Machine Learning Engineer (Global Public Sector) in London

About Scale

Scale's mission is to develop reliable AI systems for the world's most important decisions. Our core work consists of:

• Creating custom AI applications that will impact millions of citizens
• Generating high-quality training data for national LLMs
• Upskilling and advisory services to spread the impact of AI

Scale is hiring ML Research Engineers to bridge the gap between frontier research and real-world impact. While we solve critical challenges for global governments, your role will extend beyond implementation. You will lead the charge in research into Agent design, Deep Research and AI Safety/reliability, developing novel methodologies that not only power public sector applications but set new standards across the entire Scale organisation.

Your Mission

• Frontier Research & Publication: Leading research into LLM/agent capabilities, reasoning, and safety, with the goal of publishing at top-tier venues (NeurIPS, ICML, ICLR).
• Cross‐Org Impact: Developing generalized techniques in Agent design, AI Safety, and Deep Research agents that scale across our commercial and government platforms.
• Mission‐Critical Applications: Engineering high‐stakes AI systems that impact millions of citizens globally.

You Will

• Pioneer Novel Architectures: Design and train state‐of‐the‐art models and agents, moving beyond 'off‐the‐shelf' solutions to create custom architectures for complex public sector reasoning tasks.
• Lead AI Safety Initiatives: Research and implement robust safety frameworks, including red teaming, alignment (RLHF/DPO), and bias mitigation strategies essential for sovereign AI.
• Drive Deep Research Capabilities: Develop agents capable of long‐horizon reasoning and autonomous information synthesis to solve complex problems for national security and public policy.
• Publish and Contribute: Represent Scale in the broader research community by publishing high‐impact papers and contributing to open‐source breakthroughs.
• Consult as a Subject Matter Expert: Act as a technical authority for public sector leaders, advising on the theoretical limits and safety requirements of emerging AI.
• Build Evaluation Frontiers: Create new benchmarks and evaluation protocols that define what success looks like for high‐stakes, non‐commercial AI applications.

Ideally, You'd Have

• Advanced Degree: PhD or Master's in Computer Science, Mathematics, or a related field with a focus on Deep Learning.
• Research Track Record: A portfolio of first‐author publications at major conferences (NeurIPS, ICML, CVPR, EMNLP, etc.).
• Engineering Rigor: Strong proficiency in Python, deep learning frameworks (PyTorch/JAX), with the ability to write production‐ready code that scales.
• Safety Expertise: Experience in alignment, robustness, or interpretability research.

Nice to Haves

• Experience with large‐scale distributed training on massive clusters.
• Experience in building agentic systems that are reliable.
• Experience in Sovereign AI or working with highly regulated data environments.
• A zero‐to‐one mindset: Comfortable navigating ambiguity and defining research directions from scratch.

Legal and Compliance Statements

We believe that everyone should be able to bring their whole selves to work, which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability status, gender identity or Veteran status.

We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at accommodations@scale.com.

We comply with the United States Department of Labor's Pay Transparency provision.