Principal Full Stack Engineer

Description

We’re seeking a Principal Full Stack Engineer to lead the design, development, and scaling of AI-powered digital products that serve infrastructure, engineering, and consulting professionals around the globe. This is a hands-on leadership role that blends deep technical skills with strategic thinking. You’ll balance the role of individual contributor while providing technical direction and mentoring a small cross-functional team of engineers and data scientists, helping ensure excellence and strong delivery outcomes.

• Build scalable products: Design, build and maintain robust, secure full-stack applications that integrate AI/ML models and serve our external clients and internal users across Mott MacDonald at global scale.
• Work across disciplines: Collaborate closely with data scientists and ML engineers to integrate models into production-grade products, and with product managers to shape roadmaps based on technical feasibility and user value.
• Champion software engineering excellence: Drive continuous improvement across software engineering culture, codebases, and development practices.
• Lead delivery: Take end-to-end technical ownership of digital product initiatives—from architecture and development through deployment, monitoring, and iteration.
• Mentor and manage: Support the growth and effectiveness of a small team of engineers and data scientists, promoting best practices in code quality, testing, and collaboration.
• DevOps&CI/CD: Support cloud-native deployment pipelines, automated testing, and observability for everything we build.
• Build purposeful, high-impact products that help solve real-world infrastructure, environmental, and societal challenges.
• Architect with intent: Contribute to and refine system architecture decisions to support modularity, reuse, performance, and long-term maintainability.

Requirements

• Experience in software engineering, with a focus on full-stack product development in cloud environments (Azure preferred).
• Understanding of secure architecture, API design, and performance optimisation.
• Strong proficiency and current experience in React, Typescript, Python and database systems (SQL + NoSQL).
• Experience managing or mentoring engineering teams, including cross-functional collaboration.
• Clear communicator, with the ability to engage and influence both technical and non-technical audiences.
• Experience with modern DevOps practices including CI/CD, containerisation (Docker, Kubernetes), and infrastructure as code (Terraform).
• Experience with performance monitoring and logging tools, including CloudWatch, Sentry, or DataDog, to ensure application stability, performance optimisation, and effective issue resolution
• Demonstrated success building and scaling production systems with global reach and multi-region deployment.

Benefits

• Work with smart, collaborative colleagues who value clarity, pragmatism, and ownership.

Training + Development

Interview process

Visa Sponsorship

Security clearance