Senior Software Engineer - Backend in London

Sensat is a geospatial AI business that powers advanced and highly functional digital twins for the world's most critical infrastructure projects. We partner with the world's largest construction, engineering and critical infrastructure companies, including National Grid, Network Rail, Heathrow and Severn Trent Water. We enable our customers to fight the costly and high-risk "Status Quo" of siloed data, people and processes. Our AI-powered digital twins help teams digitally visualise, plan and manage projects, providing Project Confidence Through Clarity.

We are a high trust, high impact team, who offer purpose driven work. We operate with autonomy and flexibility in an agile, flat structure. We look for highly talented, adaptable and curious individuals who love solving meaningful problems and who share our resilient team spirit when facing challenges! We are on track to more than double ARR in 2025, with a strong pipeline that positions us for another year of 100%+ ARR growth in 2026. Backed by over £25 million in funding from blue-chip investors like National Grid Partners and with imminent US market entry representing a significant value inflection point, this is an exciting time to join the Sensat team!

Data is at the core of our digital twin platform, bringing together vast, messy, multi-format project information and turning it into something that makes immediate sense. You’ll be part of a team of innovators helping organisations see risks earlier, coordinate better, and make decisions with confidence. We’re looking for someone to drive forward how we serve large geospatial data sets on cloud platforms and make complex collaboration needs effortless for our users. This is a high-trust, high-impact role. Sensat engineers solve problems rather than solely implement solutions. You’ll define the direction of our knowledge model, contribute across the platform to ensure our customers have a well rounded experience, and help the team continuously raise the bar. If you’re after autonomy, developing novel solutions, and delivering real-world value, you’ll thrive here.

What you’ll do:

• Design and build the underlying model that makes 2D/3D/4D spatial data actionable — be that handling relational, graph, vector, or geospatial information.
• Provide an API to process and interact with our data.
• Work to integrate with key ecosystem partners.
• Set up and maintain cloud infrastructure to support the deployment of these services.
• Contribute to and improve the standards for software engineering, such as code quality, automated testing, documentation / knowledge sharing, and broader team processes.
• Contribute to maintaining the reliability of Sensat’s enterprise platform.

What you'll bring:

• You’ll have significant experience with data-oriented web applications.
• Deep understanding of data modeling with proven expertise in a relational DB (e.g. PostgreSQL): Schema design and migrations, Indexing strategies and query optimisation, Transaction management.
• Strong expertise in Go for building scalable production systems, including the use of Protocol Buffers for defining service contracts.
• Experience with AWS (ECS/Fargate, S3, Cloudfront) or other leading cloud vendor to design cost-efficient, reliable infrastructure.
• You have a keen eye for detail, promote high standards, and have strong opinions but strike the right level of pragmatism.
• You have the conviction to drive changes you believe in while staying grounded in team outcomes, working autonomously but openly and pitching in wherever the work is needed.
• You’ve actively mentored others on technical and operational matters, raising the bar and ensuring sustainable ways of working.
• 5+ years commercial development experience, demonstrating your ability to build, test, and ship reliable code.

Bonus Points For:

• Side-projects or participation in open source projects in a related field.
• Prior work in geospatial, web mapping or construction industries.
• Hands-on experience with modern front-end web frameworks, such as Angular 17+.

What we’ll bring:

• Take a break using your 30 days of annual leave (in addition to bank holidays).
• A flexible working environment.
• Continue learning every day through your £500 personal development fund.