Founded by Agata Ślęzak, created and developed by Stefan Pitek
Stefan Pitek - From 30 years across banking, hospitality, and business to software developer at 48
- Age: 48 years old
- Professional background: 12 years banking | 8 years hospitality | 8 years business operations | 2 years as chef
- First line of code: May 2025
- 8 months later: 3 production SaaS apps + this open-source tool
- Built with AI assistance: Claude, ChatGPT, GitHub Copilot
Agata Ślęzak - Business founder, sponsor, and strategic partner
- Former co-owner of restaurant with Stefan
- Provides business direction, funding, and strategic oversight
- Handles legal, financial, and operational aspects
- Most importantly: Believed in Stefan's potential when he had zero coding experience
- Continues to support and guide the project through every milestone
"None of this would exist without Agata's vision and support. When I wrote my first
console.login May 2025, she saw a future developer. Eight months later, we're shipping production software." — Stefan
From restaurants to SaaS - bringing the same discipline, attention to detail, and customer focus that defined our hospitality work.
Cerber Core was born from real pain points encountered while building SaaS applications with AI assistance:
- Problem: AI tools don't understand project boundaries
- Result: Schema drift, architecture violations, CI fail loops, production incidents
- Solution: Enforce a human-written contract (CERBER.md) as single source of truth
The tool is tested in production at Eliksir SaaS and has saved countless hours of debugging and prevented multiple production incidents.
Cerber Core protects real production applications. See it in action:
Eliksir SaaS Platform:
- Frontend CI Pipeline: Guardian Schema Check + lint + tests
- Backend CI Pipeline: Quality Gate + deploy checks
These aren't demo projects - they're live production systems serving real users, protected by Cerber contracts since day one.
📖 Read the full case study: Eliksir: How Cerber prevented 47 production bugs
- Email: st.pitek@gmail.com
- GitHub: Agaslez/cerber-core