proSapient is looking for an AI/ML Engineer (Python) to contribute to initiatives that blend AI research with robust software engineering. You will take a hands-on role, working across the full stack—from exploring business problems to building and deploying production-grade systems—with a focus on LLM-based data extraction, advanced recommendation engines, and backend development.

What You'll Do

Translate business problems into structured data science solutions with measurable outcomes.
Design and build production-grade solutions using LLM providers, Python, and databases.
Conduct and analyze experiments to evaluate the quality of data processing pipelines.
Work with real-time data streams and search infrastructure using tools like Kafka and Elasticsearch.
Present findings and recommendations to both technical and non-technical stakeholders.

What We're Looking For

Strong Python programming skills, with practical experience writing clean, production-ready code.
Solid foundation with LLMs, including prompt engineering, fine-tuning, or retrieval-augmented generation (RAG).
Familiarity with data science libraries and pipelines (e.g., pandas, spaCy).
Experience with Python web frameworks (e.g., FastAPI, Django) and RESTful APIs.
Proficiency in working with PostgreSQL or other relational databases.
Strong hands-on experience with Elasticsearch, including performance optimizations and query tuning.

Technical Stack

Python, LLM providers, pandas, spaCy
FastAPI, Django
PostgreSQL, Elasticsearch, Kafka

Team & Environment

You'll join a cross-functional, fast-moving team of engineers, data scientists, and product managers in a collaborative and supportive environment.

Benefits & Compensation

Tenure gifts.
Full health insurance through AdvanceCare (after probation).
Enhanced Maternity & Paternity package.
22 days annual leave + public holidays, including Christmas closure.
Paid sick leave (up to 10 days per year).
Hybrid working model (3 days per week in Lisbon office, 2 from home).
Meal allowance of 9.6€ per working day.
Team socials.
Opportunity to participate in ERG groups.
Corporate events like Christmas & Summer parties.

Work Mode

This role follows a hybrid model, requiring 3 days per week in our Lisbon office.

We are committed to building an inclusive workplace – did you know that marginalized groups are less likely to apply to jobs unless they meet every requirement listed? If you are interested in the above role, but don’t necessarily tick every box, we encourage you to apply anyway – this role could still be a great match!