ZTABS is a remote-first RAG & knowledge systems agency serving Barcelona businesses — including custom rag pipelines, enterprise knowledge bases, customer-facing ai search. We work with Mobile & Telecom, Travel Tech, HealthTech companies in Barcelona, Spain via timezone-aligned engineers and async workflows; we do not have a local office, and we are explicit about that with every client.
ZTABS provides RAG & knowledge systems services in Barcelona, Spain — including custom RAG pipelines, enterprise knowledge bases, customer-facing AI search, and more. We work with Barcelona businesses across Mobile & Telecom, Travel Tech, HealthTech using technologies like Python, OpenAI, LangChain.Get a free consultation →
Senior RAG & knowledge systems engineers in Barcelona run roughly $83–$118/hr. 1.5K–4K senior AI engineers; majority in applied ML, fewer research-grade hires. 4–6 week senior hiring loop. Operating timezone: CET/CEST (UTC+1/+2).
2026 RAG: pgvector + Postgres for sub-10M docs, Pinecone or Weaviate for >10M, Cohere/Voyage AI/OpenAI for embeddings, Cohere Rerank or BGE for re-ranking, LlamaIndex or LangChain for orchestration, RAGAS or TruLens for evals. Self-hosted: vLLM + LiteLLM proxy. A real RAG engineer can debug a "the model said X" failure to a chunk-retrieval miss vs an embedding-similarity error vs a prompt-template bug. They run evals before every change. RAG without evals is hope-driven engineering — and hope doesn't scale past beta users.
Where Barcelona senior RAG & knowledge systems talent comes from: Barcelona senior talent flows from Glovo HQ, Wallapop, eDreams ODIGEO, Telefónica Barcelona, plus UPC + UPF + UB CS programs. Mobile + travel-tech + e-commerce depth. MWC (Mobile World Congress) annual hosting effect. For RAG & knowledge systems specifically, this means buyers can typically tap engineers who have shipped at one of these orgs before — relevant operational depth, not bootcamp graduates.
Our RAG & knowledge systems team delivers a full range of capabilities tailored to Barcelona's Mobile & Telecom and Travel Tech sectors:
Ingest, chunk, embed, and index your documents for fast, accurate retrieval with any LLM.
Internal knowledge systems that let employees search across wikis, SOPs, contracts, and Slack history.
Give your customers an AI assistant that answers product questions using your documentation and help center.
Pull data from PDFs, web pages, databases, APIs, Google Drive, Notion, Confluence, and more.
Every answer includes source citations so users can verify and trust the information.
Continuously improve retrieval quality with evaluation frameworks, feedback loops, and reranking.
Each phase ships with written progress notes plus a weekly review call scheduled in your business hours. See our full process →
When choosing a RAG & knowledge systems partner in Barcelona, look for a team with production experience in your specific industry. Generic developers miss critical domain nuances that cost you time and money in rework.
Source: ZTABS Client Data 2024-2026
Barcelona (a leading European startup city and Mobile World Congress host, population 1.6 million) is home to thriving Mobile & Telecom, Travel Tech, HealthTech sectors — each with distinct RAG & knowledge systems needs. Read our full Barcelona market overview →
Each of Barcelona's core sectors has specific RAG & knowledge systems requirements. We build solutions tailored to these industry needs:
Mobile & Telecom RAG & knowledge systems engagements involve sector-specific compliance, integrations, and workflows. See the mobile & telecom industry page for scope, pricing, and shipped examples.
Travel Tech RAG & knowledge systems engagements involve sector-specific compliance, integrations, and workflows. See the travel tech industry page for scope, pricing, and shipped examples.
RAG & Knowledge Systems for Travel →HealthTech RAG & knowledge systems engagements involve sector-specific compliance, integrations, and workflows. See the HealthTech industry page for scope, pricing, and shipped examples.
Marketplace Platforms RAG & knowledge systems engagements involve sector-specific compliance, integrations, and workflows. See the marketplace platforms industry page for scope, pricing, and shipped examples.
Our distributed engineering team delivers the same quality and responsiveness as a local partner — tuned to Barcelona's Mobile & Telecom sector and Central European Time (CET) business hours.
Our RAG & knowledge systems team aligns sprints, standups, and code reviews to Barcelona's Central European Time (CET) business hours. We schedule overlap windows so your team gets same-day responses and real-time collaboration across time zones.
A senior RAG & knowledge systems project lead manages your engagement end-to-end. They understand Barcelona's business landscape and Mobile & Telecom sector requirements, own your backlog, and ensure every two-week sprint delivers working features against your commercial goals.
Every Barcelona client gets daily async updates on RAG & knowledge systems milestones, weekly demos of working features, and shared project boards. We prioritize overcommunication so your team always knows the status, blockers, and what ships next.
We have delivered RAG & knowledge systems for Barcelona's core industries — Mobile & Telecom, Travel Tech, HealthTech — and understand the compliance, integration, and performance requirements each sector demands. HIPAA-compliant architecture is standard for our healthcare clients.
Verified reviews from real client engagements — sourced from our public testimonial archive and Clutch profile.
My experience is throughout positive. Communication, service, the short response times and the flawless execution of a challenging topic was absolutely great. ZTABS is definitely my first choice again.
Christian Neff
Bank Software Advisory · Bank Software Advisory
Fintech
Fantastic Agency! I couldn't fault them even if I tried. They always go above and beyond to meet your expectations and always produces quality work. Thank you ZTABS.
Stephanie Kal
CEO · Beauty Finder Australia
Marketplace
It has been great working with ZTABS. They bounce off the ideas along the way. Amazing Experience.
Joel Rowe
CEO · Drill Quoter
Marketplace
We don't just contract — we ship and operate our own software. 17 products in production.
Common questions about RAG & knowledge systems for Barcelona businesses
We offer end-to-end RAG & knowledge systems for Barcelona businesses: custom RAG pipelines, enterprise knowledge bases, customer-facing AI search, multi-source ingestion. We use technologies like Python, OpenAI, LangChain to build solutions tailored to Barcelona's key industries — Mobile & Telecom, Travel Tech, HealthTech.
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