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Python Backend APIs

Python Backend API Development

Python backends your team can own six months after we're gone.

We don't build throwaway prototypes. Every API we deliver is production-ready from day one — with test coverage, OpenAPI docs, structured logging, and a runbook your ops team can actually follow.

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What we build

Production-grade. Documented. Built to be maintained.

FastAPI & Flask REST APIs

Async endpoints, well-structured, OpenAPI-documented. Every route typed, tested, and deployable from day one. Not scaffolding — production code.

AI-Facing Backends

Endpoints integrating LLM providers, vector databases, and retrieval systems. Streaming responses, token management, retry logic, and fallback handling.

Authentication Layers

JWT, OAuth 2.0, RBAC. Security built in from day one — not retrofitted. Audit logs, session management, rate limiting, and permission scoping.

Data-Intensive Endpoints

Caching, rate limiting, pagination, performance monitoring. Built to handle production load — not just development traffic.

AWS Deployments

ECS, Lambda, or Kubernetes. Terraform-managed, auto-scaling, CloudWatch monitoring. Zero-downtime deploys with rollback capability.

Every delivery includes

  • Automated unit + integration tests
  • OpenAPI documentation
  • Environment configuration
  • Structured logging with trace IDs
  • Error tracking integration
  • Written ops runbook
Our standard

The bar isn't "it works." It's "your team can maintain it."

We've seen what happens when a contractor delivers code that only they understand. The ops team can't touch it. The engineers who inherit it are afraid to change anything. We build the opposite: code that's obvious, tested, and documented so any competent engineer can own it.

  • Every endpoint has test coverage before it ships
  • Documentation written alongside code — not after
  • Structured logging with trace IDs on every request
  • Runbooks written for your ops team, not ours

Tech stack

FastAPI Flask Python 3.11+ PostgreSQL Redis AWS ECS Kubernetes Terraform Docker pytest

Proven in production

Investor onboarding platform$900K+ revenue
Financial RAG API backend99.9% uptime
Document automation pipeline$500K saved
Proven in production

Backends running in production. With measurable outcomes.

US Fintech · Investor Onboarding Platform

Investor verification: months → hours. $900K+ revenue.

A US fintech company needed to reduce investor verification time across KYC, AML, and sanctions screening. We built the FastAPI backend on AWS/Kubernetes — fully compliant, zero incidents in production.

  • FastAPI + PostgreSQL backend — async, typed, tested
  • $900,000+ revenue processed through the platform
  • Full compliance audit trail on every verification event
  • Zero compliance incidents since production deployment
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US Fintech · Financial RAG API Backend

10 TB/week ingestion. 99.9% uptime. $20K/year saved.

The backend powering a financial analytics platform that processes 10 TB+ of market data weekly. Terraform-managed, CloudWatch-monitored, with automated S3 lifecycle policies reducing infrastructure costs by $20K/year.

  • FastAPI backend on AWS ECS with Terraform IaC
  • 99.9% uptime under continuous production load
  • $20,000/year infrastructure cost reduction
  • Full structured logging and CloudWatch observability
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Not ready for a full engagement?

Start with the AI Readiness Audit — $3,500

A 2-week audit of your data, infrastructure, and AI readiness. Full written roadmap with realistic effort and cost estimates — no retainer required. Take the deliverable to any team.

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A backend your engineering team can maintain. Not one they have to inherit.

We take a small number of projects at a time. Every client works directly with the senior engineer doing the work.

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