spinhireSenior Full Stack Engineer
About the specialist
Senior Full Stack Engineer with 8 years of experience. I build the whole product: the interface, the services behind it and the infrastructure they run on. Stack: .NET 9 / ASP.NET Core, React / TypeScript / Next.js, PostgreSQL, Kubernetes. • Author of nestjs-zod, the standard way to use Zod with NestJS, at 5.5M downloads per month. • X5 Group: Next.js platform with 7.5M monthly active users. I raised mobile Lighthouse Performance by 15–25 points, cut the JS bundle by 20–35% and reduced data-mapping errors in Sentry by 70%. • Built and ran two distributed platforms on Kubernetes on my own. Gameplay stayed in sync within 120 ms (p95) with 300 players at once, and 99.5% of workflows completed. Releases and rollbacks take under 3 minutes. • I ship production code with AI agents: I write the spec and tests first and review every diff. Five products were built this way.
Skills
Work experience
Independent — iGaming platforms — Platform & Full Stack Engineer
2023 – 2025 · Remote
Sole engineer on two products: Sigma Games and Gift Fight, a Telegram Mini App that launched with ~1,500 players.
Built 10 ASP.NET Core (.NET 9) services for payments, wallets and auth on PostgreSQL / EF Core, NATS and Redis. Money movement stays correct under concurrent requests.
Designed real-time gameplay on Socket.IO and Temporal: 120 ms p95 sync with 300 players at once, and 99.5% of workflows completed.
Set up infrastructure as code with Pulumi and FluxCD on Talos Kubernetes. Releases and rollbacks take under 3 minutes.
X5 Group — Senior Software Engineer, Frontend
04/2024 – present · Remote
Raised Lighthouse Performance by 15–25 points on key mobile pages of a Next.js SSR recipe platform with 7.5M monthly active users.
Cut the shipped JS bundle by 20–35% and reduced data-mapping errors in Sentry by 70% with stricter API contracts.
Built internal CMS interfaces in React that 100+ editors use daily, and added A/B testing to server-rendered pages without losing caching.
SberEducation — Senior Software Engineer, Frontend
09/2022 – 03/2024 · Remote
Built BFF endpoints and generated API types from the GraphQL schema in CI, so integration errors surface before release.
Reached Lighthouse Accessibility 95+ on the payment widget and raised performance of the Telegram web apps by 10–20 points.
Integrated SSO for a multi-tenant B2B marketplace and mentored mid-level engineers.
Haiku Dev — Senior Software Engineer, Frontend
10/2021 – 09/2022 · Saint Petersburg
Created a shared UI kit that 4 product teams adopted.
Standardized data fetching and state handling with Effector and GraphQL, and prototyped micro-frontends with Module Federation.
Freelance (Upwork) — Full Stack Engineer
03/2018 – 09/2021 · Remote
Delivered projects end to end, from agreeing scope with the client to support after launch.
Built a hotel CRM with drag-and-drop booking and server-side conflict checks, plus fiscal receipt printing with automatic reconciliation.
Education
Studies in Computer Engineering at South Ural State University (SUSU)
Preferred geography
Armenia, Cyprus, USA, Europe countries
Languages
English C1, Russian Native