API Development projects — HireLancer archive

ID / Date Listing

Build New Site Features

I’m looking for a developer who can step in and extend the functionality of our existing website. The immediate focus is on adding brand-new features rather tha...

HL-40335251

Next.js Migration & Supabase Integration

My current React application already runs smoothly with Firebase Auth, but I now need the whole codebase migrated to Next.js so I can tap into simplified server...

HL-40335250

Library App & Admin Panel

I need a solid yet lean first release of a management system for my study library, “Pragati Abhyasika”. The scope covers an Android application and a web-based...

HL-40335128

Fix Formulation Filter Deduplication Bug

I maintain a JavaScript/Node.js price-collector that scrapes several e-commerce sites, stores the results, and feeds them to the frontend. Most filters behave,...

HL-40334941

Chipchap to Boukchap Platform Transformation

Project Proposal: Transform Chipchap Platform into Boukchap (Webapp, Admin Panel, and Mobile App) Project Overview We are looking for an experienced full-stack...

HL-40334926

Polymarket Arbitrage Bot Development

I'm looking for a skilled developer to create an automated trading bot for Polymarket. The bot should be able to perform arbitrage trading across multiple crypt...

HL-40334819

Flutter Social Network Mobile App

**Join Our Fast-Growing App Team as a Flutter Developer!** Hey Flutter pros! Are you great at finding and fixing code problems? Do you love making apps run perf...

HL-40334693

Repair Server-Side Session Authentication and code structure refactoring.

My browser-based idle game runs on a Java back end with a TypeScript front end, but the code is tangled and the authentication layer is falling apart. Players c...

HL-40334704

Supabase Expert for basic campus-based App

**ONLY developers who can complete this in ₹4,000–₹8,000 budget should place a bid** We are building a **closed social ecosystem (campus-based app)** with featu...

HL-40334710

Web Automation Bot Development - 29/03/2026 London based

Project Brief I need a bot to automate a multi-step B2B lead generation pipeline across several web applications. The bot’s primary function is to discover comp...

HL-40334635

a hands on supabase developer

**Backend Developer (Supabase + Flutter) — Matchmaking & Scoring System** We are building a closed social ecosystem combining social feed, anonymous interaction...

HL-40334529

MERN Full-Stack Technical Lead Needed

Senior Full-Stack Integrator / Technical Lead JOB TITLE: Senior Full-Stack Integrator / Technical Lead LOCATION: Remote EMPLOYMENT TYPE: Independent Contractor...

HL-40334427

Comprehensive Sustainability Assessment Software

The software should capture and analyze all key sustainability factors related to event planning and execution, including: Car usage and ground transportation e...

HL-40334477

Automate .NET web Form submission

I have a transaction form running on a .NET-based site that needs to submit itself automatically once all order details have been populated. Manually clicking t...

HL-40332010

Custom Web CRM: Sales & Inventory

I’m replacing a patchwork of spreadsheets and separate tools with a single, web-based CRM that is built specifically around our Sales and Inventory departments....

HL-40334236

Dimension-Based SketchUp Scaling Plugin

I need a custom SketchUp extension that lets me select any 2D shape or full 3D model and instantly resize it to exact target dimensions, rather than relying on...

HL-40334261

Backend for Social App Points + match making system also integrated in it

**Backend Developer (Supabase + Flutter) — Matchmaking & Scoring System** We are building a closed social ecosystem combining social feed, anonymous interaction...

HL-40334273

Developer Web Independen Dibutuhkan

Proyek ini memerlukan seorang programmer web yang mampu bekerja mandiri dari perencanaan hingga rilis produksi. Saya membutuhkan aplikasi web lengkap—termasuk p...

HL-40334160

Backend for Social App Points

I already have the full mobile-first UI finished; what is missing is a production-ready backend that lets the app feel alive. The core of the job is building a...

HL-40334191

Unity C# EtherCAT Servo DLL

I already have an EtherCAT X5_7S drive paired with an AC servo motor running on a Windows PC that also hosts my Unity project. What I am missing is a native bri...

HL-40334205

Stock Scalping Algorithm for Interactive Brokers - 29/03/2026 11:11 EDT

I need a small, fast‐executing program that scalps U.S. stocks through Interactive Brokers (IB). The core logic should enter and exit positions within minutes,...

HL-40334086

تصميم موقع C2C باستخدام Java/Spring

الملخص التنفيذي هذا التقرير يقدّم رؤية شاملة لتصميم وتنفيذ موقع ويب نموذج C2C (مستخدم-إلى-مستخدم) باستخدام Java/Spring Boot للجانب الخلفي، مع واجهة أمامية ويب (...

HL-40333952

API-Based React Native App Development

**Project Title:** React Native Mobile App Development for Existing Website (API Integration) **Project Description:** I am looking for an experienced **React N...

HL-40333964

Polymarket Bot Development

I'm looking for a skilled developer to create a Polymarket bot with the following functionalities: - Automated Trading: Execute trades based on predefined strat...

HL-40333969

RemoteDevs

Quero lançar um marketplace completo – front-end e back-end – onde qualquer pessoa possa cadastrar, negociar e vender ideias com a tranquilidade de que não have...

HL-40333977

E-Money Exchange Website Build

I need a straightforward e-money exchange website built from scratch. The first release will handle USD-to-USD transfers only, yet it still must show live rates...

HL-40333880

Integra ERP con Shopify

Buenas tardes, Vendo productos electrónicos y ya los tengo catalogados en mi ERP empresarial; ahora necesito que esa misma base de datos viva también en mi tien...

HL-40333806

Serve tecnico FullStack JS costriure un Gestionale Annunci senza chiavi API SOLO PER CHI PARLA ITALIANO AL TELEFONO DI FREELANCER NO PAKISTANI NO INDIANI SI NECESITA DI CHI PARLA E CONOSCE LA LINGUA ITALIANA . -- 2

Ho bisogno di un tecnico che sappia costruire un gestionale JavaScript FullStack che si colleghi alla piattaforma che già utilizzo per gestire vari siti di inco...

HL-40333818