I'm Aleksandr Baumgertner, a Senior Full-Stack Engineer with 10+ years of experience.
I build and modernize digital products — from fast-moving MVPs to enterprise-scale platforms.
I specialize in React, Next.js, Node.js, and TypeScript, and I work with AI agents as a core part of my development workflow.
I'm driven by feedback from end users and care about the whole delivery cycle — from spec and code to monitoring and collecting feedback.
I like lean teams where speed, clarity, and quality matter, and I enjoy building processes that leave room for experimentation without letting quality slip.
- 📐 Spec-Driven Development (SDD): I start from a spec, not a prompt. With GitHub Spec Kit I take features through specify → plan → tasks → implement, one spec at a time, so AI-generated code stays reviewable and traceable back to requirements.
- 🧠 Claude Code: agentic, multi-step work — larger features, refactors, and spec runs where thoroughness matters more than speed.
- ⚡ Cursor: fast, in-editor iteration and tight feedback loops for day-to-day spec-driven work.
- ⚖️ Compared both hands-on on real projects — I pick the tool per task, not per hype.
- 🛠 Shipped Next.js + Payload CMS projects end to end with an SDD workflow, deployed on Vercel.
- 🧪 Also in the toolbox: v0.app, Codex.
- 🚀 Startups (1–30 ppl): launched products from scratch with tiny teams (1 designer, 1 tester, me). Handled task management, infra setup, hiring, and more.
- ⚙️ Mid-sized (eLama, 200+ ppl): led performance optimization & architectural refactors to support scaling.
- 🏢 Enterprise (EPAM, 60k+ ppl): contributed to digital transformation, modernized legacy stacks, improved onboarding & infra.
- 👨🏫 Mentored 10+ juniors into their first roles and interviewed 30+ candidates.
- 🎓 Passionate about EdTech & modern learning approaches.
- ⚛️ Frontend: JavaScript / TypeScript, React, Next.js
- 🖥 Backend: Node.js, Next.js, Payload CMS, MongoDB/Mongoose, PostgreSQL/Drizzle ORM
- 💡 HTML/CSS: responsive layouts, accessibility
- 🤖 AI: Claude Code, Cursor, GitHub Spec Kit, v0.app, Codex
- 🔁 CI/CD: GitHub Actions, Vercel
- 🎓 Education: mentoring & onboarding juniors