- Leading small, high-impact teams in enterprise environments
- Architecting microservice ecosystems across datacenters
- Driving capability growth, technical risk ownership, and zero-defect production
Side quests run as small experiments: a concrete question, a measurement setup, a written answer. Finished ones get archived; results stay public.
- payments-book - an open book (RU) on how payments actually work; DOI 10.5281/zenodo.19884844
- redis-failure-mode - measuring acknowledged-write loss in Redis, Valkey and KeyDB under failover and power loss
- pow - SHA-256 proof-of-work: Python reference vs Rust + SHA-NI solver, with honest statistics
- jwt-performance - what JWT/JWE verification actually costs inside Spring Cloud Gateway
- go-lgbm-serving - serving a Python-trained LightGBM model from Go, bit-exact, with native SHAP reason codes
- macdjvu - a native macOS DjVu reader, built because none existed worth using
- sre.pq3.ru - an interactive map of SRE practices as an explicit prerequisite graph
- Centralized core banking platforms (development, integration, rollout)
- Telecom OSS/BSS (SDN/ML R&D, orchestration prototypes)
- Large-scale contact centers (Avaya integration, custom dynamic IVR flows)
Experience spans systems performance, backend engineering, infrastructure design, and applied R&D.
This is a public notebook. Not a resume, not recruitment material.