[ SENIOR SOFTWARE ENGINEER ]
Oleg Savelev Realtime / Transaction-heavy / Applications
Senior Software Engineer specializing in realtime and transaction-heavy applications. I build systems that stay predictable under load: live state, concurrent operations, payments, and settlement logic.
REALTIME SYSTEMS TRANSACTION-HEAVY APPS CONCURRENCY CONTROL PAYMENTS / SETTLEMENT CYPRUS / OPEN TO RELOCATION
01 / SELECTED SYSTEMS
Selected systems A few products where correctness mattered as much as speed: multiplayer state, settlement logic, analytics, and billing.
TON Raids Founder & Lead Software Engineer
Real-time multiplayer raid game inside Telegram with TON-based payouts, shared boss mechanics, and server-side game rules.
+ Designed a deterministic server-side combat engine with concurrency controls for simultaneous player attacks. + Implemented idempotent payout pipelines and transactional accounting for Boss rewards on-chain. 100% Settlement accuracy
Realtime Combat state sync
SYS_MONITOR // TON_RAIDS
> MATCHMAKER: ACTIVE [OK]
> CONCURRENCY_LOCKS: 0ms LATENCY
> WEBSOCKET_SESSIONS: 420/s
> BLOCKCHAIN_SETTLEMENT: IDEMPOTENT
NODE.JS TYPESCRIPT WEBSOCKETS REDIS POSTGRESQL PRISMA TON
TON PvP Game Founder & Lead Software Engineer
Real-time PvP game on the TON blockchain with instant matchmaking and deterministic match settlement.
+ Built room-based architecture for low-latency state synchronization in parallel games. + Matchmaking and deterministic match resolution resolved on the server. 350+ Active Players
< 100ms Match Matchmaking
NODE.JS TYPESCRIPT WEBSOCKETS REDIS POSTGRESQL TON
BestLanding Founder & Lead Software Engineer
Multi-tenant SaaS platform for landing page optimization, experimentation, and conversion analytics.
+ Architected multi-tenant Next.js 15 & Supabase platform with row-level security. + Optimized Core Web Vitals to achieve initial page load times under 1 second. 95+ Lighthouse
< 1s Initial load
NEXT.JS REACT NODE.JS TYPESCRIPT SUPABASE STRIPE VERCEL
CAP / 01 Backend & systems Node.js / Fastify / Express / TypeScript / C# / SQL REST APIs / GraphQL / event-driven systems / transactional workflows WebSockets / Socket.io / Redis / PostgreSQL Background jobs / task scheduling / concurrency control Idempotent processing / caching / rate limiting / observability
CAP / 02 Frontend engineering React / Next.js 14-15 / App Router / Tailwind CSS RSC / Server Actions / SSR / ISR / component systems Data-heavy realtime interfaces / frontend architecture Core Web Vitals / performance optimization / code splitting Playwright / Jest / client-side state synchronization CAP / 03 Cloud & delivery AWS / Google Cloud / Azure / Docker CI/CD pipelines / GitHub Actions Vercel / Railway / Supabase Health checks / logging / metrics / observability Security / incident handling / production operations Mission-critical monitoring and traffic-control systems for a global IaaS platform.
+ Built real-time dashboards for monitoring and controlling global network traffic using React, Next.js, and TypeScript. + Integrated live telemetry and backend event streams into low-latency operational interfaces. + Worked with backend engineers and network specialists on API contracts, data models, and failure scenarios. + Reduced load times by approximately 30% through optimized data fetching and modular frontend architecture. + Contributed to performance, deployment, and reliability decisions for a high-availability production environment. Marketplace platform connecting offline businesses with online consumers.
+ Built and scaled a marketplace with Next.js, Node.js, TypeScript, and PostgreSQL. + Developed merchant dashboards with real-time inventory synchronization for 1000+ products. + Added map-based discovery with Mapbox GL, increasing engagement by approximately 50% compared with list-based browsing. + Reduced response times by approximately 70% on high-traffic search endpoints through PostgreSQL query optimization and API pagination. + Contributed to product roadmap, delivery planning, and technical decisions as part of the founding team. Large-scale enterprise systems for nationwide postal services.
+ Developed and maintained React applications used across 1000+ branches. + Built internal tools and shared libraries that increased team delivery speed by approximately 40%. + Worked on backend services and performance optimization in high-load B2B systems. + Participated in architecture discussions, code reviews, CI/CD workflows, and incident resolution for mission-critical systems. Enterprise systems across public-sector, compliance, e-signature, and insurance products.
+ Developed WPF desktop applications and backend logic for business-critical workflows. + Worked with C# and SQL Server in regulated enterprise environments. EDU / 01 Bachelor - Information Systems and Technologies Moscow Technical University of Communications and Informatics
2012 - 2015 EDU / 02 Specialist Diploma - Software for Computer Science and Automated Systems Moscow State College of Informatics and Electronic Technology
2008 - 2012 LANG / ACTIVE
English Professional working proficiency
Russian Native