Principal Engineer

At Beams, we’re transforming home renovation – making it simpler for homeowners and greener for the planet. We believe that renovating a home should be just as special as living in one. The process should be easy and exciting, not overwhelming. But today, home renovation is often complex, stressful, and full of uncertainty. That’s why we’re rethinking it from the ground up – using technology to match homeowners with the right plan, the right design, and the right people to deliver high-quality, energy-efficient renovations. Since launching in 2022, we’ve built an end-to-end service that guides homeowners through every step of the renovation journey, from planning to design to build. And because we believe the green choice should always be the easy choice, we’re helping people create more energy-efficient homes for a better future for all. At Beams, we move fast, challenge the status quo, and tackle big problems with bold ideas. We value action, simplicity, and positive energy, fostering a culture of openness and always doing the right thing—for homeowners, for builders, and for the planet. If you’re excited by the opportunity to reshape an industry and make a real impact, we’d love to hear from you.

About the role

We’re solving high-impact, real-world challenges. Our roadmap includes:

• Building scalable, performant and engaging mobile-first web applications for our customers, our builder network and our internal team.
• Developing agentic AI driven process automation to drive scale, improve sales conversion, reduce human error & costly delays and bring innovative experiences to our customers.
• Providing secure payments to prevent fraud: financial transactions are core to every renovation so they must be transparent and secure, giving homeowners confidence and ensuring builders are paid fairly.
• Optimising supply chains and scheduling, simplifying procurement and cutting unnecessary transport emissions by ensuring the right materials arrive at the right time.

To achieve this, and more, we develop scalable and resilient systems, using a modern tech stack that includes:

• Cloud-native and distributed systems development in AWS.
• Microservices and event-driven architectures in Typescript and Python.
• CI/CD, Infrastructure as Code and a strong testing culture.

As our Principal Engineer, you will play a crucial role in the design and development of this platform, taking ownership of engineering architecture and driving initiatives that have a lasting impact on our product and company. Your influence will extend across teams, requiring both strategic insight and hands-on engineering expertise. You’ll also be a mentor and a coach, nurturing your teammates and fostering a culture of inclusion, excellence, learning and collaboration. You’ll work closely with our CTO and our Head of Product to refine our processes, enhance developer tooling, and create a path for continuous personal and professional growth within the team.

Who we are looking for

We are looking for a Principal Engineer who thrives in high-growth environments, loves solving complex technical challenges, and wants to help shape the future of engineering at Beams. You bring expertise in designing and scaling distributed systems, alongside a strong product mindset that balances technical excellence with business impact. We value candidates who:

• Have experience architecting and scaling high-performance systems, writing clean, well-tested code, and focusing on reliability and maintainability.
• Are strategic thinkers, working closely with the CTO to develop technical strategies and best practices that elevate the engineering team.
• Take charge of high-impact projects that span teams, lead design reviews, and foster a culture of collaboration and technical excellence.
• Work cross-functionally with product, design, and business teams to align engineering decisions with company goals.
• Excel in optimising system performance, security, and resilience at scale.
• Have experience with CI/CD pipelines, cloud infrastructure (AWS, GCP, or similar), and scalable DevOps practices.
• Have a passion for operationalising AI and integrating AI-driven tools into production systems.

If you don’t meet every qualification listed, don’t worry! At Beams, we value passion and potential over a perfect checklist. If you're excited about making home renovation simpler, greener, and more accessible, we strongly encourage you to apply. We believe that diversity of thought, experience, and background strengthens our team and we’re committed to fostering an inclusive environment where everyone can thrive.

Package and Benefits

• Competitive salary and share options giving you a stake in the company’s success.
• 25 days annual leave plus bank holidays.
• Opportunities for professional growth to deepen your technical mastery, develop leadership skills and increase strategic impact.
• Budget for learning & development to support your growth.
• Hybrid working: This is a full-time position with a flexible balance of days at our London office and home days.

If you're passionate about making renovation simpler and greener and share our commitment to making a positive impact, we encourage you to apply for a role with us, even if you're not sure you're a perfect match. We look forward to hearing from you and discussing how you can contribute to our team.

At Beams, we're committed to fostering a diverse and inclusive workplace where everyone is treated with respect and dignity. We believe diversity of thought, background, and experience drives innovation and success. We're dedicated to building a team that represents a variety of perspectives and experiences, and we actively encourage applications from underrepresented groups. We're an equal opportunities employer, all applicants will receive consideration for employment without discrimination on the basis of race, colour, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, or any other characteristic protected by law.