Member of Technical Staff, Machine Learning (remote, Spain)

About the Client

Our client is an AI-native product company built to replace how billions of people manage their digital lives - starting with email, notes, and task tools that were never designed to be AI-native. It's backed by multi-million-dollar investment and built remote-first from day one, with a clear target: cut the time it takes users to get everyday things done by roughly 90%. That means solving the problems most AI products avoid - long-running workflows, persistent context, and reliable behavior under real-world, non-deterministic conditions. The team is small and high-talent-density by design, not by necessity, and moves at a pace that matches the scale of what it's building.

About the Role

As a Member of Technical Staff, Machine Learning, you'll build core ML components and work on real production systems from day one - learning how large-scale ML behaves outside of research settings. This role is for engineers who want to develop strong systems judgment by shipping, debugging, and iterating on real-world ML.

What You'll Work On

• Build and improve ML components across data, training, evaluation, and inference
• Fine-tune and adapt models as part of larger production systems
• Implement evaluation and testing to understand model behavior
• Help build and maintain data pipelines for real-world and synthetic data
• Debug model issues, performance problems, and production incidents
• Ship improvements iteratively and learn from real user feedback
• Work closely with senior ML engineers and product teams
• Work under real production constraints: latency, cost, reliability, and safety

Requirements

• Strong foundations in machine learning and modern neural architectures
• Some hands-on experience training, fine-tuning, or deploying ML models
• Comfortable writing production-quality code and learning new tools quickly
• Curious, coachable, and eager to learn from real production systems
• Able to work through ambiguity with guidance, growing ownership over time
• A bias toward shipping, iteration, and continuous improvement

Tech Stack

Python - PyTorch / JAX - production ML systems running on GPUs

What Success Looks Like

• ML models in production meet accuracy, latency, and reliability targets
• Production issues are found quickly, debugged effectively, and root-caused
• Data pipelines, training loops, and inference systems stay robust, reproducible, maintainable
• Effective collaboration with engineers, product, and research to ship reliable ML-powered features
• Iteration is driven by real-world signals and measurable improvement

What to Expect

The best products in the world are built by small, world-class teams. Decisions are made collectively, at rapid speed - balancing high-quality shipping with fast learning. You'll be expected to bring structure, exercise judgment, and execute independently.

Compensation and benefits are competitive and vary by location; the package includes base salary and equity, discussed openly with you as part of the process.

If there's a fit, expect 3-4 interviews total, followed by a prompt, transparent decision.