Staff Machine Learning Engineer

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 Technical Lead, Machine Learning, you own the execution layer of the company's intelligence - translating research direction into reliable, scalable, production-grade ML systems. This role sits at the intersection of research, infrastructure, and product: you're responsible for making models trainable, deployable, observable, and performant under real-world constraints.

What You'll Do

• Own end-to-end ML system execution: data pipelines, training workflows, evaluation systems, inference architecture, deployment
• Fine-tune and adapt models using state-of-the-art methods - LoRA, QLoRA, SFT, DPO, distillation
• Architect and operate scalable inference systems, balancing latency, cost, and reliability
• Design and maintain data systems for high-quality synthetic and real-world training data
• Implement evaluation pipelines covering performance, robustness, safety, and bias, in partnership with research leadership
• Own production deployment, including GPU optimization, memory efficiency, latency reduction, and scaling policies
• Collaborate closely with application engineering to integrate ML systems cleanly into backend, mobile, and desktop products
• Make pragmatic trade-offs and ship improvements quickly, learning from real usage
• Work under real production constraints: latency, cost, reliability, and safety

Requirements

• You've built or shipped real ML systems used by people, not just demos
• You're comfortable working with large models and understanding their failure modes
• You write strong, production-grade code and care about system correctness
• You're self-directed, pragmatic, and take full ownership of outcomes
• You communicate clearly and collaborate well in small, high-trust teams

Location

Remote, open to candidates in Poland, Portugal, Spain, Sweden, Switzerland, Germany, Ireland, Indonesia, Seoul, or Singapore.

Tech Stack

Python · PyTorch / JAX · GPU-based training and inference systems

What Success Looks Like

• Research and models reliably translate into production-ready solutions with clear performance and quality targets
• ML pipelines, training loops, and inference systems are stable, efficient, and maintainable
• Production issues are detected, debugged, and resolved quickly, minimizing user impact
• Team members are supported, aligned, and able to deliver high-impact ML work with minimal friction
• Iterations on models and systems are measurable, safe, and improve user experience over time

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. To be considered, please make sure to answer the screening questions in the application form - we're not able to review submissions that skip them.