Product development at Opera
I work on internal, non-public tooling with an AI and agentic development focus. Details remain intentionally high-level.
Product Engineer positioning
Grzegorz Kaczmarek
Product Engineer, Product Developer & Founder
I build products, software and the systems around them.
Product Developer at Opera Software. Founder of GKD and Skrzynka Spółdzielni. My roots are in frontend development and homelab work, and I care deeply about great experiences and simplicity in software.
About
Hands-on product building across company, client and founder work.
I work where product decisions and implementation meet: shaping scope, building useful interfaces, connecting systems and keeping delivery practical. My roots are in frontend development and homelab work, and I am passionate about great experience and simplicity in software.
Building now
Three current tracks.
Client products through GKD
I founded GKD Agency to build websites, web applications, automation and AI-assisted workflows for SMBs and startups.
Visit GKDSkrzynka Spółdzielni
I am building a role-based work-order and maintenance operations product for housing cooperatives, owning product discovery, architecture and MVP development.
Visit product siteWhat I bring
Practical judgment for product teams and client work.
Product thinking
Clarifying users, constraints, scope and trade-offs before implementation.
Frontend architecture
Designing accessible interfaces with maintainable component boundaries and predictable behavior.
Automation and reliability
Using automation and testing to shorten feedback loops without hiding product risk.
Full-cycle ownership
Staying involved from discovery and implementation through release and maintenance.
Stakeholder communication
Keeping decisions, risks and delivery state understandable for technical and non-technical collaborators.
Opera experience
Professional experience at Opera Software.
Product Developer · Opera Software
Working on internal, non-public tooling with an AI and agentic development focus. Product details remain confidential.
Software Engineer · Opera Software
Developed browser extensions in the crypto wallet team and was responsible for automation, scripting, CI/CD and DevOps work supporting development and releases.
QA Automation Engineer · Opera Software
Built and maintained browser test automation with Selenium, Python and pytest, supporting test planning and release quality.
Education
Formal engineering education.
Bachelor of Engineering (Inż.), Computer Science · Uniwersytet WSB Merito Wrocław
Studies in Automation and Robotics · Politechnika Wrocławska
Founder projects
Independent products and client work in motion.
GKD Agency
An independent studio delivering its first client work. The linked portfolio is the current source for projects as they evolve.
Open GKDSkrzynka Spółdzielni
A housing-cooperative operations product in active MVP development, alongside work on its go-to-market strategy. The product site tracks the current direction.
Open Skrzynka SpółdzielniTechnology areas
Selected areas of work.
- Product development
- Frontend architecture
- JavaScript and TypeScript
- Full-stack delivery
- Automation and testing
- AI-assisted workflows
- Developer experience
- Operational web products
Languages
I speak
Polish
Native language.
English (US)
Professional working language and the canonical publication language for this site.
German
B2 intermediate proficiency.
Italian
Currently learning.
Writing
Notes from product and engineering work.
Design systems with AI
A practical note on using Claude Design, Canva, ChatGPT and Figma Make for brand identity, reusable components and production-ready product design workflows.
Contact
You want to talk about product, engineering or founder work?
You'll find me on either of those.