Find the Best Back-End Developers Jobs
Check out a sample of the 1,311 Back-End Developers jobs posted on Upwork
Software Engineer
Hours needed
Duration
Experience level
This is a back end project involving taking an existing application built in Java, Spring Boot, and Oracle that currently runs on-premi…
Backend Developer for AI Chatbot / RAG Fixes
Fixed-price
Experience level
Need a backend developer with AI chatbot / RAG experience to fix out-of-context responses in an existing chatbot.Our backend tech stack…
Technical Delivery Lead — ship discipline for a small, AI-first software team
Hours needed
Duration
Experience level
We're a profitable, founder-led B2B SaaS company. Our product helps professional buyers aggregate data on items in marketplaces. Five…
Multi tenant LMS solution using Wordpress + Learndash + Uncanny plugins (must support SCORM files)
Fixed-price
Experience level
Project Type: End-to-End LMS Setup, Hosting, E-Commerce Integration, and Automation Core Stack: WordPress (Managed Hosting) + LearnDash…
Personal / Executive Assistant ( Branding, Marketing, Sales )
Fixed-price
Experience level
CIELO Agency is hiring an Executive Assistant / Personal Assistant to work directly with the Founder & CEO of a high-velocity branding…
Fintech Platform Risk Diagnosis & Architecture Assessment
Hours needed
Duration
Experience level
SPRINT 0 — Fintech Platform Risk Diagnosis & Architecture Assessment 10 Hours — Fixed Price (Project-Based) ACCESS & RULES OF ENGAGEME…
SR Software Developer | CRM Integration, Database Management & DevOps
Hourly ‐ Renewed 18 hours agoHours needed
Duration
Experience level
Technical Skills: Languages: PHP, Python, JavaScript, SQL Databases & Tools: MySQL, PostgreSQL, MongoDB DevOps & Infrastructure: AWS, D…
PHP Developer
Fixed-price
Experience level
We are looking for a PHP Backend Developer to further develop an existing project. The first stage involves completing and adapting the…
Creative Strategist, Direct Response Video Ads (eCommerce)
Fixed-price
Experience level
ABOUT US: We're a growing DTC eCommerce brand selling physical products through direct response advertising. Meta ads are our primary a…
part-time Senior Backend developer PHP Laravel | Side-job
Hours needed
Duration
Experience level
Key Responsibilities Create core API for real life quests / users / purchases Create services for automated publishing on different mar…
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