Arkadiusz Przychocki
From: Poland
Location: Gdynia, PL
On Useme since 10 May 2026
About me
Senior Fullstack Developer (Java/Angular) with 4+ years of experience delivering enterprise-grade solutions for global Fortune 500 brands. Founder of the Exeris open-source JVM runtime.
I build high-performance web applications and premium websites without the enterprise bloat.
Core Focus: ⚡ Performance: Sub-second loading, 95+ Lighthouse score. 🚀 Modern Stack: Angular, TypeScript, Cloudflare (Zero WordPress). 📱 Mobile & SEO: Semantic HTML, Core Web Vitals, flawless responsiveness.
My Approach: I skip static Figma mockups and design directly in code. You get a functional, clickable product in the first week. We iterate on a live app together, saving weeks of unnecessary feedback loops.
What to Expect: ✓ Transparent, upfront pricing & fixed timelines ✓ Full source code in your Git repo upon completion
Ideal for startups, premium services, and businesses needing complex portals, multi-step forms, or dashboards.
📞 Let’s talk! 30-min intro call, portfolio demo, and a quote within
CV / Résumé
Mar 2025 - Now
Lead Engineer · Enterprise Component Library
Cognizant Technology Solutions Poland
Architecting and maintaining a React (Web + Native) component library used across a Fortune 500 specialty insurer. CI/CD on Harness + Kubernetes, mentored the team through a Java 25 migration.
Oct 2024 - Mar 2025
Cognizant Technology Solutions Poland
Key contributor on a greenfield high-volume aggregation backend at a Fortune 500 HR & finance platform (Java 21, Spring Boot, Thymeleaf SSR). Owned the reporting module end-to-end with an 80%+ test coverage baseline (JUnit, Mockito).
Aug 2023 - Jun 2024
Full-Stack Engineer (Fortune 500 payments network)
Cognizant Technology Solutions Poland
Core engineer on a JDK 6 → Java 17 migration of a mission-critical monolithic payment system at a Fortune 500 payments network (eleven JDK versions skipped). The JVM upgrade alone yielded a 35% page-load latency reduction.
Mar 2022 - Now
Full Stack Java & Angular Engineer
Cognizant Technology Solutions Poland
- Full Stack Java engineer on an internal HR platform serving the firm's Poland-region operations. Spring Boot, REST APIs, PostgreSQL.
Portfolio
Personal portfolio + technical blog on JVM, performance engineering and AI. Angular 21 zoneless, Cloudflare Pages, Lighthouse 95+. Features in-depth articles on distributed systems architecture and links to my open-source Exeris JVM platform project
SaaS for personal and business finance management with bank integration (Tink), cryptocurrency tracking, and LLM-powered transaction classification. Multi-tenant, GDPR-compliant. Built solo end-to-end on my own Exeris runtime platform.
Boutique webdev studio for small and medium businesses. Four clickable demos: medical booking, restaurant menu, law firm with multi-language, and AI-powered lead classifier. Angular 21, Lighthouse 95+.