Find the Best Back-End Developers Jobs
Check out a sample of the 1,211 Back-End Developers jobs posted on Upwork
Facebook and TikTok Video Publishing Code
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
Need a developer to create code that publishes videos from a platform to Facebook and TikTok. The solution should handle video upload,…
Senior Full-Stack Engineer (High Autonomy, Fast Execution)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
We are a fast-growing telecom / AI-First CPaaS serving sms and voice API's. We are building the first AI-first communications platform…
Creative Video Editor / Motion Designer Needed for 40-Second Interactive Experience Intro
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
# Creative Video Editor / Motion Designer Needed for 40-Second Interactive Experience Intro We’re looking for a highly creative **vide…
Base44 Integration Development
Hourly ‐ Posted 1 day agoHours needed
Duration
Experience level
I have an existing Base44 business command center for KXNG Cosmetics. Shopify, QuickBooks, Klaviyo, and Judge.me are already connected…
Senior Full-Stack Engineer (High Autonomy, Fast Execution)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
Summary We are a fast-growing telecom / AI-First CPaaS serving sms and voice API's. We are building the first AI-first communications…
Node.js Developer: Real-Time Call Coaching System (Twilio + Deepgram + Claude API)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
We operate a 24/7 taxi dispatch service and need a Node.js developer to build a real-time AI co-pilot system that helps our overseas ca…
Elementor WordPress Developer - Real Estate Website (Fixed Scope, Potential Future Work)
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
JOB TITLE: Elementor WordPress Developer - Fix Core Functionality on Real Estate Website (Fixed Scope, Potential Future Work) BUDGET:…
Python / AI Developer to Build PDF Medical Record Chronology Pipeline
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We need a lightweight, reliable Python script/tool that ingests multi-page PDF medical records, uses an LLM API (OpenAI, Claude, or Gem…
Comedy Script for Scooch for a wallet cell phone case
Hourly ‐ Renewed 1 day agoHours needed
Duration
Experience level
Comedy Script Writer Needed for Funny Short-Form Product Ads Scooch is a growing cell phone accessory brand looking for a talented com…
Senior Backend Engineer
Fixed-price ‐ Posted 1 day agoFixed-price
Experience level
We’re seeking a Senior Backend Engineer with 10+ years of hands-on experience building scalable, reliable systems. You should have stro…
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