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I Own the Part of the System
That Is Expensive to Get Wrong

Event ingestion, analytics, money, auth and tenancy, plus the gates and decision records that keep them correct after I move on.
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CaratOS - Stone-Level Cost and Journey Tracking for Diamond Manufacturing

CaratOS - Stone-Level Cost and Journey Tracking for Diamond Manufacturing

A multi-tenant operations platform for a diamond manufacturer, delivered in 21 days. Floor staff must never reach cost figures and a stone's cost has to follow its weight as it is cut, two constraints that ruled out the obvious design. 27 migrations with paired rollbacks, 54 row-level security policies, and an architecture gate that fails the build on a float column in a money schema.
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Latest from the blog

Thumbnail of Choosing the Event Store, and Reverting Half of It
Engineering Decisions
Choosing the Event Store, and Reverting Half of ItClickHouse is the obvious answer for an append-heavy event stream. We rejected it, wrote down the cost we were accepting, and then watched the compression prediction in our own decision record fail in production. This is what the record looked like, why the reversal was cheap, and what replaced the assumption.September 27, 2026
Thumbnail of Modeling Regulatory Uncertainty: The German Truck Toll Through 2031 and Beyond
Engineering Decisions
Modeling Regulatory Uncertainty: The German Truck Toll Through 2031 and BeyondWhen a single tax rate change moves your TCO calculation by hundreds of thousands of euros, you can't pretend the future is fixed. Here's how I built a fleet-decision tool that treats post-2031 toll policy as a user input, not a constant.April 15, 2026
@testdino/playwright - Streaming Playwright Results Out of CI

@testdino/playwright - Streaming Playwright Results Out of CI

The client half of a CI test-observability platform, published on npm. A Playwright reporter and CLI that streams each result as it completes, with dual-transport failover, byte-aware batching, and a liveness heartbeat that tells a slow test apart from a dead shard. Principal author across nine months alongside five other contributors.
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Driveline TCO - Alternative Drivetrain Comparison & Route Analysis Platform

Driveline TCO - Alternative Drivetrain Comparison & Route Analysis Platform

Client engagement for a Munich automotive firm. Engineering lead on structural improvements to an existing TCO comparison platform spanning seven drivetrain concepts for heavy commercial vehicles - consumption, total cost of ownership, route feasibility. Bilingual UI, 115 tests, deterministic models. Delivered ahead of schedule.
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Saral - AI-Powered Recruiting Search Platform

Saral - AI-Powered Recruiting Search Platform

Designed the platform architecture and owned backend, infrastructure, and the search data flow. Semantic candidate search over 119k profiles with progressive backfill, LLM fallback, and per-page credit billing.
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TestDino - AI-Powered Test Intelligence Platform

TestDino - AI-Powered Test Intelligence Platform

Forward deployed engineering from day one. Architected a SaaS platform handling 2M+ test executions for 80+ organizations. Built the backend, led the team, shipped to production.
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TestGenX - AI-Ready Parallel Test Execution Engine

TestGenX - AI-Ready Parallel Test Execution Engine

Platform engineering project: Built a distributed test execution system from scratch. 200 parallel VMs, 7 hours saved weekly, zero-touch automation.
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