About The Company

Prefer the flexibility of remote work?

You’re welcome to work remotely. Looking for some social energy?

Our hybrid setup gives you the option to connect and work alongside teammates at our hubs in Valencia, Barcelona, Madrid and Murcia. We also want the time we spend together in person to be worth it. Rather than inheriting a finished playbook, you’ll have a voice in creating it.
It's deep, hands‑on model work in Python and PyTorch, with a strong emphasis on evaluation and on getting models into reliable production use inside highly regulated environments — banks, insurers, and telecoms where getting it wrong isn't an option. This is an early‑stage company, and the AI team is growing quickly. You'll have real ownership over what we build and how we build it.
Train, fine‑tune, and post‑train Maisa's own small and large language models — from data preparation through to evaluation and release
Design and run rigorous model evaluation: benchmarks, regression sets, and quality criteria that reflect real client use cases rather than leaderboard scores
Build and improve training pipelines and infrastructure, including data curation, experiment tracking, and reproducibility
Apply and adapt modern training techniques — parameter‑efficient fine‑tuning,



post‑training and alignment methods — and evaluate their real impact
Monitor deployed models for quality degradation and drift, and drive the retraining or corrective work required
Genuine, current, hands‑on experience training and fine‑tuning models — this is a builder's role, not a supervisory one
Strong PyTorch depth: comfortable building and modifying model architectures directly, not only running existing pipelines
Solid software engineering fundamentals in Python
Experience with distributed or multi‑GPU training
Background in an early‑stage or scaling startup
Fully remote. You’ll be joining one of Europe’s most exciting early‑stage AI start‑ups, working on genuinely differentiated technology: building and training our own models rather than wrapping someone else’s, in a domain where reliability and auditability actually matter. Following our recent $25m Seed Round, backed by leading Venture Capital firms including Creandum, Forgepoint, NFX, and Village Integral, we’re scaling quickly and realising significant enterprise traction — working with clients including Santander. By submitting this application, I agree that my personal data will be collected, processed, and retained by the company solely for the purposes of managing and assessing my candidacy.
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📌 Software Developer Engineering · · Fully Remote (Madrid)
🏢 Maisa
📍 Madrid