Experience

A snapshot of the teams, products, and communities I've worked with over the years - from enterprise React apps to academic clubs and conferences.

Senior Frontend Developer @ HSBC

Apr 2025 - Present · Contract

Cracow, Małopolskie, Poland · Hybrid

Working at HSBC through Alten Polska as a Senior Frontend Developer consultant, focusing on modern React, TypeScript, and frontend architecture.
Building performant, scalable web applications using modern React and the TanStack ecosystem (Query, Router, Table) for data fetching, routing, and advanced UI behaviors.
Ensuring exceptional type safety and developer confidence through advanced TypeScript practices, including strict inference, generics, utility types, and exhaustive control flow.
Developing comprehensive test suites with Vitest, React Testing Library, and Jest, applying test-driven development (TDD) principles where feasible.
Driving maintainability and consistency through architectural ownership, coding standards, and contributions to shared internal tooling and patterns.
Collaborating within a cross-functional, international Agile team to deliver accessible, user-centered, enterprise-grade solutions.
Promoting engineering excellence through peer code reviews, design discussions, and regular knowledge-sharing initiatives.

Skills: React.js, TypeScript, TanStack Query, TanStack Router, TanStack Table, Vitest, React Testing Library, Jest

Jan 2021 - Apr 2025 · Full-time

Grew from intern to junior to frontend developer, taking on increasing ownership across multiple React and TypeScript projects.
Delivered scalable, user-centric applications that adhered to modern web standards and accessibility guidelines.
Developed responsive and accessible interfaces using semantic HTML, reusable styles, and WCAG-aligned patterns.
Contributed to global projects for companies like Crossover and Trilogy, focusing on high-quality, innovative software solutions.
Conducted accessibility audits and implemented improvements using tools like Google Lighthouse.
Created Rerousel, an open-source lightweight React carousel library valued for its simplicity and flexibility.
Authored comprehensive Cypress tests and maintained code quality using ESLint and best practices.
Modernized and debugged legacy codebases, including migrations from JavaScript to TypeScript for better safety and maintainability.
Designed intuitive features and UI screens in Figma, prioritizing responsive design, accessibility, and user experience best practices.
Supported the frontend team with smaller features, bug fixes, and UI polish early on, learning team workflows, Git practices, and production-ready standards.

Skills: React.js, TypeScript, Cypress, ESLint, Figma, Accessibility, Lighthouse

Jun 2023 - Jan 2024 · Contract

Cracow, Małopolskie, Poland · Hybrid

Spearheaded planning and development of a modern web application using React, Vite, and TypeScript, ensuring scalability and maintainability.
Owned frontend architecture, established best practices, and optimized build performance.
Mentored team members, provided technical guidance, and fostered effective collaboration.
Conducted code reviews to maintain high standards of quality, readability, and performance.
Proposed enhancements to improve user experience, performance, and overall functionality.
Streamlined the development process by integrating tools and workflows that boosted productivity.

Skills: React.js, TypeScript, Vite, Mentoring

Feb 2022 - Dec 2022 · Contract

Cracow, Małopolskie, Poland · Hybrid

Led development and architectural planning of a custom Jira app in the Atlassian ecosystem using Atlassian Forge, React, and TypeScript.
Designed and implemented the app architecture, delivering a scalable foundation and user-friendly interface.
Developed advanced algorithms to enhance functionality and ensure smooth user experiences.
Mentored junior developers and aligned the team with technical and project goals.
Helped LUQAM identify digital transformation opportunities and start their journey into software development.
Assisted in building an in-house development team, providing strategic guidance and foundational practices.

Skills: Frontend Development, Software Architecture, Atlassian Forge

Oct 2020 - Mar 2021

Cracow, Małopolskie, Poland

Designed the interface for a new employer database platform, a key part of IAESTE’s workflow.
Started development of a new landing page for the club, aligning design and implementation.
Gained experience working with a motivated academic team and building a network in the tech community.

Skills: Figma, React.js

Oct 2019 - Mar 2021

Cracow, Małopolskie, Poland

Worked on internal tools and initiatives as both a frontend developer and UI designer within the UXberries academic club.
Led frontend efforts across multiple design-focused projects, collaborating closely with UX enthusiasts and specialists.
Helped design and develop landing pages for the Ciemna Strona UX conference and the club itself.
Contributed to UX-focused projects that strengthened understanding of human-centered design.
Played a significant role in recruitment for both the club and the development team, supporting community growth.

Skills: JavaScript, Figma, Frontend leadership, UI design

Oct 2019 - Feb 2021

Cracow, Małopolskie, Poland

Co-organized the SFI Academic IT Festival, contributing to planning and logistics.
Collaborated with other organizers and spoke with invited guests to plan talks and sessions.
Gained experience in event logistics, communication, and community-building in the IT space.

Formal education at AGH University of Krakow, where I deepened my computer science foundations and had a great time in the AGH community.

Feb 2022 - Sep 2023

Thesis: "Review of selected features and capabilities of React library and examples of its implementation in cloud-based services" - an in-depth analysis of React as a JavaScript library for dynamic user interfaces, its evolution, integration with third-party tools, and practical usage in cloud environments, supported by example implementations hosted on GitHub.

Oct 2018 - Feb 2022

Thesis: "Development of the client-side of the Dose3D-Portal web application" - focused on building and extending the frontend for a web application that supports the Dose3D project in medical physics research at AGH, enabling precise radiotherapy dose planning through improved data storage, processing, and visualization tools for the project team.