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Freelance Backend Python Jobs in New York (NOW HIRING)

Solomon Page

Software Tester

Manhattan, NY · On-site

$53/hr

... Python, JavaScript, TypeScript, Go, or similar languages. * Proven experience testing backend APIs ... freelancers - which sets us apart in the industries we serve. About Solomon Page Founded in 1990 ...

MSLGROUP

Full Stack Engineer

Manhattan, NY · Remote

$100K - $130K/yr

Implement and maintain web applications across the stack using TypeScript, including backend gRPC ... Experience building Python services (Flask, FastAPI) * Experience with pub-sub and queue-based ...

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Freelance Backend Python information

What is the difference between Freelance Backend Python vs Backend Developer?

AspectFreelance Backend PythonBackend Developer
CredentialsOften self-taught or with certifications in Python, web development, or related fieldsBachelor's degree in Computer Science or related field, with experience in backend technologies
Work EnvironmentIndependent, remote, project-basedFull-time or part-time, in-office or remote, employed by a company
Industry UsageFreelance platforms, tech startups, consultingTech companies, enterprises, startups
Search & Comparison IntentLooking for freelance opportunities, project-based workSeeking full-time or contract backend roles

Freelance Backend Python professionals typically work independently on project-based tasks, often remotely, and may not require formal degrees but should have strong Python skills. Backend Developers usually work as part of a team within a company, often holding formal education credentials. Both roles involve backend technologies, but their work settings and employment types differ significantly.

What are the most commonly searched types of Backend Python jobs in New York? The most popular types of Backend Python jobs in New York are:
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Freelance Backend Python jobs near you

Senior Python Full-Stack Engineer - AI Data & Infrastructure

Alignerr

Manhattan, NY • Remote

Other

Posted 16 days ago

Job description

Senior Python Full-Stack Engineer - AI Data & Infrastructure
About the Role
What if your Python expertise could directly shape the infrastructure behind the world's most advanced AI systems? We're looking for a Senior Python Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve next-generation models.
This is a fully remote contract role with meaningful technical challenges, flexible hours, and the opportunity to work on production systems that sit at the frontier of AI development.
  • Organization
    : Alignerr
  • Type
    : Hourly Contract
  • Location
    : Remote
  • Commitment
    : 20-40 hours/week
What You'll Do
  • Design, build, and optimize high-performance Python systems supporting large-scale AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for data annotation, validation, and quality control at scale
  • Improve the reliability, performance, and safety of existing Python codebases
  • Collaborate with data, research, and engineering teams to support model training and evaluation infrastructure
  • Identify bottlenecks and edge cases in data and system behavior - then implement scalable, production-ready fixes
  • Participate in synchronous design reviews to iterate on architecture and implementation decisions
Who You Are
  • Native or fluent English speaker with clear written and verbal communication skills
  • Full-stack developer with a strong systems programming background
  • 5+ years of professional experience writing production-grade Python
  • Deep understanding of performance optimization and concurrency - asyncio, multiprocessing, threading
  • Comfortable with type safety tooling such as Pydantic and mypy
  • Experienced building robust backend services (FastAPI, Django, or similar) or scalable data pipelines
  • Able to commit 20-40 hours per week with consistency
Nice to Have
  • Prior experience with data annotation, data quality pipelines, or evaluation systems
  • Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
  • Experience with distributed systems or developer tooling
  • Background working alongside research or applied ML teams
Why Join Us
  • Work directly on production AI infrastructure used by leading research labs
  • Fully remote and flexible - work from anywhere on a schedule that suits you
  • Freelance autonomy paired with technically meaningful, high-impact work
  • Collaborate with sharp engineers and researchers at the cutting edge of AI
  • Potential for ongoing work and contract extension as projects evolve and expand

Apply