Senior Machine Learning Engineer (Platform) - Bristol

In a world of immense uncertainty, digiLab is a pioneering AI company that empowers governments and organisations in safety-critical or highly regulated industries to solve critical, complex, and high-stakes challenges using machine learning and uncertainty quantification. From forging a path to clean energy to life-saving medical diagnostics and beyond, making critical decisions with unwavering confidence is difficult, especially when data is complex, sparse, or incomplete. This is where digiLab’s expertise shines through.

Our trustworthy and explainable AI platform, The Uncertainty Engine, supported by our team of machine learning specialists and data scientists, enables decision-makers to accelerate innovation, reduce the risk of failure, turn insight into action, and deliver greater value through more informed and confident decisions.

Summary

The Senior Machine Learning Engineer (Platform) is a full-time position (Monday to Thursday), reporting directly to the Lead Software Engineer. This role is central to the ongoing development and maintenance of digiLab's core product, The Uncertainty Engine. It sits at the intersection of probabilistic machine learning, uncertainty quantification, and large-scale scientific software, with a strong focus on Python development within a fast-paced, collaborative, and dynamic engineering environment.

The role

As a Senior Machine Learning Engineer (Platform) at digiLab, you will be responsible for:

• Collaborating with a cross-functional team of engineers and scientists to help lead on the design, development, and maintenance of high-quality software solutions.
• Collaborating with product management to translate business requirements into technical solutions.
• Contributing to architectural design, development, testing, and deployment of productionised probabilistic machine learning models and uncertainty quantification techniques.
• Building abstractions and APIs for probabilistic modelling, inference, and uncertainty propagation within The Uncertainty Engine.
• Supporting experimentation with amortised inference and surrogate models for expensive simulators.
• Optimising and scaling Monte Carlo–based methods.
• Utilising expertise in AWS, Python, MongoDB, and other relevant technologies to build scalable systems.
• Fostering a collaborative, learning-oriented environment within the team.
• Championing “Scrum” and contributing to team process improvements.
• Providing technical support and leading incident investigations.

Duties may evolve, and you may be asked to take on other reasonable responsibilities within your competence to support our growth.

Required Skills & Experience

• Demonstrable experience of developing machine learning software solutions with Python.
• Experience with probabilistic and statistical machine learning, including Bayesian methods, Monte Carlo techniques, and uncertainty-aware modelling.
• Familiarity with scientific Python libraries like NumPy, SciPy, and Pandas.
• Familiarity with machine learning libraries such as PyTorch and scikit-learn.
• Experience with DevOps and MLOps.
• Degree-level qualification in computer science or related field.
• Professional experience with collaborative software development.
• Familiarity with Linux, bash, and the command line.
• Ability to write logical, consistent, self-explanatory code.
• Understanding of software design patterns, SOLID and DRY principles, and architectural patterns.
• Experience with Git/GitHub and best practices.
• Knowledge of the software testing pyramid and types of automated testing (smoke, component, unit, performance, load, end-to-end).
• Experience with Docker and other containerization platforms.
• Proven ability to collaborate in a fast-paced "agile" team, preferably using "scrum".

In addition, some ‘nice to haves’ are:

• A Master’s-level qualification in a STEM field.
• Experience deploying infrastructure as code.
• Experience with UI/UX design principles.
• Familiarity with normalising flows and/or variational autoencoders.
• Publications in physics, engineering, or other simulation-heavy domains.

Location

On site. As an ambitious, rapidly-growing start-up, we’re looking for proactive, adaptable people who thrive in a fast-paced environment. Our standard working hours are 9.00–5.30pm, Monday to Thursday, though some flexibility outside these hours may be required to meet business needs.

Our Culture and Values

At digiLab, we prioritise work-life balance with a 4-day workweek (Monday to Thursday), offering a full-time salary and three-day weekends every week! Our team is built on strong connections, with regular socials like game nights, bouldering, and paddleboarding. We foster a culture of innovation, trust, and collaboration. Our values include:

• Creativity & Agility: Encouraging innovation and flexibility in goal achievement.
• Trust & Responsibility: Supporting each other in taking calculated risks for bold innovation.
• Open & Honest Collaboration: Ensuring transparent communication and alignment.
• High-Performance Standards: Continuously challenging ourselves to excel in delivery.
• Value-Driven Work: Regularly assessing our contributions toward company goals.

Benefits

We value enthusiasm and loyalty, and we’re committed to offering a great work-life balance. Along with the exciting challenges this role provides, we offer a range of benefits including:

• 4-day working week.
• Competitive Salary.
• BUPA private health care (via salary sacrifice).
• Company Cashplan.
• Cycle to work scheme.
• Referral Program.
• Company Events.
• Discretionary EMI scheme (eligible to be considered after one year with the company; participation is not guaranteed and is entirely at the company's discretion).

Equal Opportunities

digiLab is an equal opportunity employer. We welcome applications from candidates of all backgrounds and are committed to ensuring our recruitment processes are fair, inclusive, and legally compliant. We take equality, dignity, and non-discrimination seriously.

Final Note

We aim to respond to every applicant, but due to high application volumes, we may not be able to respond individually. Thank you for your interest in joining the digiLab team. The information you provide will be stored and used in line with our Privacy Notice.