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!

189,039 건의 리뷰 기록에서, 저희 프리랜서( API Developers )에 대한 거래선 측의 평가는 별점 5점 만점에 4.86점입니다.
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    32 건의 일자리 확인, 급여 기준: USD

    I need all of my Robinhood transactions to be integrated into my Koinly account. It's urgent, and I need it done quickly.

    $38 / hr (Avg Bid)
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    4 건의 입찰

    Integration Description for Shipment APIs **Objective:** Integrate the shipment creation API from `` into your shipping platform, enabling your users to create shipments directly through your system. **Endpoint:** `POST ` **Parameters and Description:** 1. **token (Required)** - **Description:** Authentication token for the API. - **Details:** It must be sent in the header. - **Example Value:** `OF4XbUwuQ0yj2bSO2Ejyg8PcllMGKzyRr0nA3W62JCLWi8siNk0IxwgUDNzDCopy` 2. **Shipment[type] (Required)** - **Description:** Type of shipment. - **Allowed Values:** `1` (Pickup) / `2` (Drop off) 3. **Shipment[branch_id] (Required)** - **Description:** ID of the branch. - **Allowed Values:** `1`, `2`, `3`, `4`, `5`, `6`, `7` 4. **Shipment[shipping_date] (Required)** - **Descr...

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    I'm in need of a capable freelancer with proficiency in API integration, Google Sheets, and WhatsApp. The project's main focus is to enable a fluid integration between WhatsApp and Google Sheets. This is to automate and streamline the process of sending our clients updates about their specific orders. Key information to be sent to clients include: - Status of the order - Estimated delivery date - Information about the assigned tailor/installer. Freelancers who have experience in similar projects are greatly preferred. Strong communication skills are a must for this project to be able to grasp and fulfil our exact needs.

    $252 (Avg Bid)
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    I need a simple, yet effective digital product selling site. It will be a WordPress platform. The site is set up to sell digital products with a mobile money payment method. Here's what I need: - Digital Product Selling: The site will be selling digital products exclusively. It should be set up for easy mobile friendly - Mobile Money Payment: The primary payment gateway will be mobile money. I have the API for this and would need it properly integrated into the site. - WordPress: The site should be built using WordPress, allowing for easy maintenance and future updates. The site should be designed to handle the sales process seamlessly. The user experience should be smooth and intuitive, as I intend to allow guest checkout – no requirement for user accounts. This means the pay...

    $203 (Avg Bid)
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    I am looking for a Shopify expert to integrate the Fastlo API into my existing store. My primary goal is to enable faster shipping options through this integration. Key Requirements: - High level of customization: I need unique configurations and features to be set up in order to make the most of the Fastlo API. You should be able to tailor the integration to fit specific needs of my store. Your Responsibilities: - Assessing my current platform and its shipping processes. - Developing a customized integration plan for Fastlo. - Implementing the plan with thorough testing to ensure reliable functionality. - Providing clear documentation or guidance on managing the new system. Ideal Skills and Experience: - Extensive experience with Shopify and its APIs. - Proven track record of successfu...

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    We operate an insurance brokerage in Australia and require a payments solution to overcome a specific problem. Description: 1. When we sell car insurance on our website, our customers enter their details into a Stripe widget on our webform. 2. We collect the customer's payment in our account, and then face the problem of neededing to send that money to an insurance company. It cannot be done via credit card, as the customer's credit card informtion is encrypted, so we do it by way of bank transfer, which is extraordinarily difficult and time consuming. It's a large volume of payments. 3. We require a solution which can somehow securely collect a customer's credit card information and then communicate that information into an insurance company's credit card payme...

    $362 (Avg Bid)
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    I'm in need of a Magento developer who can handle both front-end and back-end tasks Magento headless Application with Vue.js. Key Responsibilities: - Implementing changes and enhancements to the website design and layout - Ensuring that the website design is responsive on all devices - Enhancing the user interface (UI) to improve overall user experience - Handling back-end tasks within the complete Magento stack - Magento APIs and GraphQL Ideal Skills and Experience: - Proven track record as a Magento developer - Proficient in both front-end and back-end development - Skilled in implementing responsive design and enhancing user interface - Experience with a variety of Magento themes I already have an existing Magento theme, so the chosen freelancer will have to incorporate the nece...

    $19 / hr (Avg Bid)
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    I am looking for a developer to build a Java Spring Boot API for a web application targeted at the general public. I need someone to write the API for me. The application will have the following key features: - User Authentication and Authorization: The application should allow users to create accounts, log in securely, and manage their personal data. - Real-Time Data Processing: The API needs to handle data updates in real-time and ensure that users are provided with current information. The ideal candidate should have: - Proficiency in Java and Spring Boot: Demonstrated experience building robust, scalable APIs using Java Spring Boot. - Strong understanding of user authentication and authorization protocols. - Prior experience integrating payment gateways into web applications. - So...

    $250 - $750
    $250 - $750
    45 건의 입찰

    Consultor Experto en servicios Api WhatsApp Business Requerimientos : Hablar Español Consultor Experto

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    I have both Yeastar Call Centre system and Ceipal API and I need a skilled professional to create a real-time integration between them. Key Integration Requirements: - Call logging in Ceipal - Click-to-dial from Ceipal - Automated contact creation in Ceipal from Yeastar calls and vice versa - Call Recording logging in Ceipal Ideal Skills and Experience: - Extensive experience with Yeastar Call Centre setup - Proficient in working with Ceipal API - Proven track record of successful real-time integrations - Knowledge of best practices in VOIP and API integration - Strong understanding of Call Centre and CRM operations If you have experience with Yeastar, Ceipal, API integrations and a good understanding of Call Centre operations, please get in touch. Your expertise will ensure a seam...

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    I'm in need of a highly capable Sports Betting Bot that can automate the process of placing bets, monitor odds in real-time, and efficiently manage my bankroll. The bot should primarily support Bet365, FanDuel, Draft Kings, MGM, and Ceasars. Key Features: - Automated Bet Placement: The bot should be able to swiftly place bets on the selected platforms based on predefined criteria (Arbitrage betting). - Real-Time Odds Monitoring: It is crucial for the bot to monitor the odds continuously and place bets at the best possible odds available. - Bankroll Management: The bot needs to have a robust bankroll management system, ensuring optimal investment strategies and risk management. Skills and Experience: - Proficiency in sports betting and the specific platforms mentioned. - Strong ba...

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    96 건의 입찰

    I am in need of an ASP .Net Core and DevExpress expert to assist in integrating these technologies seamlessly into my React frontend. Key requirements: • ASP .NET Core application with DevExpress XAF Framework with multi-tenant module. • The application will serve as the backend for the React frontend. • The application will use DevExpress’s multi-tenant module to manage each client on a separate database. • Database: MySQL. • The application will be published on an Azure App Service using MySQL flexible server.

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    Project Overview: I need a Telegram app like Hamster Kombat, with an elegant and professional design. The project is very urgent. I am looking for an experienced developer who can quickly deliver a Telegram-like app. The app should be available only on the Telegram platform. Platform: Telegram. Technology Stack: JavaScript, Node.js, and any Telegram Bot API. Graphics: High-quality, animated graphics for hamsters, arenas, and combat effects. User Authentication: Secure user accounts with phone number verification. Payment Processing: Integration with payment gateways for in-game purchases.

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    We are seeking a skilled Ionic developer with strong experience in Python backend development to integrate social media login functionality into our mobile application. The ideal candidate will have a proven track record of implementing seamless and secure social media logins using various platforms such as Facebook, Google, and Twitter. You should be proficient in both Ionic and Python, with a keen understanding of authentication protocols and best practices. Attention to detail, problem-solving abilities, and excellent communication skills are essential for this role. Join our team and help enhance the user experience with streamlined social media login capabilities.

    $21 / hr (Avg Bid)
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    I'm looking for experts for the integration between a CRM and Go High Level (GHL). Key tasks include: - Contact synchronization, ensuring a dynamic two-way sync of contact details between the platforms. - Task and appointment synchronization, ensuring tasks and appointments are updated in real-time on both platforms. Ideal Skills: - Proficient in CRM integration, particularly with GHL and any of the other CRM platforms like Salesforce, Hubspot, or Zoho CRM. - Excellent understanding of two-way synchronization processes. - Detail-oriented with a keen focus on task precision to ensure no data loss. All in all, I need to maintain data consistency, avoid any redundancy and above all, enhance the overall operational efficiency.

    $521 (Avg Bid)
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    30 건의 입찰

    OVERVIEW: We currently use Zenoti as our booking and Point-of-Sale system for patients. We have recently begun migrating from Quickbooks to Microsoft Business Central Essentials ERP to help better manage our financials. Unfortunately, there is no one-click or native app that integrates these platforms. Additionally, we have added on D365 Customer Insights and D365 Sales to help better manage our patient marketing (for existing patients) while better preparing our small practice to streamline our marketing and advertising activities with future opportunities and patients. Zenoti has an API portal that is documented and supports connections across it's modules: WE'RE LOOKING FOR: As an individual or team experienced with Microsoft Dynamics CRM, we need your expertise to aid in...

    $1500 - $3000
    파워형 봉인형 NDA (비밀 유지 계약서)
    $1500 - $3000
    32 건의 입찰

    Hi, I need my Spanish voice to be translated into English (cloned, it should sound like it is me) and the English answers to be translated into Spanish. I don't know if there is an application that does this or if it could be developed. The objective is to be able to conduct interviews without having problems with the language.

    $19 / hr (Avg Bid)
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    Hi, I need my Spanish voice to be translated into English (cloned, it should sound like it is me) and the English answers to be translated into Spanish. I don't know if there is an application that does this or if it could be developed. The objective is to be able to conduct interviews without having problems with the language.

    $21 (Avg Bid)
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    32 건의 입찰

    I'm looking for a professional to integrate multiple applications into one. The primary goal is to merge the data set and API links into one application. All the required files are already organized into a single folder. Key Requirements: - Expertise in application integration and optimization. - Proficiency in working with APIs. - Prior experience with merging data sets. Timeframe: I need this project completed within a month. i gave the github, repo, and dataset link, you just need to combine it for me

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    3 건의 입찰

    We have a Windows Server 2019 Running IIS10 that hosts many websites. We want to use the Javascript onclick event attribute property (On an exiting web page Button) to call a function that will send an SMS Message. We need you to write that function. We have a nice .aspx contact form that uses VBScript and it works great and easy to maintain. So we want code written in VBScript that we can paste anywhere in a website as a <script>, to allow a standard button to send an SMS message (using a the web page BUTTON OnClick Property to call the script). We are considering two different SMS vendors. They both have a large API to receive the SMS messages. The first one is CLickSend. Here is the link to their API information: The second one is Twillo. Here is their link for the API...

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    Web Scraping 9 Websites 2 일 left

    We are looking to scrape 9 data sources to find tradespeople. In this document, I share the lists we'd like to scrape and the required fields. This scraping is to be done with code that will be shared with us, ideally in Python. For all 9 sites our fixed budget is INR 10,000

    $2 / hr (Avg Bid)
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    I'm looking for a skilled Zapier and expert who can help me integrate various tools and improve my current configurations. Here are the things we work on to get an idea: - Creating automated workflows - Connecting multiple apps - Customizing triggers and actions - Sending email notifications - Updating CRM stages I need someone with extensive experience working with Zapier who understands its capabilities. Your ability to be detail-oriented and communicate clearly is very important for this project."

    $11 / hr (Avg Bid)
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    I'm seeking a freelancer with experience in GSM modem communication and interactive USSD codes. The project involves setting up a system that can communicate via USSD codes with the use of a GSM modem. Key Requirements: - 3G/4G compatibility: The modem should be able to support 3G/4G networks for seamless data transmission. - Multiple SIM support: Ability to support multiple SIM cards for increased flexibility and efficiency. - SMS/USSD balance inquiry capability: The modem should support both sending and receiving USSD codes for balance inquiries and other interactive features. - Support for USSD sessions: The freelancer should be able to set up and manage USSD sessions efficiently. - API for third party calls: The modem should support API for third-party calls to ensure smooth int...

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    Qualifications: - Minimum of 3 years of experience in Design, Build, Test, and Deploying Workday Integration solutions using Custom Reports, EIB, Core Connectors, Document Transforms, XSLT and Workday Studio. - Experience with Web Services and APIs (WSDL, SOAP, REST and WS standards) - Proficiency in Workday Report Writing - Knowledge of Workday Financials Area - Detailed understanding of Workday Integration processes and best practices - Excellent written and spoken communication skills in English Nice to have: - Previously experience as a Certified Workday Consultant -Ability to work in an Agile environment with ticket management and project management tools like JIRA, Service Now, etc - Strong analytical and problem solving skills Shift: 9AM to 5PM EST Employment type: Direct Hire Per...

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    26 건의 입찰

    I'm in search of a professional web developer who can design a website (a website that will be integrated with our current at Squarespace would be most preferable). The primary objective is to create a user-friendly platform where customers can log in using their Google credentials or similar login. Once logged in, they should be able to: - Choose a topic from a dropdown menu - Being able to ask the AI chatbot questions about our (uploaded) research materials related to the selected topic Key Requirements: - Integration of Google login for customers - Open Source LLM API-connection for the chatbot -- Minimal design customization with a basic template Please note that all the research materials will be provided by us in PDF and Word formats, organized by topic. The LLM MUST answer...

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    I have a Java Spring Boot project (using hibernate) wherein I specifically need implementation of API endpoint access control with role-based permissions. Each endpoint is listed in a table, with permissions for each HTTP method (GET, POST, PUT, PATCH, DELETE). Each endpoint is also a member of a category (e.g., all endpoints for vehicles are in vehicle category, all endpoints for payments are in payment category, etc) I also have a separate list of roles and users and a user_role match for each combination of role and user. I need help with creating Entities and implementing the complete role based framework between users, roles and endpoints. The workflow is as follows 1. A user is assigned as a member in a single role 2. Each role will be given permissions for each category 3. Each...

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    I'm in need of a skilled developer to create an API utilizing Angular for the front end and MySQL as the backend database. The API will serve as a data source between BI software like Qlik and other custom built applications. Key Requirements: - Front-end: The API should utilize Angular to create a user-friendly popup screen. This screen needs to capture the following user parameters: User name, Password, No of rows, and Estimate size. - Backend: The API will be connected to a MySQL database. The developer should have strong experience in MySQL to ensure efficient and secure data handling. Authentication: The API should implement password authentication. For this project, only the password needs to be authenticated. Error Handling: In cases of invalid passwords, the API should ret...

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    Estamos buscando persona que tenga experiencia en conexión con la la API de Meta y la API de WhatsApp Experiencia comprobable en proyectos reales.

    $118 (Avg Bid)
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    I'm currently in need of a skilled front end developer who can create a modern and minimalistic design for my hotel booking website. The ideal candidate will also excel at API integration with an external system. The core functionalities required for the website are real-time availability checking, online payment processing, user account creation and management, and a seamless API integration. Key responsibilities and requirements: - Design: The website should embody a modern and minimalistic design aesthetic. The candidate should have a strong portfolio of similar work that showcases their design capabilities. - Front End Development: Knowledge and expertise in modern front end development technologies is essential. - API Integration: Proficiency in integrating the website with ext...

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    We are seeking a skilled developer to integrate the Noqodi payment gateway into our existing WordPress website using WooCommerce. The ideal candidate must have prior experience with Noqodi integration and be proficient in PHP, HTML, MySQL, JavaScript, and WordPress development. Key Requirements: Experienced PHP developer Familiarity with Noqodi payment gateway integration Proven experience with WordPress and WooCommerce Ability to customize the integration to meet specific business needs Capability to complete the integration swiftly Additional Details: Noqodi has provided comprehensive API documentation (300 pages). See the attachment. The developer may need to coordinate with the Noqodi support team as necessary. Preference for developers who have successfully completed similar project...

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    I'm in need of a developer who can create a mobile and web maze game that will captivate players of all ages. Key Requirements: - Development for both mobile and web platforms - Maze game genre - Appeal to a broad audience (kids, teens, and adults) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- please note : * it is very sample and small game with 1 level (time from start until win is less than 4 minutes) * with 2 characters only (you will choice 1 chara...

    $1250 (Avg Bid)
    파워형 NDA (비밀 유지 계약서)
    $1250 (평균 입찰가)
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    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

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