ML & AI Developer

Requisitos

Português nativo

Inglês fluente (oral e escrito)

Residência Lisboa ou Porto

Experiência profissional mínima de 2 anos

O que vais encontrar

Aplicação de AI a operações reais

Produto próprio (KYO) com evolução contínua

Problemas complexos e relevantes

Equipa exigente e orientada a qualidade

Espaço para construir, testar e melhorar

Candidatura

careers@aristea.io

ML & AI Developer

Lisbon or Porto

Applying artificial intelligence to real operations

At ARISTEA, artificial intelligence is applied to demanding operational environments.

KYO is our digital platform, designed to structure, monitor and continuously improve complex service operations.

We are looking for an ML & AI Developer with hands-on experience in language models and data systems, capable of transforming data and models into practical solutions with real-world impact.

Here, artificial intelligence supports execution.

What You Will Do

Work closely with operational teams to translate real needs into machine learning solutions

Develop and evolve AI components integrated into the KYO platform

Build and optimise models based on LLMs (RAG, fine-tuning, embeddings)

Integrate models into web applications and scalable platforms

Monitor, test and continuously improve model performance

Contribute to data architecture and processing pipelines

Integrate APIs and external services

Collaborate with cross-functional teams (product, technology and operations)

Ensure quality, robustness and maintainability of solutions

Technology stack

Python and SQL

OpenAI API, LangChain and the LLM ecosystem

RAG, embeddings, vector databases

Open-source models and deployment on Azure

Azure DevOps

Data modelling and architecture

Data visualisation tools (Power BI, Python, R or similar)

Profile

Experience applying Machine Learning to real-world problems

Practical knowledge of LLMs and their architectures

Strong analytical skills and structured thinking

Interest in systems with operational impact

Ability to work with autonomy and ownership

Strong communication skills across technical and business teams

Requirements

Native Portuguese speaker

Fluent in English (spoken and written)

Based in Lisbon or Porto

Minimum of 2 years of professional experience

What you will find

Application of AI in real operational environments

A proprietary product (KYO) with continuous evolution

Complex and meaningful challenges

A demanding, quality-driven team

Space to build, test and improve

Application

careers@aristea.io