Senior Backend Engineer

Senior Backend Engineer — Aether Data Systems

Seattle, WA | January 2022 – Present

• Designed and implemented a distributed event-driven message queue using Go and Apache Kafka, processing 500M+ daily events and improving message delivery reliability from 99.2% to 99.99%.
• Led a team of 6 engineers to re-architect a legacy monolith into a microservices architecture on AWS, reducing application deployment time by 45% and annual infrastructure spending by $140,000.
• Optimized slow-running PostgreSQL database queries and implemented Redis caching layers, which reduced average API response times by 38% and cut CPU utilization by 25% during peak traffic hours.
• Architected a secure OAuth2 authentication service, handling 2.5M concurrent active sessions while reducing token verification latency by 60ms and improving login success rates by 12%.

Backend Engineer — Novatek Software

Bellevue, WA | June 2016 – December 2021

• Developed and maintained core payment APIs using Java and Spring Boot, securely processing $12M in monthly transactions while maintaining 99.95% uptime across parallel application instances.
• Integrated Elasticsearch to power the platform's primary search engine, reducing search query latency by 45% and increasing user click-through rate on search results by 18%.
• Automated CI/CD deployment pipelines using Jenkins and Terraform, reducing average release cycle time from 5 days down to 2 hours and eliminating 90% of manual deployment errors.
• Refactored data synchronization batch jobs, which reduced nightly processing times by 40% (saving 3 hours per run) and resolved database deadlocks during high-load intervals.

Go, Java, Python, SQL, PostgreSQL, Redis, Apache Kafka, AWS, Docker, Kubernetes, Terraform, Git, CI/CD, Microservices, REST APIs, gRPC, Distributed Systems, Elasticsearch

High-Throughput Analytics Platform

Role: Lead Backend Architect

Tools: Go, Apache Kafka, Cassandra, Kubernetes

Architected a real-time analytics engine processing 1.2B data points daily, reducing page dashboard load times by 55% and server overhead costs by 30%.

Payment Gateway Integration

Role: Senior Backend Developer

Tools: Java, Spring Boot, PostgreSQL, AWS

Led the migration of the payment processing module to a multi-region setup, achieving 99.999% availability and reducing transaction failure rates by 24%.

• AWS Certified Solutions Architect – Professional (2023)
• Certified Kubernetes Administrator (CKA) (2021)

• Languages: English (Native), Ukrainian (Conversational)
• Volunteer Work: Technical mentor for local coding bootcamp initiatives (2022–present)
• Availability: 4 weeks notice