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Senior Fastapi Developer Jobs in Princeton, NJ (NOW HIRING)

Newcode.ai

Senior Fullstack Developer

New York, NY

$59.50 - $78.75/hr

The role You'll build features the whole way through: the FastAPI service and data work on the back, the React interface on the front. Most of what we build puts a language model in front of someone ...

Newcode.ai

Senior Fullstack Developer

New York, NY · On-site

$59.50 - $78.75/hr

The role You'll build features the whole way through: the FastAPI service and data work on the back, the React interface on the front. Most of what we build puts a language model in front of someone ...

Apply Early

Ro

Senior Backend Engineer, Product

New York, NY · On-site

The Role We are looking for a Senior Software Engineer to join the Patient Experience team at Ro ... Design and build scalable, reliable, and resilient distributed services using Python with FastAPI ...

Morgan Stanley

Senior AI Engineer

New York, NY

$134K - $176K/yr

... FastAPI or Flask. * Proven experience designing and delivering production-grade AI or LLM-based ... Exposure to CI/CD, DevOps, or GitOps practices (e.g., Jenkins, GitHub Actions). Soft Skills

Inizio Partners

AI Engineer

New York, NY

$150K - $175K/yr

Role: Senior AI Engineer (GenAI & Azure/ .NET Full-Stack Integration) Experience: 10-12 Years ... NET Core , React , and Python-based AI frameworks (LangGraph, Semantic Kernel, or FastAPI). * Hands ...

Morgan Stanley

Senior AI Engineer

New York, NY · On-site

$134K - $176K/yr

... FastAPI or Flask. * Proven experience designing and delivering production-grade AI or LLM-based ... Exposure to CI/CD, DevOps, or GitOps practices (e.g., Jenkins, GitHub Actions). Soft Skills

Ro

Senior Backend Engineer, Product

New York, NY

The Role We are looking for a Senior Software Engineer to join the Patient Experience team at Ro ... Design and build scalable, reliable, and resilient distributed services using Python with FastAPI ...

Ro

Senior Backend Engineer, Product

New York, NY · On-site

The Role We are looking for a Senior Software Engineer to join the Patient Experience team at Ro ... Design and build scalable, reliable, and resilient distributed services using Python with FastAPI ...

Hearst Newspapers

Senior Data Engineer

New York, NY · On-site

$116K - $157K/yr

... like FastAPI, Flask, or Django. * Data Architecture: Strong proficiency in SQL and experience ... Nice-to-Have (DevOps & MLOps) * Infrastructure as Code (IaC): Experience with Terraform, Crossplane ...

Hearst Newspapers

Senior Data Engineer

New York, NY · On-site

$116K - $157K/yr

... like FastAPI, Flask, or Django. * Data Architecture: Strong proficiency in SQL and experience ... Nice-to-Have (DevOps & MLOps) * Infrastructure as Code (IaC): Experience with Terraform, Crossplane ...

Ash

Senior Software Engineer - Platform Group

New York, NY · On-site +1

$175K - $200K/yr

About the Role Ash is seeking a highly skilled Senior Software Engineer to join our engineering ... Python (FastAPI, Uvicorn, Pydantic), Javascript, Typescript, sometimes Go * Databases: MySQL, Redis ...

Hearst Newspapers

Senior Data Engineer

New York, NY · On-site

$116K - $157K/yr

... like FastAPI, Flask, or Django. * Data Architecture: Strong proficiency in SQL and experience ... Nice-to-Have (DevOps & MLOps) * Infrastructure as Code (IaC): Experience with Terraform, Crossplane ...

Hearst

Senior Data Engineer

New York, NY · On-site

$116K - $157K/yr

... like FastAPI, Flask, or Django. * Data Architecture: Strong proficiency in SQL and experience ... Nice-to-Have (DevOps & MLOps) * Infrastructure as Code (IaC): Experience with Terraform, Crossplane ...

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Senior Fastapi Developer information

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How much do senior fastapi developer jobs pay per hour?

As of Jul 5, 2026, the average hourly pay for senior fastapi developer in Princeton, NJ is $64.71, according to ZipRecruiter salary data. Most workers in this role earn between $54.95 and $72.60 per hour, depending on experience, location, and employer.

What does a Senior FastAPI Developer do?

A Senior FastAPI Developer designs, develops, and maintains backend web applications using the FastAPI framework in Python. They are responsible for building scalable APIs, optimizing performance, ensuring security best practices, and integrating with databases and external services. Senior developers also mentor junior team members, contribute to architecture decisions, and collaborate closely with front-end engineers and stakeholders to deliver robust software solutions.

What are some common challenges faced by Senior FastAPI Developers when scaling applications, and how can these be addressed?

Senior FastAPI Developers often encounter challenges related to managing high concurrency, optimizing API performance, and ensuring robust security as applications scale. To address these, it’s important to implement asynchronous programming practices, leverage efficient database queries, and utilize API gateways for better traffic management. Collaboration with DevOps and QA teams is also essential to automate deployments and monitor system health, ensuring smooth scaling and reliable user experiences.

What are the key skills and qualifications needed to thrive as a Senior FastAPI Developer, and why are they important?

To thrive as a Senior FastAPI Developer, you need deep expertise in Python, RESTful API design, and experience building scalable web backends, typically supported by a degree in computer science or related field. Familiarity with FastAPI, Docker, cloud platforms (such as AWS or Azure), and CI/CD tools is highly valued, along with proficiency in testing frameworks. Strong problem-solving, leadership, and communication skills help you collaborate effectively with cross-functional teams and mentor junior developers. These skills enable the delivery of robust, efficient, and maintainable APIs that support business goals and high user demands.
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Senior Fastapi Developer jobs near you

Senior Fullstack Developer

Newcode.ai

New York, NY

$59.50 - $78.75/hr

Full-time

Posted 20 days ago

Job description

Who are we?

At Newcode.ai, we're on a mission to reshape how organizations put AI to work in their day-to-day operations. In few months, we've moved from vision to reality-building products our clients truly love. As part of our fast-growing and highly ambitious team, you won't just drive the future of AI-you'll help define it.

The role

You'll build features the whole way through: the FastAPI service and data work on the back, the React interface on the front. Most of what we build puts a language model in front of someone doing real work, so a typical feature might mean wiring up retrieval and an LLM call on the backend, then building the streaming, document-heavy UI that makes it usable. 


We want someone who can carry a feature from idea to production without handing it over a wall. You should be at home in a Celery task and in a React component, and able to handle routine work on either side without waiting for a specialist to unblock you.

Requirements

What You'll Do
  • Building AI features end to end, API through UI. 
  • Making models usable: streaming responses, real-time updates, and interfaces that handle a lot of documents without feeling slow. 
  • Owning quality and architecture on both sides of a feature. 
  • Pulling in our frontend or backend specialists when something needs real depth, and handling the rest yourself. 
Who You Are
  • At least five years building and shipping fullstack work. Depth matters more to us than the number. 
  • Comfortable on both sides for real: you can design a clean API and build a good UI on top of it. 
  • You care how it turns out: readable code, a UI that feels right, an architecture you'd defend. 
  • You use AI coding tools (Claude Code, Cursor, Copilot) and use them well. They make you faster; they don't write code you don't understand, and you wouldn't pass sloppy AI output in review. 
  • Keen to go deeper on LLMs, RAG, and agents. 
  • Fine working in a startup that shifts under you. 
Experience we expect with the stack
  • React: 5+ years 
  • TypeScript: 3+ years 
  • FastAPI / Python: 3+ years 
  • PostgreSQL 
  • Redis: 2+ years 
  • Tailwind CSS: 1+ year 

Nice to have: Next.js, React Query, Zustand, shadcn/ui; LangChain or LlamaIndex; streaming over SSE or WebSocket. 

Benefits

Why Newcode.ai?
  • Join a collaborative, high-energy team where your ideas are heard and your impact is real.
  • Help design, build, and launch products shaping the future of artificial intelligence.
  • Work flexibly, in English, from anywhere in the EU.

At Newcode.ai, you don't just see the future-you help create it.
Ready to shape what's next? Apply today and join us in building a smarter, more efficient world powered by AI.

Apply