Seqera is on a mission to empower scientists and organizations to solve humanity's biggest challenges through data-driven science. As the company behind Nextflow and the Seqera Platform, we enable global enterprises, biotech innovators, academic institutions, and public sector organizations to scale complex data workflows with confidence. We are hiring a Research Engineer to own the improvement loop for a research engine we are building on top of the Seqera Platform.

You will build the data and evaluation flywheel from engine' own run data, and use it to post-train small, task‐specific models that make it better at generating, ranking and running scientific ideas. This is an in‐office role in Barcelona. Design and build the evaluation suite that defines what "better" means for an autonomous research agent.

Build the pipeline that turns messy, real‐world run data from deployments into a training‐ready corpus. Run repeated training cycles on evolving data. Participate in journal clubs, stay at the frontier of post‐training specialized models.

Own the Next‐Gen roadmap with our Founding Scientist:



what data unlocks what capability, and in what order. You have retrained models on changing data more than once and have dealt with regression and forgetting in practice: replay, data mixing, adapter strategies, eval gating. You work fluently in Python with the modern stack — PyTorch, transformers, TRL, PEFT, vLLM or their equivalents.

When the pipeline you need does not exist, you build it. You are comfortable when the data, the tooling and the direction are all incomplete at the same time. You want to work in‐office in Barcelona, or you are ready to move here.

Computational biology, chemistry or pharma exposure. Publications or technical reports in post‐training or continual learning. Versátil working hours.

Time off: 23 days for vacations per year, 3 days given by Seqera in December, and the national/public holidays according to your location. Private health insurance Home office allowance (valued over 1,000 USD) Learning and development budget per year (1,000 USD)

📌 Research Machine Learning Engineer (Hybrid) (Barcelona)
🏢 Seqera
📍 Barcelona