Michał Zięba.

About
Me.

Senior Software Engineer with over 15 years of commercial experience. I specialize in frontend development (React) with a strong full-stack background. My focus is on building scalable SaaS and E-commerce platforms, handling complex system migrations, and modernizing legacy architectures.

DOWNLOAD CV

Experience

Senior Frontend / Full-Stack Engineer

Userlane (SaaS) | Current (2021 - ) | Munich, Germany (Remote)
  • Key Highlight: Designed and delivered a complex browser extension tightly integrated with the core SaaS product.
  • Develop a large-scale Digital Adoption Platform with a substantial user base.
  • Lead frontend development in React, with focus on performance and maintainability.
  • Designed and delivered a browser extension integrated with the core product.
  • Contribute to backend services (PHP) and data-heavy features.
  • Apply automated testing and AI-assisted development tools in daily work.

Senior Software Engineer

Flaconi (E-commerce) | 2015 - 2021 (6 years!) | Berlin, Germany (Remote)
  • Key Highlight: Key contributor to a massive Magento 1 → Custom React architecture migration for an enterprise e-shop.
  • Worked on a high-traffic enterprise e-commerce platform.
  • Contributed across product, order, and storefront services.
  • Key contributor to major migrations: Magento 1 → Magento 2 → Custom React solution.
  • Focused on performance optimization, scalability, and gradual legacy replacement.

Software Developer

StrefaUrody.pl | 2014 - 2015 | Rzeszów, Poland
  • Key Highlight: Built and launched a complete, custom e-commerce engine from scratch.
  • Built a full e-commerce platform from scratch for a cosmetics wholesaler.
  • Implemented catalog, checkout, orders, payments, and admin workflows.
  • Owned architecture, development, and long-term maintenance.

Software Developer

Aldeo Sp. z o.o. | 2013 - 2014 | Rzeszów, Poland
  • Key Highlight: Developed core features for a large-scale electronic school journal SaaS used across Poland.
  • Maintained and extended an electronic school journal SaaS application.
  • Worked on a document workflow system.

Full-Stack Developer

ProART sp. z o. o. | 2010 - 2013 | Rzeszów, Poland
  • Key Highlight: Full architectural ownership of multiple agency-driven web applications and CMS projects.
  • Developed websites, CMS systems, and a document workflow system.
  • Worked across PHP backend, JavaScript frontend, databases, and Linux servers.

Skills Matrix

Frontend

React & Next.js Ecosystem TypeScript (Strict Architecture) Modern CSS (Tailwind) Browser Extension Engineering Web Performance & Core Web Vitals Optimization

Backend

Scalable Node.js (NestJS / Fastify) Legacy PHP Modernization & Migration Distributed Systems & GraphQL / REST APIs Database Architecture (SQL & NoSQL) Cloud-Native CI/CD

Business

Digital Adoption Platforms (DAP) Strategy Headless E-Commerce & Payment Orchestration CRM Architecture & Custom Integrations Fintech / Checkout Systems Automated Document Workflows & Management