Jan Komínek is a Freelance Senior Frontend Engineer based in Prague, Czech Republic, specializing in Vue.js, React.js, TypeScript, and Node.js. Currently available for part-time B2B contracts up to 10 hours per week.
Jan
Komínek.
Production-ready platforms, shipped without the agency overhead. EV charging networks, zero-trust data tooling, real-time dashboards — and the infrastructure that holds it all together.
Building DeepTrace at CORAC Engineering
Data-provenance & integrity platform for Earth Observation data — D3.js lineage viz, client-side hash-chain verification, zero-trust auth with AWS Cognito.
Built end-to-end. Deployed. In production.
Every project below I shipped — infrastructure, backend, and UI.
2024IONT info
Full-stack EV charging platform — public info app, payment gateway, admin panel, and Raspberry Pi hardware integration. Built the entire stack: SvelteKit, Fastify, Docker Swarm, MongoDB.
◆ Flagship 2025SITH DeepTrace
Client-side hash-chain verification, D3.js supply-chain graphs, and zero-trust auth for a sensitive EO data pipeline. 1yr+ ongoing, sole frontend engineer.
2024IONT charge
Public EV-charger payment gateway. ČSOB integration, Docker Swarm, Fastify + MongoDB.
2025Scorecard
Cyber audit tool. NIS2 compliance, PDF export.
2024Disenchantment
A minecraft plugin that enhances the vanilla enchanting system.
2024IONT admin
Charger control panel with real-time firmware updates and station diagnostics.
2024Noteful
Note-taking app with tag hierarchies & real-time sync.
2023Pangolin
Interactive analytics dashboard with complex data viz.
Senior ownership. No hand-holding required.
Part-time B2B engagements. I take full responsibility for the area I own — architecture, code, delivery, deployment.
Ship a new product from zero
Idea to production. I own the stack, ship the MVP, and deploy it. EV-charging platform: 0 to public launch in 5 months.
Fix what's broken — fast
Diagnose, stabilize, and set up the pipelines so your team can move again.
Grow the platform alongside the team
Ongoing fractional senior engineer — code review, architecture, and mentoring. Currently at CORAC Engineering & Intedat.
Real feedback from real teammates and managers.
Pulled directly from LinkedIn recommendations — unedited.
"We worked with Jan for several months on a complete system for electric vehicle charging stations. Jan is a skilled and thoughtful full-stack developer with an innovative approach to problem-solving and a strong team spirit."
"I've worked with Jan on two projects so far. On both occasions, his problem-solving skills and experienced approach shined through. He is familiar with a variety of tools and procedures and is excellent at explaining them thoroughly to less experienced team members. He is also eager to learn new technologies, always dedicated to finding solutions that work best for both the project and the team. Anyone would be lucky to have him! "
"I've had the pleasure of working with Jan at HAXAGON, where he worked as a vue.js front-end developer. I'm happy to recommend him for his amazing problem-solving skills and fast learning pace. He quickly picked up on new technology he hadn't used before and very quickly excelled at it."
"I am thrilled to offer a recommendation for Jan, a valued member of the Customer Portal team I've had the privilege to lead. Jan's standout qualities came to the forefront during his time at Precismo. His ability to tackle complex technical solutions and successfully overcome challenges was truly remarkable. Jan's proficiency in handling technical tasks was truly impressive and left a lasting impact on our projects. His problem-solving skills wer… Read more ↗
"I had the pleasure of working with Jan, a mid-level full-stack web programmer who is well-oriented in MySQL databases, JavaScript, TypeScript, and Node.js for backend development. As a valuable member of our Scrum-based web development team, Jan consistently demonstrated his ability to turn project requirements into successful web applications. His expertise in both frontend and backend development makes him a versatile asset to any team. I whole… Read more ↗