Senior ML Engineer

Senior ML Engineer

TechTree acts as the recruitment agency for this opportunity.

Location: London, United Kingdom
Working arrangement: On-site London preferred; remote with monthly office visits accepted
Employment: Full-time
Level: Mid-Senior Level

About the Client

Hypercritical.ai is a venture-backed AI/ML startup in West London developing a novel foundation model for fully automated, unsupervised software delivery in embedded control systems.

Candidate Requirements

• Expertise designing, architecting and implementing large-scale foundation models.
• Significant hands-on experience optimising and debugging deep learning models.
• Practical experience with distributed or large-scale training and inference.
• Deep understanding of a major deep learning framework, ideally PyTorch.
• Experience building and operating ML systems on cloud platforms.
• Passion and determination, with the ability to work through complex, ambiguous problems.
• Delivery focus and respect for timelines and commitments.
• Openness to disagreement.

What you will do:
- Lead the research, development, and production deployment of Hypercritical's foundation model.
- Define the long-term technical strategy for high-performance Machine Learning systems.
- Optimize the model for peak performance across diverse hardware and ensure scalability for exponential user growth.
- Serve as the technical guardian for the model's quality and Service Level Objectives (SLOs).
- Provide a hands-on solution architecture for the core ML infrastructure.
- Select, evaluate, and implement state-of-the-art technologies (e.g., distributed training, specialized hardware, efficient serving frameworks).
- Profile and optimize the end-to-end ML stack: data pipelines, training loops, inference serving, and deployment.
- Design and implement GPU-accelerated components, including custom CUDA kernels where off-the-shelf libraries are not enough.
- Work closely with the founders to translate product requirements into concrete optimization goals and technical roadmaps.
- Build internal tooling, benchmarks, and evaluation harnesses that make it easy for the rest of the team to experiment, debug, and ship safely.

Why Join the Client:
- You'll make a significant impact, getting in on the ground floor of a company that will alter software development forever.
- You will shape how a never-before-seen foundation model is trained, optimized, and deployed.
- The client emphasises transparency and direct, honest communication.

About the Interview:
- No live or take-home coding tasks. 2 interviews max, 1hr (cultural, online) with CEO and 2hr (technical, face-to-face) with CPO.
- Ask anything, full honesty is welcomed. The client welcomes candid questions.