From idea to product no middlemen
10+ years building custom web apps, online stores, company websites, and MVPs for product teams and growing businesses across Europe. I drop into your engineering team and ship from week one — or take ownership of a build from scratch.
Senior across the modern web stack
10+ years of production experience across frontend, backend, data, and infrastructure. Here's what I work with day to day.
- Next.js
- React
- TypeScript
- Tailwind CSS
- shadcn/ui
- Astro
- Node.js
- NestJS
- Hono
- REST
- GraphQL
- tRPC
- PostgreSQL
- MongoDB
- Redis
- Prisma
- Drizzle
- Auth.js
- Clerk
- Supabase
- Firebase
- Stripe
- Sanity
- Payload
- Strapi
- Shopify
- Vercel
- Cloudflare
- AWS
- Docker
- GitHub Actions
- Vitest
- Playwright
- OpenAI
- Anthropic
- Vercel AI SDK
- React Native
- Expo
- TanStack Query
- Zustand
- Vite
Selected Work
Custom Marketplace Platform
Built a marketplace platform from scratch — custom matching, payments, and admin tooling for a fast-growing vertical market.
Social Platform for Wellness
Designed and developed a social network connecting teachers with students — profiles, scheduling, messaging, and content sharing.
Multi-Platform E-Commerce
Managed and optimized multiple e-commerce storefronts across Shopify and Magento — custom themes, integrations, and performance tuning.
Financial Analytics Dashboard
Designed and built a complex financial analytics dashboard processing real-time data streams for enterprise decision making.
What I Do
Senior Next.js + NestJS engineering for product teams. Mobile, cloud, and design available when the project needs them.
Custom Web Platforms
Senior full-stack engineering with Next.js, NestJS, TypeScript, and Node. I join your existing engineering team and ship from week one — or take ownership of a new product from architecture to launch.
Mobile App Development
iOS and Android apps with a focus on performance, usability, and shipping quickly without cutting corners on quality.
Cloud Architecture
Secure, scalable infrastructure on AWS, Azure, and Google Cloud — reliable, cost-aware, maintainable.
UI/UX Design
Clear, accessible interfaces grounded in user behavior and business goals.
Websites That Convert
High-performance websites and landing pages built for clarity, credibility, and results.
I design and build modern websites, landing pages, and marketing pages that explain your offer clearly, build trust quickly, and turn visitors into enquiries or customers.
Landing Pages
Focused pages for launches, campaigns, and lead generation, built around clear messaging and strong conversion paths.
Company Websites
Professional websites that present your business clearly, build credibility, and help the right clients understand your value fast.
Product & Campaign Pages
Pages for products, features, and offers that combine sharp design, fast performance, and content that moves people to act.
Whether you need a launch page, a polished company site, or a focused campaign page, I can handle strategy, design, development, performance, technical SEO, analytics, and CMS setup when needed.
Hi, I'm Patryk.
Engineer, not an agency.
I started Sprinx because I kept seeing the same problem: companies hiring offshore teams that could write code but couldn't own a product. I wanted to offer something different - a senior engineer you'd actually want in your standups.
I have 10+ years of full-stack experience shipping production software across e-commerce, marketplaces, Web3, social platforms, and SaaS products. I work as an independent contractor — I drop into your engineering team for the duration of a project, or take ownership end-to-end. Based in Wroclaw, one of Poland's leading IT hubs. You talk directly to me. No account managers, no layers.
How I Work
Planning
I map out requirements, define milestones, and align on scope so there are no surprises down the line.
Design
Interactive prototypes and system architecture, validated with your team before a single line of code is written.
Development
Clean, tested code shipped in two-week sprints with continuous demos and transparent progress updates.
Deployment
Production rollout with CI/CD pipelines, monitoring, and a structured handoff so your team can own it from day one.
Ready to build something solid?
Book a free consultation to discuss your project requirements and how I can help you build and scale.