We build software meant to last decades.
Interware is a founder-led engineering studio on the Microsoft stack. For more than 25 years we've designed, shipped and maintained mission-critical line-of-business systems — including one we built and evolved for 22 years straight. Most of our work is done under contract, embedded in our clients' teams — and lately some of that craft has also gone into products of our own.
Engineering you don't have to babysit.
Contract engineering
Senior, founder-led development of line-of-business applications across desktop, web and mobile — specified, built and delivered without a layer of account managers in between.
Long-term maintenance
We don't vanish after v1. Systems get evolved for as long as the business needs them — through regulation changes, platform shifts and a generation of Windows. We measure relationships in decades.
Product development
Turning deep domain knowledge into products with their own legs. enaro and drive-evos are the first two coming out of the studio — built on the same engineering discipline as our client work.
Architecture & consulting
Platform choices, modernization paths and the hard calls — from someone who has lived with the consequences of those decisions for twenty years, not twenty months.
The proof is in the longevity.
Four engagements that mattered — and one that lasted twenty-two years.
Interware has never chased logos. The track record is a short list of deep, long engagements — the kind where you live with your decisions long enough to learn what “maintainable” really means. Software like that usually costs more to build and less to own: fewer rewrites, fewer surprises, a lower total cost over the years it stays in service.
Interware founded
Set up as a senior engineering practice — built to take on long, serious work without the overhead of an agency.
Traffic-control systems
Communication software for signalling devices and their interoperability, for a global industrial group's traffic-control division — early, unforgiving real-world systems.
First .NET application
An RMA platform for a computer- and parts wholesaler — one of our first production systems on .NET, and the start of a stack we’d back for the next two decades.
Share-register platform
Flagship · 22 yearsTwenty-two years on one platform at the edge of the stock-exchange industry, used every day by the client’s own staff and run entirely on their own infrastructure — no cloud, no outside dependency. We designed it, built it and evolved it the whole way; from 2010 I held the role of acting CTO, as an external. Through changing regulation, shifting platforms and a generation of the Microsoft stack, it never became the system nobody dared to touch. Retired cleanly at the end of 2024.
Swiss energy · Trading onboarding
For one of Switzerland’s largest energy companies: an internal platform for managing client contracts and onboarding them into the trading system. Modern Blazor and C#, for a business where reliability isn’t negotiable.
Run it where you can actually keep it.
This isn't a reaction to the headlines. For two decades we built systems that simply ran — on our clients' own infrastructure, in a world where the cloud was never even an option. Lately we've seen the other side up close: a modern, cloud-dependent operation brought to a standstill because a service an ocean away couldn't be reached. The newest risk to critical software isn't technical — it's who holds the keys.
We help clients get out from under the American cloud giants — building on Linux, Docker and Kubernetes, on infrastructure you control: your own hardware, a Swiss or European host, or a private cloud. Built to move, so no single vendor — or government — ever holds your business hostage.
Run anywhere
Containers and Kubernetes from the first commit. The same system runs on your servers, a Swiss data centre or a private cloud — your call, reversible at any time.
European by choice
Keep data and workloads on this side of the Atlantic, under Swiss and EU jurisdiction, whenever that's what your business — or your regulator — requires.
Portable by default
No proprietary lock-in baked into the foundation. A change in a provider's terms becomes an inconvenience, not an existential risk.
A few things that are also ours.
enaro · enaro.energy
An operating system for local energy. Measuring, distributing and settling locally produced power for energy communities — telemetry, routing and billing on the installation itself.
Visit enaro.energy → Active developmentevOS · drive-evos.com
EV-native navigation and vehicle intelligence for electric cars whose factory software never kept up. Range-aware routing, live telemetry and offline maps — running on hardware in the car, with no cloud dependency. A Rust core, native on Linux and Android.
Visit drive-evos.com →How we work.
Senior by default
You talk to the people who write the code. No account layer, no hand-off to juniors once the contract is signed.
Optimized for the decade
We make choices that still look right in ten years — not the ones that demo best this quarter. Boring where boring wins.
Sustainable solutions
Maintainable, documented and built to be handed over. Software that a future team — ours or yours — can actually live with.
Windows, period — and beyond
Deep on the Microsoft stack since 1998 — and fluent in where it's going: Blazor on the web, Avalonia and MAUI cross-platform, Linux and Kubernetes in production. And it reaches all the way down to the metal: bare-metal Rust on an ESP32 — our own SignalR, rebuilt in Rust, running on the chip itself — driving real-world devices over RS-485. The newer work — AI-agent infrastructure (MCP servers, semantic memory) and shared-memory gRPC — gets the same long-view discipline.
We join your team.
At home with XP practices — pair programming, review, working in the open. Over the 22-year engagement we brought two junior developers up to senior level through pairing, until they left for adventures of their own.
We hold a Professional Scrum Developer (PSD I) certificate and slot into a Scrum team without fuss. The conviction underneath is agile with a small a: working software and honest adaptation over ceremony.
Lead a build, or work as a senior pair of hands inside an existing team. Remote across the DACH region or on-site in Switzerland. Contract terms, no agency in between.
Founded in 1998 and still founder-led. Interware is deliberately small — a senior engineering practice, not an agency — working with clients who need software that outlives its roadmap.
Have a system that needs to outlast its roadmap?
A few lines is plenty to start — what you're building, the rough scope and timeline, whether it's on-prem or cloud, and how best to reach you.