Microservice / API · 2026
PyHanko Service
Design & back-end development
- Python
- FastAPI
- AWS S3
- Docker
The context
Some needs can't be handled in the browser: legally signing PDFs, timestamping them with an authority, archiving them reliably. That calls for a dedicated, solid, invisible service.
The challenge
Building a safe, self-contained back-end brick: cryptographic PDF signing, certified timestamping, durable storage — all exposed through a simple API callable from any application.
My answer
- FastAPI (Python) API exposing signing and archiving.
- pyHanko for certified document signing and timestamping.
- PDF generation (reportlab) and AWS S3 storage (boto3).
- Containerised with Docker, deployed on Render, ready to scale.
The result
A discreet but critical service that does one thing and does it well. Proof that I don't stop at the front-end: I also design the back-end foundations and the infrastructure that go with it.