About

Hi, I'm Alex. I build full-stack products end to end.

Senior full-stack developer with 8+ years building SaaS products and AI features. Based in Romania, I take freelance and contract work from clients across Europe and the US, and I am open to senior full-time roles. I have shipped for ING (through HCL Technologies), E.ON, Warner Bros. Entertainment and US startups. Two-time HackerNoon Contributor of the Year.

Portrait of Alex Cloudstar

Working as a freelance full-stack developer

Role
Senior full-stack developer
Experience
8+ years, since 2018
Based in
Romania, working with clients across Europe and the US
Available for
Freelance and contract work, consulting and senior full-time roles
Clients
E.ON, ING (via HCL Technologies), Warner Bros. Entertainment
Stack
TypeScript, React, Next.js, Node.js, NestJS, PostgreSQL, AWS, Claude API, MCP

Right now

Building

statusline-pro, a configurable status line for Claude Code.

Writing

Weekly posts on AI tooling, devtools and shipping software.

Learning

Going deeper on Python and LLM engineering: evals, fine-tuning and agent reliability.

Available

Taking on new contract work and open to senior full-time roles. Email me what you are building.

Experience as a senior full-stack engineer

Full timeline
  1. Senior Full-Stack Developer2020 – NowFreelance · SaaS products and AI features for clients
  2. Senior Full-Stack Developer2023 – 2024Omnisource Technologies · contract, full-stack features, remote team
  3. Senior Full-Stack Developer2022 – 2023E.ON Deutschland · contract, large-scale energy platform
  4. Frontend Developer2021 – 2022HCL Technologies · contract, ING Nederland design system
  5. Full-Stack Developer2020 – 2021Makeen · contract, client placements at Warner Bros. Entertainment

Tech stack

Full tech stack
Languages
  • TypeScript
  • JavaScript
  • PHP
  • Python
Frontend
  • React
  • Next.js
  • Tailwind CSS
  • Redux
  • Zustand
  • Storybook
Backend
  • Node.js
  • Express
  • NestJS
  • GraphQL
  • REST
Databases and ORMs
  • PostgreSQL
  • MongoDB
  • Redis
  • Prisma
  • Drizzle
Infra
  • AWS
  • Vercel
  • Docker
  • Azure
  • GitHub Actions
AI / LLM
  • Claude API
  • Claude Code
  • Vercel AI SDK
  • RAG
  • MCP

Need a senior full-stack developer?

Get in touch