Senior Software Engineer – Full Stack Engineer (Node.js / GraphQL)

Location: Welcome Building

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

Full Stack Senior Software Engineer with a strong backend focus, working across TypeScript, Node.js, GraphQL and AWS serverless technologies. You'll help build and evolve the Discover platform, delivering scalable APIs, cloud-native services and customer journeys that support investment discovery, savings, search and account onboarding experiences.

We're expanding our Discover engineering team and are looking for a Full Stack Senior Software Engineer with a strong backend focus to help build and evolve one of our key customer discovery platforms.

You'll work primarily on AWS serverless backend services, APIs and platform capabilities, whilst also contributing to frontend applications when required. This is an opportunity to work with modern cloud-native technologies, GraphQL-based architectures, event-driven systems and customer-facing products that play a key role in our digital experience.

We're looking for engineers who enjoy solving complex technical problems, taking ownership of solutions and contributing to the continuous improvement of both technology and engineering practices.

You'll help build customer journeys that enable clients to discover investment opportunities, compare savings products, search across financial instruments and complete account opening and transfer journeys.

What You'll Be Doing

• Design, develop and maintain backend services powering the Discover platform.

• Build scalable APIs and integrations with internal and external systems.

• Develop AWS serverless applications using modern engineering practices.

• Contribute to platform scalability, resilience, observability and performance.

• Work across the full stack where required, collaborating closely with frontend engineers.

• Take ownership of features and issues from design through to production.

• Support CI/CD pipelines and deployment processes.

• Drive engineering improvements, automation and operational excellence.

• Participate in architecture discussions, code reviews and technical design sessions.

• Collaborate closely with Product, Platform and Engineering teams to deliver customer value.

What We're Looking For

• Strong ownership mentality.

• Ability to solve problems independently.

• Comfortable working within distributed systems and cloud-native environments.

• Strong communication and collaboration skills.

• Passion for building scalable cloud-native applications.

• Curiosity and willingness to learn across the full stack.

• A proactive approach to identifying technical improvements and opportunities for innovation.

Required Skills & Experience

Backend Engineering

• Node.js

• TypeScript

• REST API development

• API integrations

• AWS Lambda

• API Gateway

• Event-driven architectures

• Middleware frameworks such as Middy

• JSON data processing

GraphQL

We see GraphQL as an increasingly important part of our future architecture and would particularly welcome candidates with experience in:

• Designing and implementing GraphQL APIs

• GraphQL schema design

• GraphQL federation patterns

• Transitioning from REST-based architectures to GraphQL

• Consuming GraphQL services within distributed systems

Cloud & Infrastructure

• AWS

• Infrastructure as Code (Terraform, CDK, SST or similar)

• DynamoDB

• SNS / SQS

• Familiarity with core AWS services including IAM, Secrets Manager and Parameter Store

• Experience working with CI/CD pipelines and modern software delivery practices

Full Stack Experience

• Experience working across frontend and backend technologies

• React and TypeScript exposure

• Building customer-facing web applications

Desirable Skills

Search & Content Platforms

• Typesense

• Elasticsearch

• Contentful or other Headless CMS platforms

Modern Engineering Tooling

• LaunchDarkly or feature flagging platforms

• OAuth and authentication flows

• Cross-account AWS patterns

• Analytics integration

• Experience with observability tooling such as Grafana

Frontend Technologies

• TanStack Query

• Zustand

• Vite

• Micro-frontend architectures (e.g. Module Federation)

• Tailwind CSS

Nice to Have

• PHP

• Experience integrating with or supporting PHP-based applications and services

• Financial Services experience

You'll be comfortable taking ownership of features from design through to production, collaborating across engineering disciplines, and proactively identifying opportunities to improve both the platform and the way we work.

You'll contribute to the evolution of Discover by delivering reliable, scalable solutions, supporting a culture of engineering excellence, and helping to shape a platform that serves millions of customer interactions.

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?

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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.