Serge Skoredin

K8s,

• Designed event-driven architecture with 27+ microservices handling 150+ TPS

• Achieved p99 <100ms for payments via connection pooling and caching

• Cut infrastructure costs 25% through K8s optimization and autoscaling

• Built real-time fraud detection with pattern matching algorithms

• Implemented KYC/AML system: 1K+ daily verifications, 99.8% accuracy

• Reduced GC pauses 40% via memory profiling (pprof, trace)

• 87% test coverage: unit (testify), benchmarks, fuzz, integration (mtest)

• Led a backend team of 4 engineers building distributed system

• Migrated monolithic architecture to microservices, reducing deployment time from 2h to 15min

• Implemented distributed tracing reducing MTTR by 65% for production incidents

• Optimized database queries eliminating N+1 problems, reducing load by 70% during peak hours

• Built real-time inventory sync across 200+ integrated pharmacies using CQRS pattern

• Reduced page load time by 45% through smart caching and lazy loading strategies

• Implemented circuit breakers and retry mechanisms reducing cascade failures by 75%

• Established testing standards: 85%+ coverage, benchmark regression detection, load testing

• Built courier assignment algorithm optimizing delivery routes

• Cut checkout latency 30% using goroutine pools and sync.Pool

• Implemented distributed locking preventing overselling

• Improved API response 40% through query optimization

• Built real-time order tracking system using Kafka consumer groups Developed the first version of DarkStore with integration into store accounting systems for real-time updating of

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product balances