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 175,110 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 175,110 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

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    36 jobs found

    I'm looking for a skilled developer who can create a Telegram bot for me. This bot should be able to post animated premium emojis with inline buttons. Key Features: - The inline buttons should link to a URL - The bot should be interactive, with users communicating through commands - The bot should be capable of posting a variety of animated premium emojis Ideal Skills: - Proficient in Telegram bot development - Experience with animated and premium emojis - Strong understanding of URL linking and bot interactivity Please provide examples of previous Telegram bots you've created, particularly those involving emojis.

    $16 Average bid
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    3 bids

    I need a professional to integrate the Visanet payment gateway API into my e-commerce website. Here is the Visanet resource information and details: The integration should have the following functionalities: -Generate invoice -Create payment link for customers -Order confirmation and tracking - Recurring payments - Connection of invoice link to our Visa Card number to receive payments. -Admin Dashboard In addition to these features, I require the implementation of specific security measures to ensure a safe and secure payment process. This includes: - SSL encryption - Two-factor authentication Ideal candidates for this project should have extensive experience in API integration, particularly with payment gateways. A strong understanding of investment platform and e-commerce func...

    $165 Average bid
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    70 bids

    We are looking to develop a unique event photo-sharing platform that utilizes WhatsApp for photo uploads and event-specific galleries. It will allow event guests to easily join an event’s “channel” via WhatsApp, share photos, and view the gallery through a dedicated web link. Key Features: WhatsApp Integration: A single WhatsApp number where guests join events by messaging “join [eventcode]” (e.g., “join johnbirthday”). Ability for guests to send photos to this number, which are then stored in a gallery for that event. Backend Development: Secure backend to handle event management, user/guest registration, and photo storage. Automated photo sorting and storage (e.g., AWS S3 or Google Cloud). Database to store event details, guest participation, a...

    $262 Average bid
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    66 bids

    I've integrated the Google Gemini API into my website to automatically generate image metadata like titles, descriptions, and tags during image uploads. Initially, it worked fine, but recently I've been facing issues with uploading multiple images. Sometimes, only a few images upload, and at times, none at all. I need a professional to help me: - Diagnose and fix these upload issues. - Provide a permanent solution for smooth multiple image uploads. - Ensure the Google Gemini API integration works seamlessly again. The issue seems to be random, not limited to specific types of images. I have made some recent changes to my website's code, which may have impacted the API's performance. Therefore, a comprehensive understanding of website code modification and server confi...

    $20 Average bid
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    12 bids

    I need an algorithm developed for the Trading Technologies (TT) platform. The algorithm should allow for manual input and facilitate real-time trading decisions. please see following link: Key Requirements: - The algorithm should be responsive to user inputs and able to execute trades based on real-time decisions made by the user. - Prior parameters set by the user before execution should be taken into account. - The algorithm needs to be built to work with the TT platform, so familiarity with this platform is crucial. - Ideally, you should have experience with developing trading algorithms, particularly ones that incorporate manual user input. - Develop a user-friendly interface for easy manual input and tracking of trades. - Ensure the algorithm minimizes latency to capitalize on real...

    $2436 Average bid
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    I'm looking for a skilled developer to implement some customization to the API for my Shopify store. We have a use case where we want to reward points to a customer every time a unique NFC tag is scanned. Each NFC tag has its own web link that will need to tie to individual customer accounts. We need a developer to help us implement a "custom earning actions" with JavaScript SDK and API Access. This is the documentation Smile had provided us with for this project: Key Requirements: - Implementation of loyalty points management to enhance customer retention and reward loyal shoppers. - Setup custom earning actions through Smile API - Customization for referral tracking to efficiently monitor and incentivize customer referrals. - Modifications for seamless rewards rede...

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    108 bids

    I'm a small business owner based in Mumbai looking for a skilled professional with expertise in Google Sheets, Appsscript, and Doubletick.io. The primary focus of the project is developing and automating functions for lead generation, sales follow-up, appointment booking, field service delivery, billing & payment follow-up functions. Key Responsibilities: - Leverage integration and automation to enhance all the above processes. - Currently, we use Google Sheets as our database for all processes. Ideal Skills: - Demonstrated experience with Google Sheets and Appsscript. - Proven track record with or similar Whatsapp API integration with Google Sheets. - Prior experience in the automation of orders and appointment booking for field services. - Strong understanding of small busine...

    $310 Average bid
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    6 bids

    *Develop a secure and user-friendly web-based platform for managing VPS servers and client billing. *Must include client and admin dashboards with features for account management, service ordering, payment processing, and support ticketing. *Integrate automated provisioning and management for cPanel and custom VPS servers. *Essential to have robust billing functionality with support for multiple payment gateways, invoicing, and automated recurring billing. *The system needs to be highly secure and scalable to accommodate future growth. I'm seeking a skilled developer to create a comprehensive VPS automation and billing platform. This platform will be the core of my VPS hosting business, enabling me to efficiently manage servers, clients, and billing operations. *Key Features: *Secu...

    $133 Average bid
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    18 bids

    I need a calendar implemented on my Wordpress website. This calendar will be displaying concert events, integrated with Fourvenues API, a ticketing platform. Key Requirements: - The calendar should solely display concert events. - No email notifications are needed for users post event booking. - The calendar should be seamlessly integrated with the Fourvenues API. Ideal Skills: - Proficient in Wordpress development. - Experience with API integration, specifically with ticketing platforms. - Knowledgeable in creating event calendars on websites. Refrence:

    $505 Average bid
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    297 bids

    Please read completely before placing a bid ! Please bid only if you also plan to respond... Please someone who is interested in doing several projects Please make realistic offers and no fake offers where the price multiplies afterwards. Please keep in mind that changes can still be made during the testing phase ! I am looking for a talented web developer to launch a Usenet search engine website. This is a unique opportunity for someone with hands-on experience in building secure, efficient and user-friendly search platforms. Here's a snapshot of what's on my wish list: Skills and experience: - Knowledge of HTML (as stated, but ideally also Python, JavaScript or PHP). - In-depth knowledge of NNTP (Network News Transfer Protocol) - Good track record of creating well-documented,...

    $236 Average bid
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    89 bids

    I am looking to have a program created which automates trades on the I am looking for the code to login to polymarket and scan the market orders across all markets every second (ideally would be nice to be able to filter markets as well) to identify arbitrage opportunities. These are opportunities where the sum of the probabilities on each side of the bet is less than 1. If this is found, the code should simultaneously place market limit orders for equal amounts of shares based on the lowest number of shares available for one side of the bet as long as the funds allow for both orders to be filled. For example, say there is a football game between team A and team B. The market order shows someone is selling 100 shares of team A for $0.55 while at the same time there is also a market order ...

    $228 Average bid
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    25 bids

    I'm looking for a software or script that can compare Pinnacle in-play odds with bet365 in-play odds, specifically for the football market. Key Requirements: - The software/script should focus on comparing only 5 specific markets. (Exact markets to be discussed) - It should display the compared odds in a user-friendly manner. - The software/script should be able to run independently and also provide an option for integration with other systems. - The software/script should offer real-time updates for the in-play odds. - Provide options to customize the comparison interface, such as theme and layout. - Implement a notification system to alert users when favorable odds are available. Ideal freelancer for this project should have: - Strong programming skills with experience in develop...

    $521 Average bid
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    65 bids

    I'm in need of a seasoned developer who can create an email verifier application similar to MillionVerifier. This tool is intended for my existing business and must be capable of effectively validating email addresses in bulk. The application should be dependable and precise, with a user-friendly interface and a robust backend. Key requirements: - Experience in developing similar applications - Deep understanding of email verification methodologies - Ability to deliver a user-friendly interface and strong backend functionality Please include examples of your previous work related to email verification or similar projects. The project is urgent, and I would appreciate a swift turnaround.

    $1277 Average bid
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    17 bids

    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.

    $26 Average bid
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    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...

    $77 Average bid
    NDA
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    7 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 ...

    $380 Average bid
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    23 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...

    $145 Average bid
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    34 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...

    $403 Average bid
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    28 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...

    $2444 Average bid
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    9 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: -...

    $537 Average bid
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    51 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...

    $92 Average bid
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    19 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...

    $93 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

    $19 / hr Average bid
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    90 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

    $656 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...

    $366 Average bid
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    86 bids
    AI-Assisted Teacher Platform
    1 day 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

    $3182 Average bid
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    49 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...

    $12524 Average bid
    Local
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    55 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.

    $201 Average bid
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    23 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,

    $151 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.

    $158 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.

    $161 Average bid
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    41 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...

    $607 Average bid
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    37 bids

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

    $470 Average bid
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    29 bids

    Cześć, Potrzebujemy pomocy z integracją API systemu CRM z Webflow. Chcemy aby API wyświetlało dane zależnie od strony oraz dało się je filtrować. Posiadamy pełną dokumentację API.

    $182 Average bid
    $182 Avg Bid
    9 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.

    $122 Average bid
    $122 Avg Bid
    5 bids

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