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IxxyDev/README.md

Yaroslav Denisenko

Senior Frontend / Fullstack Engineer with 7+ years building web products at scale. I work mostly in TypeScript, React and Node.js, with a soft spot for Rust and developer tooling.

πŸ“ Based in Tbilisi, Georgia Β· Open to relocation Β· Open to senior IC roles in product engineering or developer tooling


What I've shipped

  • Led frontend for products serving 9M+ and 100M+ users
  • Built B2B AdTech dashboards processing 2.3M data points/day with sub-second response time
  • Reduced presentation rendering time by 33.6% through Canvas API optimization
  • Cut deployment time from 3 hours to 25 minutes by introducing CI/CD
  • Reduced asset loading by 80% through caching and preloading at a 100M+ MAU social platform
  • Integrated modern React into a 15-year-old PHP codebase without breaking changes
  • Mentored 20+ developers at a major bank, taught 150+ students React/JS as a bootcamp instructor

What I'm working on

  • πŸ¦€ Contributing to Biome β€” Rust-based linter/formatter for the JS/TS ecosystem
  • πŸ”¬ Language implementation in Rust β€” see yoptascript-rs: lexer, parser, AST, tree-walking interpreter across a four-crate Cargo workspace
  • πŸ› οΈ Various dev-tool / performance side projects (V8 profiler, format parsers, backend experiments)

Tech I work with

Frontend β€” TypeScript, React, Next.js, Redux, MobX, Effector, Canvas API, Tailwind, Webpack, Vite Backend β€” Node.js, NestJS, PostgreSQL, Docker, GitHub Actions, Python Other β€” Rust, Go, Bun, Elysia Testing β€” Jest, Vitest, React Testing Library, Playwright

Selected projects

  • v8-simple-profiler β€” V8 deoptimization profiler comparing monomorphic vs polymorphic JS code paths, with statistical analysis and multiple report formats.
  • yoptascript-rs β€” Rust reimplementation of the YoptaScript joke language: lexer, parser, AST, tree-walking interpreter, four-crate Cargo workspace.
  • financial-rust β€” Multi-format financial transaction parser library in Rust (CSV ↔ binary ↔ text), plus CLI tools for conversion and comparison.
  • task-tracker-elysia β€” Task management API in Bun + Elysia + Drizzle, structured with Clean Architecture / DDD layering.

Education

MSc, Mathematics & Computer Science β€” Moscow Institute of Physics and Technology (MIPT), 2019

Get in touch

Pinned Loading

  1. financial-rust financial-rust Public

    Rust

  2. task-tracker-elysia task-tracker-elysia Public

    TypeScript

  3. v8-simple-profiler v8-simple-profiler Public

    Simple v8 profiler with deoptimization examples and benchmark

    JavaScript

  4. yoptascript-rs yoptascript-rs Public

    Rust

  5. biome biome Public

    Forked from biomejs/biome

    A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.

    Rust