Senior Fullstack Engineer (Typescript) (Barcelona)

Required skills (Must-have)
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Python & Engineering Fundamental
sPython 3.12+, strong OOP, clean architecture
.CLI scripting and orchestration (argparse, bash)
.Package management, virtual environments, Docker
Backe
~ ndFastAPI (API design, service-oriented patterns
~).Asynchronous processing: Celery, messaging, event-driven design (RabbitMQ / Azure Service Bus
~).Relational DB experience, preferably PostgreSQ
L.
RAG / NLP /
LLMRAG architecture and implementation (chunking, embeddings, retrieval, generatio
n).Prompt engineering with versioning and iteration (multi-version prompt lifecycl
e).OpenAI API experience including structured output parsi
ng.Embeddings and retrieval tuning;
hybrid retrieval approach (vector + BM2
5).
Vector & Se
archQdrant (or Pinecone/Weaviate/...