API Development projects — HireLancer archive

ID / Date Listing

Urgent Next.js + Supabase Bug Fixes

Our live SaaS client portal is throwing critical errors and I need an experienced hand on it right now. Supabase Row-Level Security is behaving unpredictably—au...

HL-40248368

Make spring boot code working

Make spring boot code working https://github.com/opencellsoft/opencell-core?utm_source=chatgpt.com https://github.com/apache/ofbiz-framework?utm_source=chatgpt....

HL-40248200

Multilingual Travel confirmation and Website APIs

Project Overview Travel Confirmation Services (TCS) is a UAE-registered B2C platform providing legitimate travel confirmation documents for international visa a...

HL-40248130

Bespoke CRM for Insurance Team

Our 10-person insurance firm in the UK has outgrown spreadsheets and generic SaaS tools, so I need a fully tailored CRM that fits the way we actually work rathe...

HL-40248004

Next.js SaaS with Payment Integration

I’m building a modern SaaS web application and need a developer who can take it from repository setup to production in roughly one to two weeks. The stack is st...

HL-40248045

Virtual Stock Trading App Build

I want to build a mobile application that lets users practise stock trading with virtual money while following real-time market movements. The focus is strictly...

HL-40247910

Smart Grocery Price Comparison App

I want to give shoppers a simple way to know exactly where their weekly groceries will cost the least. The idea is straightforward: after each supermarket visit...

HL-40247932

Java User Data API

The project involves building a robust Java backend that exposes secure, well-documented APIs dedicated to handling user data. The service will receive, create,...

HL-40247803

Custom Offline Restaurant and Bar software

I run a busy restaurant-bar operation and need a tailor-made, keyboard-centric POS that works entirely offline. The application must be written from the ground...

HL-40247689

LARAVEL WHATSAPP INTEGRATION

Brief – Backend WhatsApp (Cloud API Meta) para Check-In / Check-Out multi-empresa 1) Objetivo Desarrollar un backend en PHP/Laravel en whatsapp.timhr.es que ges...

HL-40245714

Backend Engineer for Zeedeo Admin Panel Optimization -- 2

We’re hiring or an immediately delivery a backend engineer who can deliver quickly without compromising quality our APIs for our Admin Panel. Stack ( PHP, Node,...

HL-40247650

متجر الكتروني وتطبيقات جوال -- 4

مشروع: تطوير AI WhatsApp Agent لمنصة قطع غيار سيارات + نظام طلب تسعير ذكي + أتمتة كاملة + استهداف العروض + أتمتة محتوى السوشيال الهدف العام للمشروع بناء وكيل ذك...

HL-40247489

React App & Admin Upgrades

I need several focused enhancements to an existing React code-base so our customer app and the accompanying admin panel stay in sync and secure. The tasks are:...

HL-40247495

Next.js & Laravel Full-Stack Partner -- 2

I’m seeking a highly skilled developer with extensive experience in both Next.js and Laravel. You should have a deep understanding of performance optimization,...

HL-40247331

Web Attendance & Payroll System -- 2

I need a fully-functional, web-based application that brings together attendance, payroll, and statutory compliance in one place. Core scope • Time tracking mus...

HL-40247121

Web Attendance & Payroll System

I need a secure, user-friendly web application that handles both employee attendance and payroll from one dashboard. Attendance must capture clock-ins directly...

HL-40247350

Stock Data System

I need a small, reliable system that polls the Upstox API once a minute for roughly 500 equities and captures only one metric—Market Cap. Each pull should be wr...

HL-40247180

Android School E-Commerce App

I need a full-featured Android application that brings together a standard e-commerce storefront and a dedicated school dashboard. Parents should be able to bro...

HL-40247236

Full-Stack React App Development

1 admin password 3 notification 4 user address and city save in app and admin panel no delete after logout out 5 delete option in notification from admin panel...

HL-40247089

Android+iOS Task Management Suite

I want to launch a straightforward productivity suite centred on task management. The deliverable is a clean, intuitive mobile app that works identically on bot...

HL-40247149

IFC to Material Database Mapping Tool

Check Scope File for more details Project Award is not guaranteed Thank you

HL-40247158

App o Web de Fichaje Empresarial

Necesito desarrollar una aplicación web de fichaje que sirva como base para un nuevo modelo de negocio. La plataforma debe: • Operar exclusivamente en entorno W...

HL-40247172

Animal Adoption Website Development v3

We are building a lightweight web-based dashboard designed to increase visibility for animals in need of rescue, in several categories, such as Animals at Risk...

HL-40246832

Enhance Polymarket Trading Bot

I already have a functioning copy-trading bot connected to Polymarket, but it needs a stronger layer of risk management before I scale it any further. The first...

HL-40246696

AI Crypto Analysis Platform

I want to launch a web-based platform that applies artificial intelligence to cryptocurrency analysis, delivering clear, real-time insights for Bitcoin, Ethereu...

HL-40246703

CRM Portal Development

I'm looking to develop a comprehensive CRM portal. Key functionalities: - Contact Management: Organize and manage customer information. - Sales Tracking: Monito...

HL-40246491

Real-Time Shopify Order JSON

I’m looking for a developer who can give me a single, secure JSON endpoint that streams my Shopify order data in real time. The feed only needs to expose order-...

HL-40246499

Optimización y Nuevas Funciones -- 2

Trabajo con varias aplicaciones en producción construidas en Dart y Xcode y necesito apoyo continuado para dos frentes muy concretos: 1. Mejorar el rendimiento...

HL-40246513

"Blind-Phase" Conflict Resolution Clincial Trials Development

Request for Proposal: Lead Systems Architect & Software Development Team Project: "Blind-Phase" Conflict Resolution Research Infrastructure Overview: We are see...

HL-40246539

OBS Overlays & Driver Database Program

I need a custom-built application that pairs a lightweight database with dynamic overlays for an esports broadcast in OBS Studio. The core of the project is a r...

HL-40246449

Advanced Menu System Rebuild & Integration (Android, iOS, Dashboards)

Project Overview We have a live multi-business commerce application. We are looking for a senior-level professional team (not beginners) to rebuild and fully in...

HL-40246452

Senior Backend / Mobile Engineer – Audio Platform

PLEASE READ COMPLETELY PLEASE READ COMPLETELY PLEASE READ COMPLETELY We are building a monetized audio platform and need an experienced backend engineer who can...

HL-40246347

Airbnb VRBO Hosting Tools For Maximum Efficiency

This is not a project that needs done per say, but i like the fact that there can be software developed to make the hosting side easier and beneficial. I am pos...

HL-40246338

Integrasi Sistem Poin Pengguna - 20/02/2026 15:26 EST

Saya ingin menambahkan mekanisme poin/reward pada platform yang sudah berjalan agar pengguna mendapat insentif setiap kali mereka menyelesaikan tindakan tertent...

HL-40246414

Comprehensive Casino & Slots API

I’m ready to commission a robust, production-grade API that powers casino and slot games across web, mobile, and desktop channels. The service must expose endpo...

HL-40246210

Nexus-hub Feature Development

I’m expanding my prototype at https://nexus-hub-six.vercel.app and need three core modules completed: • Advanced user accounts and profiles – personal dashboard...

HL-40246128

Shoonya API Paper Trading Platform -- 2

I need a paper-trading platform that connects to the Shoonya API and lets my ten students practise live-market execution on NSE F&O and MCX futures only—no CE o...

HL-40246133

Supabase Sports Contest Builder

I already run a Supabase-powered sports analytics platform that pulls live odds through OddsAPI and hosts a functioning Pick Streak Survivor contest. Your job i...

HL-40246002

Develop Customized Rideshare Smartphone App

Need help to buildridehsare phone app. For driver and rider..on apple store and google play store 1. User & Identity Management • Rider registration and secure...

HL-40246006

Flask Data Entry Site Build

I need a small, self-contained web application built with Flask that lets users submit three fields—Name, Mobile, and Email—through a clean, responsive form. Su...