Hire Senior FastAPI Developers.
Async Python engineers who ship FastAPI services with type-safe contracts, auto-generated OpenAPI, and production-grade ergonomics.
80+
Products shipped
8+ yrs
In production
5–10 days
Time to start
24h
Reply time
Overview
FastAPI is the right framework when you want type-safe Python APIs without DjangoREST ceremony. Our FastAPI developers ship async-first services, write Pydantic v2 schemas as a contract that's also documentation, and use dependency injection to keep handlers thin. We pair FastAPI with SQLAlchemy 2.0 async, Alembic migrations, Celery or ARQ for background tasks, and OpenTelemetry for tracing. Services we ship handle thousands of RPS per instance and are deploy-anywhere — Docker, AWS Lambda via Mangum, Vercel Functions, or bare VPS.
Why Techyor.
Senior. Specialist. Shipping.
Async-first by default
Our developers think in event loops, structured concurrency, and backpressure — not threads. FastAPI is asyncio-native; we use it that way.
Pydantic v2 throughout
Schemas are contracts. We use Pydantic v2's validation and serialization for type-safe APIs that double as auto-generated OpenAPI specs your frontend can consume.
Dependency injection that scales
FastAPI's DI shines for testability and modularity. We use it to keep handlers thin, mock cleanly in tests, and structure code that scales past 30 endpoints.
What they cover.
Skills and stack.
Capabilities
- FastAPI — async, dependency injection, OpenAPI customization
- Pydantic v2 — validation, custom validators, serialization
- SQLAlchemy 2.0 async — joined loading, query optimization
- Alembic — migrations, branching, downgrade safety
- Authentication — OAuth 2.0, JWT, Auth0/Clerk integration
- WebSockets — broadcasting, room management
- Background tasks — ARQ, Celery (sync mode), FastAPI BackgroundTasks
- Testing — pytest-asyncio, httpx AsyncClient, real DB integration tests
- Deployment — Docker, Mangum (Lambda), uvicorn workers behind nginx
Tech stack
The people behind the work.
Hire them directly.
Selected work.
FastAPI Developers in the wild.
A small slice of 3 projects where this role led the work.
SimpleTalk AI
Enterprise AI voice sales platform handling 147K+ calls across 12 languages, with multi-channel agents, white-label tenancy, and deep CRM integrations.
ConvertBankStatement
A specialized PDF-to-Excel conversion platform powered by a custom Python OCR engine, supporting 250+ bank formats and 30+ currencies for accountants and finance teams worldwide.
Shades of Gray Indigenous Pet Treats
A from-scratch Shopify replatform for an Indigenous-founded premium pet treats brand — single-protein storytelling, a custom B2B wholesale portal, and a Subscribe & Save engine, shipped in two months.
How you can hire.
Three ways to engage.
Dedicated Full-Time
A senior developer working exclusively on your product, embedded into your team, sprint cycle, and rituals. Best for roadmap-driven work with continuous shipping.
Part-Time / Fractional
Two to three days a week of senior expertise. Ideal for early-stage teams, technical advisory, code review, or supplementing an existing in-house team.
Fixed-Scope Project
Defined milestones, outcomes, and timeline. Best when the brief is clear and you want a predictable budget. Includes design, QA, and handover.
How it works.
Simple. No theatre.
- 01
Quick intro call
A 30-minute conversation. Tell us what you're building, the stack you're on, and where you'd like help. No deck, no obligation.
- 02
We share our experience
We walk you through relevant projects we have shipped, the approach we would take, and the trade-offs to expect. Honest about what we are great at — and what we are not.
- 03
Start work
Mutual NDA, a clear scope, and a start date. We begin shipping that week. Daily updates and a single point of contact throughout.
What clients say.
On fastapi developer work.
Verified Upwork reviews from teams we've shipped for.
"Great freelancer — proactive, thinks outside the box, and responds quickly. I hired them for the second time and will definitely hire again for future projects. Thanks!!"
"Great member of a team. Very honest, great communicator, and provides great work. Highly recommend working with Rishab!"
Verified Client
Node.JS Developer — Google Chrome Extensions, Firebase, GitHub
"Munish is an asset to anybody needing high-quality and correctly coded development. He’s a pleasure to work with and he’s always available and communication is very high. Thank you!"
FAQ.
Common questions.
FastAPI vs Flask vs Django?
FastAPI for typed async API services. Flask for tiny services where minimalism matters. Django when you need batteries (admin, auth, ORM, templates). FastAPI is our default for anything API-first in 2026.
How do you handle authentication?
OAuth 2.0 password flow + JWT for first-party APIs. OAuth 2.0 authorization code flow for third-party integrations. Auth0 or Clerk when offloading user management makes sense.
Can you use FastAPI for serverless?
Yes — Mangum on AWS Lambda, or Vercel Functions Python runtime. We design with cold starts in mind: lazy imports, connection pooling reused across invocations, minimal global state.
Async ORM — SQLAlchemy 2.0 or alternatives?
SQLAlchemy 2.0 async for most cases — it's mature, well-documented, and ergonomic. Tortoise ORM for Django-like simplicity. SQLModel when you want Pydantic + SQLAlchemy unified.
Background tasks?
ARQ for async-native task queues. Celery (sync) when integrating with an existing Celery setup. FastAPI's built-in BackgroundTasks only for fire-and-forget within request lifetime.
Performance tuning?
uvicorn with N workers (CPU-bound) or single worker + async (I/O-bound). Connection pool tuned to expected concurrency. Pydantic v2 (10x faster than v1). asyncio.gather for parallel I/O. Profile with py-spy before guessing.
How fast can a developer start?
For most roles, within 5–10 business days from the intro call. We pre-qualify our bench so onboarding is contracts and access — not a hiring search.
Do you sign NDAs and IP assignment agreements?
Yes — every engagement starts with a mutual NDA and a clean IP assignment clause. All work product is your property the moment it's written.
What time zones do your developers cover?
Our team primarily operates in IST with 4–6 hours of overlap with US Pacific, full overlap with EU, and full overlap with AU East. We commit to overlap windows in writing.
Related roles.
Also worth a look.
Ready to start?
Let's chat.
Tell us what you're building. We will reply within 24 hours, hop on a quick intro call, walk you through relevant work we have shipped, and take it from there.
Prefer email? info@techyor.com
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