Senior Software Engineer

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 Full Stack Engineer to help build and evolve the services that support our customers and business. Working primarily within AWS serverless environments, you'll design and deliver scalable backend services, APIs and platform capabilities, while contributing across the full stack where required. You'll play a key role in enhancing our customer data platform, helping to deliver reliable, secure and efficient solutions that enable customer information to be managed and maintained seamlessly across our systems. As part of a collaborative engineering team, you'll contribute to the adoption of modern cloud-native technologies, GraphQL architectures and AI-enabled development practices. What you'll be doing Design, develop and support scalable backend services and APIs. Build AWS serverless applications using modern engineering practices. Develop integrations with internal and external systems. Enhance platform capabilities for managing and maintaining customer data. Improve platform resilience, observability, performance and scalability. Contribute across the full stack, including React-based applications where required. Take ownership of features throughout the software development lifecycle, from design to production support. Participate in architecture discussions, code reviews and technical design sessions. Collaborate with Product, Platform and Engineering teams to deliver customer value. Promote engineering excellence through automation, continuous improvement and modern development practices. Leverage AI and agentic tooling to improve engineering productivity and software delivery. About you You'll be a proactive engineer who enjoys solving complex technical challenges and taking ownership of outcomes. You'll be comfortable working in cloud-native, distributed environments and have a passion for building high-quality, scalable software solutions. Essential skills and experience Node.js and TypeScript. AWS and serverless application development. REST API design and development. Event-driven architectures (SNS, SQS or similar). DynamoDB and JSON data processing. Infrastructure as Code (Terraform, CDK, SST or similar). CI/CD pipelines and modern software delivery practices. Experience building and integrating APIs. React and TypeScript experience. Strong communication and collaboration skills. Desirable skills GraphQL API design and implementation. GraphQL federation and schema design. Experience migrating from REST to GraphQL architectures. Typesense, Elasticsearch or Contentful. OAuth and authentication flows. LaunchDarkly or feature management platforms. Grafana and observability tooling. Cross-account AWS architectures. TanStack Query, Zustand, Vite, Tailwind CSS. Micro-frontend architectures. AI-assisted and agentic development workflows. Financial Services experience. Interview process This will be a 2-stage interview process including a technical task. Working Schedule Based in Bristol head office, BS2 0TR. This role is permanent, full time, 37.5 hours per week, Monday to Friday. We offer a hybrid flex working pattern with a minimum of 2 days in the office per week. Why 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. What's on offer? 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 w ellness c oach sessions Variety of travel to work schemes with bike storage and shower facilities Inhouse barista and deli serving subsidised coffee and sandwiches T wo paid volunteering days per year * dependant on role level ** only available to select during our annual benefits window, in November each year ​ Hargreaves Lansdown is an inclusive employer that values diversity in its workforce. We encourage applications from all individuals without regard to race, religion, gender, sexual orientation, national origin, disability or age. This role may also be available on a flexible working or part time basis – please ask the Recruitment & Onboarding team for more information. Please note, we are unable to provide employment sponsorship to candidates.