Backend engineer with 9+ years of experience building and scaling production SaaS platforms.

I specialize in designing reliable Ruby on Rails backends, optimizing PostgreSQL-heavy workloads, and building APIs that operate under real production load.

One example: improved a critical backend endpoint from ~250ms to ~20ms in a mobile backend called over 1M times per day by redesigning PostgreSQL queries and indexes.

📍 Tbilisi, Georgia
🌍 Open to global remote roles

LinkedIn: https://linkedin.com/in/eugeneleontev
GitHub: https://github.com/madmatvey
Blog: https://madmatvey.github.io/

Backend Development

• Ruby
• Ruby on Rails
• REST API architecture
• Service-oriented systems

Databases

• PostgreSQL
• Query optimization
• Data modeling
• Materialized views

Scalability & Infrastructure

• AWS
• Docker
• CI/CD pipelines
• distributed systems

Backend Systems

• Sidekiq
• background processing
• asynchronous pipelines

Selected examples from production systems:

• Reduced API latency 250ms → 20ms through PostgreSQL query optimization
• Improved endpoint performance 400–500ms → 3–5ms through architectural redesign
• Built backend systems handling 100K+ API requests per day
• Designed asynchronous processing pipelines for financial workflows
• Maintained 99.9% uptime for SaaS production services

Worked on a large-scale API security platform serving enterprise customers.

• Developed Ruby on Rails APIs handling 100K+ daily requests
• Contributed to API-first architecture for enterprise integrations
• Improved production reliability and observability

Architected and developed scalable Rails backends for production SaaS applications.

• Designed distributed backend services
• Built fault-tolerant background processing with Sidekiq
• Integrated external APIs and CRM platforms

Led backend development for a mobile growth and analytics platform.

• Improved backend performance 250ms → 20ms
• Introduced asynchronous processing pipelines
• Led engineering team of 12 developers

• scalable backend architecture
• PostgreSQL performance
• API design
• distributed systems
• AI-assisted software development

Technical notes and experiments:
https://madmatvey.github.io/

“All complex systems are built in small and relatively simple iterations.”

— Eugene Leontev