Lab

Where reasoning meets practice

Hackathons, interview challenges, personal studies and experiments. Each one is a problem with constraints, a few decisions, code you can read, and what I took from it.

01 / 04

Hackathons

None published yet.

02 / 04

Interview challenges

BNPL payment platform, reference PoC

sezzle-interview-bnpl-reference-poc

A buy now, pay later flow scoped to about 36 hours as a reference for a technical interview: outbox, events, idempotency and full observability. Unfinished, and its README says exactly how far it got.

A reference proof of concept, not a statement about any hiring outcome.

Read the code

03 / 04

Personal studies

Event-driven orders platform

lab-event-driven-orders-platform

Microservices ordering with SAGA, outbox and CDC through Debezium, traced with OpenTelemetry and Grafana, on AWS infrastructure written in Terraform.

Read the code

Generic CRUD API in Go

go-lang-sandbox-generic-api-poc

A clean architecture and DDD foundation using Go generics for type-safe repositories, with JWT, rate limiting and PostgreSQL, MongoDB and Redis behind it.

Read the code

04 / 04

Experiments

LLM gateway with a semantic cache

llm-gateway

A semantic cache in front of an LLM gateway to measure the real cost delta, and the one query pattern where it confidently lied to users.

Read the code

Hiring for this kind of work?

The experience behind it, the roles and the CV are one page away.

See my experience