Main focus: system integrity, not feature expansion.

Key improvements:

- enforced idempotent job execution (row-level locking, no double runs) - fixed queue processing guarantees (ack correctness + recovery) - ensured end-to-end consistency across API, worker, and storage - aligned all clients (SDK, CLI, UI) with backend capabilities - removed misleading or incomplete APIs

Also cleaned up developer experience: → full local environment runs with a single command → no manual setup, no hidden steps

Validated the system using quantum algorithms:

- Bell / GHZ (entanglement) - Grover (probability amplification) - Deutsch–Jozsa (function classification)

The interesting part wasn’t building features — it was making sure everything behaves correctly under real execution conditions.

That’s where most complexity lives. https://github.com/mareksuchodolski12-hash/kwantowy

#distributedsystems #backendengineering #quantumcomputing