Senior Software AI Engineer - AI Systems

At We are META (Permanent / Contractor), in Portugal

Expires at: 2027-10-15

Remote policy: Full remote

Role description and responsibilities

As a Senior AI Engineer at WE ARE META, you will be matched with clients across diverse sectors of the tech industry. You will work in a fully remote model, building and maintaining advanced AI systems in production environments. The role involves designing and engineering LLM-based applications, building agentic systems end-to-end — systems that plan, write code, validate their own output, and improve over time — and working with modern orchestration frameworks and cloud data platforms.

Requirements

6+ years of professional experience as an AI Engineer or in a similar role

Strong production software engineering skills: Python, testing, packaging, CI/CD, async, REST, and Docker

AI SDLC experience in production environments

Real depth in LLM application engineering: prompt design, function calling, structured outputs, RAG, vector stores, and experience with the Anthropic and OpenAI APIs

Experience building agentic systems end-to-end: systems that plan, write code, validate their own output, and improve over time

Familiarity with the orchestration landscape (LangGraph, LlamaIndex, AutoGen, CrewAI) and opinionated about when a thin custom harness beats a framework

Working fluency with at least one cloud data platform and SQL

Fluency in English (at least a B2 level)

Must be based in Portugal with Portuguese or EU citizenship, or a valid work permit

Benefits & perks

Welcome kit upon joining

Opportunities for career progression

Health insurance coverage

Coverflex meal card

Other protocols and special discounts

Access to a network of national and international partners across diverse tech sectors

Personalized support from a career coach

Flexible working policy matching (remote, hybrid, on-site) based on your preferences