developer to get this to work. I have a current solution that takes data from multiple sources and is able to create Seasons, Leagues, Teams and Players but is unable to create a statistic for a Player. The ask is to create a working Postman Collection or documentation that shows/explains how to create a new statistic for a Player in SportsPress or update an existing statistic. Access to a configured environment is available using WP Engine and LocalWP.

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    With the essential aim of enhancing efficiency in trading operations, I am sourcing for an expert to create an Interactive Brokers API. Key features this API should incorporate include: - Real-time Market Data: Conveying fluctuating market conditions in an instantaneous and accurate manner is paramount. - Trade Execution: The API must be programmed to carry out trades based on predetermined conditions. - Order Management: Effective, reliable and easy to manipulate order management tools are necessary. All the above-outlined features ought to be developed using Python, given it's the preferential programming language due to its simpleness, efficiency, and compatibility with statistical analysis. Furthermore, this API integration should operate as a standalone application; thus, i...

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    I am in need of a skilled developer to create an Astrix plugin called CallGenerator. The purpose of this plugin is to facilitate effortless outbound calls from a predetermined pool of numbers. As a programmer with a keen understanding of Astrix & API integrations, you'll be expected to pull off an integration with an Astrix server. To make the initiative successful you would need to: - Implement a system that picks numbers randomly from selected pools upon each instance of call initiation. - Create a versatile call scheduling functionality. This should have the capability to schedule one-time calls, repeating calls, and limit calls to explicitly specified hours. - Create a system for managing the number pools - Develop a detailed log for call details - Record the calls for log -...

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    Looking for ONDC API programmer who can help us with our Ecommerce Platform. That person just have to guide me though the development. More details can be discussed once offer accepted.

    $266 (Avg Bid)
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    SportsPress Pro API is not supported by SportsPress on the basis it uses the WP API. The challenge is there is limited documentation for how to call the API to create Statistics. SportsPress have advised to seek a WP developer to get this to work. I have a current solution that takes data from multiple sources and is able to create Seasons, Leagues, Teams and Players but is unable to create a statistic for a Player. The ask is to create a working Postman Collection or documentation that shows/explains how to create a new statistic for a Player in SportsPress or update an existing statistic. Access to a configured environment is available using WP Engine and LocalWP.

    $277 (Avg Bid)
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    We are looking for full-stack developers/Senior Mobile Software Engineers for various projects we get assigned to us. If you are interested in joining and working on different projects from time to time (mostly together with different people in different companies) these projects duration from 1 to 6-8 months. It doesn't matter what specifically you are experts in, but everyone is welcome because there is safe work in most things. To proceed with the hiring process, we kindly request that you submit your updated resume along with any additional information that you believe would support your application. This may include, but is not limited to, professional references, a portfolio of your work, or a brief cover letter detailing your interest in the position and how your qualifications...

    $33 / hr (Avg Bid)
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    I require a professional web developer with extensive API integration experience. For this project, we'll leverage the LinkedIn API to dynamically retrieve specific user data, such as CVs and job descriptions, to display on the website. Skills and Experiences: - Proficient in API Integration, particularly data retrieval - Familiarity with LinkedIn's API and its capabilities - Experience in handling and displaying retrieved user data on a website - Demonstrates security measures and best practices when dealing with user data - Strong understanding of the potential legal and ethical issues surrounding the use of LinkedIn data This is a unique project that requires a sophisticated understanding of both website development and data retrieval from an external source, namely Linked...

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    I'm seeking an experienced Laravel PHP developer to bring critical functions to life in my project. The right freelancer will have a demonstrable track record with the following: - Developing a User Authentication System. - Performing Data Migration tasks. - API Development, specifically shipping API integration. Good understanding of best practices and a results-driven, detail-oriented mindset will be essential for success in this position. Although no specific design requirements are stated, your ability to create clean, uncluttered, and efficient code is a must. If you're comfortable with these requirements and enthusiastic about this project, I look forward to seeing your bid.

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    hello I need an expert, not someone who wants to waste my time Integrate Postman with Automate Enterprise Fortra I repeat and refer to someone who has already experienced this

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    I need to integrate my knowledge base to the sendpulse IA chatbot through API so that the questions answered through AI are according to the information from my clinic. Once done, I need access to the database to be able to update information whenever required.

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    I'm in need of an expert proficient in Python and JavaScript to assist with data integration and automation processes in QuickBooks through its API. Key tasks will include: - Implementing data integration between various systems and QuickBooks - Streamlining automation processes to improve efficiency The overall aim is to maximize data accuracy. The ideal freelancer would have extensive experience working with QuickBooks API, specifically in data integration and automation processes. Hands-on experience with Python and JavaScript is a must. Your expertise will greatly help streamline our accounting process and ensure accuracy in our financial data.

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    developper for ALPHABOT 1 day left
    VERIFIED

    i need a dev to build a bot for alphabot task and restriction

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    I am in need of a seasoned IT professional to enable real-time updates from Wetravel to Monday.com. My main focus is on: - Integrating Itinerary Changes - Booking Details - Payment Information The integration should specifically target these data fields and ensure that they sync in real-time. Experts in Wetravel and with a keen eye for detail will be best equipped for this task. I am pretty sure that your expertise will make this integration seamless and effective. Let's do this!

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    I'm seeking a highly experienced developer who can integrate eBay's API into our e-commerce platform. Although we haven't quite settled on whether Shopify or WooCommerce will be our marketplace, we're leaning towards one of these popular choices. We are also open to integrating the ebay API into a blank page for purpose of validation. The integration should primarily provide historical pricing for products searched by users. Our goal is to have a user search for a specific product, and be able to see a graph/chart showing historical pricing info of sale price and date over the last 12M. Ideal candidate should have: - Proven experience in similar projects. - An understanding of both Shopify and WooCommerce platforms. - Familiarity with eBay's API. - Ability to cre...

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    I am looking for a skilled programmer with experience in algo trading using Python - preferably with experience with crypto exchange API. I already have a specific strategy in mind, so I would like someone who can work with me to implement it. Ideal skills for this job include proficiency in Python and experience in API trading. I am looking for a programmer who can work with me on a long term basis with support. Details can be discussed.

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    Core PHP Bug Fixes Needed 1 day left
    VERIFIED

    I am seeking an experienced PHP developer with an eye for detail to fix bugs in my Core PHP project. - Specific Task: The focus of this task will be catching and eliminating bugs impacting my project's overall performance. While the exact nature and functionalities that these bugs affect are unspecified, a careful and comprehensive approach is essential. - Ideal Skills: Proficiency in Core PHP is a requirement, along with solid problem-solving skills. Experience with debugging and fixing a variety of bugs will come in handy. By ensuring the smooth operation of my project, you'll contribute towards a better user experience and improved performance.

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    I'm seeking an experienced API developer to overhaul and expand the Airbnb integration within our booking software. I'm aiming to: - Increase the speed of data synchronisation. - Improve error handling measures. - Expand data fields captured in bookings. - Upgrade from Limited to Full Sync. Ideally, additional details beyond basic booking information need to be synchronised. This includes, but is not limited to, guest reviews, host details, and property ratings. The candidate should have a strong background in API development, preferably with experience in Airbnb API, booking systems, and data synchronisation optimisation techniques. A knack for robust error-proof coding is essential. Proficiency in data management with experience in synchronising large datasets for ...

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    Help needed with jakartaEE 1 day left
    VERIFIED

    Im building an API with jakartaEE, but I keep getting errors. I'm looking for a senior API developer to help me solve it.

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    API Connection 1 day left
    VERIFIED

    I would like to automatically send the availability, prices, minimum stay, and, if possible, a custom link with parameters such as arrival and departure dates to Google Hotel Finder. I think the Google Price API can be used for this. Is that correct? Attached is a PDF with the documentation of the interface where the information can be retrieved. PHP 8.1 is installed on the server. the script should run by cronjob. Composer is not available.

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    I am looking for a professional to Create an API to connect my Wordpress/Woocommerce with Epsilon Smart Invoice Software. I need the connection to be able to have a two-way connection including Uploading, Editing, Removing Products, Getting and Sending orders. Documentation of Epsilon Smart is available here in Greek:

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    I'm interested in developing my store on the Salla platform as a reliable source for dropshipping, welcoming anyone registered as a vendor. I aim to enable other Salla vendors to display my products in their stores and ensure streamlined order processing. Key Features: - Automatic order notifications: I want to be notified instantly when a vendor receives an order for my products. - Product synchronization: My product list should be synced across all vendor stores, ensuring accuracy and consistency. Branding & Design: - A unique logo and color scheme: Tailored to my brand to make a standout storefront. - Consistent branding with Salla: It's important our aesthetic aligns with that of the Salla platform to cultivate a sense of professionalism and trust. Payment System: - Sa...

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    Overview: We are embarking on a project to develop a mobile warehouse picking Android application that seamlessly integrates with our Odoo ERP system. This application will encompass all warehouse operations functionalities, including receiving, picking, and dispatch, utilizing mobile scanners for efficiency. To accomplish this, we are seeking an experienced Odoo Warehouse Integration Specialist & Process Flow Consultant. This role primarily involves creating custom Odoo modules using Python to facilitate data exchange between the mobile application and Odoo, as well as assisting in visualizing the application's processes through process flow diagrams. Key Responsibilities: Custom Odoo Module Development: Utilize extensive knowledge of Odoo warehouse processes to develop custom ...

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    I'm seeking an experienced developer versed in API testing using existing tools such as JMeter and others. The project focus is on API testing automation and the key aim here is to ensure API functionality. Scope necessary for the role includes: - Configure an existing tool to test all of our API endpoints. - Checking and guaranteeing the functionality of the API. - Proficiency in at least one API testing tool The API in question is used as a files check layer before uploading to S3. The users can upload files, list, download, and more. The API allow synchronous requests and async requests. We need to automate the testing in order to answer the following questions. - Are all the endpoints of the API working? - How much time is taking every endpoint (average time maybe)? - What was...

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

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    Preciso melhorar o processo de scraping no meu projeto atual. Para isso, busco um profissional que possa me ajudar a integrar o ScrapeOPS com o framework Playwright em Python, com o foco principal na melhora de eficiência deste processo. O principal desafio deste projeto será implementar mecanismos que permitam alterar o IP do bot para possibilitar mais requisições. Isso exigirá o uso de proxies para mascarar o IP do bot, o uso de uma VPN para alterar o IP do bot, ou talvez até mesmo a configuração de uma rotação de IPs a cada requisição. Algumas habilidades e experiências que seriam úteis para este projeto incluem: - Experiência com Python, particularmente o uso do framework Playwright...

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    Actualmente, estamos en proceso de desarrollo de una herramienta que sincroniza diversas características entre Shopify y nuestro propio sistema. Lo que buscamos es optimizar esta sincronización, con un enfoque especial en dos aspectos: - Sincronización de stock y descuentos: esta es nuestra principal prioridad, necesitamos que la información de stock y descuentos en nuestro sistema se refleje de manera precisa y rápida en Shopify. - Gestión de descuentos: hemos detectado que existen algunos errores en la gestión de descuentos en el proceso de sincronización, que deben ser solucionados. El candidato ideal para este trabajo es alguien con habilidades y experiencia demostrables en el desarrollo y perfeccionamiento de herramientas de s...

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    merhaba burada adreslerini ilettiğim (aloparca, otoparcasan, onlineyedekparca, parcafilosu) yedek parça sayfalarından harmanlanarak tasarlanacak, api ve xml ile ürün entegrasyonu olacak, diğer detaylar ımda görüşülecek. taleplerimize özel kodlama yapabilecek yazılım uzmanı arkadaşlar ve daha önce benzer deneyimleri olan arkadaşlar teklif verebilirler.

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    Ubicación: Remoto (Preferencia por Las Palmas) Duración: 3-4 meses Descripción: PortPal Solutions está lanzando un MVP y necesita un desarrollador Full Stack freelance con 3-4 años de experiencia. El 80% del proyecto consiste en implementar una API CRUD y desarrollar vistas en ReactJS utilizando un template ya existente. Buscamos alguien con experiencia en ReactJS y MySQL, abierto a aprender Golang si tiene conocimientos en otros lenguajes de programación como Python, PHP, Java, etc. Ofrecemos: Oportunidad de trabajar en un proyecto innovador con un equipo dinámico. Proyecto de corta duración con trabajo remoto, ideal para freelancers. Preferencia por candidatos en Las Palmas, pero abierto a talento global. Entorno de aprendizaje, ...

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    Como cliente, estoy buscando un desarrollador que pueda crear una aplicación web de reconocimiento facial de identidad. Más específicamente, necesitamos que esta funcionalidad sea integrada en contextos de los checadores mediante dispositivos con sistemas operativos Android. El candidato ideal para este proyecto debería tener: - Experiencia en desarrollo de aplicaciones web. - Conocimientos sólidos y comprobables en tecnologías de reconocimiento facial, específicamente en reconocimiento de identidad. - Capacidad para implementar soluciones en contextos de equipos con SO Android. - Un plus si esto también se puede ejecutar en Linux. Detalles del Proyecto: - El desarrollo de una aplicación web que incorpora tecnología...

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