Lead Product Development Manager

Harnham is a well-established digital media and entertainment organization operating at scale, delivering streaming and content services to a broad customer base. They are seeking a Lead Product Development Manager to take ownership of product strategy and roadmap for identity, authentication, and onboarding experiences, impacting customer experience and commercial outcomes.

Responsibilities:

• Own the end-to-end product strategy and roadmap for identity, authentication, and free-tier onboarding experiences
• Write clear, detailed product requirements including acceptance criteria, edge cases, and technical considerations
• Translate complex authentication flows such as SSO, OAuth and entitlement logic into build-ready specifications
• Partner closely with engineering, design, and cross-functional stakeholders to drive delivery from discovery through to launch
• Define KPI frameworks for authentication and onboarding, and use performance data to optimise conversion and activation
• Monitor the competitive landscape across streaming and digital identity, bringing insight into product decisions and roadmap prioritisation

Requirements:

• 5-7 Years experience owning products across the full lifecycle, from requirements definition through to launch and iteration
• Demonstrated ability to write detailed, high-quality product documentation that guides engineering and design teams
• Solid understanding of authentication and identity concepts such as SSO, OAuth, passkeys, or subscription entitlement flows
• Proven capability in defining KPIs, building dashboards, and using data to inform product decisions
• Experience working within OTT, streaming, or digital platforms, with knowledge of device ecosystems
• Confident stakeholder management skills, with the ability to communicate complex technical concepts clearly