Principal Software Engineer / Principal AI Engineer

London Walllead

Software EngineerSoftware Engineering

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Quick Summary

Key Responsibilities

Own technical execution from discovery to production; build, assess, and harden prototypes and proofs of concept, and deliver new ones. Design and govern reusable agentic AI patterns (orchestration,

Requirements Summary

Own technical execution from discovery to production; build, assess, and harden prototypes and proofs of concept, and deliver new ones. Design and govern reusable agentic AI patterns (orchestration,

Technical Tools

Software EngineerSoftware Engineering

Embedded Innovation Teams are cross-functional squads embedded within our segments to rapidly turn internal AI experimentation into validated, reusable solutions, building the capabilities we need to deliver customer value and growth. We work problem-first rather than tool-first, directly inside segment and function teams, improving the internal workflows that help our people deliver better outcomes for customers, faster.

About the Role

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As a Principal AI Engineer/ Principal Software Engineer, you will be the technical lead for an embedded Innovation Squad, owning technical execution from discovery through to production. You will assess and harden existing AI prototypes, deliver new ones, and establish the agentic AI patterns, orchestration, tool use, memory, and retrieval that other squads reuse. You are the senior source of expertise on AI architecture, integration, and delivery.

You will work directly with internal stakeholders and end users in the host function, finalising requirements, making the architectural calls, and codifying validated solutions into reusable patterns, reference implementations, and starter kits. You may also provide sizing, infrastructure, and budget recommendations, and you will mentor and elevate the engineers around you.

Responsibilities

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Own technical execution from discovery to production; build, assess, and harden prototypes and proofs of concept, and deliver new ones.
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Design and govern reusable agentic AI patterns (orchestration, tool use, memory, retrieval).
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Ensure delivery meets architecture, security and data-governance standards; recommend infrastructure, hosting and data residency.
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Codify validated solutions into patterns, reference implementations, and starter kits so they can be picked up and scaled across other functions.
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Provide design input, finalise requirements, and work directly with internal stakeholders and end users in the host function.
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Write specifications, fix complex bugs, and design complex data models.
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Act as the primary technical contact for external resources and the squad's go-to on coding and AI.
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Establish baselines and report measurable outcomes for every initiative.
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Maintain visibility of in-flight AI pilots within the function to prevent duplication and surface candidates for reuse.
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Ensure alignment with enterprise non-negotiables: security, compliance and central technology infrastructure standards.
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Continuously evaluate emerging technologies and mentor and elevate team members.
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Take on related responsibilities as the squad's needs evolve.

We know that your well-being and happiness are key to a long and successful career. These are some of the benefits we are delighted to offer:

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Comprehensive Pension Plan
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Generous vacation entitlement and option for sabbatical leave
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Maternity, Paternity, Adoption, and Family Care leave
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Personal Choice budget
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Internal communities and networks
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Various employee discounts
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Recruitment introduction reward
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Employee Assistance Program (global)

Requirements

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What We Offer

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Join our team and contribute to a culture of innovation, collaboration, and excellence. If you are ready to advance your career and make a significant impact, we encourage you to apply.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

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