Senior Software Engineer at Thriva Limited

Job Title

Senior Software Engineer

Thriva Limited - Personalized health-tech platform scaling proactive at-home testing.

Join a small, high-impact product team leveraging cutting‑edge AI to bridge the gap between lifespan and healthspan. As a Senior Engineer, you will build and evolve the backend systems powering both direct‑to‑consumer and B2B health platforms. You'll work across a modern Ruby on Rails and Type Script stack to deliver clinical insights at scale.

London, UK

• Work at the forefront of health‑tech using AWS Bedrock and Langfuse to integrate AI‑driven insights into personalized patient health journeys.
• Join a collaborative, high‑autonomy environment that biases toward action, utilizing modern tooling like Terraform, Kubernetes, and automated CI/CD pipelines.
• Enjoy a wellness‑focused culture including a monthly £100 Thriva credit, an annual "treat yourself" budget, and a well‑equipped central London office.

• Design and evolve scalable backend architectures using Ruby on Rails to support complex clinical data and asynchronous messaging systems.
• Collaborate cross‑functionally with designers and product managers to shape product outcomes and proactively solve ambiguous technical challenges.
• Implement modular, well‑tested code across the stack while exploring AI‑assisted development workflows to increase team velocity and impact.

• Possesses 5+ years of commercial software experience with deep expertise in Ruby on Rails and designing production‑grade backend systems.
• Demonstrates a pragmatic, action‑oriented mindset with the ability to break down complex problems into modular, maintainable code using RSpec or Jest.
• Shows curiosity for modern frontend frameworks like Vue3 or Nuxt and an active interest in staying ahead with AI‑driven development tools.