Senior Software EngineerLondon2 days a week on siteUp to £110,000 + EquityLooking to work on something meaningful? I''m currently helping a mission-led health tech start-up who are using AI to remove admin overload, freeing up doctors and clinicians to do what they do best: care.They''re tackling complex, data-heavy workflows with intelligent automation. The result? Faster decisions. Better care. Less burnout. And millions of lives already improved.They''re looking for a Senior Full Stack Engineer to join our founding tech team and help scale the impact even further.What You''ll Be DoingTake real ownership across the full development life cycle - from idea to productionWork closely with our CTO and CEO to shape the product roadmapArchitect, build and maintain full stack systems (Python or C# + modern JS)Integrate LLMs into real-world applications - and explore where AI can go nextBuild scalable, cloud-native web servicesCollaborate with users and iterate quickly based on real feedbackWhat We''re Looking For3+ years of experience building scalable systems with Python or C#Strong Front End experience (React, Vue, Angular - your choice)Cloud architecture know-how (AWS, Azure, GCP - any flavour works)Solid understanding of relational databasesBackground in Computer Science, Engineering, Maths, or similarExperience in a start-up, greenfield, or high-autonomy team environmentPassionate problem-solver with a bias for ownership and impactBonus Points If You''ve shipped LLM-based prod