Senior Full-Stack Engineer (Freelance/Contract) NexaFlow is seeking a Senior Full-Stack Engineer to ... development. - Backend expertise in Python or Node.js. - Frontend experience with React or Vue ...
Senior Full-Stack Engineer (Freelance/Contract) NexaFlow is seeking a Senior Full-Stack Engineer to ... development. - Backend expertise in Python or Node.js. - Frontend experience with React or Vue ...
Senior Full-Stack Engineer (Freelance/Contract) NexaFlow is seeking a Senior Full-Stack Engineer to develop a proof-of-concept code review tool powered by large language models (LLMs). Key ...
Senior Full-Stack Engineer (Freelance/Contract) NexaFlow is seeking a Senior Full-Stack Engineer to develop a proof-of-concept code review tool powered by large language models (LLMs). Key ...
Sr UI Developer React or Angular
Pasadena, CA · On-site
$54.50 - $71/hr
... not freelance / hobby experience) • Solid understanding of fundamental programming concepts • ... backend systems via REST API's • Experience with reactive programming concepts and RxJS • ...
Sr UI Developer React or Angular
Pasadena, CA · On-site
$54.50 - $71/hr
... not freelance / hobby experience) • Solid understanding of fundamental programming concepts • ... backend systems via REST API's • Experience with reactive programming concepts and RxJS • ...
Sr. UI Developer with React
Pasadena, CA · On-site
$65.50 - $84.75/hr
... not freelance / hobby experience) • Solid understanding of fundamental programming concepts • ... with enterprise backend systems via REST API's & Web Sockets • Experience with reactive ...
Sr. UI Developer with React
Pasadena, CA · On-site
$65.50 - $84.75/hr
... not freelance / hobby experience) • Solid understanding of fundamental programming concepts • ... with enterprise backend systems via REST API's & Web Sockets • Experience with reactive ...
Senior Full-Stack Engineer (Freelance Contract) NexaFlow is developing an LLM-powered automated ... P referred backend technologies: Python (FastAPI) or Node.js. * P referred frontend technologies:
Senior Full-Stack Engineer (Freelance Contract) NexaFlow is developing an LLM-powered automated ... P referred backend technologies: Python (FastAPI) or Node.js. * P referred frontend technologies:
Senior Full-Stack Engineer (Freelance Contract) NexaFlow is developing an LLM-powered automated ... Preferred backend technologies: Python (FastAPI) or Node.js. - Preferred frontend technologies:
Senior Full-Stack Engineer (Freelance Contract) NexaFlow is developing an LLM-powered automated ... Preferred backend technologies: Python (FastAPI) or Node.js. - Preferred frontend technologies:
Senior Roblox Developer
Los Angeles, CA · Remote
$35 - $55/hr
Strong understanding of backend services: Experience with Roblox's datastore, MemoryStoreService ... This freelance position is hourly but general work hours are M - F 9:00 AM - 7:00 PM PST. Top ...
Senior Roblox Developer
Los Angeles, CA · Remote
$35 - $55/hr
Strong understanding of backend services: Experience with Roblox's datastore, MemoryStoreService ... This freelance position is hourly but general work hours are M - F 9:00 AM - 7:00 PM PST. Top ...
Senior Roblox Developer
Los Angeles, CA · On-site +1
$35 - $55/hr
Strong understanding of backend services: Experience with Roblox's datastore, MemoryStoreService ... This freelance position is hourly but general work hours are M - F 9:00 AM - 7:00 PM PST. Top ...
Senior Roblox Developer
Los Angeles, CA · On-site +1
$35 - $55/hr
Strong understanding of backend services: Experience with Roblox's datastore, MemoryStoreService ... This freelance position is hourly but general work hours are M - F 9:00 AM - 7:00 PM PST. Top ...
... product, UX, backend services, and API teams to deliver scalable SFRA enhancements. • Own ... SFCC B2C Developer certificate (preferred). Enable Skills-Based Hiring No Can we use Freelancer?
... product, UX, backend services, and API teams to deliver scalable SFRA enhancements. • Own ... SFCC B2C Developer certificate (preferred). Enable Skills-Based Hiring No Can we use Freelancer?
UI/UX Frontend Lead Developer
San Francisco, CA · On-site
$60 - $65/hr
Collaborate with UX, product, and backend teams * Conduct code reviews and provide technical ... freelancers - which sets us apart in the industries we serve. About Solomon Page Founded in 1990 ...
UI/UX Frontend Lead Developer
San Francisco, CA · On-site
$60 - $65/hr
Collaborate with UX, product, and backend teams * Conduct code reviews and provide technical ... freelancers - which sets us apart in the industries we serve. About Solomon Page Founded in 1990 ...
The systems behind hundreds of thousands of AI interviews used to source and match freelance ... and developer efficiency: * Frontend: React.js with Redux, TypeScript * Backend: Node.js, ...
The systems behind hundreds of thousands of AI interviews used to source and match freelance ... and developer efficiency: * Frontend: React.js with Redux, TypeScript * Backend: Node.js, ...
Senior Platform Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... years of backend and infrastructure engineering experience * Hands-on experience deploying ...
Quick apply
Senior Platform Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... years of backend and infrastructure engineering experience * Hands-on experience deploying ...
Senior Software Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... Proficiency across the stack: comfortable with modern backend frameworks, APIs, and data modeling ...
Quick apply
Senior Software Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... Proficiency across the stack: comfortable with modern backend frameworks, APIs, and data modeling ...
Senior Applied AI Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... with strong applied AI and backend depth * Real-world experience building and shipping AI ...
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Senior Applied AI Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... with strong applied AI and backend depth * Real-world experience building and shipping AI ...
Senior Forward Deployed Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... with strong backend depth * Real-world experience building and shipping AI applications in ...
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Senior Forward Deployed Engineer, Handshake AI Enterprise
San Francisco, CA · On-site
$205K - $300K/yr
... freelance AI training gigs to first internships to full-time careers and beyond. This unique value ... with strong backend depth * Real-world experience building and shipping AI applications in ...
Staff Software Engineer, AI Data Platform
San Francisco, CA · On-site
$250K - $280K/yr
The systems behind hundreds of thousands of AI interviews used to source and match freelance ... and developer efficiency: * Frontend: React.js with Redux, TypeScript * Backend: Node.js, ...
Staff Software Engineer, AI Data Platform
San Francisco, CA · On-site
$250K - $280K/yr
The systems behind hundreds of thousands of AI interviews used to source and match freelance ... and developer efficiency: * Frontend: React.js with Redux, TypeScript * Backend: Node.js, ...
... freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which ... Coordinate a broad cross-functional surface across engineering (frontend, backend, ML, architecture ...
... freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which ... Coordinate a broad cross-functional surface across engineering (frontend, backend, ML, architecture ...
... freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which ... Coordinate a broad cross-functional surface across engineering (frontend, backend, ML, architecture ...
... freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which ... Coordinate a broad cross-functional surface across engineering (frontend, backend, ML, architecture ...
Freelance Backend Developer information
See California salary details
$11.86 - $18.35
0% of jobs
$18.35 - $24.85
1% of jobs
$24.85 - $31.34
5% of jobs
$31.34 - $37.83
6% of jobs
$37.83 - $44.32
7% of jobs
$46.27 is the 25th percentile. Wages below this are outliers.
$44.32 - $50.81
16% of jobs
The median wage is $56.44 / hr.
$50.81 - $57.30
16% of jobs
$57.30 - $63.80
18% of jobs
$66.04 is the 75th percentile. Wages above this are outliers.
$63.80 - $70.29
14% of jobs
$70.29 - $76.78
11% of jobs
$76.78 - $83.27
5% of jobs
$11
$56
$83
How much do freelance backend developer jobs pay per hour?
What are the key skills and qualifications needed to thrive in the Freelance Backend Developer position, and why are they important?
To thrive as a Freelance Backend Developer, you should have strong proficiency in server-side programming languages (such as Python, Java, or Node.js), database management, and API integration, ideally backed by a relevant degree or professional experience. Mastery of frameworks like Django, Spring, or Express, familiarity with cloud platforms (AWS, Azure), and knowledge of version control systems such as Git are commonly required; certifications in cloud computing or database administration can be advantageous. Strong problem-solving, self-motivation, and effective remote communication skills help freelancers manage projects and collaborate with diverse clients. These abilities are essential for delivering reliable backend solutions, maintaining client satisfaction, and building a successful freelance career.
What is a Freelance Backend Developer job?
A Freelance Backend Developer is a self-employed professional who builds and maintains server-side applications, databases, and APIs that power websites and applications. They work with technologies like Node.js, Python, PHP, or Java to ensure efficient data processing and backend functionality. Typically, they collaborate with frontend developers, designers, and clients on a project basis. Their responsibilities include optimizing performance, managing security, and integrating third-party services.
What are some typical challenges freelance backend developers face, and how can they overcome them?
Freelance backend developers often encounter challenges such as managing multiple projects simultaneously, inconsistent workloads, and communicating requirements with clients who may have varying technical backgrounds. To overcome these hurdles, strong organizational skills, clear documentation, and proactive communication are vital. Many freelancers use project management tools and set clear milestones or deliverables to keep both themselves and clients on track. Additionally, staying updated with the latest backend technologies and best practices can help you deliver high-quality, competitive solutions. Building a reliable reputation and professional network also aids in securing steady freelance opportunities.

Full-time
Re-posted 20 days ago
Job description
NexaFlow is seeking a Senior Full-Stack Engineer to develop a proof-of-concept code review tool powered by large language models (LLMs).
Key Responsibilities:
- Design and implement a prototype tool that leverages LLMs to automatically review pull requests.
- Integrate LLM APIs (OpenAI/Anthropic) to identify bugs, security vulnerabilities, and code style issues in code submissions.
- Post contextual feedback directly on pull requests.
- Handle the entire development process independently, from architecture through deployment.
- Collaborate remotely with the NexaFlow team as needed.
Requirements:
- 5+ years of full-stack development experience.
- Proficiency in integrating LLM APIs such as OpenAI or Anthropic.
- Experience developing code review tools and working with CI/CD pipelines.
- Strong ability to independently manage end-to-end product development.
- Backend expertise in Python or Node.js.
- Frontend experience with React or Vue.
- Familiarity with Docker-based deployment.
Additional Information:
- This is a freelance/contract position, not a full-time employment role.
- Location: San Francisco (remote friendly).
About Fuku
Sourced by ZipRecruiter
Industry
Food services and drinking places
Company size
51 - 200 Employees
Headquarters location
New York, NY, US
Year founded
2015