About
Eugene Leontev - Lead Ruby Engineer
Location: Tbilisi, Georgia
LinkedIn: linkedin.com/in/eugeneleontev
GitHub: github.com/madmatvey
Blog: madmatvey.github.io
Professional Summary
Lead Ruby engineer with 8+ years specializing in high-load backends, microservices, and fintech solutions. Proven track record of delivering 92% performance improvements, scaling systems to handle 5,000+ daily transactions, and leading cross-functional teams of up to 12 engineers.
Key Achievements
- Performance Optimization: Reduced database query latency from 250ms to 20ms, achieving 92% system throughput improvement
- Scalability: Architected USDT wallet processing 5,000+ daily transactions with 300+ deposits in first week
- Team Leadership: Led 12-engineer teams, delivering features 2 weeks ahead of schedule
- Growth: Drove 12x user growth through referral programs generating 50,000+ invites
- API Optimization: Slashed wallet API response time from 35-45s to 5-7s
Core Competencies
Backend Development: Ruby on Rails, PostgreSQL, Microservices Architecture
Cloud & DevOps: AWS, Kubernetes, CI/CD, Docker
Performance & Security: Query Optimization, OAuth, TRC20/ERC20 Integration
Leadership: Technical Team Management, Cross-functional Collaboration, Remote Team Coordination
Recent Experience
Principal Ruby Engineer | Fintech Startup (TRC20 USDT Wallet) | Sep 2024–May 2025
- Sole backend architect for Series A fintech startup
- Built secure USDT deposit system scaling to 5,000+ daily transactions
- Designed referral engine driving 12x user growth
Lead Ruby Developer | Wallarm (API Security) | Jan 2023–Mar 2024
- Led MySQL→PostgreSQL migration achieving 30% query performance improvement
- Implemented OAuth-based IAM supporting 100k+ daily API calls
Lead Ruby Developer | Eleving Group (Fintech) | May 2022–Dec 2022
- Redesigned core architecture for 92% throughput improvement
- Implemented PostgreSQL materialized views reducing query times by 80%
Team Lead / Senior Ruby Developer | Appbooster | Aug 2018–Apr 2022
- Managed 12-engineer team delivering releases ahead of schedule
- Integrated monitoring tools reducing average query time from 250ms to 20ms
Education & Training
B.Sc. Computer Science in Economics Urals State University (2005-2007) Computing Machines & Networks Novosibirsk State Technical University (2001-2004) AI Tools Workshop Delivered to 60 engineers with 75% adoption rate (2025) Remote Team Management Coursera & GitLab Certification (2024)
Languages & Availability
- Languages: English (B2+), Russian (Native)
- Availability: 9am-5pm EST / 2pm-10pm GMT for live collaboration
- Work Authorization: No sponsorship required
Personal Information
Male, originally from Siberia, Russia. Was a radio DJ, sound producer, musician and entrepreneur until 2015. Moved to Samara in 2015 and to Georgia, Tbilisi in early 2022, where I am to this day. Gamarjoba, genatsvale! მადლობა რომ კითხულობთ ამას!
I have a work permit as an individual entrepreneur in 🇬🇪 Georgia. I am considering 🇦🇷 Argentina as my next base camp.
Hobbies
Albert Einstein had a hobby of driving a sailboat. It helped him to understand how the universe works. I have a licence to captain a sailboat for recreational purposes. Here is the sailing school I chose and warmly recommend to those who want to really learn how to sail a sailboat, not just get a captain’s licence.
Playing guitar can stimulate creativity and provide a relaxing break from work. Sometimes I make short videos of me playing guitar, here’s one of them.
Sometimes on the weekends I stream live, play deejay live mix on my YouTube channel Lazy Beat. Subscribe, give me likes!.
CV
Feel free to download my CV