Hi, I'm Lukash Onyshkevych
Technical Lead
I build scalable backend systems and lead engineering teams to deliver high-impact solutions. Specialized in distributed systems, API design, and data platforms that process millions of events daily.
About
With a strong foundation in mathematics and deep expertise in backend engineering, I specialize in building scalable distributed systems and API integrations. I've architected data platforms that process millions of events daily, scaling systems from thousands to millions of requests.
My work focuses on scaling distributed systems, optimizing performance, and designing robust integrations with enterprise APIs. I'm passionate about mentoring engineers, improving system architecture, and delivering technical solutions that drive measurable business value.
Experience
Tech Lead
BlueConic (acquired Jebbit)
July 2024 - Present
- Leading team that integrates real-time end user data with third-party and client-hosted CRMs
- Scaled application from 10k to 1M+ events/day
- Contributing to GDPR and SOC2 compliance initiatives
Senior Software Engineer
Jebbit
July 2023 - July 2024
- Architected and executed migration to ECS-based distributed services, improving uptime and enabling horizontal scaling
- Mentored junior engineers in software architecture and best practices
Software Engineer
Jebbit
January 2021 - July 2023
- Reduced data delivery latency from ~5 minutes to ~3 seconds
- Expanded third-party integrations suite by 25+ vendors
- Established performance monitoring infrastructure, improving code maintainability
Skills
Languages & Frameworks
Ruby on Rails, Java, C++, Python, JavaScript
Cloud & Tools
AWS (EC2, ECS, SQS, S3), Docker, NGINX, Terraform, GitHub CI/CD
Databases & APIs
PostgreSQL, REST, 100+ CRM APIs (Salesforce, HubSpot, Klaviyo, Marketo, etc.)
Testing & Quality
RSpec, Test-Driven Development, Code Review, Brakeman
Projects
chumbets.com
September 2025 - Present
Multi-tenant social platform for private friend groups to run prediction markets. Handles 250k+ requests/month with tenant-scoped data isolation. Virtual currency only. One paying customer. Live site →
Chess AI
March 2020
Chess engine built in JavaScript implementing minimax algorithm with Alpha-beta pruning optimization. Demonstrates algorithmic problem-solving and efficient game tree evaluation.
BitTorrent Client
2019
Full-featured BitTorrent client implemented in C, compatible with real BitTorrent clients. Implemented BitTorrent protocol including peer discovery, piece management, and file downloading. Built as part of a 4-person team, demonstrating collaborative systems programming and protocol implementation expertise.