AI Engineer

AI Engineer

YLD.com

Lisbon, Portugal

Full-time, Engineering Department

About YLD

YLD is a software engineering and design consultancy with offices in London, Lisbon, and Porto. The firm helps clients develop competitive capabilities and fosters a progressive culture of learning.

The Role

Building new AI-powered features and improving client Digital Platforms with intelligent capabilities. Day-to-day involves continuous product delivery with AI model integrations, team collaboration on engineering and AI initiatives, and participating in internal showcase events.

Required Skills & Experience

Core Programming & AI

• JavaScript, TypeScript, and Python proficiency
• Advanced expertise in RAG, embeddings, vector search, and prompt engineering
• Evals, guardrails, caching, chaining, and function calling
• Agentic architecture design: multi-agent systems, tool orchestration, planning/reasoning frameworks, memory systems, and agent coordination patterns
• LLM frameworks (LangChain, LlamaIndex, LiteLLM, CrewAI, Mastra)
• API integrations (OpenAI, Anthropic)
• Fine-tuning knowledge (LoRA/QLoRA, instruction tuning, RLHF)

Data & Databases

• Vector databases (Pinecone, Weaviate, Chroma, Qdrant)
• PostgreSQL, Neo4j experience
• RAG data pipeline design

Infrastructure & DevOps

• CI/CD pipelines, Terraform, CloudFormation, CDK
• AWS, Azure, GCP cloud platforms
• Docker, Kubernetes containerization
• LLM inference optimization (vLLM, TGI)

Frontend & APIs

• React or modern UI frameworks
• GraphQL, gRPC, WebSockets, MCP
• API design for LLM services
• Real-time chat handling

Benefits

• Private health care
• 25 days annual holiday
• 2,000 EUR training/conference allowance
• 300 EUR hardware allowance
• Enhanced parental leave (6 months paid)
• Wellness support via Oli
• Discretionary bonus
• Company laptop
• Referral schemes

Recruitment Process

Two-stage process: initial talent team interview (30-45 minutes) followed by technical interview with senior developers (1.5 hours).