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 176,772 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 176,772 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

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    23 jobs found

    Summary I'm in the process of planning a fully automated trading bot for crypto and/or stock markets. While I won't be doing the coding myself, I’m managing this as a serious project and want to get the architecture and roadmap right from the beginning. I'm looking for an experienced consultant who has built or worked on similar trading automation systems and can help me understand the best way to approach the project from both a technical and strategic perspective. This is not a coding task — it’s a consultation to plan out the right tools, technologies, and structure for the project before hiring developers. What I’d Like to Discuss: What programming languages and technologies are most commonly used for trading bots (and why)? How to connect the...

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    I need an automation system for WhatsApp to streamline delivery inquiries. Key Requirements: - Respond to customer inquiries using custom responses based on keywords. - Collect user feedback through automated prompts. - Provide predefined answers for sea freight and air freight inquiries. Ideal Skills: - Experience with WhatsApp Business API - Proficiency in automation tools (e.g., Zapier, Integromat) - Strong understanding of keyword-based response systems - Familiarity with logistics and freight terminology

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    8 bids

    I'm looking for someone to help me set up to connect with my Discord server and manage my Discord permission settings. Key Tasks Include: - Creating 1-2 subscription products on Whop - Setting up payment gateways, creating subscription tiers, and managing user subscriptions - Configuring access permissions for Discord bots (using free options) - Setting up basic channels and role permissions. Channels are created, but need organization and refinement Ideal Skills and Experience: - Experience with - Familiarity with Discord server management and permissions - Knowledge of setting up payment gateways - Ability to create and manage subscription tiers

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    10 bids

    I need a skilled web developer to build a frontend website (Website B) that replicates login/register functionality of an existing platform . I own Website A's backend and its API — but I will not be sharing backend code or direct access. You will build Website B using a frontend framework (React, Vue, or standard HTML/JS) All API interactions should go through a custom proxy server you will set up to handle CORS restrictions. What You Will Do: Frontend Development (Website B) Clone or redesign the login/register pages based on a reference (provided) Ensure responsive, modern layout using Bootstrap, Tailwind, or equivalent Handle form validation and basic UI logic Create Proxy Layer (Node.js or PHP preferred) Build a proxy server that receives frontend requests (e.g.,...

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    53 bids

    I run a small winery in Niagara-on-the-Lake and need a freelance Power BI consultant to set up and maintain our reporting dashboards. We currently use WineDirect as our POS and will be migrating to Commerce7 in November. Our data needs are straightforward, primarily involving exported columns and simple pivots. Key Requirements: - Sales reports, inventory management, KPI dashboards, and forecasting - Integrate data from WineDirect, Commerce7, Excel/CSV files, and APIs Ideal Skills and Experience: - Proficient in Power BI - Experience with WineDirect and Commerce7 is a plus - Strong data integration skills - Ontario-based (remote is fine) - Available to start ASAP - Open to an ongoing retainer arrangement Looking forward to your expertise!

    ₹2225 / hr Average bid
    Local
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    2 bids

    Job Post: Integrate Claude AI with Apify for Seamless Actor Interaction Project Title: Seeking Developer to Connect Claude AI with Apify Platform via MCP Project Description: We are looking to enhance our workflow by integrating our Claude AI account with the Apify platform. The primary goal is to enable Claude to act as a natural language interface for interacting with Apify actors. This will allow us to trigger Apify actors, send them inputs, and receive their results directly through conversations or interactions within Claude. We envision a system where a user can, for example, ask Claude to "Run the Apify actor 'my-web-scraper' with the URL '' and summarize the results." Claude would then interface with the Apify platform (likely via the Model Context ...

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    76 bids

    Project Description: I’m looking for an experienced developer to build a Telegram bot that can automatically recognize and extract data from both text messages and screenshots. The bot will store these details in a predefined “data scheme” within a database. Additionally, the bot should have a “learning” feature based on corrections, continuously improving its accuracy in interpreting screenshot content. Scope of Work: 1. Message Processing - Reading data from text messages and screenshots within the chat. - Organizing collected information into a predefined “data scheme” (Date, Amount, Transaction Description, Transaction Direction, Payment Method, etc.). 2. Saving the Data Scheme to a Database - Implementing the saving of extracted data to a da...

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    81 bids
    UDesign With AI
    4 days left

    UDesign – AI Design Companion Requirement Specification Document 1. Over view UDesign is an AI-powered design assistant t hat enables users to command and generate UI designs using natural language. Inspired by tools like UXPilot and UiZard, it suppor ts Figma integration, connects to a design system, and allows seamless design-to-code translation. It is a standalone tool t hat accepts LLM API keys to operate independent ly. 2. Core Features 2.1. LLM API Key Integratio b Users must be able to input and store t heir own LLM (Large Language Model) API key> b The tool must suppor t API key management and encr yption> b Compatible wit h OpenAI and ot her common LLM APIs. 2.2. Standalone and Command-based Operatio b No dependency on ot her platforms for core functionality> b User...

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    41 bids

    Project Title: Python Developer Needed for Automated Options Trading Strategy using Dhan/Angel One API Project Description: I have a ready intraday options buying strategy based on price action. I want to automate this strategy using Python. The key features and requirements are: Strategy Highlights: Only ATM CALL option buying (CE&PE) Entry based on price action logic (I will explain) Fixed trading windows: 9:15 AM – 12:00 PM and 1:00 PM – 3:00 PM Entry logic, Stop Loss, and Trailing Stop Loss must be coded Execute trades via Angel One API Proper logging and error handling Basic UI or console dashboard to monitor trades is a plus Developer Requirements: Experience with Indian brokers' APIs ( Angel One) Strong Python skills Knowledge of options tradin...

    ₹974 / hr Average bid
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    15 bids

    I need an API that processes an image of a dilapidated property or a 3D scan card. The API will generate several outputs to assist in property renovation. We also need a Flutter app that connects to this API and displays all output information. The application will be deployed on Android and iOS. The API should: - Take an input image (JPEG/PNG) - Generate a renovation to-do list from the image - Apply image enhancement filters (please specify focus, e.g., details, brightness, noise) - Automatically add furniture to the image - Output a new image with added furniture - Provide a purchase catalog for necessary items - List local craftsmen in the property's city - Generate a repair estimate The ideal candidate should have: - Experience in API development - Proficiency in image processi...

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    182 bids

    I'm looking for an experienced Gohighlevel developer to help with custom dashboards and API integration with other platforms. Requirements: - Create custom dashboards tailored to my needs - Integrate Gohighlevel with at least two other platforms via API Ideal skills and experience: - Proficiency in Gohighlevel - Strong API integration skills - Experience with custom dashboard development - Familiarity with various platforms (CRMs, e-commerce, etc.) Rest You Can Check Work scope you can check in description attached below

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    17 bids

    Project Description: I'm looking for a developer to help build a custom WA chatbot for a client (motorcycle garage) that can read and write data from his locally installed ERP system. The ERP stores its data in .DBF (dBase/FoxPro) files on a Windows PC, not cloud-based. The bot should be able to query specific information (like customer history, inventory status, repair records) and also push updates, such as new service records or part usage. Key Goals: - Read customer, vehicle, service, and inventory data from local .DBF files - Allow business owner to query the bot in natural language (e.g. “Which parts are running low?”, “What did we do on Avi’s Yamaha?”) - Must be a WA bot - The bot should answer using data from the DBF files - Allow input from the ...

    ₹1626 / hr Average bid
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    77 bids

    I'm seeking a skilled frontend developer to design a lead-generating website for my HVAC company using teleporthq.io. The site will be linked to a headless WordPress backend. Key Requirements: - Modern and minimalist design - Services overview on homepage Ideal Skills and Experience: - Proficiency in - Strong portfolio in modern minimalist web design - Experience with headless WordPress integration - Familiarity with HVAC industry standards and practices Pages Needed: -Home -About us - Products - Services - Select your Installer/Service Provider - Schedule your Installation - HVAC Information - Investors - Contact us i already have the website layout / wireframe done in figma only people with experience in this field will be accepted for the job. Thank you.

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    71 bids

    1. Objective Build a Figma plugin that leverages a Large Language Model (LLM) to generate UI designs based on natural language prompts, using components and styles from an existing Figma design system. The plugin should be built using TypeScript and HTML. 2. Key Features 2.1 LLM-Powered Design Generation Prompt-Based UI: Text input field where users describe the design they want (e.g., “Create a mobile signup form with branding”). LLM Integration: Connect to a supported LLM (e.g., OpenAI, Anthropic). Convert user input into structured UI layouts (e.g., JSON or design DSL). Design System Integration: Automatically use components (buttons, inputs, cards) and styles (colors, typography, spacing) from a linked Figma design system file or library. Map generated design structure t...

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    7 bids

    I'm seeking a seasoned Unity Developer with over 5 years of experience. You will be working on a massive project alongside backend developers. Your main focus will be API architecture and implementation, specifically using REST APIs for third-party service integration. Key Responsibilities: - Design and implement game progression and difficulty systems. - Integrate AI technologies. - Implement REST APIs for third-party service integration. - Work with JSON and handle API calls. - Build and optimize WebGl versions. Ideal Skills and Experience: - 5+ years in Unity development. - Strong expertise in REST APIs. - Proficient in JSON and API calls. - Excellent communication skills in English. (Removed by Freelancer.com Admin)

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    65 bids

    Project Summary: I’ve purchased the Extended License of the Framecast AI SaaS headshot generator script. I need help deploying it on my own custom domain (no Vercel subdomain), configuring it fully, and customizing the user flow to behave more like (which allows customers to pay, upload photos, and receive results — without needing to interact with a “train model” backend). ________________________________________ Your Tasks: 1. Deploy the full Framecast AI script on my hosting (e.g. Hostinger, DigitalOcean VPS, or equivalent — I’m open to recommendations). 2. Set up required services and integrations: o Astria (AI model training & inference) o Supabase (database & auth) o Resend or SMTP email (email alerts when headshots are ready) o Stripe or ...

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    49 bids

    Location: Remote / India Type: Full-time (Contract or Founding Team Role) Experience: 5–10 years (DevOps + Backend) About the Role: We are building a global-grade Email Service Provider (ESP) platform — reliable, secure, and optimized for inbox deliverability — to compete with the likes of MXroute and Inframail. We’re looking for a hands-on Lead Engineer / Technical Architect to design, build, and launch the complete infrastructure and customer-facing platform. You’ll work closely with the founder to own the technical roadmap, choose the right stack, and lead all core engineering efforts from Day 1. Responsibilities: Architect and deploy a scalable, secure email hosting infrastructure using Postfix, Dovecot, Rspamd, and Docker (Mailcow or cust...

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    12 bids

    Job Title: Full Stack Developer – Email Marketing SaaS Product Location: Remote (Bangalore, Chennai or Within India) Type: Full-Time Experience: 3–7 years About the Role: We're building a next-generation Email Marketing SaaS platform that enables businesses to launch, manage, and analyze email campaigns directly through their Gmail, Outlook 365, or custom SMTP/IMAP accounts. As a Full Stack Developer, you will play a critical role in building and scaling the entire product — from the user-facing interface to backend services and integration with email infrastructure. This is an exciting opportunity to join early, take ownership, and help shape the future of email marketing automation. Key Responsibilities: End-to-End Development: Design, develop, and maintain a ...

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    25 bids

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

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    29 bids

    Estoy en la búsqueda de un profesional con experiencia en la implementación y personalización del CRM Kommo. Se requiere conocimiento para la configuración inicial, integraciones, automatizaciones y optimización de flujos de trabajo dentro del sistema, adaptándolo a las necesidades específicas. Responsabilidades: -Realizar flujos efectivos dentro de Kommo. -Configurar y personalizar pipelines, campos, etiquetas, tareas y usuarios en el CRM. -Implementar integraciones con otras plataformas (como WhatsApp, correo electrónico, telefonía, entre otros). -Diseñar y aplicar automatizaciones que mejoren la productividad del equipo de ventas. -Capacitar a los usuarios en el uso efectivo del sistema. -Dar soporte técnico y...

    ₹1968 / hr Average bid
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    17 bids

    Hola, estoy desarrollando un sistema de fidelización de clientes en FlutterFlow, el cual se conecta mediante una API a una plataforma de eCommerce (Tiendanube). Necesito implementar un sistema de notificaciones automáticas por email y WhatsApp. Además, quiero agregar una sección dentro del panel de administración (dashboard) donde los clientes puedan gestionar y pagar su membresía.

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    Ciao sono una fisioterapista e vendo un protocollo online Durante le videochiamate di vendita (su Google Meet), ho bisogno di ricevere in tempo reale dei suggerimenti su cosa dire, in base a quello che dice il paziente. L’idea è questa: 1. Utilizzare per trascrivere in diretta le parole del paziente. 2. Inviare ogni frase o blocco di testo a ChatGPT tramite API. 3. Ricevere da ChatGPT una risposta consigliata da dire al paziente, da visualizzare subito (es. in una chat Telegram, un pop-up o Slack). Lo scopo è aiutarmi a gestire meglio le obiezioni in tempo reale e dare risposte persuasive anche sul piano emotivo. Io non ho competenze tecniche, quindi avrei bisogno che mi impostassi tu tutto, oppure che mi dicessi cosa comprare o installare per usare questa auto...

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    8 bids

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