API Development projects — HireLancer archive

ID / Date Listing

Java Spring Codebase Upgrade

I’m migrating an older Java backend—built on legacy Spring and Hibernate—into a fresh Spring Boot 3 project so the stack is fully modern and future-proof. The f...

HL-40279661

Shopify Carrier Service Shipping Rates Developer Needed (timeouts, caching, fallback logic)

I'm using Shopify's Carrier Service (dynamic shipping rates) and my shipping provider's API occasionally responds in 12+ seconds. Shopify has strict timeouts, s...

HL-40279666

Debugging & Optimizing RAG Pipeline for Radiology Chatbot

Debugging & Optimizing RAG Pipeline for Radiology Chatbot We have a production RAG (Retrieval-Augmented Generation) chatbot for radiology built with Python/Fast...

HL-40279421

Desarrollo Base de Clientes

Necesito una base de datos que centralice toda la información de mis clientes. Quiero poder: • Registrar los datos básicos de cada cliente y actualizar su histo...

HL-40279312

Serve tecnico FullStack JS costriure un Gestionale Annunci senza chiavi API SOLO PERSONE ESPERTE SOLO PER CHI PARLA ITALIANO AL TELEFONO DI FREELANCER -- 3

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-40279350

Full Stack Web App Development

I need a full-stack web application built from concept to live deployment. This includes planning the architecture, designing an intuitive responsive interface,...

HL-40279366

Courier & Client Delivery App

I need a complete, Turkish-language “instant delivery” solution that runs on both iOS and Android. Everything must sit on a single backend so I can manage users...

HL-40279231

Gamma-Vanna Options Screener & Bot

I need an options screener that ranks option chains by their gamma and vanna exposure so I can quickly spot names with outsized dealer flows. The first mileston...

HL-40279104

Supabase Backend for Scalable Business Platform -- 2

I already have a working web front-end, but the data layer behind it is still a proof-of-concept. I now need a production-ready Supabase backend that can confid...

HL-40278957

Multi-Tenant Logistics System Development

I need a full-stack developer, or team, to build a multi-tenant logistics management system built on Angular 14 for the front-end, .NET Core for the API layer,...

HL-40279001

All-Platform Service Marketplace App

I’m building a full-featured professional marketplace that brings together three distinct verticals—freelance services, consulting services and on-demand home s...

HL-40278845

Radio Streaming App Android iOS

Quero lançar um aplicativo de rádio que funcione tanto em Android quanto em iOS e seja comandado por um painel web. Enviarei um modelo já existente para servir...

HL-40278913

WordPress and SuiteDash-Based Development

This project will create a complete coaching ecosystem that merges a WordPress front end with a structured SuiteDash based coaching platform. The purpose is to...

HL-40278758

Serve tecnico FullStack JS costriure un Gestionale Annunci senza chiavi API SOLO PERSONE ESPERTE SOLO PER CHI PARLA ITALIANO AL TELEFONO DI FREELANCER -- 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-40278765

Uber-style taxi service App. Prefer Bengaluru, India based company/freelancer & willing to meet in Bengaluru or Kuala Lumpur

I’m ready to bring a full-featured, Uber-style taxi service to life and need a developer (or small team) who can take the project from concept to launch on both...

HL-40278497

We are building a SaaS platform called WebOpen AI Search Visibility.

The platform monitors how brands appear in AI search engines (ChatGPT, Gemini, Perplexity). We need development for: • SaaS dashboard • AI analysis engine • pro...

HL-40278509

Library QR Attendance Tracking Integration

I already have a production-ready library management platform running on a Next.js front end with a NestJS API, containerised with Docker and deployed on AWS (f...

HL-40278361

Admin Slot Development

I need a secure, easy-to-navigate admin slot designed specifically for our system administrators. The slot will plug into our existing application stack (I’ll s...

HL-40278353

Video editor for social media, long form and short form content

Our company is seeking an experienced freelance video editor to help produce high-quality content for social media and digital platforms. This is an ongoing opp...

HL-40278200

Fix Bug in My Telegram Bot (Python)

Description: I have a Telegram bot that is already built, but it currently has a bug and is not working properly. I need an experienced developer to quickly ide...

HL-40278224

Comprehensive OTA Website Development

I’m building a full-scale online travel agency similar to MakeMyTrip or Goibibo and need a developer who can take the project from concept to launch. The site m...

HL-40278286

Node.js AirPay Payment Integration

I’m adding AirPay to the existing Node.js backend and need a clean, production-ready module that handles straight-forward payment processing. The service must a...

HL-40278135

NSE R1/S1 Breakout Trading Bot

I’d like you to turn my daily-pivot R1/S1 breakout idea into a fully automated Python program that plugs straight into the Dhan API. The very first thing I want...

HL-40278007

B2B Project Posting Module

I need a self-contained module added to our custom-built B2B portal that lets clients post their project requirements and makes those posts visible to all regis...

HL-40278077

S/4 HANA SD Consultant Needed

I run a project with a large-scale, custom integration to SAP S/4 HANA and now need an expert who knows the Sales and Distribution area inside out. The technica...

HL-40278088

AI Multi-Platform Streaming App

I’m building an entertainment app that streams video on Android, iOS, LG webOS, and Samsung Tizen. The core experience centres on both live streaming and an on-...

HL-40277928

Money-Earning Mobile App Build

I want to launch a streamlined mobile app that lets users earn real money by completing surveys and watching ads. The flow is straightforward: a new user lands...

HL-40277949

AI Image & Video Detector Website – Detect AI or Natural Content

I want a clean, responsive WordPress site that lets visitors upload an image (JPG / PNG) or video (MP4 / AVI) and instantly checks whether the file is AI-genera...

HL-40277761

FullStack JS Gestionale Annunci senza chiavi API SOLO PERSONE ESPERTE SOLO PER CHI PARLA ITALIANO AL TELEFONO DI FREELANCER -- 5

Ho bisogno di un gestionale JavaScript FullStack che si colleghi alla piattaforma che già utilizzo per gestire vari siti di incontri e consenta, con un solo cli...

HL-40277622

ERPNext-WhatsApp Sales Integration

We have a new mobile number and want to set up WhatsApp Business API directly with Meta (no third-party BSPs) and connect it with our ERPNext instance hosted on...

HL-40277631

Fix & Ship Mobile App Updates (ASP.NET Core, Flutter, PostgreSQL, Firebase)

We need a senior developer (freelancer or agency) to fix critical issues and deliver production-ready updates for a mobile-first app. Tech stack - Backend: ASP....

HL-40277452

FullStack JS Gestionale Annunci senza chiavi API SOLO PERSONE ESPERTE SOLO PER CHI PARLA ITALIANO AL TELEFONO DI FREELANCER -- 4