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 175,306 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

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 175,306 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

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    34 jobs found

    Configure a gemini API to answer questions based on a pdf (pdf integrated into the API and not changeable) then integrate the API into my existing html code. the API must read the PDF and answer the user based on its understanding of the pdf and displays the answer.

    $47 Average bid
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    13 bids

    Job Posting: I need a system that can automatically process incoming emails containing data in table format. The data should be reorganized into a specified format and then sent to two different Telegram groups/channels: Channel 1: Send all the data. Channel 2: Send only one-third of the data. The process must be fully automated and complete in under a minute. Requirements: Use Gmail API to retrieve email data. (or any other that you might think of) Implement an automation system (such as Zapier or a custom script) for processing and formatting the data. Send the processed data to the Telegram groups/channels accordingly. Provide all necessary tools and clear guidance on how I can adjust or customize this process independently in the future. Please include a brief proposal detailing yo...

    $140 Average bid
    NDA
    $140 Avg Bid
    5 bids

    I'm looking for a mobile app developer to create an order and delivery based e-commerce app for groceries. This app needs to be compatible with both iOS and Android platforms. Key Features: - Order Placement: Users should be able to easily select and order groceries. - Delivery Tracking: The app should provide real-time tracking of grocery deliveries. - Payment Processing: Secure and seamless payment gateway integration is crucial. - User Management: The app must include features for user registration, login, password recovery, etc. Ideal Skills: - Extensive experience in mobile app development, particularly for e-commerce. - Proficiency in both iOS and Android development. - Previous experience with implementing delivery tracking systems in an app. - Strong understanding of secure ...

    $656 Average bid
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    21 bids

    I'm in need of a Python developer capable of creating a real-time soccer goal alert system. The main function of the system will be to notify as soon as a goal is scored. It should faster than Key Features: - The system should be able to deliver alerts instantly, with priority given to speed and reliability. - Alerts need to include the scorer's name and the time of the goal. Data Sources: - The system should utilize third-party sports data providers or custom web scraping solutions for real-time soccer updates. Alerts: - The system should simply send information when a goal is scored. Further processing will be handled on my end. Ideal Freelancer: - You should have relevant experience in handling real-time soccer data and building alert systems in Python. - If you can prov...

    $223 Average bid
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    29 bids

    Preferred Tech Stack: • Frontend: Flutter, Bubble, , or another robust framework suitable for complex API integrations. • Backend: Node.js, Firebase, AWS, or other scalable serverless architectures. • Database: PostgreSQL, MongoDB, or another scalable database solution to replace Airtable. What We Need: 1. Backend Migration & Optimization: • Migrate existing data and workflows from Airtable to Xano to establish a scalable, efficient backend. • Set up secure user authentication and account management using Xano, while maintaining compatibility with Memberstack if needed. • Streamline backend processes, automations, and data management currently handled by Zapier. 2. API Integrations Using Wized & Xano: • Uber Direct API: Enable restaura...

    $690 Average bid
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    24 bids

    Description: Hi, I’m looking for an experienced developer skilled in Flask, , and especially Redis. This project is already built—it’s a small betting game—but it currently faces performance issues due to database latency. Using ElephantSQL as our database, responses take about 0.53 seconds, which isn't ideal for a real-time application. To resolve this, I need someone who can quickly implement Redis as an intermediary. The goal is to have the client side communicate with Redis directly, while Redis handles database updates on the backend. This setup should create a seamless experience, reducing load times to near-instantaneous for users. Requirements: Extensive experience with Flask, , and Redis. Knowledge of real-time applications, ideally in bet...

    $303 Average bid
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    8 bids

    I'm looking for a professional who can set up a new JIRA service desk instance specifically for our IoT Connectivity Clients to log tickets and allow for issue tracking and workflows. This system will be used as an IoT ticketing system to manage clients' support requirements. We already have licenses for the teams. And have attached examples of the workflows. Expected hours are in the region of 40 to 60 hours total. Key Requirements: - Full setup of a new JIRA Service Desk with workflows - Configuration of user access for specific teams - Ensuring the system is tailored for IoT support ticketing - Integration of 1 JIRA platform to another for automation. Ideal Skills and Experience: - Proven experience with JIRA Service Desk setup and configuration includin...

    $4363 Average bid
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    5 bids

    I need a professional to integrate MEWS hotel management software with TTHOTEL Door Locks via the KEY INTEGRATION API. The goal is to automate the creation of door keys based on guest check-in and check-out times. Key Requirements: - Transfer of specific data: The integration needs to handle the real-time transmission of check-in and check-out times along with the corresponding room numbers from MEWS to TTHOTEL Door Locks. - Real-time synchronization: This isn't a one-off task. The system needs to constantly sync in real-time to ensure that door locks are updated instantly in accordance with the hotel's guest status. - API key for authentication: The integration will use an API key for authentication purposes, so experience with secure API integration is a must. Ideal Skills: -...

    $911 Average bid
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    48 bids

    I'm looking for two seasoned developers with expertise in WordPress and Wix. The developers should be proficient in core level PHP programming as I need custom changes and integration of an API from another LMS site into my WordPress website. Key Requirements: - Custom Plugin Development: The primary task will be to develop a custom plugin for my WordPress site. - API Integration: Seamlessly integrating an API from another LMS site. - Custom Changes: Making necessary custom changes to my WordPress site. Ideal Skills: - Extensive knowledge in custom PHP programming. - Proficiency in WordPress and Wix. - Strong experience in custom plugin development and API Integration. Intended Use: The website is intended for a business site. Therefore, the custom plugin should ideally include fun...

    $157 Average bid
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    18 bids

    Budget $200 fixed for entire project! and please don’t bid if you’re not interested and non responsive! (Budget is fixed non negotiable) I'm looking for an Okta specialist who can enhance my existing work Okta workflows for better license monitoring and error handling. Key Requirements: - Improving error handling within the license validation steps. - setting up count threshold if less than x number it will send an alert - Okta workflow able to count the total active users’ license and available licenses Ideal Skills: - Proficient in Okta workflow automation. - Experienced in error handling and validation processes. - Capable of setting up reliable notification systems. Please note, this project is primarily focused on enhancing existing workflows and improvi...

    $157 Average bid
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    7 bids

    I'm seeking a talented software developer to create a comprehensive system focused on managing customer data. The software will be primarily used for data management, and it needs to have a specific feature for compliance reporting. Key Responsibilities: - Design and develop a user-friendly software system - Implement a robust customer data management feature - Integrate a comprehensive compliance reporting system Ideal Skills: - Proficiency in software development, particularly in data management systems - Experience in designing customer relationship management software - Understanding of compliance requirements and ability to implement reporting systems

    $32 / hr Average bid
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    84 bids

    I am looking for a programmer who can help me with rapid api (pinnacle odds, results). A kind of betting demo account where you can work with different account sizes. Visually, it should resemble a betting provider, but with a few additional fields before the “place bet”. It should include an account creation function, and the different demo accounts from 1k up to 50k (1k, 2k, 5k, 10k, 25k, 50k). The user can purchase multiple demo accounts. The odds should always be up to date, which means we need some requests. In addition, a “conclusion” should be written at certain milestones for the user to make an evaluation. In addition, the whole site should be intuitive, fast and visually appealing

    $1109 Average bid
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    55 bids

    Project Overview: We are seeking a skilled Webflow developer to optimize and fix our existing Webflow platform, ensure complex API integrations are fully functional, and enhance the UI/UX to provide a seamless experience. Our platform, Greebly, is a SaaS solution for restaurants designed to cut costs and simplify online sales through automation of orders, deliveries, and customer engagement. What We Need: 1. Webflow Optimization & Fixes: • Audit the current Webflow site to identify and resolve existing issues. • Enhance the UI/UX to ensure it is intuitive, user-friendly, and fully integrated with all API functionalities. • Optimize the overall site and portal speed to improve performance and responsiveness. 2. Backend & Integration Fixes: • Ensure the e...

    $622 Average bid
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    86 bids
    AI-Assisted Teacher Platform
    4 days left
    Verified

    The project involves developing a web platform designed to automate and enhance the daily tasks of teachers through artificial intelligence. The application will enable teachers to generate and correct exams, create customized activities and assignments, and evaluate student performance based on specific curricular competencies. Additionally, the system will continuously learn and improve through user interactions, and it will feature an advanced OCR system to process written exams. The platform must be scalable and adaptable to various educational levels and regions, starting with high school and aiming to expand into vocational and university education in the future

    $5487 Average bid
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    47 bids

    Project Title: Development of a Prototype Web Application with Generative Functionalities Start Date: November 15, 2024 End Date: December 16, 2024 Budget: Maximum contract for this pilot project is $15,000 Project Description: We are seeking a skilled and innovative developer or development team to design and create a prototype web application. This application will showcase advanced generative functionalities, and it is intended for internal evaluation rather than public release. The prototype will serve as a foundation, meeting all necessary precursors for future public readiness. This is a comprehensive project requiring expertise in web development, secure coding practices, accessibility standards, and integration with cutting-edge AI technologies. Key Features and Requirements...

    $21538 Average bid
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    54 bids

    Scope of works: Develop a POS application using Zoho Creator based on my requirements, and connect it to Zoho Books using an API connection or Zoho Flow.

    $330 Average bid
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    20 bids

    I'm seeking a pro to help automate my podcast production using AI. The automation will encompass script generation, voice synthesis, and publishing. Ideally, you should have experience with Google Notebook LM for voice synthesis, but we can use any AI tool for voice synthesis and audio generation The podcast should be published automatically on Spotify and Amazon Alexa I need someone to join me on a video call and teach me how to use zapier or I don't need someone that just gets the project done. I need someone to explain me step by step how to use Zapier or to automate the tasks to create my podcast.

    $14 / hr Average bid
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    24 bids

    I have installed this model locally . I have brought up the gradio interface and can see it working to upscale an image. There is an example in python, however I want a simple example in c# to take an image and upscale this , and save the result to disk somewhere. The input image and output image file locations can be hardcoded. If interested please do indicate whether you can do this, and whether you have this already installed, as I would like to get this assigned very quickly. Thanks,

    $255 Average bid
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    66 bids

    I need a professional C# developer with experience using the Quantower API to enhance my Quantower trade panel. Requirements: - Add two fields: Risk(%) & Gap(pts) - Add two buttons: BUY and SELL Functionality: - Clicking the "BUY" button executes a market buy with: - SL = Lowest of the last four candles - Gap - TP = chart panel TP points - Lots = Risk(%) according to SL - The "SELL" button does the same but with: - SL = Highest of the last four candles + Gap Please provide your best price and estimated completion time for this job.

    $267 Average bid
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    48 bids

    I'm in need of a shipping and logistics expert who specializes in FedEx. The project entails both domestic and international shipping. Key Responsibilities: - Assess and optimize my domestic and international shipping processes using FedEx. - Provide guidance on international shipping rates and pricing. - Ensure package tracking and delivery assurance. Ideal candidates should have: - Extensive experience with FedEx. - Strong knowledge of international shipping and logistics. - Excellent problem-solving skills. - Ability to provide cost-effective shipping solutions. Your expertise will be crucial in improving my shipping efficiency and reducing costs. Looking forward to your bids.

    $257 Average bid
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    40 bids

    I'm seeking a skilled developer to create an AI-powered callbot. This virtual assistant should be capable of: - Booking and confirming appointments - Answering basic queries about services and pricing - Interacting in Spanish - Sending automated appointment reminders - Facilitating appointment rescheduling - Handling appointment cancellations - Personalizing responses based on user data - Conducting post-appointment follow-ups The callbot needs to be done using make. It should be able to field questions about the services we offer and our pricing. Therefore, a background in customer service software or similar applications would be beneficial. Please only apply if you have significant experience in AI and API integration, and can provide examples of similar projects you have compl...

    $1026 Average bid
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    37 bids

    I'm looking for an experienced backend developer to join our team for a long-term project, initially set at 12 months minimum with the potential for extension. The ideal candidate should be highly proficient in Node.js, React, and PostgreSQL. You’ll be responsible for building, maintaining, and enhancing our backend services while collaborating closely with our front-end and design teams. Requirements: Strong expertise in Node.js for backend development. Solid understanding of React for server-side interactions. Extensive experience with PostgreSQL and database management. Proficiency in RESTful API design and integration. Familiarity with Git and version control. Excellent problem-solving skills and attention to detail. What We Offer: Monthly Budget: $1000 USD Fulltime work....

    $24 / hr Average bid
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    145 bids

    Join us for an exciting project! We’re looking for a skilled professional to configure our VOIP Yeastar Call Centre / HubSpot systems and seamlessly integrate them with our ATS / CRM Ceipal via an open API. This is a fantastic opportunity to showcase your expertise, work with a dynamic team and make a meaningful impact on our operations. If you have proven experience in ATS / CRM / VOIP setups and API integrations, we’d love to hear from you! We have full access to the Yeastar Call Centre, HubSpot and Ceipal open API documentation and are looking for a skilled professional to build a seamless, real-time integration between these systems. Key Integration Requirements: - Call logging in Ceipal / HubSpot - Click-to-dial from Ceipal / HubSpot - Automated contact creation in ...

    $325 Average bid
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    41 bids

    We are seeking a Klaviyo expert to create an interactive product recommendation survey form within our Klaviyo account, integrated with BigCommerce. This survey will dynamically recommend DOPE THC products based on user preferences and automatically tag and segment users for targeted email marketing. The ideal candidate will have experience with Klaviyo’s form-building and automation tools, integration with BigCommerce, and advanced segmentation to optimize product recommendations and drive customer engagement. Responsibilities • Build an Interactive Survey Form in Klaviyo: • Create a product recommendation survey using Klaviyo’s form builder, following a conditional logic flow based on user answers (e.g., preferred cannabis effects, delivery methods, product...

    $340 Average bid
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    27 bids

    I'm in need of a seasoned Python developer to troubleshoot my automation script. The script is crashing unexpectedly, preventing it from running successfully. Key Requirements: - Analyze the existing code - Identify bugs - Implement fixes to ensure smooth execution Ideal Candidate: - Strong expertise in Python programming - Efficient in diagnosing and resolving issues - Prior experience with automation scripts is a plus Please include your debugging approach and any relevant projects you've worked on in your proposal.

    $156 Average bid
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    34 bids

    I need a skilled developer to complete the integration of the Amazon Selling Partner API (SP-API) into my CodeIgniter website. The primary functionality required is product listing management, specifically to send my inventory of posters and canvases to Amazon's Sellers account. just need to add code in add product function and post data in Amazon for create product Key tasks will include: Finish Amazon SP-API integration Ideal skills for this project: - Proficiency in CodeIgniter and PHP. - Prior experience with the Amazon SP-API. - Strong problem-solving skills to troubleshoot any issues that may arise during the integration. The goal is to have a seamless connection between my website and Amazon's platform to streamline my product distribution.

    $203 Average bid
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    19 bids

    Project Brief: HealthyChoices iOS App Development Objective: To create an iOS application, HealthyChoices, that enables users in the USA to make healthier grocery shopping decisions by scanning food products, analyzing ingredients, and providing information on chemical-free options. Scope of Work The developer will be responsible for building a fully functional iOS app that includes barcode scanning, a product database integration, health scoring, alternative suggestions, and a clean, intuitive user interface. This project is for an iOS-only app, and it should be optimized for iPhones. Core Features 1. Barcode Scanning • Objective: Allow users to scan barcodes to retrieve product information. • Requirements: Integrate a barcode scanning library (such as AVFoundation). &b...

    $2398 Average bid
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    88 bids

    I'm in need of a professional who can assist me in utilizing the API to fetch BBR (Building and Property Register) ownership data from a specific property address. As a registered user, I find it challenging to navigate the system. Du skal være dansk da vi skal kunne kommunikere sammen løbende Key Requirements: - API Integration: The freelancer should have significant experience and skills in connecting with APIs and retrieving data accurately. - Data Filtering: The ability to filter and extract specific ownership details is crucial. The required fields include: Owner name, Property size, building type, and vurdering fra vurderingsstyrelsen. - XML Formatting: The retrieved data needs to be in XML format, so familiarity with this will be advantageous. I look forward to...

    $783 Average bid
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    63 bids

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

    $795 Average bid
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    29 bids

    Lo primero que se necesita es poder descargar ventas de todo el 2024 de una cuneta del sii con el acceso. Y que apretando un boton, se puedan actualiar automaticamente. Y mostrarlas en un listado con la informacion que contenga. Este es el primer trabajo de varios, se busca poder entregarle trabajos de largo plazo. Se necesita tener experencia previa en este trabajo.

    $198 Average bid
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    4 bids

    Desarrollo de una plataforma de fidelización de billetera digital Buscamos un desarrollador experimentado para la creación de una plataforma de fidelización similar a Captain Wallet y Esta plataforma permitirá a las empresas personalizar programas de fidelización y promociones a través de una tarjeta de billetera digital, integrándose perfectamente con Apple Wallet y Google Wallet. Integración de Billeteras Digitales - Soporte para Apple Wallet y Google Wallet - Generación de tarjetas digitales - Códigos QR para descarga directa Notificaciones Push - Envío de notificaciones automáticas - Personalización de mensajes promocionales - Segmentación basada en el comportamiento del cliente Capta...

    $3938 Average bid
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    59 bids

    CONSTRUÇÃO DE UMA API de comunicação entre APPSHEET E GOOGLESHEET E DJE

    $63 Average bid
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    2 bids

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