Since 2010
15+ Years Building
FastAPI Backends Built for Typed Speed
Async Python APIs with pydantic-validated contracts, generated docs that stay honest, and throughput that holds under load. Our default for ML-serving and high-traffic Python backends. Fixed written quotes, senior engineers.
- 15+ years
- Building Software
- 500+
- Engineers
- 25+
- Countries Served
- 100%
- Source-Code Ownership
Trusted by the brands we build for
A track record you can verify
9,000+
Projects Delivered
3,900+
Apps Shipped
500+
Engineers
insight
What FastAPI Backend Development Means at Moxace
FastAPI backend development at Moxace means async Python APIs where type hints drive validation, documentation, and client generation at once. The framework's contract-first design catches integration errors at the boundary, which is where production incidents usually begin.
Choose FastAPI for high-throughput APIs, ML model serving, and Python backends that need async I/O and typed contracts. We also migrate Flask and Django-adjacent services to FastAPI where the performance and typing payoff is real, and document when it is not.
What Every FastAPI Backend Development Engagement Includes
Scoped in writing before the first sprint. If it is not on this list, we will tell you exactly what it costs to add it.
Contract-first APIs
pydantic models defining request and response schemas, with OpenAPI docs and typed clients generated from the same source.
Async done correctly
Async endpoints, connection pools, and blocking-work isolation, so event-loop blocking never degrades your p99s.
Dependency injection
Auth, database sessions, and configuration composed through FastAPI's DI, testable at every layer.
ML model serving
Models behind validated endpoints with batching, versioning, and latency metrics built in.
Background tasks and queues
Slow work moved to task queues or background tasks, with retries and monitoring.
Performance verification
Load tests against target throughput run before every release, not after the first incident.
What You Can Build With FastAPI Backend Development
Representative outcomes our FastAPI Backend Development teams deliver.
Product APIs
Backends for web and mobile products that need Python's ecosystem at Node-like throughput.
ML and AI serving
Inference endpoints for models and LLM pipelines, validated and monitored.
Data processing APIs
Services exposing pandas and ETL workflows to other systems.
Microservice cores
Contract-driven services composing into larger platforms.
How the engagement runs
From first call to handover, with a working build to see every two weeks.
- 01
Scoping call
One hour on throughput targets and consumers, ending with a fixed written quote.
✓ step 01 complete - 02
Architecture blueprint
Schemas, data model, and async boundaries documented before code.
✓ step 02 complete - 03
Two-week build sprints
Working endpoints on staging every two weeks, with docs generated live from the service.
✓ step 03 complete - 04
Load and contract QA
Throughput and schema tests gating every release candidate.
✓ step 04 complete - 05
Launch and handover
Production deploy with metrics, plus full code, documentation, and IP ownership.
✓ step 05 complete
The adjacent stack we bring
FastAPI Backend Development never ships alone. These are the pieces we routinely wire around it.
FastAPI
Current framework with async-first design and dependency injection.
pydantic v2
Fast validation and schema generation from typed models.
SQLAlchemy 2 and alembic
Async ORM access with versioned migrations.
Uvicorn and docker
ASGI serving in containers with health checks and sane worker topology.
Locust
Load tests encoding your throughput targets in CI.
AI inside the build
Where models genuinely earn their place in FastAPI Backend Development work. Each ships wired to your data and sharpens as usage compounds.
LLM pipelines
Streaming completions, tool calling, and provider fallbacks behind typed endpoints.
Reads
Historic fastapi backend development usage data and product telemetry
Changes
Recommendations retrain as new data arrives, without a rebuild
Vector search services
Embedding and retrieval APIs over your vector store of choice.
Reads
Historic fastapi backend development usage data and product telemetry
Changes
Recommendations retrain as new data arrives, without a rebuild
Model inference
PyTorch and ONNX models served with batching and GPU-aware deployment.
Reads
Historic fastapi backend development usage data and product telemetry
Changes
Recommendations retrain as new data arrives, without a rebuild
Agent backends
Tool-using agent workers orchestrated through FastAPI services with audit trails.
Reads
Historic fastapi backend development usage data and product telemetry
Changes
Recommendations retrain as new data arrives, without a rebuild
Every build ships with
Standard inclusions on every engagement. Nine things you never have to ask for.
100% source code, full IP
The complete unencrypted codebase transfers to you, with documentation and deployment scripts.
Named senior team
The engineers who scope your build are the ones who write it. No bait-and-switch staffing.
Architecture blueprint
A documented system design covering data model, integrations, and scaling path, written before the first sprint.
Sprint demos every 2 weeks
A working build demonstrated every two weeks, so you steer continuously instead of waiting for a reveal.
QA and security testing
Automated and manual QA on every build, plus a security checklist on each release candidate.
CI/CD and monitoring
Pipelines, cloud deployment, alerting, and observability configured from day one, so launch is a rehearsed event.
Fixed written pricing
A scoped quote in writing before work starts. No hourly meter, no surprise invoices mid-build.
60 days support
A post-launch support window covering bug fixes and environment issues, standard on every engagement.
Handover documentation
Code, infrastructure, and runbooks documented so any team, ours or yours, can pick the product up cleanly.
Hire a dedicated team or run a Fixed-scope project
Both tracks deliver the same FastAPI Backend Development quality bar. The difference is control, timeline, and how the work is priced.
| Criteria | Dedicated Team (Hire) | Fixed-Scope Project |
|---|---|---|
| Best for | Ongoing FastAPI Backend Development work with evolving priorities | A defined outcome with a clear finish line |
| Pricing | Predictable monthly team rate | Fixed written quote after scoping |
| Team | Engineers embedded in your rituals and tooling | Our PM, our process, demos every two weeks |
| Flexibility | Reprioritize the backlog any week | Change requests estimated and scheduled |
| Source code and IP | 100% ownership on delivery | 100% ownership on delivery |
| Start time | Team in place within 1-2 weeks | Kickoff within days of the signed scope |
/10
Why Teams Choose Moxace for FastAPI Backend Development
Built by engineers who have shipped production software since 2010.
AI-first engineering
Where it genuinely helps, we fold AI into FastAPI Backend Development work, from assistants to automation, drawing on 120+ AI products already in production.
Senior-only staffing
You get engineers who have done this before, not a junior bench learning on your budget.
Ownership and cost
A fixed written quote, 100% source-code ownership, and no licensing strings on your own product.
Global delivery, local accountability
500+ engineers serving clients in 25+ countries, with FastAPI Backend Development work demoed live every two weeks.
FastAPI Backend Development FAQs
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