Lukash Onyshkevych
Technical Lead
Technical Lead with 4+ years of experience building scalable backend systems and leading engineering teams. Specialized in distributed systems, API design, and data platforms processing millions of events daily. Strong mathematical foundation with expertise in data-centric architectures.
Work Experience
Tech Lead
BlueConic (acquired Jebbit) July 2024 - Present- Leading team responsible for integrating real-time end user data with third-party and client-hosted CRMs
- Scaled application from processing 10k events/day to over 1M events/day
- Contributing to GDPR and SOC2 compliance initiatives, ensuring data handling meets enterprise security standards
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
Junior Software Engineer → Software Engineer
Jebbit January 2021 - July 2023- Reduced data delivery latency from ~5 minutes to ~3 seconds through performance optimization
- Expanded third-party integrations suite by 25+ vendors
Technologies: Ruby on Rails, AWS (EC2, ECS, SQS, S3), Docker, PostgreSQL, GitHub CI/CD, HTTP/REST, Terraform, RSpec. Proficient in over 100 enterprise CRM APIs, including Salesforce, Klaviyo, Marketo, Hubspot.
Technology Teacher
Chesapeake Science Point Public Charter School August 2018 - January 2021Developed curriculum for AP Computer Science, Technology courses, and Math Team competition prep. Taught 100+ students programming fundamentals and algorithmic problem-solving.
Education
B.S. in Mathematics and Computer Science
University of Maryland, College Park, MD May 2018Minor in Philosophy. Edgar Krahn Scholar; 4x Dean's List honoree.
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, over 100 CRM APIs (Salesforce, HubSpot, Klaviyo, Marketo, etc.)
Testing & Quality
RSpec, Test-Driven Development, Code Review
Projects
Multi-tenant social platform for private friend groups to create prediction markets and compete on leaderboards. Uses virtual currency only (no real money). One tenant is a paying customer. Live at chumbets.com →
- Prediction Markets: Multiple bet types (Over/Under, Moneyline, Bracket) with dynamic odds via Automated Market Maker (AMM), real-time updates, and event settlement
- Social Features: Multiplayer mini-games (Battleship, Blackjack), achievements, real-time notifications, messaging, and leaderboards
- Architecture: Multi-tenant SaaS with tenant-scoped data isolation, PWA with offline support, admin dashboards per tenant
- Scale: 250k+ requests/month, 50+ active users, ~10,000 transactions processed
- Security & Quality: Pundit authorization, comprehensive test suite, Brakeman security scanning, RuboCop Rails Omakase
Tech Stack: Ruby on Rails 8.1.1, PostgreSQL, Puma with Nginx reverse proxy, Hotwire (Turbo/Stimulus), Bootstrap 5.3.3, Pundit, AWS EC2, AWS SES, Capistrano
Chess AI
March 2020Chess engine built in JavaScript implementing minimax algorithm with Alpha-beta pruning optimization. Demonstrates algorithmic problem-solving and efficient game tree evaluation.
BitTorrent Client
2019Full-featured BitTorrent client implemented in C, compatible with standard BitTorrent clients. Implemented BitTorrent protocol including peer discovery via tracker communication, piece management and verification, and multi-peer file downloading. Built as part of a 4-person team, demonstrating collaborative systems programming, protocol implementation, and distributed systems concepts.