Senior IDAM Engineer(38871)

Holland Barrett; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Health Cash Plan

Life Assurance

Incentive Scheme - Based on company &

Virtual GP

Private Medical care

Free at-home blood test kit

Holiday Purchase option

Pension Contribution scheme

Access to Wellhub with gyms, studios,和

25% Colleague Discount with Free Std. 

Exclusive Discounts from partners

£/€50 Annual Product Allowance

Job summary

Holland & Barrett is seeking a Senior IdAM Engineer to design, build and evolve a modern Identity Platform. You will own solutions from design to production, collaborating across Engineering, Architecture, Infrastructure and Security to deploy scalable, secure identity services.

Key responsibilities include implementing authentication, authorization, SSO and federation using Keycloak or similar platforms, driving IaC automation and contributing to architecture decisions.

Qualifications

• Significant experience in Software Engineering, Platform Engineering, Backend Engineering, Security Engineering or Identity Engineering.
• Strong programming skills, with experience building production services, APIs and integrations.
• Hands-on knowledge of Identity protocols, including OAuth 2.0, OpenID Connect (OIDC) and SAML.
• Experience designing and implementing SSO, MFA, federation, authentication and authorisation solutions.
• Experience with modern Identity platforms such as Keycloak or comparable technologies.
• Knowledge of cloud-native architecture, distributed systems and Infrastructure as Code.
• Experience with CI/CD pipelines, automated testing, monitoring and production troubleshooting.
• Strong problem-solving skills, with the ability to investigate complex issues and identify root causes.
• Confidence in evaluating technical approaches, challenging requirements and communicating engineering trade-offs.
• A collaborative mindset, with the ability to influence technical decisions and support other engineers.

Responsibilities

• Design, build and enhance scalable, secure and reusable Identity Platform services, APIs and integrations.
• Develop production-quality software, automation and tooling that simplifies Identity integration across applications.
• Design and implement authentication, authorisation, Single Sign-On (SSO) and federation solutions.
• Evaluate and work with modern Identity technologies, including Keycloak, to support our long-term platform strategy.
• Use Infrastructure as Code (IaC) to automate platform infrastructure and configuration.
• Investigate and resolve complex technical issues across applications, authentication flows, infrastructure and Identity services.
• Improve platform reliability, observability, performance and security.
• Collaborate with Engineering and Product teams to deliver consistent Identity solutions and reduce bespoke implementations.
• Lead technical discussions, contribute to architecture decisions and champion engineering best practices.
• Mentor and support fellow engineers, encouraging knowledge sharing and continuous improvement.

Skills

OAuth 2.0

OIDC

SAML

SSO

MFA

Keycloak

Go

Terraform

CI/CD

Identity Engineering

Software Engineering

Problem Solving

Tools

Keycloak

Terraform

Job description

Join Holland & Barrett and help shape the future of Identity Engineering. At Holland & Barrett, we're on a mission to make health and wellness a way of life for everyone. Technology plays a vital role in helping us deliver that ambition, and we're continuing to invest in the platforms that support our customers, colleagues and partners. We're looking for a Senior Identity & Access Management (IdAM) Engineer to help design, build and evolve our Identity Platform, creating secure, scalable and reusable solutions that power our digital experiences. This isn't your typical IAM administration role. We're looking for a passionate software engineer with strong Identity expertise who enjoys solving complex technical challenges, developing production-quality software and influencing engineering decisions. You'll have the opportunity to shape the future of Identity at Holland & Barrett, working with modern technologies, including Keycloak, while helping establish the standards, tools and capabilities used across our Engineering teams.

The Role

As a Senior IdAM Engineer, you'll play a key role in developing a modern, federated Identity Platform that enables our teams and partners to integrate authentication and identity capabilities securely and efficiently. Working collaboratively across Engineering, Architecture, Infrastructure and Security, you'll take ownership of technical solutions from initial design through to production.

Your key responsibilities will include:

• Design, build and enhance scalable, secure and reusable Identity Platform services, APIs and integrations.
• Develop production-quality software, automation and tooling that simplifies Identity integration across applications.
• Design and implement authentication, authorisation, Single Sign-On (SSO) and federation solutions.
• Evaluate and work with modern Identity technologies, including Keycloak, to support our long-term platform strategy.
• Use Infrastructure as Code (IaC) to automate platform infrastructure and configuration.
• Investigate and resolve complex technical issues across applications, authentication flows, infrastructure and Identity services.
• Improve platform reliability, observability, performance and security.
• Collaborate with Engineering and Product teams to deliver consistent Identity solutions and reduce bespoke implementations.
• Lead technical discussions, contribute to architecture decisions and champion engineering best practices.
• Mentor and support fellow engineers, encouraging knowledge sharing and continuous improvement.

What We're Looking For

We're looking for an experienced engineer who combines strong software development skills with deep technical knowledge of Identity and Access Management.

What You'll bring:

• Significant experience in Software Engineering, Platform Engineering, Backend Engineering, Security Engineering or Identity Engineering.
• Strong programming skills, with experience building production services, APIs and integrations.
• Hands‑on knowledge of Identity protocols, including OAuth 2.0, OpenID Connect (OIDC) and SAML.
• Experience designing and implementing SSO, MFA, federation, authentication and authorisation solutions.
• Experience with modern Identity platforms such as Keycloak or comparable technologies.
• Knowledge of cloud-native architecture, distributed systems and Infrastructure as Code.
• Experience with CI/CD pipelines, automated testing, monitoring and production troubleshooting.
• Strong problem‑solving skills, with the ability to investigate complex issues and identify root causes.
• Confidence in evaluating technical approaches, challenging requirements and communicating engineering trade‑offs.
• A collaborative mindset, with the ability to influence technical decisions and support other engineers.

It would be great if you also have:

• Hands‑on experience with Keycloak, including custom extensions, identity brokering, federation, scaling or high availability.
• Experience developing software using Go.
• Experience with Terraform and infrastructure automation.
• Experience supporting large‑scale Identity services across customer‑facing and workforce applications.

Why Join Holland & Barrett?

This is an exciting opportunity to help build and shape an Identity Platform, rather than simply maintain an existing solution. You'll have the opportunity to influence architecture, technology choices and engineering standards while working on meaningful challenges across our digital ecosystem. You'll be joining a collaborative environment where your ideas matter, your technical expertise is valued and you'll have the autonomy to drive improvements that make a real difference.

What we offer:

Wellbeing & Lifestyle Benefits

• Health Cash Plan
• Life Assurance
• Incentive Scheme - Based on company & personal performance
• Virtual GP
• Private Medical care
• FREE at-home blood test kit
• Holiday Purchase option
• Pension Contribution scheme
• Access to ‘Wellhub' with gyms, studios and wellbeing apps

Discounts & Savings

• 25% Colleague Discount with FREE Standard Delivery
• Exclusive Discounts from a wide range of partners
• £/€50 Annual Product Allowance to spend in store

Learning & Development

• Access to a variety of learning opportunities, including Level 2-5 Apprenticeships, Workshops and our Digital Learning Library
• AND MORE!

Holland and Barrett is an equal opportunity employer. We welcome diverse perspectives and are committed to creating an inclusive environment for all colleagues. We understand that when our colleagues are listened to, respected and valued for who they are, we build an organisation with belonging at its heart – making health and wellness a way of life for everyone.

Holland & Barrett does not accept unsolicited resumes from search firms/recruiters. Please do not forward resumes to our job alias, employees, or any other company location. Holland & Barrett is not and will not be responsible for any fees if a candidate submitted by a search firm/recruiter unless otherwise agreed with respect to specific open position(s).