Machulskis Sergey

Telegram: @neexee, e-mail: sergeym@tuta.io, GitHub: @neexee, LinkedIn: smachulskis.

Engineering Leader | Go & Python | Cybersecurity & Distributed Systems

• 7 years leading teams (4–20 engineers), 10 years delivering 10+ systems (1k+ RPS, 10M+ MAU) through cross-team collaboration.
• Engineered reliability: Defined and hit SLAs, eliminated firefighting.
• Multiplied knowledge: Mentored 20+ engineers, taught 4 university courses, wrote ~100 public articles + extensive internal documentation.

Experience

Positive Technologies

Team Lead | Expert Security Center (2024–Present)

• 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.
  • Cut firefighting time from 80% to 10% 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.

Lead Programmer | Threat Intelligence Platform & Feeds (2021–2024)

• 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.

Huawei Cloud

Principal Engineer | Security Automation (2020–2021)

• Architected SOAR for internal and external security operations.
• First engineer on team; hired and onboarded 7 engineers.
• Tech Stack: Java, Spring, Kafka, k8s.

Positive Technologies

Senior Programmer | Threat Intelligence Platform (2019–2020)

• 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.

2GIS

Senior Programmer | Company-wide Infrastructure Projects (2015–2019)

• 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.

Education & Community

Novosibirsk State University

• MSc Information Technology (High Performance Computing, 2015)
• BSc Information Technology (Systems Programming, 2013)

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.