Michał
Zagalski
10+ years delivering high-performance web applications that drive measurable business results. Led performance engineering that increased user engagement by 23% and organic traffic by 35%. Deep expertise in scalable architecture, team leadership, and translating complex technical requirements into business outcomes.
Performance
100/100
PageSpeed Score
Experience
10+ Yrs
Full-Stack Dev
Location
Warsaw
Poland / Remote
Work Experience
01 // PROFESSIONAL JOURNEY
Lead Consultant / Contractor
Senior Full-Stack Engineer
May 2019 - Present
Warsaw, Poland
- DexPaprika (CoinPaprika): Collaborated with a product team of 5 to migrate real-time DEX explorer from Vue 3 to Nuxt 4 SSR on Cloudflare Workers. Led 8-phase performance optimization resulting in 23% increase in user engagement through sub-second load times (PageSpeed 100/100).
- CoinPaprika: Working with a cross-functional team of 8, architecting platform migration to Next.js using Turbo monorepo with modular packages. Coordinating migration roadmap with product and business stakeholders to ensure zero-downtime transition.
- GetName.pl: Sole technical lead reporting directly to founder. Built premium .pl domain marketplace with Web3 integration (Solidity, SIWE) and AI-powered domain valuation assistant. Delivered MVP in 8 weeks.
- sklep-internet.pl (DOMAR): Coordinated directly with business owner to plan and execute migration of legacy PHP e-commerce (8,000+ products) to modern stack with PostgreSQL and full-text search. Improved organic traffic by 35% through SEO-optimized architecture.
- LeoKlima.pl: Migrated HVAC company site with automated lead generation pipeline that increased qualified leads by 40%. Deployed on Cloudflare edge for sub-100ms response times nationwide.
- Veterinary Management System: Delivered end-to-end — from requirements gathering with clinic staff to production deployment. Built clinic management app with Stripe payments and business analytics dashboard.
Levitated.pl
Software Developer
2017 - 2019
Remote
- Developed PHP REST API for property geolocation.
- Managed CraftCMS websites and built a Django platform for personal trainers with Stripe payments.
Polcode
Software Developer
2016 - 2017
Warsaw, Poland
- Built a Yii2 coupon generation app and an Angular + Laravel volleyball coaching toolkit.
- Handled e-commerce bug fixes for legacy Laravel/jQuery applications.
Akademia Nauki
Software Developer
2015 - 2016
Warsaw, Poland
- Developed a Laravel mailing system for newsletter campaigns.
- Managed Moodle e-learning platforms.
Technical Arsenal
02 // SKILLS & TOOLS
Languages
Frontend
Backend
Edge & Cloud
Publications
03 // TECHNICAL WRITING
Open Source
04 // COMMUNITY CONTRIBUTIONS
nask-epp-client
Node.js client for NASK EPP (.pl domain management)
browser-curl
WAF resilience testing tool — validates web application firewall configurations by simulating real browser request patterns
parallel-requests
Claude Code skill: refactor sequential HTTP calls to parallel
Conferences
05 // CONTINUOUS LEARNING
Interests
06 // BEYOND THE CODE
Let's build something fast.
Currently open to senior roles, performance consulting, and high-stakes engineering projects.
Get in touch© 2026 MICHAŁ ZAGALSKI
BUILT WITH REACT + EXPRESS + TAILWIND V4
WARSAW, PL // 52.2297° N, 21.0122° E