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DIGITAL PORTFOLIO
Over 9 years of product web delivery experience. I work where frontend meets real product needs: architecture, CMS, migrations, testing, accessibility, and daily shipping.
Product frontend
9 years of experience with real products
CMS & content
Static and content-managed websites
Stability
Bugfixing, incidents, maintenance
Delivery
Tests, reviews, releases
In short
Four areas that best summarize my experience and day-to-day delivery profile.
From fullstack beginnings to frontend work in SaaS, e-commerce, and international CMS-driven systems.
React, Next.js, TypeScript, CMS platforms, dashboards, and user flows that have to work in real products.
Next.js migrations, SSR, micro frontends, state management, and legacy cleanup.
Testing, accessibility, maintenance, stable releases, and communication with product teams.
Work areas
I most often work on product frontend, modernizations, CMS integrations, dashboards, testing, and post-release application maintenance.
Interfaces, components, application states, and user flows in real web products.
Migrations, legacy cleanup, CMS integrations, and work within existing platform constraints.
Testing, accessibility, maintenance, defect fixes, and stabilizing applications after releases.
Work experience
Key roles and responsibilities, from fullstack starts to frontend work for products running on multiple markets.
08.2025 — present
10 months
Japan Tobacco International
Senior L3 Frontend Engineer
Maintaining and improving the frontend part of Ploom websites across 30+ markets.
Fixing e-commerce defects: product cards, banners, CTAs, tracking, and layout regressions.
Debugging configuration issues in Builder.io and AEM.
Refactoring global UI components for accessibility and maintainability.
Keeping unit and integration tests stable for safe releases.
Technical communication with content teams and internal clients.
Impact
Technologies:
11.2024 — 08.2025
10 months
Roboverse Reply DE
Freelance Fullstack Developer (React/.NET)
Remote robot platform modernization: Next.js migration, state-management rebuild, legacy cleanup, and live control/preview features.
Migrated 7 major modules from vanilla React to Next.js / SSR.
Rebuilt state management from Recoil to Jotai with domain decomposition.
Removed 15–20% of unused or outdated backend code with team alignment.
Fixed around 109 existing platform defects over 10 months.
Implemented drone control via Gamepad API and live camera feed integration.
Impact
Technologies:
03.2023 — 10.2024
1 year 8 months
NapoleonCat
Senior Frontend Developer
SaaS product frontend: analytics module, global notifications, micro-frontends, Storybook, and regular production releases.
Built the new analytics module frontend based on Design System prepared by UI/UX.
Created dashboard components and widgets for multiple chart types.
Implemented global notifications with Firebase Messaging.
Supported a shift to micro-frontends with Turborepo and Module Federation.
24 production releases and around 75 components maintained in Storybook.
Impact
Technologies:
10.2021 — 09.2022
about 1 year
Merixstudio
Senior React Developer
Backoffice frontend for gamification platform: forms, campaign system, integration testing, and dynamic campaign scripts.
Expanded campaign system from 7 to 10 campaign types.
Built and maintained advanced forms with React Hook Form and Redux Toolkit.
Added around 50 integration tests.
Developed dynamic campaign scripting in Preact.
Handled roughly 250 active campaigns monthly across 18 operators.
Impact
Technologies:
04.2020 — 09.2021
1 year 6 months
Netguru
Mid Frontend Developer
Frontend for crowdfunding, real estate and Salesforce analytical tools.
Developed Hero5 platform and configurable campaign templates.
Built Salesforce analytics features, including metrics and visualizations.
Implemented dashboard admin layers.
Worked with unit and integration tests.
Impact
Technologies:
04.2018 — 03.2020
almost 2 years
Trol Intermedia
PHP/Frontend Developer
Frontend, UI and PHP/MySQL modules for e-commerce on custom 2ClickShop CMS.
Built stores and modules for brands including Neonail, Świat Zabawek and Zabawki Panda.
Implemented Infinite Scroll for 2ClickShop stores.
Launched the complete GlinianaKura.pl store.
Integrated product catalogs, carts, and payment flows.
Impact
Technologies:
03.2017 — 11.2017
9 months
LEOCODE / 314 Apps
Ruby on Rails/Frontend Developer
Fullstack beginnings: Ruby on Rails and Angular applications for international clients, including dashboards, admin panels, and service tracking.
Developed Soap.ly, a platform for mobile car detailing ordering.
Implemented real-time service tracking and notification flows.
Worked on Lifetramp.com with Ruby on Rails and Angular 1.6.
Built user dashboards, admin panels, and operational features.
Impact
Technologies:
Technologies and tools
Technologies and tools used in commercial frontend work: migration, testing, CMS, e-commerce and product integrations.
Interface layer, components, views, and day-to-day user experience delivery.
State models, forms, cache, API integrations, and product data flows.
Testing, accessibility, component documentation, and release confidence.
Migrations, frontend architecture, and practices that make products easier to maintain.
Content, commerce, configuration, and integrations around real business workflows.
Supporting technologies from modernization, integrations, and earlier fullstack work.
