The team behind Harold

TVL Tech

A senior, international engineering team building software across artificial intelligence, blockchain and custom web development. We build Harold, and we build for organisations that need production systems, not demos.

Track record

A decade of shipping, condensed into one team

100+
Projects delivered
6
Industries served
3
Countries · LU, RO, US
30
Person team across AI, blockchain and data
What we build

Where AI meets your needs

Four practices, one delivery team. Most engagements combine them, because production systems rarely respect a single category.

Applied AI

Large language models in production: agentic workflows, retrieval, evaluation and the regression discipline that keeps them honest once real traffic arrives.

Blockchain infrastructure

Smart-contract design and audit, including work on the European Commission's own blockchain services infrastructure. Systems that hold value have to be right the first time.

Custom web development

Web platforms and interfaces built for real workloads: fast, accessible and maintained. The same craft that ships Harold's dashboard ships client products.

Harold

Our own product: a self-hosted log intelligence platform that reads every log line, reaches for the model last, and hands engineers the few items that matter. See how it works →

Trusted with hard problems

Institutions call us when the stakes are real

European Commission

Our team designed and audited smart contracts behind EBSI, the EU's European Blockchain Services Infrastructure, and our CEO sits in the Commission's AI circles.

NATO DIANA

Mentor and judge for NATO's Defence Innovation Accelerator for the North Atlantic, working with deep-tech founders on dual-use technology.

Enterprise scale

Leadership that coordinated 120 developers at eMAG and steered product through a growth run from single-digit millions to a billion. Trusted by DataDiggers.

Applied AI LLMs in production Smart-contract audit AI governance EU AI Act readiness Data sovereignty Custom web On-premise delivery
Where we are

Luxembourg, Romania, United States

One team across three countries and two continents, close enough to European institutions to work with them and spread enough to follow the sun.

Founded in 2019, TVL Tech grew out of enterprise and public-sector delivery rather than a lab. That is why our work tends to reach production and stay there. We keep the team senior and international on purpose: the problems worth taking on do not respect borders, and neither should the people solving them.

Have a system that has to work?

Whether it is log intelligence with Harold or a build of your own, start with a conversation. Tell us the problem and we will tell you honestly whether we are the right team for it.