Senior Data Scientist

Praxy; United Kingdom; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

Faculty in the United Kingdom is seeking a Senior Data Scientist to lead high-impact AI projects and define technical direction. You will mentor junior colleagues, design robust software architectures, and ensure delivery excellence while building strong client relationships.

This role involves on-site work 2–4 days per week with UK clients, with flexibility to work from our London office or remotely within the UK.

Qualifications

• Senior experience in data science or quantitative field.
• Fluent Python programming with NumPy/Pandas.
• Deep learning framework experience (PyTorch).
• Leadership mindset to grow technical capabilities of the team.
• Commercial awareness with client-facing work.
• Strong project planning and ability to estimate timelines.

Responsibilities

• Lead high-impact AI projects and shape technical direction.
• Define data science approaches and software architectures for engagements.
• Mentor junior data scientists and support technical growth of the team.
• Build client relationships and shape project scope for feasibility.
• Contribute to Faculty’s thought leadership and best practices.

Skills

Python

NumPy

Pandas

Leadership

Client-facing experience

Tools

PyTorch

Job description

We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, we’ve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here https://faculty.ai/impact.

We don’t chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence.

Our business, and reputation, is growing fast and we’re always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology.

AI is an epoch-defining technology, join a company where you’ll be empowered to envision its most powerful applications, and to make them happen.

ABOUT THE TEAM

Our Defence team is focused on building and embedding human-centered AI solutions which give our nation a competitive edge in the defence sector. We collaborate with our clients to bring ethical, reliable and cutting-edge AI to high-stakes situations and maintain the balance of global powers essential to our liberty.

Because of the nature of the work we do with our Defence clients, you will need to be eligible for UK Security Clearance (SC) and willing to work between 2 to 4 days per week on-site with these customers which may require travel to locations throughout the UK.

When not required on client sites, you’ll have the flexibility to work from our London office or remotely from elsewhere within the UK.

ABOUT THE ROLE

As a Senior Data Scientist, you will lead high-impact AI projects and shape the technical direction of bespoke solutions. This role requires hands-on technical excellence combined with crucial team leadership.

You will define data science approaches, design robust software architectures, mentor junior colleagues, and ensure delivery rigor across projects all while building deep client relationships and solidifying our reputation as a leader in practical, measurable AI.

WHAT YOU'LL BE DOING

• Mapping the end-to-end data science approach and designing the associated software Leading project teams that deliver bespoke algorithms and high-stakes AI solutions to clients across the sector.
• Conceiving the core data science approach and designing the associated robust software architecture for new engagements.
• Mentoring a small number of data scientists and supporting the professional growth of technical team members on projects.
• Partnering with commercial teams to build client relationships and shape project scope for technical feasibility.
• Contributing to Faculty’s thought leadership and reputation through delivering courses, public speaking, or open-source projects.
• Ensuring best practices are followed throughout the project lifecycle to guarantee high-quality, impactful delivery.

WHO WE'RE LOOKING FOR

• You possess senior experience in a professional data science position or a quantitative academic field.
• You demonstrate strong programming skills, with the ability to be a fluent Python programmer, using core libraries (NumPy, Pandas) and a deep-learning framework (e.g., PyTorch).
• You have a deep expertise in core data science paradigms (supervised/unsupervised, NLP, validation), demonstrating a proficiency across the standard data science toolkit, including the ability to develop new, innovative algorithms.
• You bring a leadership mindset, focused on growing the technical capabilities of the team and nurturing a collaborative culture.
• You exhibit commercial awareness, with experience in client-facing work and the ability to translate business problems into a rigorous mathematical framework.
• You are skilled in project planning, assessing technical feasibility, estimating delivery timelines, and leading a team to deliver high-quality work on a strict schedule.

• Talent Team Screen (30 minutes)
• Take Home Technical Test
• Technical Interview (90 minutes)
• Commercial Interview (60 minutes)

#LI-PRIO

OUR RECRUITMENT ETHOS

We aim to grow the best team - not the most similar one. We know that diversity of individuals fosters diversity of thought, and that strengthens our principle of seeking truth. And we know from experience that diverse teams deliver better work, relevant to the world in which we live. We’re united by a deep intellectual curiosity and desire to use our abilities for measurable positive impact. We strongly encourage applications from people of all backgrounds, ethnicities, genders, religions and sexual orientations.

A note on AI: we're happy for you to use it for research and interview prep, but please don't use it to generate answers during live interviews. We also use an AI note-taker (Metaview) in interviews so interviewers can stay present (which you can opt out of just let us know,) and every application is reviewed by a human, never decided by AI.

Ask about fit, your resume, or how to prepare.

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