API Development projects — HireLancer archive

ID / Date Listing

HL-40207900

Secure QR Token Authentication

I’m overhauling the sign-in flow for my private messaging product and need an engineer who can implement a rock-solid, token-based authentication system. The go...

HL-40207933

Loan Origination System Development

I’m looking to have a commercial-grade loan origination system built that centres on risk assessment and underwriting. The platform must comfortably process bot...

HL-40207790

DigitalOcean MVP + MySQL Import

I need a developer to quickly deploy an MVP on a DigitalOcean droplet. I already have: Tailwind HTML UI (prototype ready) MySQL database backup that needs to be...

HL-40195893

Auto-Local Currency Integration

My site is a custom PHP/HTML/CSS/JS build and right now every price shows in one fixed currency. I want those figures to switch automatically to the visitor’s l...

HL-40207687

Membership-Based Training Video Portal

I'm looking for a web developer to create a simple portal for training videos. The portal should have the following features: Access Control: - Members-only acc...

HL-40207339

Enhance Features for React & Laravel E-Commerce Site

We have an already running e-commerce website built with React + Next.js on the frontend and Laravel on the backend. We are looking for an experienced full-stac...

HL-40207378

Need Help for WhatsApp API Integration & Facebook Verification

I need an end-to-end setup of the WhatsApp Business API for my company. The plan is to work with the official WhatsApp API (that’s the BSP route I’m leaning tow...

HL-40207410

Localizing Coordinates in a Building

Localizing Coordinates in a Building You are given a simple representation of geometries of buildings and floors. Your task is to implement a frontend that acce...

HL-40207226

Teamsbot mit Gedächtnis

### Projektbeschreibung für Freelancer.com (kurz & klar) **Titel:** Microsoft-Teams-KI mit revisionssicherem Langzeit-Protokoll (L0/L1/L2) auf Azure --- ### Zie...

HL-40207294

Copy writting

I’m ready to turn my idea into a fully-functional Android application and need a developer who can guide the process from concept to Google Play release. At thi...

HL-40207297

Copy writting -- 2

I’m ready to turn my idea into a fully-functional Android application and need a developer who can guide the process from concept to Google Play release. At thi...

HL-40207309

Spring CSRF & PKI Integration

I’m building a Spring-based service router and need robust CSRF protection on all API endpoints. The idea is to leverage Public Key Infrastructure so that every...

HL-40207132

TradingView iOS Alert Integration

Here’s what I need built: A tradingview script to create a push notification the notification is to be generated at the user defined time/times at the time the...

HL-40207166

Electron plasma

I need an application that replicates the end-user experience of Google’s Gemini while letting me supply my own API key. Once the key is entered, every feature...

HL-40206980

Real-Time Coding Duel Blueprint

I’m planning an interactive, data-structures-and-algorithms-focused coding duel platform and I need a crystal-clear design and architecture proposal before any...

HL-40206983

Senior Backend Engineer – Large-Scale Transaction Systems - 26/01/2026 08:16 EST -- 2

Engagement type: Freelance / Contract Duration: Initial 3–6 months (extension possible) Location: Remote Start: ASAP Project overview We are looking for a senio...

HL-40206802

Software acquisizione dati multisorgente

Devo sviluppare un’applicazione desktop che acquisisca in modo continuo i dati provenienti da tre diverse interfacce – RS232, USB e LAN – e li registri in un ar...

HL-40206839

Same-Day Locker Shipping Integration

I run a Shopify store and need the checkout flow to offer my customers a true “one-day” option: they either pick up the parcel at a designated postal centre or...

HL-40206845

Cross-Platform Watermark-Free Downloader

I want a single code-base app (React Native or Flutter is fine if it meets Apple and Google policies) that lets my users save any public video or audio they enc...

HL-40206864

Web-Based SaaS for Shipment Management

Importer SaaS – Developer Quick Specification (Web) 1. Overview Product: Importer SaaS (MVP) Platform: Web (FlutterFlow) (discussable) Backend: Supabase (Postgr...

HL-40206868

Full-Stack Web Automation & Data Collection Platform (AWS, Node.js, React)

We are seeking an experienced development vendor to build a production-grade web automation and data collection platform. This is a fixed-price project with a d...

HL-40206697

PHP Developer for Debugging and Fixes

We need an experienced PHP developer to make a few tightly scoped fixes on a live, legacy PHP frontend. The work is focused on debugging auth flow and a 401 API...

HL-40206725

Marketplace Scraping

1 Introduction and Purpose This document is issued to invite qualified development vendors to submit a fixed-price commercial proposal, together with an annual...

HL-40206691

Full-Stack C# ASP.NET Social Platform in Arabic

I am building a fully-featured social networking platform from the ground up and need a developer who can own both the server-side and front-end work. The stack...

HL-40205985

AI-Driven CRM Web Apps for home care agency - NO CODING

I need a small suite of web-based CRM platforms built from the ground up, each powered exclusively by Emergent AI. Every app in the suite must be built using ON...

HL-40205892

React Home Services Marketplace Build

I need a React-based web app that lets homeowners post one-off jobs—plumbing, electrical, landscaping, and similar tasks—and instantly see nearby tradespeople w...

HL-40205618

Node.js AI Voice Translation Center

PROJECT DESCRIPTION Context I'm looking for an experienced developer to build an intelligent call center system with automatic real-time voice translation. The...

HL-40205634

Fraud Detection Platform - Extraction Accuracy & Expansion

Fraud Detection Platform - Extraction Accuracy & Expansion Project Title **Senior Python Developer Needed for Document Fraud Detection Platform (Ongoing)** ---...

HL-40204184

Product Based MLM Website Development

I’m building a full-fledged, product-based MLM system and want it right the first time by someone who already understands the day-to-day realities of network ma...

HL-40205678

Secure Contest Voting Assistance

I need a reliable partner who can quietly deliver a few hundred votes for an online contest I’m entered in. Each vote must originate from a unique IP address—ro...

HL-40205682

Custom Verotel Gateway for WordPress Paid Membership Pro - 04/02/2026 20:13 EST

I need a developer who knows WordPress, Paid Memberships Pro, and Verotel FlexPay inside-out to build a bespoke PMPro payment gateway. The goal is seamless subs...

HL-40205569

Piattaforma Web Gestione Dispositivi

TRADUCI IN INGLESE DOCUMENTO TECNICO – GESTIONALE DISPOSITIVI USATI & RICONDIZIONATI 1. Descrizione generale del progetto Realizzazione di un gestionale web-bas...

HL-40205371

Convert Pascal Application to Web

I maintain a legacy desktop program written in Pascal and now need it re-imagined as a browser-based application. The goal is to keep every current feature inta...

HL-40205389

Secure Backend Development with Capacity Rules

We are a growing moving company using Base44 as our operational frontend for scheduling jobs, crews, and trucks. We currently rely on Base44’s vendor-managed ba...

HL-40205418

• Deep interaction with ERC-20 tokens, approvals, balances, and transfers • Optimize DEX routing, slippage control, and execution guarantees • Build and maintain fail-safe logic to ensure transactions either complete fully or revert • Collaborate on hi

We’re looking for a technically strong DeFi specialist to work with advanced, short-duration liquidity strategies involving major stable assets. This role focus...

HL-40205268