I design and build production-grade software: AI agents and automated workflows, CRM and ERP systems, SaaS products, and the APIs and backend systems that connect them.
Professional profile
I'm Jakub Kowalski, a Polish software professional focused on AI agents and automation, CRM and ERP systems, SaaS products, APIs, backend engineering, web and mobile applications, e-commerce, and production infrastructure.
How I approach software
I approach software as a complete system: the interface people use, the workflows behind it, the integrations connecting it to other platforms, the data moving through it, and the infrastructure that keeps it running.
The specific tools depend on the problem. The goal is consistent: software that is maintainable, understandable, reliable, and useful in real operations.
Background & Education
Built on rigorous engineering education and more than a decade of progressive professional experience.
I began my technical education in Poland at a five-year technical secondary school, combining general academic education with specialized technical training and culminating in the Matura examination.
I then went through Poland's two-cycle university engineering education: the Inżynier (Bachelor of Engineering) degree at Warsaw University of Technology, followed by the Magister Inżynier (MSc / MEng equivalent) at AGH University of Krakow — an advanced engineering qualification that combines strong theoretical foundations with practical technical education.
That foundation developed into more than a decade of professional engineering experience, progressing from hands-on implementation to independent engineering, architecture, technical leadership, optimization, and mentoring.
Education
5-year Polish Technikum programme and Matura examination
Early technical specialization combined with mathematics, sciences, general education, and practical technical training.
Education
Warsaw University of Technology · BEng equivalent · Computing and software engineering
First-cycle engineering degree building the mathematical, computer science and systems foundations of the discipline alongside practical technical work.
Education
AGH University of Krakow · MSc / MEng equivalent · Computing and software engineering
Second-cycle engineering degree continuing in the same discipline, with advanced study building on the engineering foundations of the first cycle.
Engineering
Implementation & learning
Built strong production engineering fundamentals through hands-on implementation, debugging, testing, maintenance, and collaboration with experienced engineers.
Engineering
Ownership & complex problem solving
Progressed toward independent ownership of increasingly complex systems, technical problem solving, integrations, architecture decisions, performance improvements, and delivery responsibility.
Technical leadership
Architecture, leadership & mentoring
Advanced into senior-level engineering responsibilities including architecture, complex system design, technical leadership, optimization, mentoring, cross-functional collaboration, and ownership of high-impact engineering work.
Engineering progression
2015–2017
Implementation & learning
2017–2021
Ownership & complex problem solving
2021–Present
Architecture, leadership & mentoring
Polish Engineering Foundation
My technical foundation comes from Poland's engineering-focused education system, beginning with specialized technical secondary education and continuing through both cycles of university engineering study — the Inżynier degree at Warsaw University of Technology, then the Magister Inżynier at AGH University of Krakow. The curriculum combined mathematics, computer science fundamentals, systems thinking, and practical engineering — foundations that continue to influence how I approach software architecture and problem solving today.
Context for the education system, not personal credentials.
The skills below are where this path leads today: 63 technologies across 9 disciplines, each taken from published project work.
Capabilities
How to read this
Every technology here is one the published projects are built with. Each sphere is filled to the level of professional capability it represents — a full sphere means senior-level, production experience.
AI agents, LLM workflows, retrieval and automation connected to business tools.
OpenAI
85%Advanced
Google Gemini
70%Strong
The languages the delivered systems are written in.
TypeScript
95%Expert
Swift
80%Advanced
Dart
70%Strong
Go
60%Strong
Kotlin
60%Strong
Python
60%Strong
Rust
60%Strong
Interfaces, design systems and the rendering and build tooling behind them.
Next.js
95%Expert
React
85%Advanced
PWA
80%Advanced
Tailwind CSS
70%Strong
Nuxt
60%Strong
Radix UI
60%Strong
Vue.js
60%Strong
Services, APIs, messaging and authentication.
Node.js
90%Expert
FastAPI
80%Advanced
Express
75%Advanced
Resend
75%Advanced
NestJS
70%Strong
WebSockets
70%Strong
Google Calendar
65%Strong
Google Maps
65%Strong
OAuth 2.0
65%Strong
REST
65%Strong
Spring Boot
65%Strong
.NET
60%Strong
Clerk
60%Strong
JWT
60%Strong
Mapbox
60%Strong
WebRTC
60%Strong
Relational and document stores, caches, vector search and data access.
PostgreSQL
95%Expert
Supabase
90%Expert
Firebase
85%Advanced
Redis
80%Advanced
MongoDB
80%Advanced
Prisma
65%Strong
Drizzle
60%Strong
Cross-platform and native mobile applications.
React Native
90%Expert
Expo
85%Advanced
Push Notifications
80%Advanced
SwiftUI
75%Advanced
Flutter
75%Advanced
Android
60%Strong
Capacitor
60%Strong
Offline Sync
60%Strong
Hosting, containers, infrastructure as code and delivery pipelines.
AWS
85%Advanced
Docker
85%Advanced
Vercel
80%Advanced
GitHub Actions
75%Advanced
Cloudinary
70%Strong
Railway
65%Strong
AWS CloudFront
60%Strong
Azure Functions
60%Strong
DigitalOcean
60%Strong
Netlify
60%Strong
Nginx
60%Strong
Terraform
60%Strong
Storefronts, checkout and payment providers.
Stripe
75%Advanced
RevenueCat
65%Strong
Paystack
60%Strong
Automated testing, monitoring and error tracking.
Sentry
65%Strong
Selected work
Disciplines
Projects across AI and automation, business systems, SaaS, backend engineering, commerce, web and mobile applications, and production infrastructure.
A selection of recent work. Open a project for the full case study, or see the complete gallery with filters by discipline.
A production-ready ai brand photo studio designed for independent brands and small agencies, with a focused workflow, polished UI and a backend built for real usage.
Alex · Northline Works
“The ai brand photo studio made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready ai resume tailoring assistant designed for job seekers and career coaches, with a focused workflow, polished UI and a backend built for real usage.
Rose · Brightfern Studio
“The ai resume tailoring assistant made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready adaptive fitness & nutrition coach designed for people following structured fitness plans, with a focused workflow, polished UI and a backend built for real usage.
Maya · Aster Ridge
“The adaptive fitness & nutrition coach made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready ai meal planner & grocery assistant designed for busy households with dietary preferences, with a focused workflow, polished UI and a backend built for real usage.
Theo · Cedar Loop
“The ai meal planner & grocery assistant made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready ingredient-to-recipe vision app designed for home cooks who want to use what they already have, with a focused workflow, polished UI and a backend built for real usage.
Lina · Oak & Signal
“The ingredient-to-recipe vision app made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready competitive intelligence research agent designed for small SaaS founders and product teams, with a focused workflow, polished UI and a backend built for real usage.
Jordan · Juniper House
“The competitive intelligence research agent made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready ai lecture notes & voice tutor designed for university students studying from their own lecture material, with a focused workflow, polished UI and a backend built for real usage.
Priya · Blue Finch Co
“The ai lecture notes & voice tutor made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready personal knowledge & memory assistant designed for professionals who save notes, photos, documents and voice memos, with a focused workflow, polished UI and a backend built for real usage.
Marco · Harbor Lane
“The personal knowledge & memory assistant made a complex AI workflow feel surprisingly simple. Our team could review results quickly and always understood what the system was doing.”
A production-ready study library operations system designed for independent study libraries and their members, with a focused workflow, polished UI and a backend built for real usage.
Elena · Maple Circuit
“We replaced scattered spreadsheets and messages with one clear study library operations system. The team learned the workflow quickly and finally had a reliable view of what needed attention.”
Around the world
Projects and collaborations can span industries, platforms, and borders. Explore locations connected to published work.
Locations
Select a highlighted location on the globe or in the list to see the work connected to it.
Where I help
What usually matters
Some projects start with an automated workflow, others with a CRM or ERP, a SaaS product, an API, an app, a storefront, or the infrastructure underneath. Most connect more than one.
Design and build AI agents, LLM-powered workflows, RAG systems, integrations, and process automation connected to real business tools.
Best suited for
Teams that want to automate multi-step processes and connect language models to operational systems.
Tool-using agents with clear roles, guardrails and approval steps
Retrieval over company knowledge with traceable sources
Build and extend business systems for customers, sales, operations, inventory, reporting, and cross-platform workflows.
Best suited for
Businesses that need their customer and operations data in one reliable system shaped around how they work.
Customer, sales and operations workflows
Integrations that keep business systems in sync
Develop multi-tenant software products from backend architecture and billing to dashboards, administration, and customer-facing workflows.
Best suited for
Founders and product teams building or growing a subscription software product.
Multi-tenant architecture with accounts, roles and permissions
Subscription billing and plan management
Design secure APIs, integrations, authentication, event-driven workflows, background processing, and scalable backend services.
Best suited for
Products and platforms that need dependable APIs, integrations and backend services.
Documented APIs with authentication and versioning
Event-driven workflows and background processing
Build responsive, high-performance web applications, dashboards, portals, internal tools, and interactive customer experiences.
Best suited for
Teams that need a fast, accessible web application their users and staff rely on daily.
Responsive interfaces built for performance and accessibility
Dashboards, portals and internal tools
Develop cross-platform and native mobile applications with reliable APIs, synchronization, notifications, and offline-capable workflows.
Best suited for
Products that need a mobile experience backed by the same reliable data and APIs as the web.
Cross-platform or native apps from a shared product design
Offline-capable data with synchronization
Build commerce experiences, marketplaces, subscriptions, payment integrations, checkout systems, and order-processing workflows.
Best suited for
Businesses selling online that need custom storefronts, checkout or payment flows.
Storefronts and headless commerce experiences
Checkout, subscription and payment integrations
Containerize, deploy, automate, monitor, and operate production applications across cloud and self-hosted infrastructure.
Best suited for
Teams that want repeatable deployments and applications that are observable in production.
Containerized services with automated CI/CD
Infrastructure as code for cloud or self-hosted environments
Quick answers
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Jakub Kowalski is a Polish software professional focused on AI agents and automation, CRM and ERP systems, SaaS products, APIs and backend engineering, web and mobile applications, e-commerce, and production infrastructure.
Next step
Look through the work and the systems behind it. The case studies show how each project was built and what it had to solve.