Senior Full-Stack Engineer - Transfers Client Journeys

We're looking for a Full-Stack Engineer to develop and maintain our suite of transfer applications. You'll work across three repositories spanning React frontends and AWS serverless backends, contributing to feature delivery, bug fixes, and operational support across the full stack. We want someone who takes ownership of their work, shows initiative in solving problems, and can operate with autonomy once given direction.,

• Build and maintain features across transfer journeys
• Work across the full stack - React frontends, AWS Lambda BFF layers, and
infrastructure as code
• Take ownership of issues end-to-end, from investigation through to production
deployment
• Proactively identify and raise technical debt, bugs, and improvement opportunities
• Support and improve CI/CD pipelines and deployment processes
• Write well-tested, maintainable code with good coverage
• Collaborate with the wider team, platform teams, and product owners to deliver against requirements
• Participate in code reviews and contribute to team engineering standards
  
  Backend / BFF
• Node.js with TypeScript
• AWS Lambda handler development
• API Gateway - routing, authorizers, request/response handling
• Middleware patterns for Lambda handlers (e.g. Middy)
• Working with DynamoDB, Secrets Manager, and SSM Parameter Store Confidential
• RESTful API design
AWS & Infrastructure
• AWS CDK or SST for infrastructure as code
• Familiarity with core AWS services: Lambda, API Gateway, DynamoDB, IAM, VPC, SNS
• Basic understanding of VPC networking - Lambda in VPC, security groups
• Comfortable reading and modifying existing IaC stacks
Testing
• Unit and integration testing with Vitest or similar
• API mocking with MSW or equivalent
• A test-first or test-aware mindset
CI/CD & DevOps
• Experience with CI/CD pipelines (GitLab CI or similar)
• Comfortable deploying to multiple environments and debugging deployment issues
General
• Working in monorepo setups
• OAuth/token-based authentication flows
• Comfortable using Git in a team environment (branching strategies, merge requests, code reviews)
Desirable Frontend
• React with TypeScript
• React Hook Form, Zod/schema-based validation
• TanStack Query (React Query)
• Vite build tooling
• Playwright for end-to-end testing
• Accessibility awareness
Other
• Experience with SST v2 (Serverless Stack)
• Feature flagging (LaunchDarkly or similar)
• Cross-account AWS patterns (STS AssumeRole)
• Contract testing (Pact)
• Financial services domain experience
• Code quality tooling
Confidential What Success Looks Like
• Someone who takes ownership - when they pick up an issue, they see it through to completion
• Initiative to investigate and resolve problems without needing to be hand-held
• Comfortable asking questions and raising blockers early rather than getting stuck silently
• Willingness to work across unfamiliar parts of the codebase and learn on the job
• Good communication skills - able to explain what they're working on and flag risks to the team
• A growth mindset - keen to develop their skills across backend, infrastructure, and frontend
  
  We're building the next generation platform for one of the UK's largest financial services companies, trusted by over 2 million clients and managing c.£150 billion in assets. You will contribute in expanding our new capabilities that will enable our clients to seamlessly transfer in (and out) financial products like SIPPs and ISAs.
Be part of HL's future. Be part of the future of investing. Shape it with us, Here at HL, we're the UK's number 1 investment platform for private investors, based in Bristol. For more than 40 years we've helped investors save time, tax and money on their investments. To achieve our mission, we believe we have a workplace like no other, with constant learning, dynamic teams, and a great ethos. We're steered by core values that promote service, quality, innovation, and opportunity in everything we do.


• 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 outpatient care
• Health screening programme
• Help@hand - confidential support including mental health counselling and remote GP
• Wellhub - unlimited access to fitness providers 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