Ömer ÇelikLead Developer | Enterprise systems architecture · Governed AI in software delivery

I build: enterprise .NET systems you can prove

I design and build enterprise systems on .NET: order management, workflow orchestration and integration. And I work on how a team can use AI in delivery while people still decide what reaches production.

See the work Read the writing

AI produces · people decide · the engine verifies. Goldpath lays the path, SpecDrift keeps it honest.

Practice

Six areas I work in, each with something you can open.

Architecture & integrationService boundaries, shared foundations, gateways and the contracts between systems.order platform Workflow orchestrationOne process per order, late answers from downstream systems, and the people in between.process per order Domain modeling & rulesA catalog on TM Forum's model, and business rules kept as data.rules as data Legacy modernizationReplacing a live system one service line at a time while it keeps taking orders.order management Quality & test strategyTests strong enough to decide what reaches production.green diff Delivery & operationsFrom first commit to production and keeping it running, with AI doing the typing and written rules deciding what is done.internal platform

Work

Case studies — context, decision, outcome. Client names withheld.

All work

Telco · Client · 2024 — nowReplacing a telco's order management while it keeps taking ordersI lead the teams replacing a legacy B2B ordering system with .NET microservices, one service line at a time, while the old system keeps running.2teams led, new platform and legacy10+engineers0disrupted live order flows Corporate learning · Internal platform · 2026 — nowAI-nativeOne engineer, every layer, three months to productionAn internal training platform I built alone with AI: backend, frontend, database, DevOps and operations, live in three months and running without trouble since.3months to production400people using it2000+automated tests

Open source

The code behind the practice, on GitHub.

All repositories

Goldpath2026

AI-native, spec-driven enterprise .NET accelerator — composable libraries, templates, AI skills and guardrails on a paved golden path. Not a framework.

C# GitHub

SpecDrift2026

Deterministic spec lint for manifest-driven golden paths — validates cross-artifact invariants and detects manifest-vs-repo drift, served over MCP. LLMs call it; it never calls an LLM.

ci-cddeterministicdeveloper-toolsdrift-detection

C# GitHub

Mediant2026

The free, modern CQRS mediator for .NET — Result pattern, pipeline behaviors, Native AOT and OpenTelemetry. A drop-in, MIT-licensed alternative to MediatR.

clean-architecturecqrscsharpddd

C# GitHub