Overview
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.
What You\'ll Do
* 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.
* 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.
* Architect with intent: Contribute to and refine system architecture decisions to support modularity, reuse, performance, and long-term maintainability.
* 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.
* DevOps & CI/CD: Support cloud-native deployment pipelines, automated testing, and observability for everything we build.
* Champion software engineering excellence: Drive continuous improvement across software engineering culture, codebases, and development practices.
* Build purposeful, high-impact products that help solve real-world infrastructure, environmental, and societal challenges.
* Be part of a mission-driven AI Solutions team that blends experimentation with delivery.
* Grow your leadership capabilities while remaining hands-on in a modern tech stack.
* Work with smart, collaborative colleagues who value clarity, pragmatism, and ownership.
Additional Information
We are actively recruiting a diverse workforce that is reflective of the communities we serve. We recognise that differences in ability, skills and experience are a strength and encourage applications from people of all backgrounds.
UK Immigration: Mott MacDonald Ltd. are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is a consequence of changes to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates eligible for alternative immigration routes in the UK that do not require sponsorship as a Skilled Worker now or in future.
Agile working: At Mott MacDonald, we believe in flexible work arrangements and offer a hybrid policy to meet client, team, and personal commitments.
Equality, diversity, and inclusion: We place equality, diversity, and inclusion at the heart of our business, promoting fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression and are committed to an inclusive environment where everyone can contribute.
Accessibility: If you are disabled or need support to apply or attend an interview, please contact reasonable.adjustments@mottmac.com for assistance.
Benefits include:
* Health and wellbeing: Private medical insurance, health cash plan, access to Peppy for menopause support, comprehensive wellbeing program, and flexible benefits including family extensions.
* Financial wellbeing: Pension contributions matched 4.5% to 7%, life assurance up to 4x (option to 6x), income protection, flexible benefits, and potential annual bonuses.
Requirements
* Clear communicator with ability to engage and influence both technical and non-technical audiences.
* Experience in software engineering, focused on full-stack product development in cloud environments (Azure preferred).
* Proven success scaling production systems with global reach and multi-region deployment.
* Strong proficiency in React, TypeScript, Python, and database systems (SQL + NoSQL).
* Experience with monitoring and logging tools (CloudWatch, Sentry, DataDog) for stability and performance optimization.
* Experience managing or mentoring engineering teams, including cross-functional collaboration.
* Understanding of secure architecture, API design, and performance optimization.
* Experience with modern DevOps practices including CI/CD, containerization (Docker, Kubernetes), and infrastructure as code (Terraform).
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