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Senior Fastapi Developer Jobs in New York (NOW HIRING)

Headstart AI

Senior Software Engineer

Manhattan, NY · On-site

$134K - $177K/yr

... Python, FastAPI, Node.js), relational databases (Postgres/MySQL), and optionally frontend ... developer productivity infrastructure at scale Preferred : • Bonus if you've been a founding ...

Biograph

Senior Fullstack Software Engineer

Manhattan, NY · On-site

$150 - $200/hr

Biograph is looking for senior software engineers to help us scale a data driven approach to ... NextJS and Django/FastAPI. * Core services - connect and utilize the world's health data to improve ...

Doctronic Inc

Senior Backend Engineer

New York, NY · On-site

$85K - $240K/yr

Senior Backend Engineer Doctronic | New York City ONSITE (Hybrid) | Reports to CEO The Mission Let ... Scalable APIs using Python, FastAPI, AWS handling millions of monthly requests * RESTful API ...

Virtusa Corporation

Senior Consultant

Jersey City, NJ · On-site

We are seeking an experienced Senior Python Engineer to design, build, and maintain scalable, high ... programming • Experience with at least one major Python web framework (Django, Flask, or FastAPI ...

Virtusa Corporation

Senior Consultant

Jersey City, NJ · On-site

We are seeking an experienced Senior Python Engineer to design, build, and maintain scalable, high ... programming • Experience with at least one major Python web framework (Django, Flask, or FastAPI ...

Veris AI

Senior Backend Engineer

Manhattan, NY · On-site

Responsibilities : • Design and code backend services in Python /FastAPI and data-store ... cloud and DevOps tasks: IaC, container builds, monitoring, and cost tuning. • Collaborate with ...

Siri InfoSolutions Inc

Cloud Full Stack Engineer

Raritan, NJ · On-site

$57 - $76.25/hr

Role : Senior Cloud Full Stack Engineer Location: Raritan, NJ Duration : Long Term Contract Job ... Build backend services, APIs, automation tools, and microservices using Python (Flask/FastAPI)

Hume AI

Senior Platform Engineer

New York, NY · On-site

$114K - $157K/yr

Hume AI is seeking a talented senior software engineer with strong experience in backend services ... GCP, AWS). * Experience in Kotlin/Spring, Typescript/Express, Python/FastAPI, or Rust. * Deep ...

Hume AI

Senior Platform Engineer

New York, NY · On-site

$180K - $230K/yr

Hume AI is seeking a talented senior software engineer with strong experience in backend services ... GCP, AWS). * Experience in Kotlin/Spring, Typescript/Express, Python/FastAPI, or Rust. * Deep ...

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Senior Fastapi Developer information

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 the key skills and qualifications needed to thrive as a Senior FastAPI Developer?

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.

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.

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Senior Fastapi Developer jobs near you
Infographic showing various Senior Fastapi Developer job openings in New York as of August 2026, with employment types broken down into 81% Full Time, 6% Part Time, and 13% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution.

Senior Software Engineer

Headstart AI

Manhattan, NY • On-site

$134K - $177K/yr

Full-time

Re-posted 29 days ago

Job description

Job Summary:
Headstart is a company focused on bringing companies into the age of intelligence through automation and software development. They are seeking a Senior Software Engineer to own and drive the full development lifecycle, build scalable APIs, and mentor other engineers while collaborating across teams to solve data-intensive problems.
Responsibilities:
• Own and drive the full development lifecycle from ideation through production
• Prototype rapidly while ensuring long-term reliability, maintainability, and security
• Build intuitive, accessible full-stack products from frontend interfaces or internal tools that surface model workflows and automate complex processes
• Architect, build, and maintain scalable APIs and systems that integrate LLMs to power both internal tooling and customer-facing workflows
• Collaborate across teams to identify solutions to data-intensive problems
• Mentor and support the growth of other engineers while helping to define and drive the technical roadmap
Qualifications:
Required:
• 5+ years of professional software engineering experience
• Strong interest in leveraging AI in the development lifecycle (bonus if experience)
• Enjoys a fast-paced and collaborative environment
• Proven track record owning full-stack systems: backend services (Python, FastAPI, Node.js), relational databases (Postgres/MySQL), and optionally frontend frameworks like React/Next.js
• Experience designing distributed systems, APIs, data pipelines, or developer productivity infrastructure at scale
Preferred:
• Bonus if you’ve been a founding engineer or startup early hire, with history building production products from scratch
• Bonus if you’re NYC based — we have a loft office in Soho and provide lunch and snacks
Company:
Automating software development and implementing AI solutions for clients. Founded in 2022, the company is headquartered in New York, NY, US, , with a team of 11-50 employees. The company is currently Early Stage.

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