Machulskis Sergey

Engineering Manager | Go & Python | Cybersecurity & Distributed Systems

7 years leading teams (4–20 engineers). 10 years delivering impactful systems (1K+ RPS, 10M+ MAU) through cross-team collaboration.

Key skills:

Technical leadership: Owned the full system lifecycle — from 0→1 (architected 3+ systems, shipped v1.0) to 1→N (drove v2.0 upgrades, enforced SLAs, eliminated firefighting).
Reliability: Delivered uptime for 10M+ MAU systems by modernizing legacy, implementing SRE practices, and aligning roadmaps with business goals.
Team growth: Hired 2 teams, mentored dozens of engineers (most were promoted to senior roles), standardized hiring/onboarding, drove high team engagement via 1:1s, growth plans, and blameless postmortems.
Stakeholder leadership: Bridged engineering with product/executive teams — translated technical trade-offs into business outcomes.

Telegram: @neexee, e-mail: [email protected], GitHub: @neexee, LinkedIn: smachulskis.

Designed and delivered a web portal for national CERTs from concept to production. Coordinated work across 6 teams. Conducted regular stakeholder demos to gather feedback.
Modernized legacy systems:
- Improved API availability 10x through observability implementation and subsequent improvements.
- Cut firefighting time from 80% to 0% of team capacity by addressing technical debt.
- Created and executed a long-term roadmap to replace the legacy systems with a quality implementations.
Implemented agile practices to improve delivery predictability and quality (CI/CD, capacity planning, retrospectives).
Standardized developer interviews, wrote documentation for new hires, reduced onboarding time from months to days.
Aligned individual growth with company objectives on regular 1:1s.
Established tech talks, documentation standards, and rigorous code reviews.
Tech Stack: Python, Go, TypeScript.

Launched the Threat Intelligence Feeds. Bootstrapped architecture, client SDK, documentation, and deployment. Led the launch of the product.
Improved the Threat Intelligence Platform. Designed plugin system for enrichers and data ingestors. Established client SDK which allowed integration team to write dozens of plugins.
Conducted interviews, mentored developers, set technical standards.
Reduced uncertainty for stakeholders, developers, analysts and testers by writing timely architecture documentation and roadmaps.
Tech Stack: Go, Python, Redis, ClickHouse, PostgreSQL, k8s, OpenAPI.

Introduced standards addressing error handling, logging, data validation and API design.
Integrated third-party threat intelligence feeds into the platform.
Increased write/read throughput of core scenarios by two orders of magnitude.
Tech Stack: Go, Python, PostgreSQL.

Optimized CDN so the company could switch from monthly data updates to daily (20M montlhy active users, petabytes of served data).
Built cross-datacenter pipeline handling business statistics (3k+ RPS).
Delivered a geolocation service (2k+ RPS).
Tech Stack: C++14, Python, Go, Scala, Kafka, Redis, Tarantool, MongoDB, Ansible.

Novosibirsk State University

Community contributions

90+ articles in English and Russian.
120+ posts in Telegram channel.
100+ book reviews on Goodreads and Bookwyrm.
Created open-source organization and contributed to its projects. Contributed to mypy.
Taught university courses on operating systems, parallel programming, cybersecurity, and computing history.