Senior AI Engineer — LLMs, RAG & AI Agents (Remote/Hybrid)

Affinity; Lisboa; Hybrid; EUR 45,000 - 75,000; Full time

Benefits offered by this job

Benefits & partnerships

Social activities & communities

Training & career development plan

Job summary

Affinity is a Portuguese technology consultancy with offices in Lisbon, Porto and Obidos, plus international projects. We seek an AI/ML Engineer to design and implement AI agents, generative AI solutions, and RAG architectures across cloud environments.

You will work with LangChain, LangGraph, and Semantic Kernel, integrating tools with enterprise systems. The role emphasizes real-use cases, collaboration, and continuous learning.

Qualifications

• Degree in relevant field such as Computer Engineering, Applied Math or Informatics.
• Minimum 3 years in AI/ML/AI Engineer roles.
• Strong Python development experience.
• Hands-on with LLMs (GPT/Claude/Gemini).
• Experience with RAG architectures and tool-calling mechanisms.
• Experience integrating AI with APIs and enterprise systems.

Responsibilities

• Design and develop AI agents and solutions based on LLMs.
• Develop Generative AI solutions including RAG-based architectures.
• Use LangChain, LangGraph, and Semantic Kernel for agent frameworks.
• Build tool-calling mechanisms and integrate agents with APIs/enterprise systems.
• Integrate AI solutions with enterprise applications, services and platforms.
• Develop process automation and workflows using intelligent agents.
• Work with AI models such as GPT, Claude and Gemini.
• Deploy AI solutions in Azure and/or AWS environments.
• Contribute to architecture evolution and best practices for AI/ML.

Skills

Python development

AI/ML engineering

LLMs

Analytical thinking

Teamwork

English (B2)

Education

Degree in Computer Engineering, Applied Mathematics, Management Informatics or similar

Tools

LangChain

LangGraph

Semantic Kernel

Azure

AWS

Job description

Affinity is a Portuguese technology consultancy with offices in Lisbon, Porto and Obidos, plus international projects. We seek an AI/ML Engineer to design and implement AI agents, generative AI solutions, and RAG architectures across cloud environments.

You will work with LangChain, LangGraph, and Semantic Kernel, integrating tools with enterprise systems. The role emphasizes real-use cases, collaboration, and continuous learning.