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Principal Software Engineer
Why Faculty?
We established Faculty in 2014 because we believed AI would be the most transformative technology of our time. Since then, we’ve collaborated with 350+ global customers to drive human-centric AI across industries—government, finance, retail, energy, life sciences, and defence. We don’t chase fleeting trends; we build responsible, impactful AI that delivers measurable results.
Our reputation is growing, and we’re always looking for individuals who share our passion for intellectual curiosity and building a positive legacy through technology. Join us to explore the full potential of AI and see it translate into real-world solutions.
About the Team
Our Defence team specialises in designing and embedding human-centred AI solutions that give our nation a strategic edge. We partner with clients to deliver ethical, reliable, and cutting-edge AI in high-stakes environments, ensuring national security and global stability.
Security clearance is a requirement for this role. You’ll need to be eligible for UK Security Clearance (SC) and willing to work 2–4 days per week on-site, including travel across the UK. Otherwise, you can enjoy flexible location options, working from our London office, hybrid, or remotely.
About the Role
As a Lead Software Engineer, you’ll lead the design and delivery of backend and edge/IoT systems for Defence projects, ensuring scalable, future-proof architecture. You’ll be the technical visionary—bridging proof-of-concept to production-ready systems—while mentoring engineers and collaborating with Machine Learning Engineers and Data Scientists.
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Key focus areas:
- Leading and mentoring an engineering squad to deliver high-quality software.
- Build complex backend and edge/IoT components for client projects.
- Implement robust CI/CD pipelines, Docker, and Kubernetes strategies.
- Develop production-grade code using Python, Rust, C++, or Go.
- Integrate AI/ML capabilities into software architectures.
- Break down complex technical concepts for stakeholders (both technical and non-technical).
What You'll Be Doing
- Leading & mentoring a specialised engineering team for high-impact delivery.
- Designing and engineering critical components across backend and edge/IoT domains.
- Automating pipelines using GitLab CI/CD, leveraging Kubernetes and Docker.
- Shipping production-ready code in Python and compiled languages.
- Collaborating with ML and data teams to embed AI into real-world systems.
- Translating technical architecture into actionable communication for all levels.
Who We're Looking For
You’ll bring:
- Senior experience in application development and modern software architecture.
- Proficiency in Python and at least one compiled language (Rust, C++, Go, etc.).
- A raw engineering leadership mindset—empowering teams and driving technical excellence.
- Hands-on DevOps experience, including GitLab CI/CD pipelines, Kubernetes, and bare-metal deployments.
- A knack for clear and persuasive communication with engineers, clients, and executives.
- A passion for ambitious, real-world problem-solving—preferably in AI, defence, or high-impact systems.
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The Interview Process
- Talent Team Screen (30 minutes)
- Introduction to the Role (45 minutes)
- Pair Programming Interview (90 minutes)
- System Design Interview (90 minutes)
- Commercial & Leadership Interview (60 minutes)
Our Recruitment Ethos
We don’t just want a team of like minds—we seek diversity in thought, knowing it fuels innovation and drives better outcomes. Our principles are rooted in:
- Seeking truth through varied perspectives.
- Using differences to create stronger, more impactful work.
- Encouraging applications from all backgrounds.
We are proudly inclusive—committed to hiring the best, regardless of ethnicity, gender, religion, or sexual orientation.
Our Benefits
Join a progressive company that values its team with:
- Unlimited Annual Leave Policy
- Private healthcare & dental
- Enhanced parental leave & family-friendly flexibility
- Sanctus Coaching (personal & professional development support)
- Hybrid working options for maximum flexibility.
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Jessica, London
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