Principal Engineer (Core Systems)

Build the verification layer for physical commerce, source to recycle.

You will:

Architect the core from first principles

Model the real supply chain

Make the data impossible to fake

Ship it. Debug it in production. Carry the pager.

Set the engineering bar.

You have:

Built and run a complex production system yourself

Deep distributed systems, PostgreSQL, security and cryptography

Experience with complex real-world systems; supply chain, traceability, identity or regulated data is a strong advantage.

Scope

Scope: identity, provenance, IoT, AI agents, ERP, multi-cloud. One system, source to recycle.

TypeScript and PostgreSQL are the core. Everything else earns its place with evidence.

Apply

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Subject: Principal Engineer

Send: CV / GitHub, notice period, the hardest system you have built (what did YOU do?), and one hard technical decision and why.

No cover letter. Show the system.