Senior Software Engineer in London

As our Senior Software Engineer, you'll build and operate digital retail experiences that power LEGO®.com, the LEGO Insiders App, and associated commerce platforms. You'll work within a cross-functional product team to deliver customer-facing features and scalable backend services using JavaScript and TypeScript. This role combines hands‑on software development with technical leadership through mentoring, code reviews, and driving engineering excellence. You'll take ownership of complex technical challenges that span applications, services, and infrastructure.

Required Qualifications

• Delivered production‑grade applications using JavaScript and TypeScript
• Built solutions using React, Next.js, or cloud‑native microservices
• Implemented AWS, GraphQL, and CI/CD engineering practices in live environments
• Applied AI‑assisted development tools, such as GitHub Copilot or similar, to improve software delivery
• Led critical technical initiatives and coached engineers through code review practices
• Designed and operated large‑scale distributed systems with measurable improvements in performance, reliability, or scalability

Preferred Qualifications

• Developed advanced CSS solutions, accessibility features, and cross‑device optimisation
• Implemented event‑driven architectures and API platform capabilities

What you'll build

• Deliver significant features and enhancements across Shopper Technology products.
• Scale high‑traffic digital commerce experiences.
• Solve challenges that span frontend applications, APIs, microservices, and infrastructure.
• Improve performance, reliability, security, and developer productivity.
• Identify and resolve scalability and operational issues across production services.
• Contribute to engineering best practices and the adoption of AI‑assisted development.

If you've worked in a role where you delivered production‑grade JavaScript or TypeScript applications, built and supported GraphQL, REST, or microservice architectures, and implemented CI/CD pipelines or Infrastructure as Code solutions, you'll feel at home here. What matters most is a track record of improving software quality, operating large‑scale systems, and helping other engineers succeed.

Life on the team

You'll join Shopper Technology within Digital Product Engineering, the team responsible for customer‑facing digital commerce experiences at the LEGO Group. We build experiences that help customers discover, purchase, and engage with products across digital channels. You'll gain exposure to modern engineering practices, large‑scale commerce systems, and cross‑functional product development. We work in interdisciplinary product squads and collaborate closely with product and design partners. Our hybrid rhythm includes office collaboration three days each week. We value ownership across system boundaries, strong problem‑solving, continuous improvement, customer‑focused thinking, and collaboration across disciplines.

Success looks like

Success means becoming a trusted technical contributor who consistently delivers high‑quality software, strengthens engineering standards through mentoring, and takes ownership of production services. Over the next 12 to 18 months, the team will continue evolving LEGO.com and its digital commerce platforms, scale experiences globally, enhance engagement across web and mobile channels, and expand the use of AI‑assisted engineering and modern cloud practices. You'll work closely with Product Managers, Digital Designers, Software Engineers, Engineering Leaders, Platform and Infrastructure teams, Mobile and Web product teams, and Ecommerce and Retail teams.

What’s in it for you?

• Family Care Leave - We offer enhanced paid leave options for those important times.
• Insurances - All colleagues are covered by our life and disability insurance which provides protection and peace of mind.
• Wellbeing - We want our people to feel well and thrive. We offer resources and benefits to nurture physical and mental wellbeing along with opportunities to build community and inspire creativity.
• Colleague Discount - We know you'll love to build, so from day 1 you will qualify for our generous colleague discount.
• Bonus - We do our best work to succeed together. When goals are reached and if eligible, you'll be rewarded through our bonus scheme.
• Workplace - When you join the team you'll be assigned a primary workplace location i.e. one of our Offices, stores or factories. Our hybrid work policy means an average of 3 days per week in the office. The hiring team will discuss the policy and role eligibility with you during the recruitment process.

Children are our role models. Their curiosity, creativity and imagination inspire everything we do. We strive to create a diverse, dynamic and inclusive culture of play at the LEGO Group, where everyone feels safe, valued and they belong. The LEGO Group is highly committed to equal employment opportunity and equal pay and seeks to encourage applicants from all backgrounds (eg. sex, gender identity or expression, race/ethnicity, national origin, sexual orientation, disability, age and religion) to apply for roles in our team. The LEGO Group is fully committed to Children's Rights and Child Wellbeing across the globe. Candidates offered positions with high engagement with children are required to take part in Child Safeguarding Background Screening, as a condition of the offer. Thank you for sharing our global commitment to Children's Rights.

Just imagine building your dream career. Then make it real. Join the LEGO® team today. Our founder Ole Kirk Kristiansen made his first wooden toy in 1932. He persevered against the odds until his business was a success. Constantly innovating, never compromising. Building, rebuilding, and striving for the best. It is this resilience and permanent sense of renewal that drives us forward. We are never still. We will always be creating, inventing, and having fun. Build your career brick by brick and play your part in continuing our mission to "inspire and develop the builders of tomorrow".