Professional Experience

Detailed work history and project highlights.

Open for Opportunities

Available Now
Remote / Hybrid
  • Currently exploring new opportunities as a Senior Frontend Engineer.
  • Open to remote or hybrid positions with innovative teams working on challenging technical problems.
  • Particularly interested in roles involving complex UI/UX challenges, performance optimization, design systems, or team leadership.
  • Available for full-time positions starting immediately.
Balyasny Asset Management logo

Senior Frontend Engineer

Balyasny Asset Management

Mar 2025 – Feb 2026
Warsaw
  • Designed and delivered analytical views for portfolio risk analysis, translating complex financial requirements into decision-support tools used by ~1000 users.
  • Built internal React dashboards enabling exploration of large-scale financial datasets with AG Grid and custom visualizations.
  • Developed an advanced chart editor using Highcharts, supporting multiple visualization types (including candlestick, scatter, and bar) with configurable axes, data series, styling, and data selection.
  • Implemented efficient data fetching and caching using TanStack Query, ensuring responsive UI performance and efficient data handling for high-volume backend data.
GroundFog logo

Siemens

Ground Fog

Dynamic Solutions

Feb 2024 – Feb 2025
Warsaw
  • Led frontend development within a 10-person team (4 frontend engineers) on a global multi-application platform using Vue, TypeScript, GraphQL and Vite, mentoring developers and improving code quality via guidelines and CI/CD (linting, quality gates), reducing noise in PRs and improving review efficiency.
  • Delivered core platform features for siemens.com, including AI-powered search, chatbot interfaces, and live translation used across a global multi-language platform.
  • Built and evolved a shared design system (~30 components) used across multiple applications, enabling consistent UI development at scale.
  • Improved frontend quality and reliability by introducing visual regression testing (Playwright) and integrating checks into the CI/CD pipeline, reducing UI regressions in production.
  • Automated cross-environment content access via URL-based configuration, eliminating manual data migration and enabling direct access to production content in local environments, significantly improving development and testing efficiency.
Diva-E logo

Mann+Hummel

Diva-E

Dynamic Solutions

Sep 2023 – Jan 2024
Warsaw
  • Developed advanced product discovery features using React, TypeScript, and GraphQL, including VIN-based search, dimension-based filtering, and smart search across a large automotive catalog, improving product discovery and navigation across the catalog.
  • Built search results, product detail pages, and 360° product visualizations, improving product exploration and usability.
Dynamic Solutions logo

Websight CMS

Dynamic Solutions

Apr 2021 – Aug 2023
Warsaw
  • Led frontend development of a visual CMS built with React, mentoring a frontend engineer and collaborating closely with backend (OSGi-based) and design teams, including reviewing and guiding frontend-related contributions; primary contributor to core editor functionality.
  • Designed and built a drag-and-drop page editor with component tree and overlay-based editing on top of an iframe-rendered page, enabling content teams to visually create and manage pages without developer involvement.
  • Led frontend architecture evolution, including migration to TypeScript and React Hooks and refactoring core editor systems (actions, state management, ESM ↔ React integration).
  • Delivered core CMS capabilities including inline editing and content tree interactions, while ensuring correct rendering of embedded pages by dynamically adapting styles (e.g. normalizing viewport units inside iframe context).
OLX Group logo

Software Engineer

OLX Group

Dec 2019 – Jan 2021
Poznań
  • Developed authentication systems for a large-scale marketplace using Kotlin, Java and AWS Cognito.
  • Implemented core user flows including login, registration and password recovery.
  • Contributed to migration of millions of users to AWS Cognito and introduced security features such as suspicious login detection.
  • Enabled Customer Support to manage blocked users independently, eliminating 15–20 daily incidents previously handled by engineers.
  • Improved observability and error tracking using NewRelic and Sentry.
No Spoon Tech Lab logo

Full-stack Web Developer

No Spoon Tech Lab

Jun 2018 – Aug 2019
Spain
  • Developed a real-time chat application for an online gaming platform using React and KotlinJS over the XMPP protocol.
  • Designed and implemented messaging features including message synchronization, presence handling, and real-time updates across connected clients.
Appchance logo

Junior Frontend Developer

Appchance

Jan 2018 – May 2018
Poznań
  • Developed reusable UI components and client-side features using JavaScript and Ember.js across multiple projects.
Pearson IOKI logo

Junior Java Developer

Pearson IOKI

Jul 2016 – Dec 2017
Poznań
  • Developed REST APIs for an e-learning platform using Java, Kotlin, REST and MongoDB within a microservice architecture.
  • Delivered features in cross-functional Scrum teams (~20 engineers across two teams).