Senior Software Engineer - Full-Stack (React)

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 are building a next-generation platform for one of the UK's leading financial services providers — trusted by over 2 million clients and managing approximately £150 billion in assets. This is a unique opportunity to help shape technology that changes how people invest and achieve financial freedom. We are looking for a Senior Software Engineer to join our Dealing Journeys squad, delivering critical capabilities at the heart of the investment experience. You will join our Trading Tribe — a domain responsible for end-to-end investment journeys, from pre-trade decision-making and order placement through to trade execution, delivering fast, reliable and seamless investing experiences at scale. In this role, you will design and build modern software solutions using technologies such as React, React Native and AWS, contributing to distributed, highly available platforms serving millions of clients. As a senior engineer, you will help drive technical excellence, champion ownership and continuous improvement, and collaborate closely with engineers, product managers and stakeholders to solve complex business and technical challenges. By joining us, you will help deliver innovative, scalable solutions that make investing simpler, faster and more accessible for millions of investors across the UK. Be part of HL's future. Be part of the future of investing. Shape it with us. What you'll do Design, build and maintain high-quality software across web, mobile and backend services, adhering to team, security and regulatory standards Review code and provide constructive feedback to maintain engineering excellence and consistency across the codebase Collaborate closely with engineers, product managers and designers to deliver significant new capabilities for our clients Develop and enhance customer-facing experiences using React and React Native, while contributing to the APIs and services that power them Support and improve existing applications, ensuring they remain reliable, secure, performant and maintainable Design and implement scalable, cloud-native solutions running on AWS Develop automated tests and contribute to quality engineering practices throughout the software lifecycle Maintain awareness of modern security and secure coding practices, ensuring solutions meet industry and regulatory standards Document solutions and architectural decisions to agreed team standards Champion continuous improvement in engineering practices, tooling and developer experience Build strong working relationships across the squad and wider engineering organisation Actively participate in communities of practice, technical discussions and knowledge-sharing initiatives Continuously develop both technical and interpersonal skills while helping others do the same What you bring 5+ years of professional experience building modern applications with TypeScript and React Strong understanding of modern frontend architecture, including large-scale application decomposition, state management, separation of concerns and performance optimisation Solid knowledge of HTML, CSS and JavaScript/TypeScript Experience designing and consuming REST APIs and/or GraphQL services Experience contributing to backend services and APIs, with an understanding of distributed systems and microservice architectures Experience building and operating applications in AWS Strong understanding of software design patterns, testing strategies and engineering best practices Experience building and maintaining CI/CD pipelines Experience delivering accessible applications, including WCAG compliance and keyboard navigation support Strong focus on writing secure, maintainable and well-tested code Collaborative and communicative, with the ability to work effectively within cross-functional teams Solution-oriented and pragmatic, balancing technical excellence with business outcomes A continuous improvement mindset and a passion for learning new technologies and approaches Comfortable working in Agile environments and contributing to technical and architectural discussions Nice to have Experience developing mobile applications with React Native Hands-on experience with Docker, Kubernetes and cloud-native development practices Experience working with PHP applications and services Experience developing applications using Java What Success Looks Like You'll take ownership of complex features from concept to production, collaborate effectively across disciplines, and help deliver reliable, scalable and intuitive investment experiences while raising engineering standards across the team. 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 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 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. Hargreaves Lansdown is the UK's number one platform for private investors. Our purpose is to empower people to save and invest with confidence, and today, we are trusted with more than £120 billion by over 1.7 million clients. We are based in the heart of Bristol now with over 2,000 colleagues. We believe we have a workplace like no other, with constant learning, dynamic teams and a great ethos. We're steered by our core values that promote service, quality, innovation, and opportunity in everything we do. For more information about careers at HL and to see all our vacancies, please visit our careers website.