Senior Software Engineer – Identity

Hargreaves Lansdown

Senior Engineer delivering migration of identity services for millions of customers at Hargreaves Lansdown. Working with cloud-native applications and advocating for continuous improvement in processes.

Posted 6/12/2026full-timeBristol • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

AWSJavaScriptMicroservicesReactTypeScript

About the role

Key responsibilities & impact

Help deliver the migration of our identity services to a new strategic platform.
Shape how millions of customers securely access our products and services.
Make delivery easier for internal teams.
Advocate for continuous improvement within the team including for the quality, security and performance and the CI/CD processes.
Document all solutions, as well as driving architectural decisions within the team.
Cultivate strong working relationships both within the team and across HL as a whole.
Actively participate in working groups and communities of practice designed to support the development team.
Provide engineering support for existing applications when necessary.
Proactively coach & mentor to peers.
Evangelise best practices and assist the team in avoiding anti-patterns.

Requirements

What you’ll need

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 of onboarding, integrating and managing 3rd party platforms.
Understanding of Microservices architectures and the principles of 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, Hono or equivalent.
Understanding of the OAuth 2 Framework and Open ID Connect flows (OIDC).
Use of JSON Web Tokens and the concepts of asymmetric cryptography.
Fluent using Git (GitLab/GitHub), as well as understanding concepts related to 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.
Able to write, assist in writing or reviewing technical documentation.

Benefits

Comp & perks

Discretionary annual bonus * and annual pay review
25 days * holiday plus bank holidays and 1-day additional Christmas closure
Option to purchase an additional 5 days holiday **
Flexible working options available, including hybrid working
Enhanced parental leave
Pension scheme up to 11% employer contribution
Income Protection and Life insurance (4 x salary core level of cover)
Private medical insurance*
Health care cash plans - including optical, dental, and out patient care
Health screening programme
Help@hand - confidential support including mental health counselling and remote GP
Wellhub - unlimited access to fitness provider s and wellness coach sessions
Variety of travel to work schemes with bike storage and shower facilities
Inhouse barista and deli serving subsidised coffee and sandwiches
Two paid volunteering days per year * dependant on role level ** only available to select during our annual benefits window, in November each year

ATS Keywords

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Hard Skills & Tools

TypescriptAWSInfrastructure-as-CodeReactJavaScriptHTMLCSSMicroservicesRESTful APIGit

Soft Skills

coachingmentoringadvocacycollaborationcontinuous improvementdocumentationrelationship buildingparticipation in working groupsbest practices evangelismproblem-solving