How I Work

Ownership & scope

Interlining, an airfare limit-order engine and price alerts — each from schema to live feature, each still running.
De-facto owner of the money path since January 2020 — informal, no title, no reports.
All five design specs behind the accepted ADRs for a two-airline interlining engine are mine.
I integrated four bank payment providers into a provider-agnostic abstraction I did not design.
Where a system is not mine I say so — a colleague's response cache, a supplier hub I handed over.

Routine pull-request review on the money path.
A written design spec before the code whenever a decision is expensive to reverse.
Idempotency and race-condition hardening on money paths.
Findings from an external penetration test remediated — the response, not the report.
I have no public evidence of automated testing practice, and no claim to make about it.

I ship against live production traffic; the money path is never idle.
Behaviour goes behind runtime parameters, so a change can be enabled without a deploy.
Most of what I have built I still run.
I re-platform rather than rewrite where the read side can carry it.
Pipelines and containers are my record's gap: no CI/CD or Docker evidence to show.

I fix incidents on the systems I own. No formal on-call rotation — ownership, not a rota.
Bounded retry under a fixed cap; re-inquiry with the bank rather than assuming an errored call failed.
Gateway state persisted before the side effect, so a duplicate cannot slip through.
Concurrency held by Redis locks keyed on what they protect — the credit, or the account.
Serilog structured logging across the money paths, and a daily stuck-refund report to supervisors.

English in writing every day: specs, tickets, code review. No certificate.
I onboarded one to two junior engineers.
I exposed an admin API so the marketing team could run campaigns without a deploy and without me in the loop.
Operations tune eligibility on the limit-order engine themselves. I built the surface, not the tickets.
When retries exhaust, the customer is told. The system does not go quiet.