AI Engineer

Stack

Responsibilities

• ▹Research, design and train models suited to the specific needs of the products
• ▹Fine-tune existing open-source and foundation models to maximize accuracy and performance
• ▹Own the full model lifecycle: data curation, experimentation, evaluation and production deployment
• ▹Collaborate with mobile and backend engineers to integrate models directly into the apps
• ▹Define and track the metrics that drive quality and continuously improve them

Requirements

• ▹Degree in Computer Science, Electrical Engineering, Mathematics, Physics or a related technical field
• ▹Hands-on experience training or fine-tuning deep learning models used in production
• ▹Strong Python skills and experience with ML frameworks (PyTorch or JAX preferred)
• ▹Comfort with the full model development cycle: data pipelines, experiment tracking, evaluation, deployment and scaling
• ▹Solid understanding of modern model architectures and when to apply them
• ▹Ability to work autonomously, make decisions under uncertainty and ship without waiting for perfect conditions
• ▹Active use of AI tools as a genuine productivity multiplier in your own workflow
• ▹Clear and direct communication: explaining technical decisions to non-technical stakeholders and flagging blockers early

Nice to have

• ▹Master's or PhD in machine learning or a related area, though equivalent depth shown through your work is accepted
• ▹Strong GitHub and/or Hugging Face profile
• ▹Experience with the Hugging Face ecosystem (Transformers, Datasets, Hub)
• ▹Experience across multiple model domains (vision, audio, NLP, multimodal)
• ▹Familiarity with on-device or edge inference optimization (quantization, distillation, ONNX)
• ▹Experience integrating ML models into mobile or production environments
• ▹Published research or open-source contributions in ML

Soft skills

What we offer

• ▹Attractive compensation, above market average
• ▹Hybrid work model based in Barcelona
• ▹High ownership from day one: you define the direction
• ▹Work directly with the founders and a senior, low-ego team
• ▹A real product with real users and immediate, measurable impact

About the company

Labhouse is a Barcelona-based startup studio building AI-powered mobile apps (such as Invoice Fly and Summary AI) on a subscription model. It was founded by the duo behind SocialPoint.