Core
- React
- TypeScript
- Next.js
- Prisma
- GraphQL
- Cypress E2E
Senior Frontend Engineer · React · TypeScript · Next.js
Martin Kontsek
20+ years building production-grade, high-traffic applications. Expert in scalable frontend architecture across fintech and SaaS — currently on Erste Group's George digital banking platform. Heavy daily user of AI agents to accelerate development.
Based in Slovakia · open to US remote with strong EST overlap · seeking Staff/Senior opportunities.
About
Senior Frontend Engineer specializing in React, TypeScript, and Next.js, with 20+ years building production-grade, high-traffic applications. Expert in scalable frontend architecture across fintech and SaaS. Led large-scale migrations and monorepo consolidations on Erste Group's George digital banking platform. Proven ability to deliver complex projects ahead of schedule while maintaining zero downtime. Heavy daily user of AI agents to accelerate development. Based in Slovakia, open to US remote with strong EST overlap. Seeking Staff/Senior US-remote opportunities.
Key Achievements
- Led a full frontend framework migration across 2,000+ files in 3 weeks (vs. a 2-month estimate) on a high-traffic digital banking platform — completed with zero disruption to ongoing delivery.
- Consolidated multiple frontend applications into a single monorepo, implemented CI/CD Git workflows, and introduced a Cypress E2E testing suite, significantly improving development velocity and code quality.
- Designed and built multiple production SaaS applications (AI RAG chat, predictive data tools, insurance platforms) end-to-end using a modern Next.js stack.
Technical Skills
Other
- Rust
- Python
- Kubernetes
- Docker
- Git workflows
- Monorepo (Turborepo/Nx)
- Performance Optimization
- AI-Assisted Development
Domain
- Fintech / Digital Banking
- SaaS
- Insurance
Experience
George Labs (Erste Group) — Senior Frontend Engineer
2016 - Present
I architect and deliver scalable React/TypeScript/Next.js solutions across the Core, Products, and Investments domains for George, a major European digital banking platform. I transitioned legacy codebases to a modern React + TypeScript stack and built internal developer tools that improved team productivity, and I provide UX/UI feedback to product designers that refined user flows and component behavior. In parallel I ship independent SaaS products end-to-end: servisko.ai, an AI RAG chat app for service technicians (Next.js, Prisma, Postgres, Stripe, LangChain, Kubernetes); tryintuito.com, a predictive data-retrieval app where I managed 13 testers, onboarding, workflows, and Stripe payments; tryadvocate.com, an insurance platform consolidated into a monorepo with a Cypress E2E suite and deployment pipelines; and seasy.com, an Airbnb-style boat-berthing platform where I led the initial dashboard UI and GraphQL setup.
IBM — Application Developer / Lead
April 2014 - January 2016
I progressed from backend Java development and code reviews to frontend leadership (Dojo/RequireJS) and Scrum facilitation. I conducted candidate interviews, drove procurement, and led process improvements across multiple teams.
Turiec Group — Head of Software Development
2012 - 2014
I led small agile teams building web applications using Groovy/Grails, PHP, and modern frontend frameworks. I managed full-stack development, server administration, and external vendors. Earlier roles (2006–2012) are available upon request — focused on web/mobile development and team coordination.
Education
- • Master's Degree, Faculty of Mathematics and Physics — Charles University in Prague, Czech Republic (2004–2010)
Languages
- • English (Fluent)
- • Slovak (Native)
- • German (Elementary)