About ENSEK
ENSEK builds the cloud‑native SaaS software that’s transforming how energy retailers operate, innovate and manage at scale.
We help retailers lower operating costs, improve billing accuracy for consumers, and enhance customer experience through automation and AI‑driven insight, all underpinned by modern, cloud‑native architecture.
ENSEK is at an exciting inflection point as we scale at pace towards new international horizons. If you’re driven by solving complex, real‑world problems and want to build modern technology that accelerates the global energy transition, you’ll feel right at home with us.
Position Summary
The Product Manager – API & Identity/Access Management owns two foundational platform capabilities at ENSEK: how APIs are designed, governed, and consumed, and how identity, permissions, and auditing are managed across the platform, including for AI agents.
This role ensures ENSEK’s APIs are consistent, discoverable, and reliable for internal teams, customers, brokers, and third parties, while also evolving identity and access management (IAM) to meet growing security and regulatory needs. You’ll work closely with engineering, security, and commercial teams to make sure APIs and IAM act as enablers of product velocity, not friction points. This is a platform‑level product role, focused on standards, governance, and scalability rather than individual feature delivery.
Key Accountabilities & Responsibilities
Own the strategy, vision and roadmap for API as a product, establishing consistent frameworks for API definition, versioning, documentation and lifecycle management across three API tiers: internal domain APIs, internal cross-NSEC APIs, and external customer/broker/third-party APIs.
Define and drive adoption of API governance standards, ensuring all teams building APIs follow consistent patterns that improve developer experience, reduce integration burden, and enable reliable external commercialisation of ENSEK's platform capabilities.
Own the identity and access management (IAM) product roadmap, expanding existing IAM capabilities to encompass AI agents as first-class principals — defining how agents authenticate, what permissions they hold, and how their actions are audited.
Rationalise the current API estate — cataloguing existing endpoints, identifying inconsistencies, and building a prioritised plan to standardise management approaches without disrupting live integrations.
Represent the needs of external API consumers (customers, brokers, third parties) in internal discussions, using research and data to advocate for developer-friendly API design and clear contractual guarantees.
Build long-term relationships with commercial, engineering and security stakeholders, influencing API and IAM strategy across domains and aligning teams around shared standards.
Create and maintain PRDs and specifications for API management tooling and IAM capabilities, leveraging AI to accelerate documentation and using data to drive continuous improvement.
Key Outcomes
Consistent API governance framework adopted across all three API tiers (internal domain, cross-NSEC, external), with clear standards for definition, versioning and lifecycle management.
External API proposition strengthened — customers, brokers and third parties experience reliable, well-documented and consistently managed integrations.
IAM capabilities extended to support AI agents as principals, with authentication, authorisation and auditing requirements defined and road mapped.
Auditing framework for agentic systems live, providing full traceability of agent actions across the platform.
Defined and tracked KPIs for API health, adoption and IAM coverage, with regular data-driven reviews shared with stakeholders.
Skills, Knowledge, Experience & Qualifications
Demonstrable experience owning and delivering platform or developer-facing product areas — ideally API management, developer portals, integration platforms or identity/access management.
Strong understanding of API design principles (REST, GraphQL, OpenAPI), API lifecycle management, and developer experience best practices.
Familiarity with identity and access management concepts including OAuth, OIDC, RBAC/ABAC patterns, and emerging agentic identity considerations.
Ability to make autonomous, data-informed product decisions and communicate them clearly across technical and commercial audiences.
Experience in evolving SaaS, platform, utility tech or API-first product environments is strongly advantageous.
Understanding of security and compliance requirements for external API exposure and agentic systems is a plus.
Company Benefits
25 days’ holiday + bank holidays
Option to buy or sell 5 extra annual leave days per year
Vitality Health Insurance, including private healthcare, virtual GP access, mental‑health support and wellbeing perks (50% off gym memberships -Virgin Active, Nuffield, PureGym)
Pension with 5% matched contribution
Regular team‑wide and company‑wide events
2 volunteering days per year to give back
Remote‑first working environment with offices in London and Nottingham
ENSEK
Juniper Square
Descript
CoinGecko
Qualia
ENSEK
ENSEK
ENSEK