About

Founder-led, Singapore-registered, deliberately small.

OUI Services Pte. Ltd. is a Singapore software company building bespoke systems, products and platforms for smaller businesses. One person scopes it, builds it and answers for it.

The founder

Thomas Tarpin-Lyonnet

Founder & Director

Twenty-five years building software — payment platforms, merchant systems, loyalty programmes — mostly in the one field where a rounding error is somebody's money. I have run engineering teams in start-ups, in SMEs and in multinationals, which is a useful spectrum: it is how you learn which problems belong to which size of company, and how differently each can afford to solve them.

Singapore has been home since 2003. I work with smaller businesses because their problems are the ones I find recognisable and worth solving — rarely the problems a software vendor's brochure is written about.

I work in English and French, and adapt the register to whoever is in the room — the documentation can be precise without the training session being incomprehensible.

Why the company exists

Good software is not the privilege of large companies.

Most SMEs run on tools built for somebody else's process, plus a layer of spreadsheets and goodwill holding the gaps together. It works, until it quietly stops working: the errors creep up, the month-end gets longer, and the business depends on whoever remembers how the file is structured.

Enterprise software vendors do not solve this — their products assume a scale and a budget that is not yours. Large consultancies do not either, for the same reason. What is left is a gap that suits exactly the kind of firm we set out to be: close enough to see how you actually work, small enough that it is worth doing properly.

How we behave

Four commitments, and you can hold us to them.

You own everything at the end

Source code, documentation, credentials and data. Intellectual property transfers to you on final payment. Lock-in is a business model we have chosen not to have.

No commission, from anyone

We take nothing from software vendors, hosting providers or anybody else we might recommend. When we say a product suits you, that is the whole reason.

We tell you when not to build

A conversation that ends in “you don’t need this” is a good outcome. It happens, and it costs you nothing.

We stay inside our competence

Regulatory, legal, tax and clinical questions go to your advisers. We will frame them precisely so the answer is useful, then get out of the way.

Contact

Start with a conversation.

Email is the quickest way to reach us. If you would rather meet, we come to you; there is more to learn in twenty minutes at your premises than in an hour of video calls.

Registered office
22 Sin Ming Lane #06-76
Midview City
Singapore 573969