I’m a self-employed software engineer from Switzerland 🇨🇭, running
👉 zwei und eins gmbh — where I help companies and IT teams build and simplify web applications.

My current focus:

• Reducing complexity in existing web applications
• Backend & application architecture
• Identifying and removing unnecessary SPA / API layers
• Server-driven, hypermedia-based systems (Datastar, SSE streaming, events, HTML APIs)

If your web application is costly to maintain and increasingly complex, I help remove unnecessary complexity — so it becomes stable, understandable, and cheaper to evolve.

Most of my work is private client work — this profile shows selected open-source projects and experiments.

The tools obviously matter less than the outcome — clarity, simplicity and long-term maintainability.

• PHP (async w/ Swoole, Mezzio, Slim, Twig, DI, JWT, strictly typed), occasionally Go and Python
• Databases: MySQL/MariaDB, SQLite
• Frontend: ES6 / TypeScript, HTML, CSS/Sass (Bulma, Open Props)
• Build & tooling: ESBuild, phpstan, php-cs-fixer
• Approach: server-centric, streaming, minimal client state (Datastar, SSE)

I occasionally touch React or Vue or other SPAs — but usually when migrating away from them 😉.

• BSc in Computer Science (IT Security major)
• Recently back from a 16 month roadtrip through Scandinavia, Baltic, Balkan, around the Black Sea and Caucasus in a ’92 Mercedes T1 310 4x4 🚒
• Married, father of two
• Outside of code: cycling 🚴, running 🏃, photography 📷, cars 🚗, music 🎶

PGP key: keybase.io/mbolli

• mbolli/claude-code-dev-container — Self-hosted dev container running Claude Code over SSH, reachable from VS Code Remote-SSH and the Claude mobile app (2 days ago)
• mbolli/nfsen-ng — Responsive NetFlow visualizer built on top of nfdump tools. (3 days ago)
• zweiundeins/payrexx-go-sdk — Go SDK for the Payrexx (payrexx.com) payment API: generated from an OpenAPI spec assembled from Payrexx's own docs, plus hand-written auth and webhook verification. (2 weeks ago)
• mbolli/cometail — Tailscale applet for the COSMIC desktop (3 weeks ago)
• zweiundeins/cashctrl-ts-sdk — Typed TypeScript client for the CashCtrl accounting API, covering all 376 endpoints. Includes a generated OpenAPI 3.1 spec. Runs on Deno, Node and Bun. (1 month ago)

• mbolli/claude-code-dev-container — Self-hosted dev container running Claude Code over SSH, reachable from VS Code Remote-SSH and the Claude mobile app
• mbolli/cometail — Tailscale applet for the COSMIC desktop
• mbolli/dock-vscode-projects — Open and favourite VS Code projects as a live strip in the PowerToys Command Palette Dock. Local and WSL.
• mbolli/php-ron-playground —
• mbolli/tempest-highlight-ron — RON (Readable Object Notation) syntax highlighting for tempest/highlight — parser-backed, role-aware highlighting of keys, values, numbers, literals & structure via the real RON parser (mbolli/php-ron).

• PHP-CS-Fixer/PHP-CS-Fixer (v3.95.23, 2 days ago) - A tool to automatically fix PHP Coding Standards issues
• mbolli/nfsen-ng (v1.0.0-beta.4, 2 weeks ago) - Responsive NetFlow visualizer built on top of nfdump tools.
• zweiundeins/payrexx-go-sdk (v0.2.0, 2 weeks ago) - Go SDK for the Payrexx (payrexx.com) payment API: generated from an OpenAPI spec assembled from Payrexx's own docs, plus hand-written auth and webhook verification.
• mbolli/cometail (v0.1.0, 3 weeks ago) - Tailscale applet for the COSMIC desktop
• zweiundeins/wallee-go-sdk (v0.1.1, 1 month ago) - Go SDK for the Wallee (wallee.com) payment API — generated from Wallee's OpenAPI spec, with JWT/MAC auth.

• feat: make the geolocation endpoint configurable via NFSEN_IPINFO_URL (#163) on mbolli/nfsen-ng (3 days ago)
• Track Payrexx's August 2026 ECR rewrite on zweiundeins/payrexx-go-sdk (2 weeks ago)
• docs: add mbolli/php-ron to implementations list on starfederation/ron (2 months ago)
• Configurable adapter factory on mbolli/phoenix (6 months ago)
• Configurable adapter factory on lulco/phoenix (7 months ago)

• Get autoscout24.ch favourites as csv (3 years ago)
• GPS/NMEA collector setup (gpsd/prometheus/grafana) (4 years ago)
• Gets the size of the current folder's contents, as long as they're older than the year specified. Useful for scanning through a big directory, if you want to archive stuff older than x years. Ignores Thumbs.db and .DS_Store files. (8 years ago)
• (9 years ago)

• Bobowski/stario - Bringing back joy of building web applications. (1 month ago)
• starfederation/ron - Readable Object Notation (2 months ago)
• pmbanugo/tina - A shared-nothing, thread-per-core concurrency framework. Designed for massive concurrency because There Is No Alternative (TINA) (3 months ago)
• psviderski/uncloud - A lightweight tool for deploying and managing containerised applications across a network of Docker hosts. Bridging the gap between Docker and Kubernetes ✨ (4 months ago)
• tconbeer/harlequin - The SQL IDE for Your Terminal. (5 months ago)