Sharpsoft is Luc. I take software that has been running for decades and that nobody wants to touch, and rebuild it piece by piece — while it keeps running. Alongside that, new things get built: on the web, on Android, in the cluster.
From real migrations: the system that was running — and what runs in its place today.
The business ran on a Delphi application with a Sybase database — stock, prices, invoices. It was moved to Java first, then piece by piece to Go. Next to it there is now a webshop that makes the entire inventory publicly searchable, without ever touching that database directly.
A Java worker mirrors only what changed from Sybase into PostgreSQL and transcodes the images to WebP. A Go API serves PostgreSQL and nothing else. Orders run through Swiss QR-bill, TWINT and PayPal. The whole catalogue also goes to Google Merchant Center as a feed — every part as its own product.
The old system stays in production and becomes the source of truth. The new architecture grows next to it, takes over load and function, until what remains of the old system is only the part that genuinely earns its place. No cutover date, no downtime, no lost records.
Sybase, Oracle, DB2, PostgreSQL, Java, Go
Web applications, internal tools, interfaces, and the infrastructure underneath them. From the first sketch to running in a Kubernetes cluster — from one person who also understands the database.
Angular, Go, Rust, PostgreSQL, Kubernetes
Agents that work on real systems — the codebase, the ticket queue, the database — rather than on a demo. With harnesses that measure whether the result is actually better, and the honesty to say where the effort does not pay off.
Claude, Claude Code, MCP, agents, RAG, evaluation
SEO as an engineering problem: pages delivered as finished HTML instead of an empty JavaScript shell, structured data, clean sitemaps, fast loads. So that a catalogue of tens of thousands of items can actually be found.
Prerendering, JSON-LD, sitemaps, Google Merchant, Core Web Vitals
A learning platform for Swiss schools and adult learners. Five languages including Romansh, exercises as independent micro-frontends, multi-tenant.
Angular, Go, gRPC, Kubernetes
Remote desktop over a single port. No VPN, no port forwarding, no plugin — the machine dials out on its own, and the browser decodes the picture directly.
Rust, WebCodecs, Redis, Kubernetes
An Android player for music and audiobooks on your own server. Every book keeps its own position; playback on Sonos and in the car.
Android, Kotlin, Subsonic, DLNA
Device management for families on hardware they own. Rules for apps and screen time, without the data leaving the house.
Android Device Owner, Go, PostgreSQL
Tools that came out of real projects and stayed public.
A contest platform for chess-playing agents. FIDE-compliant rule enforcement, clocks, Elo ratings and a dashboard that follows games as they happen — built for programs rather than people, so the interface comes first.
Go, gRPC, gRPC-Web, Angular, MIT
A Maven plugin that turns .proto files into Java records running on the JDK alone: no protobuf library, no Netty, no protoc in the build. The bytes stay compatible with protoc, checked by a differential suite.
Java 17, Maven Central, MIT
gRPC over a single WebSocket connection, straight between Angular and Go. No Envoy proxy in between, many calls multiplexed on the same connection.
TypeScript, Go, WebSocket, MIT
A breeding planner for Palworld. The save file is read in the browser itself, and the tool works out the shortest path from the pals you already own to the one you want. Nothing is uploaded; there is no server.
TypeScript, GitHub Pages, MIT
An old system that needs replacing, or something new that needs building? Send me a message.