APIs & internal tools

Build the typed Python and FastAPI layer that business workflows need when no-code connectors stop being expressive, testable, or maintainable enough.

Starting point: Integration gap
Primary outcome: Maintainable service
Interface: Typed API contract

WHEN THIS FITS

The workflow needs code—not another brittle workaround.

Typical signals include complex validation, several APIs with different contracts, webhook normalization, reusable business rules, a lightweight operations console, structured persistence, or an internal service that must be tested and deployed independently.

WORKING PATH

01
Contract
Define callers, inputs, outputs, error states, authority, and acceptance tests.
02
Model
Design typed schemas, persistence, identifiers, and integration boundaries.
03
Implement
Build the smallest API or internal interface that closes the verified gap.
04
Prove
Test ordinary, invalid, duplicate, unavailable, and recovery paths.
05
Transfer
Package deployment, configuration, monitoring, and recovery knowledge.

EXPECTED DELIVERABLES

API and integration contract
Typed FastAPI endpoints and validation
Webhook receivers and normalized errors
PostgreSQL or SQLite data model as justified
Background processing only where needed
Authentication integration and access boundaries
Automated tests and structured logging
Docker packaging and health endpoint
Deployment, configuration, and recovery notes

GOOD FIT

A defined interface with real operational users.

The caller and downstream system are known.
Data ownership and access authority are clear.
Core rules and failure behaviour can be specified.
The team values tests and handover, not only a demo.

NOT A FIT

An entire undefined product hidden inside “one API.”

The request has no bounded user or outcome.
Security, compliance, or data authority is treated as someone else’s problem.
The scope assumes undisclosed integrations or unrestricted production access.
The only requirement is a fixed promise before discovery.

RELEVANT PROOF

Loopwatch is an inspectable FastAPI system.

The reference build demonstrates typed endpoints, SQLite persistence, operational events, API tests, a responsive interface, non-root Docker packaging, and documented production-hardening gaps. It is not client work.

Inspect Loopwatch

BEFORE A COMMITMENT

An API estimate is only as real as its contracts.

Pricing and schedule depend on endpoint count, data model, authentication, third-party limits, deployment environment, operational requirements, and acceptance tests. Those facts are documented before the owner approves commercial terms.

START WITH THE GAP

Describe what the existing tools cannot express safely.

Share the systems, data flow, desired interface, failure modes, and deployment constraints—without sending credentials.

Discuss the build