Case studies

MLJ Systems has worked with Tata Steel UK for years, building and supporting plant monitoring, utilisation and reliability systems that run every shift inside one of the UK's largest industrial sites.

We built the optimisation behind the charge balance model, using the Gurobi solver to optimise raw material charging across the operation. Formulating the plant's real constraints — materials, chemistry, availability — and solving them fast enough to be useful is exactly the kind of problem we like: one where a better answer is worth millions.

Our reliability work pays for itself too: one plant reliability project alone saves over £100,000 a year through failure reduction.

That track record led to the next chapter: we won the tender to modernise key plant systems for the Electric Arc Furnace transition at Port Talbot — one of the UK's most significant industrial decarbonisation projects — including the data and KPI foundations for the new furnace operation.

£3m a year saved through charge balance optimisation; £100k+ a year through failure reduction.

Protium is one of the UK's green hydrogen pioneers. Producing hydrogen at commercial scale needs operational software as dependable as the plant itself — and that software didn't exist off the shelf.

We built their hydrogen production management platform in Blazor on Azure: a modern cloud application that gives operations teams live visibility and control of production.

It's the same engineering standard we bring to steelmaking, applied to an emerging clean-energy industry — software people rely on to run physical operations, built to stay in production for years.

A modern cloud platform for an emerging clean-energy industry.

Some of the most important systems in industry were written decades ago, on platforms most of today's engineers have never seen. They keep running because they encode hard-won business logic — and because replacing them safely is genuinely difficult.

We migrated highly bespoke, decades-old OpenVMS systems onto a modern, supportable enterprise platform: preserving the behaviour the business depends on while unlocking modern tooling, security and integration.

Work like this is done incrementally and carefully — understanding the old system deeply before changing it, and proving each step against the behaviour of the original.

Critical systems moved without disrupting the operations that depend on them.