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!

De 177,843 opiniones, los clientes califican nuestro API Developers 4.88 de un total de 5 estrellas.
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    33 trabajados encontrados, precios en EUR

    Se requiere desarrollar un módulo Desarrollar un módulo para MercadoLibre para el monitoreo y gestión de las devoluciones y reclamos generados en MercadoLibre a través de consultas en la API de MercadoLibre. El código desarrollado (backend) lo integraremos a una herramienta (frontend) que ya tenemos. A) Devoluciones Requerimos tener un apartado (pestaña) para poder monitorear y dar seguimiento a los productos que estarán siendo devueltos. En donde nos muestre: - Número de venta. - Usuario (comprador). - SKU del producto. - Titulo de Producto. - Estado de la devolución. - Fecha de la devolución. - Motivo de la devolución. De esta manera podemos monitorear y estaremos al tanto de la devolución. B) Re...

    €173 (Avg Bid)
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    15 ofertas
    Explicación y Acción de API 1 día left

    Tengo contratado un servicio de API desde la cual extraigo datos para un servicio de Coach hacia mi web en Wordpress, necesito un programador especialista que me explique su funcionamiento y creación de algunos shortcodes para su llamada de información especifica y que se vea reflejada en mi web.

    €20 / hr (Avg Bid)
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    21 ofertas
    Flutter Search Issue 6 días left

    I have a search issue in my flutter application where I cannot search for services. The function used to work but it stopped working and I'm not sure what has made it so. The app is not searching for services as you type or even after typing and pressing enter. I need it fixed. The app has API endpoints. Note: Bid with FINALITY no counter bids on chat once we start engagement. Thank you.

    €23 (Avg Bid)
    €23 Oferta promedio
    11 ofertas
    Customise PHP 6 días left

    We have an existing system that requires custom backend work - PHP, Laravel, MySQL, Dreamhost. Account management (Login security) User profile review (Feedback/comment) API integration Would need help with deploying these into the current deployment as well.

    €12 / hr (Avg Bid)
    €12 / hr Oferta promedio
    45 ofertas
    ChatGPT API Integration 6 días left

    I need help with a potential ChatGPT Integration

    €107 (Avg Bid)
    €107 Oferta promedio
    25 ofertas
    payment services platform. 6 días left

    I would like to hire a team that can help me build a payment services platform. The platform will involved connecting into an issuer processor on the card scheme side and the core banking ledger on the customer side. Phase 1 - will include plugging into the processors API and creating our own API to plug into the platform.

    €1520 (Avg Bid)
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    33 ofertas
    webflow Developer 6 días left

    IMPORTANT if you dont have experience with Webflow d'ont bid . thank you Hi, I'm looking for an expert Webflow developer to build a full website for me. The project's complexity would be low. Webflow is the main technology that will be used for this project. If you're an experienced Webflow developer and have the skills to create a professional website then please submit your proposal! I'm looking forward to hearing from you!

    €76 (Avg Bid)
    €76 Oferta promedio
    17 ofertas

    The project aim to build a tool for daily monitoring for water quality data captures from satellite ..

    €13 / hr (Avg Bid)
    €13 / hr Oferta promedio
    17 ofertas
    €275 Oferta promedio
    9 ofertas
    Office 365 App 5 días left

    I am looking to create an app that would enable my clients to authorize my web app to have access to their office 365 account - specifically Outlook and OneDrive Initial task is consulting about the process Second tasks is help with code

    €14 / hr (Avg Bid)
    €14 / hr Oferta promedio
    10 ofertas
    Content anlysis 5 días left

    I'm looking for an expert to design online content analysis for pdf documents. The expert should have knowledge in web design, cloud computing, online processing. No detailed report is necessary. This project is needed to be completed once only.

    €407 (Avg Bid)
    €407 Oferta promedio
    32 ofertas

    Hi, I searching for a crew3 bot. I've found a bot on GitHub that do 50% of what I need but the bot doesn’t work anymore. Please take a look on the crew3_bot.pdf. You will see what i need. I have also attached the source script in a .zip. Thank you

    €232 - €697
    €232 - €697
    14 ofertas
    Install Shopify PHP SDK 4 días left

    I need install in my webserver without composer

    €22 (Avg Bid)
    €22 Oferta promedio
    12 ofertas

    I need to implement a Virtual assistant (AKA conversational AI), using NVIDIA Omniverse Avatar Platform? ChatGPT + Unreal engine? The key is to use a Real Time Avatar, for a more realistic effect. The computation should be done ideally on cloud, to keep hardware cost low. Since we start from zero, the timeline for the project is long.

    €810 (Avg Bid)
    €810 Oferta promedio
    32 ofertas

    *Laravel Application *Gameslist and live odds Api integration * Only bid if you have worked on btting website

    €58 (Avg Bid)
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    6 ofertas

    I need help with a project that requires a Pronto Xi POS Developer to help with creating new functionality for a finance module. The technology I am currently using is Java, so the developer needs to possess a good understanding of this language. This position is perfect for a remote candidate, as I can leave the Project Manager on site and require the Developer to work remotely. The responsibility is to design and develop new functionality, based on customer requirements and systems design documents. The Developer will then report back to the Project Manager on their progress, seeking assistance and guidance when necessary. This developer must have previous experience working on Pronto Core Modules. anyone without previous Pronto Experience will not be awarded the project.

    €46 / hr (Avg Bid)
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    12 ofertas

    Desenvolvedor com conhecimentos em NodeJS e Typescript, para integração da nossa plataforma com as api de cada uma destas plataformas e pagamento feito por integração feita e com valores para cada uma Amazon (valor por esta integração entregue R$800,00) Ali express BR (valor por esta integração entregue R$800,00) Netshoes (valor por esta integração entregue R$600,00) Magazine luiza (valor por esta integração entregue R$600,00) B2W (valor por esta integração entregue R$600,00) Via Varejo (valor por esta integração entregue R$800,00) shopify (valor por esta integração entregue R$800,00) Nuvem shop (valor por esta integração entregue R$800,00) loja inte...

    €874 (Avg Bid)
    €874 Oferta promedio
    6 ofertas

    I need a WordPress plugin Developer.

    €39 (Avg Bid)
    €39 Oferta promedio
    19 ofertas
    Sports API Intergration 3 días left

    I have the front end,I need my API Intergrated and I need to see previous work of the individual for this job...b/c all I've been getting is promises. I need this done asap. The site should look like It should have all the functions and there are 22 sports Thank you

    €2130 (Avg Bid)
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    69 ofertas

    I want customer to book his flight ticket thru WhatsApp. The way we do it is we link in WhatsApp API with airlines APIs. Some users go on airline booking website to book any flight in the world. But I want to make the booking thru WhatsApp by linking the airlines api with WhatsApp. I will give the developer all APIs for ticketing for the airlines. So any customer can make the booking on WhatsApp by entering his name, date of departure, city of departure, city of arrival , etc. Then he will receive on his WhatsApp all flights available.

    €1372 (Avg Bid)
    €1372 Oferta promedio
    25 ofertas

    I need a website to keep a track of live Indian Stock market price. 1. Get the top gainers and top losers in futures segment 2. Get the top gainers and top losers in equity segment 3. Get the current futures price of a stock 4. Get the current equity price of a stock Either paid or free API can be used.

    €276 (Avg Bid)
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    8 ofertas
    Need Betfair Api 3 días left

    Need Betfair Api for live sports data, match list and odds

    €12 (Avg Bid)
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    5 ofertas
    CLOVER POS EXPERT 2 días left

    Need someone to help me with integration bringing in orders from CLOVER from online ordering

    €98 (Avg Bid)
    €98 Oferta promedio
    13 ofertas
    API Integration 2 días left

    I am looking for a Freelancer to help me with an API integration project. Specifically, I need help with data integration. The integration will involve a third-party API, however I do not have access to all the necessary API keys. I need assistance in obtaining these keys and integrating the data into my system. Any experience in this area would be helpful. This project is extremely time-sensitive, so speed and efficiency are absolutely essential. Iam creating same platform as so need someone expert to handle the task.

    €94 (Avg Bid)
    €94 Oferta promedio
    11 ofertas

    Hello, I am seeking a skilled Blackhawk network developer to create an application for me. The application needs to be developed for the web platform, but there may be future opportunities for iOS and Android versions. I am open to negotiate on the timeline for this project, and features such as payment integration, security verification, and data analysis can be determined at a later date. The ideal candidate should have extensive experience with Blackhawk network platforms and be comfortable working in a fast-paced development environment. If you think you have the skills necessary to accomplish this project, please apply and we can discuss further further details.

    €13 / hr (Avg Bid)
    €13 / hr Oferta promedio
    9 ofertas
    Need a laravel developer 2 días left

    Need a laravel developer who has experience in php, laravel, API.

    €19 (Avg Bid)
    €19 Oferta promedio
    25 ofertas

    Description: We are a SAAS company specializing in processing call recordings for compliance and call monitoring. We have an API that allows users to send meta-data and calls for compliance and analysis processing. We are looking for an experienced developer to help us build integrations with various call providers such as Aircall, ConnexOne, TalkDesk, and 8x8, using their public APIs. Project Requirements: - Strong experience in Python and building microservices on AWS. - Proven experience working with various API integrations, preferably with call providers. - Ability to work independently and deliver high-quality, scalable solutions. - Willingness to take on the challenge of integrating with multiple call providers and CRMs in future projects. The main objective of this project is to ...

    €14 / hr (Avg Bid)
    €14 / hr Oferta promedio
    10 ofertas

    I'm looking for an experienced developer to help me with integrating FriendlyACS with WHMCS. The project requires the integration of the two software platforms via an API. The compatible versions of WHMCS that I need to use are 8.0 and higher. A WHMCS Addon will be the outcome of this project which will enable the provisioning and display critical information to the user via the client facing area. The estimated time frame for the task is 4-7 days. Any help completing this integration is much appreciated. The coder must have good knowledge of WHMCS to be able to execute this task. Testing will be critical. The API Commands to be integrated are -: The API includes an XML/SOAP Interface to the Server via web services. Main functions of the API: • Sends parameters (settings) to ...

    €521 (Avg Bid)
    €521 Oferta promedio
    23 ofertas
    OAuth2 integration 10 horas left

    We are having an application where were using a feature to read emails from IMAP, email are hosted with office 365. Now Microsoft has stopped supporting IMAP and instructed to only use OAuth2. We are looking for a developer who is skilled in OAuth2 and fix the functionality to read emails.

    €91 (Avg Bid)
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    5 ofertas

    i have this api i want to integrate with my wordpress website i need you to show me how i can do it this is the documintion

    €78 (Avg Bid)
    €78 Oferta promedio
    17 ofertas
    Mobile pos App 7 horas left

    2. The system is like a point of sale but may not have all functions of a pos just a few functions of a pos . l have a video showing the presentation but unfortunately here you cant upload a file bigger than 25mb .

    €719 (Avg Bid)
    €719 Oferta promedio
    56 ofertas
    Build me a Website -- 2 6 horas left

    I'm looking to hire an Django and Mongo DB expert who can able to write SEO-friendly Blogs . I want to hire for a full-time role. Please bid with your portfolio if you're interested. I have domain and ubuntu server. Django, Mongo DB, API, Git

    €225 (Avg Bid)
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    18 ofertas
    Explicit Filtering Phase -- 2 Finalizado left

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

    €437 (Avg Bid)
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    29 ofertas

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