Principal AI Engineer - Fullstack; m​/f​/d

Principal AI Engineer – Fullstack A leading enterprise organisation is expanding its AI and digital engineering capabilities to deliver scalable, intelligent, and secure solutions across the business. The organisation is seeking a Principal AI Engineer – Fullstack to design, build, and lead the development of end-to-end AI‑driven applications, combining advanced machine learning with robust fullstack engineering practices.

• Architect, design, and build fullstack AI‑powered applications from concept through production.
• Lead the development and deployment of machine learning and generative AI models into real‑world systems.
• Design scalable back-end services and APIs to support AI workloads and data pipelines.
• Develop responsive, user‑focused front‑end experiences that integrate AI‑driven capabilities.
• Embed best practices for security, performance, scalability, and maintainability across the stack.
• Champion engineering excellence through code reviews, technical standards, and architectural governance.
• Collaborate closely with data scientists, product managers, and platform teams to translate business needs into technical solutions.
• Proactively identify technical risks and improvement opportunities, driving innovation and continuous optimisation.
• Act as a technical leader and mentor, supporting the growth and capability of engineering teams.

• Strong experience building fullstack applications using modern front‑end and back‑end technologies.
• Hands‑on expertise in AI/ML development, including model training, deployment and lifecycle management.
• Experience with cloud‑based architectures and services supporting AI and data‑intensive workloads.
• Solid understanding of data engineering, APIs and system integration patterns.
• Proven ability to design scalable, secure and high‑performance production systems.
• Strong accountability for technical quality, reliability and delivery outcomes.
• Excellent collaboration and communication skills, with the ability to engage senior stakeholders.
• Continuous improvement mindset with a passion for innovation and emerging AI technologies.

At Halian, we recognise that diversity, equity and inclusion (DEI) are essential to building high‑performing teams for our clients. We are committed to connecting organisations with top talent from all backgrounds, ensuring that every individual feels valued, respected and empowered to contribute their unique perspectives. We encourage applications from all qualified candidates, regardless of race, gender, disability or any other characteristic that makes them unique.

By fostering diverse and inclusive workplaces, we help our clients drive innovation, enhance collaboration and better reflect the communities we serve.