Lead Product Engineer (Python) | Django, FastAPI, AWS | Identity & Authorisation | Okta, OAuth2, SSO, IAM | HealthTech and Research | AI Products at Global Scale | Remote | £110-130k + Bonus + Equity in Sheffield

The Company:

Trust, identity, and secure access are becoming foundational layers of modern AI-enabled software at scale. We’re partnering with a globally recognised technology company building products used by millions of users across research, AI, and enterprise environments. Their platform enables organisations to build better systems through high-quality human feedback, data infrastructure, and trusted user interactions. Following sustained growth and increasing global adoption, the business is investing heavily into its core platform engineering function - particularly around authentication, authorisation, and identity architecture as the platform scales internationally. This is a highly product-centric engineering environment where technical leadership, customer empathy, and engineering quality all carry equal weight.

The Role:

You’ll join as a hands-on Technical Lead within a senior product engineering organisation responsible for building and scaling critical platform capabilities used across the company’s ecosystem. A major focus of the role is leading the evolution of authentication and authorisation systems - helping shape secure, scalable identity infrastructure across both internal and customer-facing products. You’ll remain deeply technical while leading architectural direction, mentoring engineers, and partnering closely with Product, Design, Security, and Infrastructure teams to deliver highly scalable systems end-to-end. The environment is fast-moving, product-led, and highly collaborative - with strong engineering standards and genuine autonomy.

What You’ll Be Doing:

• Leading the design and evolution of authentication and authorisation systems
• Driving architecture across IAM, SSO, RBAC, OAuth2/OIDC, and user access workflows
• Building backend services and APIs in Python
• Leading high-impact technical initiatives from concept through production
• Partnering cross-functionally to shape product direction and platform strategy
• Mentoring and supporting engineers across technical design and delivery
• Helping scale engineering practices, reliability, and developer experience
• Balancing speed, pragmatism, and long-term maintainability

This is a highly ownership-driven Product Engineering environment where Technical Leads are expected to think commercially, technically, and from the customer perspective.

Tech Stack:

• Python
• Django, FastAPI / modern backend frameworks
• OAuth2 / OIDC
• Okta / Auth0 / identity platforms
• PostgreSQL
• AWS
• TypeScript (exposure beneficial)
• Modern CI/CD & cloud infrastructure

Why Join:

• Highly visible platform engineering challenges at global scale
• Strong engineering culture with low ego and high autonomy
• Direct influence on critical platform architecture
• Product-led environment with real technical ownership
• Remote-first across the UK with London collaboration space
• Competitive compensation package including bonus and equity
• Excellent benefits and long-term growth opportunities

If you’re an experienced Technical Lead who enjoys solving complex identity and platform engineering challenges - while building products with meaningful real-world impact - this is an exceptional opportunity to shape systems used globally. Apply with your CV and we’ll be in touch if there’s alignment :)