Senior software engineer - identity

Salary: £62,000 - 90,000 per year Requirements: Professional experience with TypeScript, AWS, and Infrastructure-as-Code Experience developing and maintaining React-based JavaScript SPAs Experience with unit, integration, and end-to-end testing tools and practices Experience onboarding, integrating, and managing third-party platforms Understanding of microservices architectures and RESTful API development, including structuring, documenting, versioning, testing, and stubbing/mocking Experience operating within Agile development teams Excellent knowledge of HTML/CSS, JavaScript, and TypeScript Excellent working knowledge of modern JavaScript libraries and frameworks, including React and Hono or equivalent Understanding of the OAuth 2.0 framework and OpenID Connect flows (OIDC) Use of JSON Web Tokens and concepts related to asymmetric cryptography Fluent use of Git (GitLab/GitHub) and understanding of CI/CD and trunk-based development Awareness of website performance and accessibility best practices Advocate of excellent development practices including test-driven development, pairing, and mobbing Ability to write, assist in writing, or review technical documentation Hands-on experience with PingOne Advanced Identity Cloud, formerly ForgeRock, is desirable Experience with GraphQL and related technologies is desirable Ability to understand Java and/or PHP code is desirable Excellent communicator with good numerical skills Logical, analytical, and methodical approach to problem solving Pro-active, resourceful, and able to use initiative Effective time management Comfortable helping and consulting others Ability to collaborate over significant decisions and articulate effectively Approachable, friendly, and consistently positive and constructive Pragmatic and focused on delivery Willingness to learn and desire to develop professionally Tenacious, with pride in your work Continuous improvement mindset Desire to contribute to our organisations success and uphold our exceptional reputation Responsibilities: Build and run cloud-native applications with TypeScript and React Develop internal services deployed to AWS using serverless and container-based infrastructure Establish and maintain high automated test coverage for our services Write high-quality, secure, and performant code Advocate for continuous improvement across quality, security, performance, and CI/CD processes Document solutions and drive architectural decisions within the team Learn and apply new technologies and techniques embraced by our development team Build strong working relationships within our team and across Hargreaves Lansdown Participate in working groups and communities of practice that support the development team Provide engineering support for existing applications when necessary Coach and mentor peers Engage with external stakeholders such as security, enterprise architecture, and downstream consumers of our services Evangelise best practices and help the team avoid anti-patterns Technologies: API AWS CI/CD Cloud Cryptography CSS Git GitHub GitLab GraphQL Support JSON Java JavaScript OAuth OpenID PHP React Security Serverless TypeScript Web microservices More: We are Hargreaves Lansdown, and we are looking for a Senior Engineer to join our Identity team as part of a major transformation programme. You will help us migrate our identity services to a new strategic platform, shaping how millions of customers securely access our products and services while making delivery easier for internal teams. We offer the opportunity to work on high-impact engineering within a collaborative environment that values quality, drive, entrepreneurial activity, continuous improvement, and outstanding client service. last updated 25 week of 2026