limefox0013

Staff Level Product Engineer | Frontend Architecture, Type Script & Solana

I'm a product builder and creative engineer with 14 years across frontend, backend and infrastructure. Frontend-rooted, I take ideas through UI, backend, tests and deployment, with a strong eye for UI/UX.

My recent independent work includes DBC Config Lab, an open-source Vue 3 / TypeScript Solana token-launch simulator. It replays eight real mainnet launches from on-chain history and reproduces every fee, amount and price exactly, with 741 unit and 94 Playwright tests. Code: https://github.com/LimeFox0013/dbc-config-lab

I also shipped an artist's production Nuxt portfolio with four locales and per-work SEO pages, and build and run a multi-tenant AI-agent platform with isolated workspaces, Keycloak/OIDC, model access and cost controls, and human-reviewed GitHub pull requests. Game Factory is an alpha on that platform: describe a Godot game in chat, let an agent build it, and play a live browser preview.

Previously, on a Fortune 500 client engagement at 5Blue, I improved a real-time visualization from lag at a few hundred interactive objects to tens of thousands of concurrently synchronized objects with almost no lag. Earlier at Provectus I set frontend architecture and engineering standards across SaaS product teams and built micro-frontends and data-heavy interfaces.

Core stack: TypeScript, JavaScript, Vue/Nuxt, React/Next.js, Node.js/NestJS, PostgreSQL, Docker, Kubernetes, Playwright and AI developer tooling. My blockchain experience is Solana.

I'm looking for remote, hands-on individual-contributor work in frontend architecture, frontend-led full-stack products, creative tools or AI developer platforms. EU-based remote, currently in Spain, available now; async by default. Employment expectation: EUR 90,000 gross annual base. Freelance scope and price follow the client's budget and requirements.

https://lime-fox.net | https://github.com/LimeFox0013


Experience: 11 years

Yearly salary: $96,000

Hourly rate: $70

Nationality: πŸ‡ΊπŸ‡¦ Ukraine

Residency: πŸ‡ͺπŸ‡Έ Spain


Experience

Senior Software Engineer
5Blue Software
2022 - 2026
May 2022 – September 2026, remote, Fortune 500 client engagement. Resolved a severe rendering-performance bottleneck in a real-time visualization system: from lag at a few hundred interactive objects to tens of thousands of concurrently synchronized objects with almost no lag. Drove frontend modernization and introduced generated, fully typed API clients. Built and handed over an AI coding-agent setup that took over a large share of routine frontend maintenance. Established quality gates for a days-long agent-driven refactor that split a monolithic feature into six independent sub-features, with zero regressions found.

Skills

ai
architecture
docker
javascript
kubernetes
nextjs
node
postgres
react
solana
typescript
vue
front-end
english
russian
ukrainian