Senior Software Engineer - Transfers; Client Journeys

Position: Senior Software Engineer - Transfers (Client Journeys)
## Senior Software Engineer - Transfers (Client Journeys)
Apply locations:
Bristol (Harbour side) time type:
Full time posted on:
Posted Todaytime left to apply:
End Date:
June 28, 2026 (17 days left to apply) job requisition :
R9214# Excited to grow your career?##
** Our purpose is to make it easy for people to save and invest for a better future. We are looking for great people to join us, so please come and invest in YOUR future at Hargreaves Lansdown.
** We know that sometimes people can be put off applying for a job if they don't tick every box. If you're excited about working for us and have most of the skills or experience we're looking for, please go ahead and apply. We’d love to hear from you!

About the role# We're looking for a Senior Full-Stack Engineer to develop and maintain our suite of transfer applications. You'll work across various repositories spanning React frontends and AWS serverless backends, owning the full delivery lifecycle from feature development through to production. Critically, we want someone who can help drive the technical strategy and continuous improvement of these applications, aligning with broader company engineering standards and platform direction.
** Key Responsibilities
*** Develop and maintain multi-step transfer journeys across transfer products
* Own the full stack;
React frontends, AWS Lambda BFF layers, and IaC
* Drive technical strategy for the transfers domain, proposing and delivering improvements that align with company-wide engineering direction
* Champion continuous improvement; identify tech debt, propose modernisation, and improve developer experience
* Contribute to architectural decisions around API design, infrastructure patterns, and cross-service integration
* Collaborate with platform/infrastructure teams to evolve integration patterns
* Support CI/CD pipelines and deployment processes across all environments (dev, staging, production)
* Mentor other engineers and contribute to team-wide engineering standards
** Required Skills & Experience
*** Backend / BFF
** Node.js (v20+) with Type Script
* AWS Lambda handler development (both SST and raw CDK patterns)
* API Gateway (REST/V1) — authorize rs, routing, gateway responses
* Middy middleware framework
* Integration patterns: cross-account STS Assume Role, Secrets Manager, Dynamo

DB, SNS
* RESTful API design and OpenAPI specifications
* AWS & Infrastructure
** AWS CDK and/or SST for infrastructure as code
* Core services:
Lambda, API Gateway, Dynamo

DB, VPC, IAM, KMS, Secrets Manager, SSM Parameter Store, SNS
* VPC networking — Lambda in VPC, security groups, egress configuration
* Lambda provisioned concurrency and auto-scaling
* Understanding of WAF and ingress routing patterns
* Testing
* * Vitest for unit and integration testing
* MSW (Mock Service Worker) for API mocking
* Testcontainers experience is a plus
* CI/CD & Dev Ops
** Git Lab CI pipelines; multi-stage, environment-specific deployments
* Automated security scanning (Snyk or similar SAST/DAST)
* Environment promotion strategies (dev → staging → production)
* General
* * Monorepo experience (pnpm work spaces, npm work spaces)
* Feature flagging (Launch Darkly or similar)
* OAuth/token-based authentication and authorisation flows
* Strong understanding of cross-account AWS patterns
** Desirable
* ** Frontend
* * React (v18+) with Type Script
* React Hook Form, Zod/schema-based validation
* Tan Stack Query (React Query) for server state management
* Vite build tooling
* Component library integration
* Accessibility-first development
* Playwright for end-to-end and snapshot testing
* Contract testing (Pact)
* Analytics integration (Adobe Analytics or similar)
* Other
* * Experience with SST v2 (Serverless Stack) specifically
* Familiarity with API gateway/ingress platforms
* Experience with Cognito for machine-to-machine auth
* Financial services domain experience
* Experience driving technical roadmaps and aligning them with broader organisational strategy
** What We're Looking For Beyond Technical Skills
*** Someone who proactively identifies opportunities for improvement rather than waiting to be told
* Ability to articulate technical trade-offs and influence direction at a team and…