Selected projects.

Challenge

Create, schedule, and play content centrally across many distributed screens. Across web, Android, iOS, and Windows, tenant-separated and in unattended continuous operation on cheap hardware, often without a stable connection.

Approach

A multi-tenant cloud platform with its own layout and schedule editor, media library, and super-admin area. Plus the devices: a custom kiosk launcher takes over an Android device's home screen, starts and supervises the player, controls rotation, and provisions new devices itself. The player is built cross-platform (Kotlin Multiplatform), with all playback and scheduling logic in a shared core with a state machine, so it keeps running without a network and without supervision. Content and commands arrive in real time from the cloud. A custom engine scales a template, built once, without loss from Full HD to 4K, including unusual zone formats.

Outcome

A platform instead of one-off installations. New devices come online through provisioning without manual work, content reaches the screen in seconds, and the state of every player is visible remotely. Several tenants share the same system without getting in each other's way.

Challenge

Deliver live odds reliably across many displays in hundreds of betting shops, each with its own vendor branding and low latency. Over the years the requirement grew from a pure display into a whole device fleet that has to be managed centrally and kept up to date unattended.

Approach

I have worked on this odds display for around ten years, throughout as lead in the team. Across several generations it evolved from the native desktop client to the web; the move to the web renderer I carried out on my own. Today every display is driven by a single URL. For the latest version I added a complete, multi-tenant management system that controls over 250 installations centrally, up to eight monitors per location. Configuration, themes, translations, and software updates run through a custom API; device status, commands, and logs come back in real time. Where native clients are needed, a Windows kiosk runs with forced fullscreen and channel-based updates that complete without on-site work.

Outcome

A desktop display has become a centrally managed platform. Over 250 locations run under one management, new ones come on board without on-site work, updates roll out unattended, and faults are visible and controllable remotely.

Challenge

Operators in a heavily regulated gambling market must be able to prove at any time that they meet requirements: audit checklists, shift planning, working hours, and responsible-gaming monitoring. All tenant-separated, data-protection compliant, and audit-durable.

Approach

A multi-tenant platform with a Python/FastAPI backend and a React interface. Data protection (GDPR) and working-time rules are anchored in the data model and workflows, not bolted on afterwards. Modules for checklists, shift planning, time tracking, and responsible-gaming monitoring interlock. Built four-eyes, with shared architecture ownership in the team.

Outcome

A system that reflects day-to-day compliance instead of managing it in spreadsheets. Evidence is produced during operation and holds up under audit.

Challenge

A marketplace where sellers and buyers meet: listings, accounts, payment, multilingual. From the first draft to a working checkout, alone.

Approach

Built full-stack alone: interface, a data model with row-level access rules, sign-in, file storage, and payment via an established provider. Designed trilingual. Particular care for the tricky spots like sign-in, where timing bugs quickly turn into problems, and for a clean checkout.

Outcome

A working marketplace with real payments, delivered in a manageable time by a single person. Proof that I take a product from idea to checkout on my own.