About us

Law and engineering, side by side.

IAJUS was not built by a technology team guessing how lawyers research, nor by lawyers ordering software. It grew from both at the same time, and that explains the choices behind the product.

The founding partners

Rafael Bittencourt

Founding partner who conceived IAJUS · brings computing and law together.

Degrees in Computer Science (UFBA) and in Law (UnB).
Specialist in Data Science and Analytics (USP/Esalq); postgraduate studies in Artificial Intelligence (UTFPR).
Federal auditor in Brazil, with more than ten years in data science and artificial intelligence.
Researched the limits of generative AI applied to law at the UnB Faculty of Law.

Lucas Arieh Medina

Founding partner · lawyer and criminal law researcher.

Lawyer in Brazil for seven years, in criminal, public, municipal and labour law.
Law degree from the Federal University of Rio Grande do Norte (UFRN).
Master's in Criminal Law and Criminology from the University of São Paulo (USP).
Driven by one question: how the law works in practice, as seen in court decisions.

Berto Igor Caballero

Founding partner · lawyer and professor.

Practising lawyer in Brazil since 2009.
Adjunct Professor at UFPI and IDP.
Law degree from UFPI, master's in Law from the University of Coimbra and doctorate in Law from IDP.
Researches regulation and technology, with a focus on artificial intelligence and data protection.

Eduardo Aurélio Resende Pereira

Founding partner · engineer and data scientist.

Federal auditor in Brazil since 2023.
Electrical engineer; postgraduate studies in Data Science and Analytics (USP/Esalq).
In the public sector since 2018, applying machine learning to complex problems.
Looks for the patterns in large volumes of data that traditional analysis does not reveal.

The mission: legal intelligence with the source at hand

We believe the future of law depends on an efficient and responsible use of generative AI. The answer is not a bigger model. It is giving the model access to curated, up-to-date legal information. The mission of IAJUS is to make every answer end with a verifiable link to its source, with the professional at the centre of the decision. A page is labelled an official source only after our server has verified it.

What we do not compromise on

The source in view. Answers come from real documents and point to their origin when a stable link exists, so anyone can check them.

No inflated promises. We say what is covered and what is not yet covered. We do not announce volumes to impress: the figures we publish are measured and dated, and never come with a promise of completeness. When the collection does not have something, the answer says so.

The professional at the centre. Artificial intelligence retrieves, organises and points to the source. The legal decision belongs to those who practise, judge, teach and research law.

Academic and technical rigour. IAJUS grew from research into the limits of generative AI in law. That honest reading of the limits guides every product choice.

The research behind IAJUS. Before it was a platform, IAJUS was an academic question: how far does generative AI really help in law, and where does it still fail? The monograph Aplicações e limitações da IA generativa no Direito (Applications and limitations of generative AI in law; Faculty of Law, University of Brasília, 2024) is available in the university repository: read the research (Portuguese) (opens in a new window).

Who provides the service. iajus.pt is operated by Celeris Juris Tecnologia e Inteligência Jurídica LTDA, a company incorporated under Brazilian law that owns the IAJUS trademark. The identity of the data controller and the contact for exercising your rights are set out in the Terms and Conditions and the Privacy Policy. The Portuguese versions of both documents prevail.

Get in touch

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Contact the team Request access (Portuguese)