Mgr. Tomáš Korec
Senior Software Engineer
- tom.korec7@gmail.com
- korec.dev
- linkedin.com/in/tomas-korec
- github.com/tom-korec
- Bratislava, Slovakia
Senior full-stack engineer with 8+ years building production React/TypeScript applications, including internet banking and fintech platforms. Focused on measurable impact — performance, accessibility, and code quality at scale — with a track record of owning features end-to-end and communicating directly with non-technical stakeholders.
Skills
- React
- TypeScript
- JavaScript
- Next.js
- HTML & CSS
- Tailwind / CSS-in-JS / SASS
- WCAG 2.1
- Figma
- Chart.js
- Vite
- Webpack
- Sentry
- Datadog
- Cypress
- Jest
- Playwright
- Node.js
- NestJS
- tRPC
- Prisma
- Firebase
- Docker
- GCP
- Claude Code
- AI-assisted development
- Git
- Jira
Experience
Senior React Developer · Creditas Digital Factory
React, TypeScript, Tailwind CSS, Orval, React Query, Zustand, Storybook, Figma, Azure, Claude Code
- Delivered production-ready frontend functionality for an internet banking application, with a strong focus on release quality and smooth deployments.
- Refactored under-owned parts of a 100K+ line codebase — component structure, shared utilities, naming conventions — reducing defects by 56%.
- Improved perceived performance across key banking flows by redesigning screens and introducing loading skeletons.
- Strengthened WCAG 2.1 compliance with ARIA labelling, keyboard navigation, focus management and colour-contrast fixes.
Senior Software Engineer · OAK'S LAB
React, TypeScript, Next.js, Chart.js, Material UI, Tailwind CSS, Node.js, tRPC, Prisma, GCP, Firebase, Datadog, Salesforce
- Took end-to-end ownership of core features in Nasdaq Private Market, partnering with stakeholders and an international team.
- Optimized a highly customized financial dashboard, reducing average loading time by 66%.
- Presented progress to high-level non-technical stakeholders after every sprint, ensuring alignment and trust.
- Integrated Datadog and Salesforce for production observability and customer-facing business workflows.
- Mentored 3 junior developers and delivered a new application MVP from architecture to deployment.
Software Engineer · Datamole
React, TypeScript, Chart.js, NestJS, WebSockets, Jest, Cypress
- Took ownership of a web application controlling a custom laboratory device — running, scheduling and monitoring experiments in real time.
- Optimized front-end architecture to process and visualize large datasets in real time (1,000+ data points per second).
- Ensured seamless integration of the web UI with the hardware device, working closely with hardware and backend teams.
React Developer · IPEX a.s.
React, TypeScript, Redux, Electron, Cypress, GraphQL
- Led a small frontend team developing a B2B portal for managing communication services, billing and customer support.
- Redesigned the frontend architecture with scalable, maintainable React patterns and standards.
- Introduced automated Cypress tests, reducing bugs reaching production.
Junior Full-stack Developer · Simplity
Developed a plugin management portal for ERSTE Group using React with Java.
Junior Java Developer · IBA CZ
Development of Java portlets for Liferay portal applications.
Education
Master's degree, Applied Informatics
Masaryk University, Faculty of Informatics
Erasmus exchange, Computer Science
University of Porto, Faculty of Engineering
Languages
- Slovak
- English