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146 fastapi jobs at 100 companies in Fairfield, CA

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Remote Backend Engineer (Python/FastAPI)
San Francisco, California, United States
$200-$300/hr RemoteContract
Turing
Turing: AI-powered platform connecting companies with global remote software developers.
3+ YOE3+ years software engineering experience; strong Python and JavaScript (React, Node.js) skills; experience building and deploying production-grade scalable systems; excellent communication and code review ability.
Python, FastAPI, JavaScript, React, Node.js, C/C++, Java, Rust, Go
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2mo
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Senior Backend Engineer
San Francisco, California, United States
$175k-$275k/yr OnsiteFull Time
Hedra
Hedra: Builds artificial intelligence models for character-driven video generation.
5+ YOE5+ years backend development with Python, FastAPI/Pydantic; Kubernetes/EKS; relational databases; AWS stack; building scalable services.
Python, FastAPI, Pydantic, Kubernetes, EKS, PostgreSQL, Redis, S3, DynamoDB, AWS
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3mo
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Senior Full Stack Software Engineer
San Francisco or United States
$204k-$286k/yr HybridFull Time
Vivodyne
Vivodyne: Tests therapeutics on lab-grown human tissues using AI and robotics.
5+ YOE5+ years building complex React apps, TypeScript, Postgres; Python; FastAPI; API design; collaboration with scientists; AI tooling.
React, TypeScript, PostgreSQL, FastAPI, Python, CSS, Tailwind, TanStack
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3mo
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Founding AI Backend Engineer
San Francisco or New York
OnsiteFull Time
Pakket
Pakket: AI-powered operating system for warehouse logistics and operations.
3+ YOE3–6 years backend or full-stack experience; strong Python; FastAPI; SQL databases; Linux; Docker; cloud infrastructure; debugging mindset.
Python, FastAPI, PostgreSQL, SQLAlchemy, Linux, Docker, AWS, GCP, Render, DigitalOcean, OpenCV, YOLO
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2mo
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Senior Backend Engineer (Python)
San Francisco, California, United States
$175k-$250k/yr RemoteFull Time
Ellipsis Health
Ellipsis Health: AI-powered voice agent for healthcare care management.
4+ YOE4+ years building production back-ends in Python; real-time streaming; AWS/GCP/Azure; PostgreSQL/Redis; FastAPI/asyncio; HIPAA security.
Python, FastAPI, asyncio, WebRTC, WebSockets, gRPC, AWS, GCP, Azure, Kubernetes, Kafka, SQS, Pub/Sub, Terraform, PostgreSQL, Redis, OpenTelemetry
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2mo
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Staff Platform Engineer (Pacific Time Zone)
San Francisco, California, United States
$225k-$275k/yr HybridFull Time
Komodo Health
Komodo Health: Provides AI-driven healthcare data and patient journey analytics software.
Senior backend engineer with platform and control-plane experience; strong Python (FastAPI) and AWS; multi-tenant SaaS; focus on observability, reliability, and developer productivity.
Python, FastAPI, AWS, Snowflake, Airflow, Spark, RBAC, API design, KMC/PSS
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Senior Software Engineer, W&B Agent - W&B
Livingston or New York City or San Francisco or Sunnyvale or Bellevue
$182k-$242k/yr OnsiteFull Time
CoreWeave
CoreWeaveNASDAQ: CRWV: Specialized cloud infrastructure provider for high-performance AI workloads.
4+ YOE4+ years full‑stack experience with Python backend and React/TypeScript frontend; experience with FastAPI, Kubernetes, distributed systems, observability, and MySQL; security- and performance-minded.
Python, FastAPI, Kubernetes, React, TypeScript, Datadog, Weave tracing, MySQL, WebSockets, server-sent events
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3mo
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Staff Software Engineer
Oakland or Atlanta or New York
$107k-$200k/yr HybridFull Time
SiriusXM
SiriusXMNASDAQ: SIRI: Audio entertainment providing satellite and streaming services.
8+ YOE8+ years of software engineering; Python (Django/FastAPI), backend and distributed systems; AWS, Kubernetes; observability tools; degree or equivalent experience; eligible to work in the U.S.
Python, Django, FastAPI, AWS, Kubernetes, Datadog, Sentry, Grafana, Kafka, Airflow, Celery, Google Ad Manager
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Senior Software Engineer - AI, CoCounsel International
Eagan or Frisco or New York City or Ann Arbor or San Francisco or Los Angeles or Irvine or McLean or Washington
$110k-$204k/yr HybridFull Time
Thomson Reuters
Thomson ReutersNASDAQ: TRI: Provides professional software, data, and news services globally.
4+ YOE4+ years backend engineering experience with Python, FastAPI, PostgreSQL, AWS; production agentic AI and LLM integration experience; strong debugging, architecture, and collaboration skills.
Python, FastAPI, PostgreSQL, AWS, OpenAI, Anthropic
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GenAI Python Systems Engineer –Senior Manager
Chicago or Raleigh or Charlotte or Cincinnati or Cleveland or Columbia or Columbus or Dallas or Baltimore or Richmond or Rosemont or Sacramento or Boston or St. Louis or Salt Lake City or San Antonio or San Diego or San Francisco or Silicon Valley or Seattle or Spartanburg or Albany or Stamford or Tampa or Atlanta or Toledo or Austin or Tulsa or Washington or Denver or Des Moines or Detroit or Buffalo or Florham Park or Kansas City or Las Vegas or Little Rock or Los Angeles or Louisville or Birmingham or Fayetteville or Miami or Milwaukee or Minneapolis or Nashville or New Orleans or New York or Oklahoma City or Philadelphia or Phoenix or Pittsburgh or Portland
$124k-$280k/yr HybridFull Time
PwC
PwC: Providing audit, tax, and management consulting services to businesses.
8+ YOESenior Manager level with 8+ years of experience; proficient in Python, SQL, FastAPI; cloud certifications a plus; willing to travel up to 80%; Bachelor's degree required.
Python, SQL, FastAPI, Cloud Platforms, LLM techniques, Data Warehousing, Data Lakes, IAM
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3mo
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Full-Stack Software Engineer
San Francisco, California, United States
$120k-$180k/yr OnsiteFull Time
Tacit
Tacit: Developing advanced hardware to rethink human-computer interaction.
2+ YOEProficiency in Python (FastAPI, Pydantic) and TypeScript/React; experience building production backends and shipping user-facing features; 2+ years software engineering; startup-ready.
Python, FastAPI, Pydantic, TypeScript, React, CI/CD, Pandas, Numpy
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2mo
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Senior Software Engineer, App
Cambridge or San Francisco
$144k-$240k/yr HybridFull Time
Lila Sciences
Lila Sciences: Develops an AI platform for autonomous scientific research and discovery.
5+ YOEBachelor’s or Master’s in CS/Engineering; 5-8+ years backend/full-stack exp; React, TypeScript, FastAPI, Python; AWS, Kubernetes; AI tooling; strong collaboration.
React, TypeScript, Nx, Tailwind, FastAPI, Python, Pydantic, SQL, NoSQL, AWS, Kubernetes, Terraform, GitHub Actions
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1mo
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Founding Engineer
San Francisco, California, United States
$120k-$150k/yr OnsiteFull Time
Avent Industrial
Avent Industrial: AI-powered operating system for industrial supply chains.
Experienced engineer to build core systems for quoting, procurement, and decision-making; systems thinking, high ownership, speed with judgment; familiarity with Next.js, TypeScript, Python/FastAPI, and PostgreSQL.
Next.js, TypeScript, Python, FastAPI, PostgreSQL
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1mo
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Engineering Manager
Munich or Austin or San Francisco
OnsiteFull Time
RobCo
RobCo: A developing modular, software-defined industrial robotics and automation solutions.
3+ YOE3+ Mgmt3+ years leading technical teams in robotics or industrial IoT; deep experience with Python, FastAPI, Vue.js, Docker on Linux; strong SDLC, CI/CD, and stakeholder communication skills.
Python, FastAPI, Vue.js, Docker, Linux
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2w
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Software Engineer, AI Runtime & Platform Services
San Francisco, California, United States
HybridFull Time
CrewAI
CrewAI: Platform for orchestrating collaborative multi-agent AI systems.
Strong Python backend/platform experience building production services; FastAPI, Celery, Redis, Pydantic, typed Python; distributed systems, auth/security, observability, testing and CI experience.
Python, FastAPI, Celery, Redis, Pydantic, OpenTelemetry, Sentry, pytest, mypy, ruff, AWS ECS, AWS ECR, Kubernetes, Helm, Rails
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Senior Software Engineer - Full Stack, Technical Lead
San Francisco, California, United States
$200k-$250k/yr HybridFull Time
Baton
BatonNYSE: R: Builds AI software to automate and optimize supply chains.
5+ YOE5+ years full-stack experience; advanced Python; frontend with React and TypeScript; backend experience with GraphQL/FastAPI; Postgres and AWS familiarity; proven technical project leadership and mentorship.
Python 3, GraphQL, FastAPI, React, TypeScript, Postgres, AWS
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3mo
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Senior/Staff Software Engineer (Full-Stack Engineer)
San Francisco or New York City
$120k-$180k/yr OnsiteFull Time
Actively AI
Actively AI: AI agents for automated enterprise revenue and sales operations.
5+ YOE5+ years shipping customer-facing full-stack products; strong React/TypeScript frontend; Python/FastAPI backend; architectural and product-minded; experience with AI-powered products.
Python, FastAPI, React, TypeScript, SQL, NoSQL, Caching, APIs
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3mo
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Software Engineer - Senior Backend
San Francisco, California, United States
HybridFull Time
FriendliAI
FriendliAI: High-performance generative AI inference platform and serving infrastructure.
5+ YOE5+ years backend or systems engineering; CS/comp eng degree; Python and FastAPI; distributed systems; API design; PostgreSQL and OLAP; multi-tenant SaaS; cloud-native; observability.
Python, FastAPI, PostgreSQL, ClickHouse, REST, gRPC, GraphQL, OpenTelemetry, Kubernetes
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3mo
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Full-stack Software Engineer
San Francisco, California, United States
$200k-$300k/yr OnsiteFull Time
Valius
Valius: Provides precision oncology diagnostics and molecular testing for cancer.
3+ YOE3+ years of software engineering; strong front-end (React, TypeScript, Tailwind) and back-end (Python, FastAPI, cloud) skills; ownership of features; strong communication; patient-focused mission.
React, TypeScript, Tailwind, Python, FastAPI, Cloud, Data Pipelines
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Platform Engineer, APIs & Observability
San Francisco or New York City
$180k-$200k/yr HybridFull Time
StackAI
StackAI: Build and deploy custom AI agents without writing code.
4+ YOE4+ years building backend services and public APIs; strong REST/OpenAPI skills, observability and distributed tracing, Python and FastAPI, familiarity with TypeScript/Node.js, and analytics-driven metrics and reporting.
OpenAPI, Python, FastAPI, TypeScript, Node.js, OpenTelemetry, ClickHouse, Druid
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