Solution Architect  ·  Founder  ·  Stockholm

Filip
Kostrzewski

19 years building at the intersection of engineering excellence and product thinking. Currently architecting healthcare SaaS at Nordhealth while concurrently founding Wisegent — an AI-native B2B SaaS expanding across Europe.

Years in IT
Systems managed
Companies founded
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Engineering at scale,
leading with intent.

I've been writing code since 2003 — first HTML in high school, first paid sites before turning 16. Since then I've shipped products from zero to thousands of users, led engineering teams across timezones, and helped architect 150+ critical systems on a Tier-1 fiber backbone at Arelion.

Today I'm Solution Architect at Nordhealth, building cloud-based practice-management software for healthcare and veterinary professionals worldwide — while concurrently founding Wisegent, an AI-native B2B SaaS for the Swedish cleaning industry, with European expansion underway.

I believe great software is built by great teams. My approach: clear architecture decisions, ruthless prioritization, and creating environments where engineers do their best work.

Outside of architecture and code: calisthenics, board games, lockpicking, and shipping product.

Solution Architect Senior Fullstack Engineer Founder Tech Lead Open to work
about.json
{
"name": "Filip Kostrzewski",
"role": "Solution Architect",
"company": "Nordhealth",
"founder_of": "Wisegent AB",
"location": "Stockholm, Sweden",
"years": 19,
"systems": 150,
"status": "available",
"hobbies": ["calisthenics",
"lockpicking",
"board games"]
}
Available for select projects & advisory

19 years of building.

Nordhealth

Current
Solution Architect & Senior Fullstack Engineer
Sept 2024 – Present

Architecting and shipping fullstack features for cloud-based practice-management software used by thousands of healthcare and veterinary professionals worldwide. Reduced p95 latency on key endpoints by ~65%, cut deploy lead time from 40m to 20m via CI/CD modernization, and drove engineering culture through TDD adoption and AI-assisted code review (CodeRabbit) — all under strict healthcare compliance.

PHP Laravel Vue.js TypeScript InertiaJS MySQL Redis Docker

Wisegent AB

Current
Founder & CEO (concurrent)
2024 – Present

Founder of an AI-native B2B SaaS for the Swedish cleaning industry, with European expansion underway. Built solo end-to-end: multi-tenant Laravel/Vue web platform, dual React Native/Expo mobile apps (employee + customer), embedded LLM operations assistant (Inori) on NeuronAI, and a GTM stack with n8n marketing automation.

Laravel Vue.js InertiaJS React Native Expo OpenAI Claude n8n

Arelion

Solution Architect
Sept 2022 – Sept 2024

Executive decision-making team responsible for architecture & implementation of 150+ mission-critical network systems. Led a global workforce across multiple continents, drove cloud-first multi-cloud strategy (AWS + Azure), and owned the technical roadmap for one of Europe's largest fiber networks (formerly Telia Carrier).

Enterprise Architecture AWS Azure CI/CD Leadership System Scalability

Bolageriet

Senior System Architect & Lead Developer
Apr 2021 – Sept 2022

Modernized digital footprint and overhauled frontend architecture. Built and led a high-caliber development team, implemented UX improvements, and optimized workflows with modern tooling for a Swedish business registration platform.

Laravel Vue Node.js MS Azure TDD

Accenture

FE Development Associate Manager
Apr 2019 – Apr 2021

Led frontend teams in Client Delivery & Operations. Architected scalable internal frameworks, influenced tech directions in strategic meetings, and delivered high-impact solutions for major clients.

React Vue Angular AWS Leadership

Nexus Group

Lead System Developer
Jul 2016 – Apr 2019

Led cloud migration of legacy desktop applications to modern web. Built the web architecture from scratch, handled recruitment and training, and drove critical architectural decisions.

Vue Angular Docker MS Azure System Design

Vaimo

Senior Frontend Developer
Jan 2016 – Jul 2016

Delivered high-quality Magento solutions for leading Swedish companies. Improved team performance, consulted clients on tech choices, and elevated code standards across international teams.

Magento PHP JavaScript Agile

Prodi

CEO & Founder
2014 – 2024

Founded and ran my own IT consultancy in Sweden for 10 years (run in parallel with full-time roles). Full-cycle ownership: sales, architecture, development, delivery, and post-launch support for a diverse client portfolio.

Laravel Full-Stack B2B Entrepreneurship

CatScreen

Frontend / Backend Developer
2013 – 2014

First job in Sweden. Managed all client IT projects including websites, e-commerce platforms, and internal management systems. Designed and developed full-stack solutions daily and drove client IT strategy.

PHP Laravel JavaScript WordPress

eGrow

Frontend / Backend Developer
2012 – 2013

Designed and developed websites, e-commerce stores, and custom CMS solutions. Handled SEO services, tracking client rankings and improving search positions — full-cycle web ownership from day one.

PHP jQuery SEO E-commerce

AT7

CEO & Founder
2008 – 2011

Founded my first company after years of freelancing. Offered web development and SEO/SEM services under my own brand. One-man agency — sales, delivery, and everything in between. First real taste of B2B.

PHP SEO/SEM Web Development Entrepreneurship

Freelance

Web Developer
2003 – 2008

Started building websites in high school (Sopot, 2003). HTML → CSS → PHP → full-stack. Built sites for local businesses, earned first money from code at 15. This is where it all started.

HTML CSS PHP jQuery
Academic background
University of Graphic Design
Gdańsk, Poland
2007 – 2011
IT Vocational High School
Sopot, Poland
2003 – 2007

Full-stack. Cloud-native.
Architecture-first.

Architecture & Cloud

AWS Azure Docker System Design Microservices CI/CD Cloudflare GitHub Actions

Frontend & Mobile

Vue.js React TypeScript React Native Expo InertiaJS Tailwind CSS Vite

Backend & Systems

Laravel PHP MySQL Redis REST APIs OpenAPI Node.js Linux

AI & Automation

Claude OpenAI Cursor CodeRabbit n8n MCP servers NeuronAI

Leadership

Team Building Hiring OKRs Roadmapping Stakeholder Mgmt Agile / Scrum

Things I've built.

More coming soon

Currently heads-down building.

Reach out →

Let's build
something.

Whether you're looking for a solution architect, a technical advisor, or a co-founder — I'm always open to interesting conversations.

Currently available for select projects and advisory roles