AI Engineer at YLD

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).