Welcome to the zwei und eins GitHub organization — the home for open-source work and shared tooling from zwei und eins gmbh, a Swiss software consultancy and development studio.
We believe in pragmatic, maintainable, and performant software that solves real problems — without unnecessary abstraction or architectural overhead.
zwei und eins gmbh is led by Michael Bolli, a software engineer with long-term experience in building, stabilising, and evolving production systems.
We work with companies and internal IT teams that:
- operate business-critical software,
- struggle with growing architectural complexity,
- or want to move towards simpler, more robust system designs.
Our focus is not novelty for its own sake, but clarity, longevity, and measurable improvements.
- Website: https://zweiundeins.gmbh
- Email: info@zweiundeins.gmbh
- Founder: https://github.com/mbolli
- GitHub Organization: https://github.com/zweiundeins
If you value clarity over complexity, we will likely get along well.
- Architecture reviews of existing PHP applications
- Performance analysis and runtime profiling
- Refactoring legacy systems with minimal disruption
- Server-authoritative, HTML- and event-driven architectures
- Reduction of unnecessary API and SPA complexity
- Temporary reinforcement of engineering teams
- Architectural decision support
- Coaching on maintainability, performance, and system design
Not our focus
- Marketing-only websites
- Pure frontend projects without backend or architectural responsibility
Our technology choices follow the problem, but are guided by a clear set of principles:
Languages & Platforms
- PHP (primary)
- TypeScript
- Python
Persistence
- MySQL
- SQLite
Architectural Themes
- Server-centric systems
- Hypermedia-driven flows
- Server-Sent Events (SSE)
- Deterministic rendering
- Minimal client-side state
Core Values
- Fewer moving parts
- Predictable behaviour
- Long-term maintainability
- Performance that can be measured and explained
We publish selected internal tools, libraries, and experiments when they are:
- generally useful,
- well-understood in production,
- and aligned with our architectural values.
Open source is a means of knowledge sharing, not marketing.
