Find the Best React.js Jobs in Sparta, NJ
It takes just one job to develop a successful relationship that can propel your career forward.
Find workInterested in hiring?Trusted by
Check out a sample of the 44 React.js jobs posted on Upwork
Senior Roku & Fire TV Native CTV Engineer (BrightScript/SceneGrap…
Fixed-price ‐ Posted 6 days agoFixed-price
Experience level
Job Title: Senior Roku & Fire TV Native CTV Engineer (BrightScript/SceneGraph) Project Budget: $10,000 Hard-Cap (Phased Delivery) Po…
Lead Engineer — TypeScript/Postgres, Audit-Grade Evidence Platfor…
Hourly ‐ Posted 12 days agoHours needed
Duration
Experience level
Independent Review — Signing, Hash-Chain and Offline Verification (TypeScript / Postgres) Fixed price · One-off · ~10–15 hours · Remot…
Full Stack Developer with some cloud experience
Hourly ‐ Posted 29 days agoHours needed
Duration
Experience level
Need a fulstack with some ai and aws experience must be available full time.
Multivendor Website & Mobile App Development
Hourly ‐ Posted 1 month agoHours needed
Duration
Experience level
-Phase 1: B2B & B2R Platform allowing manufacturers to create accounts and fill out certain requirements, upload their products accord…
Sr software engineer that has build software solutions end to end…
Hourly ‐ Renewed 14 days agoHours needed
Duration
Experience level
Senior Software Engineer: Backend & Systems Architecture We’re looking for senior software engineers with deep experience in backend e…
Claude Code Full-Stack Developer for Cross-Platform Property Mana…
Fixed-price ‐ Posted 1 month agoFixed-price
Experience level
We are looking for an experienced AI-assisted full-stack developer to build a property management application for web and mobile. The a…
Deploy locked React/HTML prototype as PWA — Firebase + Vercel + c…
Fixed-price ‐ Posted 1 month agoFixed-price
Experience level
# Project Brief: Simplist — Build & Deploy ## What this is A fixed-scope build job: implement the attached locked HTML/React designs a…
Full-Stack Software Engineering
Fixed-price ‐ Posted 1 month agoFixed-price
Experience level
Numeraxial is seeking highly motivated and dedicated developer to support the development of its next-generation AI-powered investment…
Senior Full-Stack Developer (Next.js + WordPress) — Long-Term, In…
Hourly ‐ Posted 19 days agoHours needed
Duration
Experience level
## Read This First We're hiring **one dedicated developer** to join our small team long-term. Before anything else, two things that de…
Senior Next.js Developer (AI-Assisted) — Build a Finished Design…
Hourly ‐ Posted 28 days agoHours needed
Duration
Experience level
We're a physician-led digital psychiatry platform. Our website design is already 100% done: a fully locked design system plus ~53 finis…
Your next job starts right here
Set up a free profile to showcase your skills, experience and desired pay rate to clients. You choose the payment method that's best for you to easily get paid for your work.
Find workGives you security and peace of mind