Hi! I am
Oskar Potratz-Zloch
Design Engineer | Front-End Engineer | UX/UI Designer
- Location:
- Poland, Gdańsk
Summary
Senior Frontend Engineer with over 5 years of experience in front-end development and UX/UI design, building high-performance responsive web applications. Expertise in implementing scalable frontend architectures, micro-frontends, and multi-brand design systems. Proven track record of optimizing performance (10x faster load times) and reducing user journey complexity (35% fewer steps).
Passionate about clean code, component-driven development, and mentoring peers. Experienced with REST/GraphQL APIs, CI/CD pipelines, and collaborating in international, cross-functional environments to deliver impactful solutions.
Experience
03.2021 - present
Front-End Engineer & UX/UI Designer At Hollaroo
Hollaroo is an enterprise talent engagement platform. Hosting private social networks for large organisations to pipeline, refer, onboard, and stay in touch with candidates.
Redesigned the entire platform in Figma and shipped it as 12 separate micro-frontends, delivering custom homepages for over 60 communities across 15+ tenants, each tailored to its use case and branding, while lifting page load speed by roughly 10x, from ~2s to ~200ms. checkout the migration here
Engineered a multi-brand design system, ensuring brand consistency across 15+ tenant configurations and sped up client handoffs by around 60%. checkout more here
Designed and built a fully typed form system with field-level validation, optimistic submission, automatic rollback, and form-splitting modals breaking long forms into smaller, sequential steps, making complex submissions feel more approachable - increased form completion rates by roughly 30%.
Overhauled the frontend’s accessibility posture, auditing it from negligible a11y coverage to WCAG AA conformance across all user flows
Reduced user journey steps by 35% on average per view, achieved through focused design and interactive UI.
Implemented a Turbo-monorepo sharing generic components across SvelteKit microfrontends, reducing development time by around 40% per implementation.
Expanded the core product into a fully responsive, mobile-first application, ensuring cross-device compatibility and seamless UX on all screen sizes.
05.2019 - 2021
Front-End Engineer & UX/UI Designer At Systems & Design
Systems & Design is a digital agency delivering design, app development, and web solutions for private clients and businesses.
Handled the full design-to-development pipeline for client projects, from wireframes and prototypes in Figma through to production-ready React applications.
Languages
Skills
TypeScript
JavaScript
HTML
CSS
Svelte SvelteKit
React.js
Next.js
Angular
Tailwind
Vite
Vitest
Playwright
git
Docker
Turborepo
GraphQL REST SPA Micro Frontends DRY SOLID OOP State Management WCAG Performance Optimisation CI/CD Component Driven Development Multi Brand Design Systems AI Integration (RAG) AI Powered Development
Figma Visual Hierarchy Composition Typography Responsive Web Design Mobile First Design Color Theory Information Architecture User Research Critical Thinking Agile SCRUMEducation
Uniwersytet WSB Merito Gdansk
Bachelor of Science - BSc, Computer Science
2016 - 2019
About me
I spent 4+ years as a digital painter, 3D generalist, and graphic designer before transitioning fully to software engineering. That background shapes how I think about interfaces, visual hierarchy, composition, and how I guide users through a workflow.
While having an artistic background I have always been a technical and scientific person, eager to create and understand processes.
Most of my work in 3D leaned mostly in material generation and writing shaders.
I think more than anything I always liked learning new tools to improve solving problems, and I still do.