Sep 2024 – May 2025 · 8 mos · Remote · Remote

• Architected and launched fintech backend infrastructure supporting growth from 0 → 100K MAU in ~3 months under rapidly increasing transaction volume
• Designed fault-tolerant USDT (TRC-20) transaction pipelines with idempotent processing, reconciliation safeguards, and asynchronous recovery flows, scaling from ~300 to 5,000+ deposits/day
• Reduced transaction-heavy API latency from ~400–500ms to 3–5ms (~100× improvement) by redesigning PostgreSQL query execution paths, indexing strategy, and ORM boundaries
• Built near-fully automated financial processing infrastructure (~99.99% automation rate), minimizing manual operational overhead under high-growth conditions
• Improved payment reliability from ~5% failure rate to <0.5% using callbacks, monitoring, health checks, and async recovery mechanisms protecting revenue-critical flows
• Designed referral and reward infrastructure used by 50K+ users, contributing to rapid user growth and significantly higher retention among referred cohorts
• Introduced observability, deployment safety, and operational monitoring practices into a fast-moving financial environment with high reliability requirements

Jan 2023 – Mar 2024 · 1 yr 2 mos · San Francisco Bay Area · Remote

• Built and evolved backend systems for enterprise API security infrastructure operating under strict reliability and scalability requirements
• Designed and launched API security policy management workflows, enabling enterprise customers to configure and operate API protection at scale
• Improved observability and security signal clarity, reducing operational blind spots and accelerating incident investigation workflows
• Bridged API security and billing systems to support monetization of subscription-based security capabilities
• Reduced operational friction in distributed backend workflows by improving test infrastructure, container startup performance, and service coordination reliability
• Contributed to event-driven architecture initiatives improving scalability of asynchronous security processing pipelines
• Coordinated cross-service backend releases across API, billing, and security infrastructure in a distributed engineering environment

May 2022 – Dec 2022 · 7 mos · Tblilisi, Georgia · Remote

• Stabilized and optimized high-load fintech infrastructure supporting auto-loan processing workflows under strict reliability requirements
• Reduced system downtime by ~15% through monitoring improvements, failover hardening, and targeted production code audits
• Improved API response times by ~25% via PostgreSQL query profiling, caching strategies, and execution-plan optimization
• Resolved complex legacy-system failure scenarios, reducing manual operational workload by ~10 engineering hours per incident across multiple markets
• Took ownership of production-critical backend issues in a constrained legacy architecture environment, delivering reliable fixes under operational pressure

Oct 2020 – Apr 2022 · 1 yr 6 mos · Samara, Russia

• Led backend engineering for a high-load platform serving 10M+ users and ~8–10M requests/day under burst-heavy traffic patterns
• Improved critical API latency from ~250ms → ~20ms on endpoints executed 1M+ times/day by redesigning PostgreSQL queries, indexing strategy, and data-access patterns
• Increased user retention by ~30–33% by eliminating backend performance bottlenecks in critical engagement flows
• Designed scalable device-centric identity infrastructure reducing multi-account abuse and protecting acquisition-driven revenue streams
• Built server-side attribution and analytics pipelines enabling marketing optimization across large-scale paid acquisition systems
• Stabilized asynchronous event processing under high-load conditions through Sidekiq orchestration, worker isolation, and queue-performance optimization
• Improved AWS deployment reliability and release safety through rollout automation, autoscaling improvements, and infrastructure hardening
• Led cross-functional engineering team of 10+ people, improving technical quality, delivery predictability, and operational ownership across backend systems

Aug 2018 – Oct 2020 · 2 yrs 2 mos · Samara, Russia

• Promoted from junior to senior within 1 year based on performance and ownership in production systems
• Identified and resolved critical database bottlenecks, improving query performance and overall system responsiveness under real usage
• Contributed to internal engineering practices, documenting solutions and sharing performance optimisation approaches across the team