Behavioural Science Lead

Why Oviva?

At Oviva, we're on a mission to make sustainable, personalized, clinically effective care accessible to everyone.

Our digital programmes support people living with weight related illnesses. While weight loss is a goal for many, our approach is about so much more: improving health, building confidence, and enhancing quality of life.

We've already supported over one million people across the UK, Switzerland, Germany, and Poland – and we're just getting started. Every conversation, coaching session, and line of code brings us closer to a healthier future. Join us, and be part of the team making that future possible.

To further scale our growing impact, we are looking for a Behavioural Science Lead – AI , based in the UK, Germany, or Poland .

The Role

This is a unique opportunity to join Oviva at the intersection of behavioural science and artificial intelligence.

As our Behavioural Science Lead – AI , you will be embedded within our AI squads, contributing directly to the design, testing, and deployment of hyperpersonalised digital health interventions. Your work will empower AI-powered coaching and decision support tools that make care more effective, equitable, and scalable.

You will collaborate cross-functionally with data scientists, engineers, clinical leads, product managers, and content designers to bring evidence-based behavioural models into digital practice - making a measurable impact on how users engage, change, and succeed in their health journeys.

• MSc or PhD in Behavioural Science, Health Psychology, or related discipline.
• At least 5 years of applied experience in digital behavioural interventions.
• Proven application of models like COM-B or BCW in product or AI contexts.
• Ability to distil complex concepts into clear, actionable product logic.
• Experience working with data teams and understanding experimental design.
• Strong communication skills and professional fluency in English.

Bonus points for:

• Experience in consumer health or medtech apps.

• Exposure to AI/ML lifecycle or adaptive digital journeys.

• Design and validate behavioural components of our AI-driven personalisation engine (e.g. tailoring for nudges, feedback and patient support messaging, decision trees, adaptive journeys).

• Translate behavioural models (COM-B, BCW, BCT taxonomy) into scalable product features powered by data.
• Partner with data and engineering teams to embed behavioural logic into algorithms, ensuring prompts produce effective and action-oriented messages.
• Act as a lead in sprint cycles, ensuring interventions are evidence-informed and outcome-focused.
• Define and lead experiments (e.g., A/B tests) to evaluate the effectiveness of behavioural interventions at scale.
• Monitor behavioural engagement metrics (user engagement and other data) and iterate to improve outcomes and refine behavioural strategies.
• Champion behavioural best practices within product and clinical teams.

• Bring a clinical mindset to AI feature development, ensuring outputs are safe, equitable, and aligned with Oviva's therapeutic goals.

• A chance to transform healthcare at scale and shape next-generation solutions.

• Dynamic, purpose-driven role within a high-growth, supportive team.
• Training and development, including a personal learning allowance.
• Flexibility in when and where you work, plus a home office allowance.
• Competitive salary and pension contribution.
• Enhanced maternity, paternity & adoption leave.
• Attractive benefit package, which will be shared on the first interview stage (site-dependent).

Our Culture & Values

At Oviva, we take culture seriously. We live by three principles:

• We put the patient first
• We empower our teams
• We make it happen

We are proud to be a Disability Confident Employer and are passionate about creating an inclusive culture. We actively welcome applicants from all backgrounds, including underrepresented groups.

Ready to shape the future of digital health?

Apply now and join a team where your work truly matters.