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Freelance Senior Backend Developer Jobs (NOW HIRING)

Senior Backend Engineer

Boston, MA · Remote

$160K - $240K/yr

Senior Backend Engineer Role The Opportunity As a Senior Backend Engineer, you'll design and build scalable backend systems for an AI-driven data platform. You'll lead technical projects, handle ...

Senior Java Backend Developer

Dallas, TX · On-site

$119K - $155K/yr

Role Summary Senior Backend Developer with strong Java/Spring Boot and Angular skills needed to design, build, and maintain backend services, APIs, and platform capabilities. This role combines ...

Stefanini is looking for a Senior Backend Developer, Dearborn, MI (Onsite) For quick apply, please reach out Fardeen Ali at 248-582-6473/ fardeen.ali2@stefanini.com The Cloud Platform team is looking ...

Stefanini is looking for a Senior Backend Developer, Dearborn, MI (Onsite) For quick apply, please reach out Fardeen Ali at 248-582-6473/ fardeen.ali2@stefanini.com The Cloud Platform team is looking ...

As a Senior Backend Developer (PHP/Golang), you will contribute to the design, development, and optimization of scalable backend services powering high-performance digital products. Working in a ...

Stefanini is looking for a Senior Backend Developer, Dearborn, MI (Onsite) For quick apply, please reach out Fardeen Ali at 248-582-6473/ fardeen.ali2@stefanini.com The Cloud Platform team is looking ...

Backend Engineer Senior Location: Orlando, FL Duration: Permanent Position Description: Kforce is working with a client in search of a Senior Backend Engineer to join their team! This position is ...

Sr. Backend Developer

Dearborn, MI · On-site

$61 - $66/hr

Stefanini is looking for a Senior Backend Developer, Dearborn, MI (Onsite) For quick apply, please reach out Fardeen Ali at 248-582-6473/ fardeen.ali2@stefanini.com The Cloud Platform team is looking ...

Senior Backend Developer

Dearborn, MI · On-site

$111K - $144K/yr

Stefanini is looking for a Backend Developer(Dearborn, MI) For quick apply, please reach out to Fardeen Ali at / We are looking for candidate who will be responsible for develop and maintain the ...

Senior Backend Developer

Dearborn, MI · On-site

$110K - $144K/yr

Stefanini is looking for a Backend Developer(Dearborn, MI) For quick apply, please reach out to Fardeen Ali at 248-582-6473/Fardeen.ali2@stefanini.com We are looking for candidate who will be ...

Senior Backend Developer

Palo Alto, CA · On-site

$142K - $184K/yr

Stefanini is looking for a Backend Developer (Palo Alto, CA) For quick apply, please reach out to Fardeen Ali at / We are looking for candidate who will develop and maintain the back-end/ server-side ...

ABOUT THE ROLE Sphinx is hiring a Senior Backend Engineer to join our team, building the next generation of mission planning and command and control software for space communications programs. This ...

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Senior Backend Developer

Palo Alto, CA · On-site

$141K - $184K/yr

Stefanini is looking for a Backend Developer (Palo Alto, CA) For quick apply, please reach out to Fardeen Ali at 248-582-6473/Fardeen.ali2@stefanini.com We are looking for candidate who will develop ...

Senior Backend Developer

Palo Alto, CA · On-site

$141K - $184K/yr

Stefanini is looking for a Backend Developer (Palo Alto, CA) For quick apply, please reach out to Fardeen Ali at 248-582-6473/Fardeen.ali2@stefanini.com We are looking for candidate who will develop ...

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Showing results 1-20

Freelance Senior Backend Developer information

See salary details

$64K

$139.8K

$190.5K

How much do freelance senior backend developer jobs pay per year?

As of Jul 9, 2026, the average yearly pay for freelance senior backend developer in the United States is $139,839.00, according to ZipRecruiter salary data. Most workers in this role earn between $120,500.00 and $156,500.00 per year, depending on experience, location, and employer.
What cities are hiring for Freelance Senior Backend Developer jobs? Cities with the most Freelance Senior Backend Developer job openings:
What are the most commonly searched types of Senior Backend Developer jobs? The most popular types of Senior Backend Developer jobs are:
What states have the most Freelance Senior Backend Developer jobs? States with the most job openings for Freelance Senior Backend Developer jobs include:
Infographic showing various Freelance Senior Backend Developer job openings in the United States as of July 2026, with employment types broken down into 92% Full Time, 3% Part Time, and 5% Contract. Highlights an 78% Physical, 3% Hybrid, and 19% Remote job distribution, with an average salary of $139,839 per year, or $67.2 per hour.
Senior Backend Engineer

Senior Backend Engineer

ICONSTAFF

Boston, MA • Remote

$160K - $240K/yr

Full-time

Posted 29 days ago


Job description

Senior Backend Engineer Role


The Opportunity

As a Senior Backend Engineer, you’ll design and build scalable backend systems for an AI-driven data platform. You’ll lead technical projects, handle large-scale data processing, and help shape system architecture and performance.


What You’ll Do

  • Design and build backend systems and APIs
  • Own projects from planning to deployment
  • Collaborate across engineering, data, and product teams
  • Support AI/ML model deployment and infrastructure
  • Improve system reliability, scalability, and performance
  • Implement security best practices
  • Mentor engineers and uphold code quality standards


Who You Are

  • 5+ years of backend engineering experience
  • Strong Python skills and experience with large-scale systems
  • Solid understanding of APIs, databases, and cloud infrastructure
  • Experience with distributed systems and data pipelines
  • Focus on performance, scalability, and clean code
  • Interest in AI/ML is a plus


Bonus

  • Experience with LLMs, Docker/Kubernetes, or data visualization
  • Startup or full-stack experience


Additional Info

  • Fully remote (U.S. only)
  • Competitive salary, equity, and benefits