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Senior Fastapi Developer Jobs in New York (NOW HIRING)

Saransh Inc

Senior Python Web Developer - Only W2

Warren, NJ · On-site

$126K - $169K/yr

Senior Python Web Developer Location: Warren, NJ (Onsite - 3 days a week to biweekly, subject for ... Experience with modern Python web frameworks such as Flask, FastAPI, or Django. * Experience ...

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 ...

DDN

Sr. Software Engineer - Internal Apps

Manhattan, NY · On-site

$150 - $200/hr

We're looking for a Senior Software Engineer to build internal applications on top of DDN ... Internal applications -- design, build, and operate full-stack web apps (FastAPI/Flask + React ...

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 ...

Citi

Senior Generative AI Developer

New York, NY · On-site

$142K - $213K/yr

About the Role We are looking for a Senior Generative AI Developer to join our COO Technology ... Expert-level Python proficiency - including async programming, API development (FastAPI, Flask ...

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Senior Staff Data Engineer - Python / GCP

Stamford, CT · Remote

$140K - $170K/yr

Senior Staff Data Engineer is a hands-on role and will be the primary architect and technical lead ... Develop and maintain scalable data services and RESTful APIs using Python (FastAPI/Django) to ...

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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 September 2026, with employment types broken down into 83% Full Time, 7% Part Time, and 10% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution.

Senior Software Engineer - AI Hardware Backend

Manhattan, NY • On-site

Nuha
See more jobs at Nuhaexternal

$125 - $150/hr

Other

Re-posted 5 days ago

Key responsibilities

  • Build and maintain FastAPI services that manage WebSocket connections, device sessions, and conversation state

  • Orchestrate LLMs, process sensor data, and connect embedded devices to AI infrastructure

  • Develop database architecture for user profiles, interaction history, conversation memories, and sensor logs

Job description

Senior Software Engineer - AI Hardware Backend

Location: NYC - In office.

About Us

Nuha is a research lab based in New York City. We teach companions how to understand, interact with, and respond to humans and the physical world.

Your Role

You'll own the backend infrastructure that powers our AI hardware. This means building the FastAPI services that orchestrate LLMs, audio transcription, sensor data processing, and model inference, connecting our embedded devices to the intelligence that makes them work.

You'll work directly with our hardware team and our data/R&D team to turn sensor streams and voice interactions into intelligent responses.

What You'll Build
  • FastAPI services managing WebSocket connections, device sessions, and conversation state
  • LLM orchestration (Groq, OpenAI, Modal), conversation memory, prompt engineering, safety guards
  • Database architecture (Supabase) - user profiles, interaction history, conversation memories, sensor logs
  • Authentication, connection lifecycle, monitoring, and error recovery across production devices
  • Process streaming mmWave radar frames and generate tracking visualizations (VisPy)
  • Fuse audio, radar, and accelerometer data into coherent context for LLMs
  • Build sensor summarization pipelines using VLMs to describe physical space
  • Event-driven coordination of audio capture, VAD, TTS playback, and sensor streams
Product Features & Infrastructure
  • Ship new interaction features based on customer feedback and product vision
  • Build internal tools for debugging device interactions and analyzing sensor data in production
  • Design data pipelines for user analytics, interaction logging, and model evaluation
  • Performance optimization - reduce latency, improve reliability, handle connection failures gracefully
  • Testing infrastructure for hardware-in-the-loop validation and API integration tests
  • Iterate on the interaction experience - make conversations feel more natural and responsive
Requirements
  • Systems thinking - Bridge hardware constraints, API limitations, and ML requirements
  • Real-time data pipelines - Experience with streaming data, low-latency systems, or sensor processing
  • API orchestration - Coordinate multiple services (transcription, LLM, inference) reliably
  • Cross-functional collaboration - Work with hardware engineers and ML researchers effectively
  • Ships production code - Build reliable services that handle real user interactions
Bonus
  • Mathematical maturity
  • VisPy/graphics experience
  • Hardware experience
Team

You'll work alongside engineers doing: RF/mmWave radar design, PCB/enclosure design, embedded client software, ML accelerator R&D, data infrastructure, and manufacturing systems.

Interview Process
  • Phone screen
  • Technical interview - Standard SWE problem solving and system design
  • In-person deep dive - Walk us through a complex technical problem you've solved
  • Work trial - Spend time with the team working on a real problem
Location

NYC - In office. We're building a physical product and need to work together in person.

  • Any backend/systems projects you've built
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