Find the Best Backend Rest API Jobs
Check out a sample of the 930 Backend Rest API jobs posted on Upwork
Full-Stack MERN Developer | React, Node.js, Express & MongoDB Specialist
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
Title: Looking for an Experienced MERN Stack Developer to Build a Scalable Web Application Overview: We are looking for a skilled MERN…
Developer Agency — Platform Maintenance, Integrations & AI Features (Transportation Platform)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
We are seeking a Developer to oversee the ongoing maintenance, stability, and enhancement of our transportation platform. In this role,…
Kalshi trading bot (Python) — official API, private VPS, config-driven rules
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
I need a Python bot that trades my own Kalshi account using Kalshi’s official API only. No website scraping. No third-party signal serv…
Full-Stack Developer — Financial Industry MVP (Web App)
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We are building an MVP for a financial industry web application and are looking for an experienced full-stack developer to take ownersh…
AI SaaS Developer Needed — Build AI Sales Agent MVP for Home-Service Businesses
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We are looking for an experienced Full-Stack AI Developer to build an MVP of an AI-powered sales/lead follow-up SaaS for home-service b…
Senior Solana Rust Blockchain Engineer - Core Protocol & Backend
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
About the Project We are building and expanding a high-performance Web3 infrastructure platform built around the Solana ecosystem. We…
Hybrid engineer to finish and ship a K-12 school platform (TypeScript, Postgres, AWS)
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
School Systems Lab builds software for private K-12 schools. We have a student information and admissions platform that is substantiall…
Senior Backend Engineer (Python / FastAPI)
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We're hiring a second backend engineer at Banrox. Location: Remote. We hire across the US, EU, and Latin America for this seat and rat…
Backend Engineer Needed
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
# Senior Rust Backend Engineer — Web3 Infrastructure ## About the Project We are building a high-performance Web3 infrastructure plat…
Mobile App Development (iOS & Android)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
Job Description: We are looking for an experienced developer to build the first version (MVP) of a cross-platform mobile application fo…
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