Lead AI Engineer / Lead Full-Stack AI Engineer

Lead AI Engineer / Lead Full-Stack AI DEVELOPER

Hybrid (In Central London every Tuesday) | Permanent | Salary £100-120k DOE + Benefits

About Magnus Consulting

At Magnus Consulting, we help ambitious B2B organisations unlock sustainable, customer-first growth through marketing effectiveness. We work across technology, financial services, SaaS, professional services, and PE-backed scale-ups to build commercial engines that perform.

Our work spans brand transformation, marketing strategy, go-to-market optimisation, and post-M&A commercial integration. What sets us apart is our combination of sharp insight, rigorous analysis, and pragmatic strategies that drive real commercial outcomes.

We are proud to be:

A certified B Corp, committed to driving positive impact
Listed in the FT’s top UK management consultancies 2025 for Marketing, Brand & Pricing
Trusted by our clients, with a consistently outstanding NPS of 95, reflecting the impact and quality of our work
A consultancy built on momentum, ambition, and a belief in excellence

Our Core Values

Courageous Curiosity – We ask bold questions, explore new ideas, and push the boundaries of what AI can do

Momentum that Matters – We move fast and with purpose, turning complex challenges into practical, scalable solutions

Impact with Integrity – We build technology that delivers measurable value while staying transparent, ethical, and human-centered

Shared Success – We work as one team – engineers, consultants, and strategists – collaborating to deliver meaningful outcomes.

The Role

We’re hiring a Lead AI Engineer / Lead Full-Stack AI Developer to work as the right-hand to our Head of AI Strategy, leading a small, high-performing team and scaling our new AI platform (Magnitude and our next generation of AI products).

This is a hands-on technical and leadership role. You’ll drive the roadmap, set the bar for engineering quality, own testing & reliability across frontend and backend, and help design new AI tools and commercial features. You’ll work closely with internal stakeholders and confidently represent the technology in front of clients.

This is an opportunity to step into a growth-stage product at a pivotal moment, shaping its architecture, standards, and trajectory as it scales to a broad user base.

Lead the Evolution of Magnitude

Own technical direction and delivery across the platform, from backend services to frontend interfaces.
Develop and maintain a high-quality, robust, multi-tenant architecture.
Oversee structured outputs, integrations with LLMs, knowledge retrieval, and intelligent workflows.

Set Standards for Engineering Excellence

Establish and enforce rigorous testing, quality gates, and CI/CD practices.
Ensure reliability, security, access controls, and auditability across the full stack.
Own code quality, documentation, and architectural consistency.

Manage & Develop a High-Performing Team

Lead a small team of AI engineers (full and part-time) and customer success manager.
Mentor and coach team members, fostering clarity, pace, and technical excellence.
Support hiring, onboarding, and capability development as the team scales.

Full-Stack Delivery (Hands-On)

Ship production-grade features across:
Backend: Node.js, Python, APIs, data models, vector search, multi-tenant logic
Frontend: React/Next.js UI components, dashboards, interfaces
AI Layer: LLM integrations, RAG pipelines, model orchestration

Product Innovation & Roadmap Ownership

Work with the Head of Strategy to plan, prioritise, and refine the product roadmap.
Prototype and validate new AI tools and features in collaboration with strategists and consultants.
Evaluate emerging AI capabilities and shape how they’re applied inside Magnus.

Client-Facing & Cross-Functional Collaboration

Translate complex technical concepts into clear, commercial talking points.
Join client conversations to explain platform capabilities, AI approaches, and solution design.
Work with consultants to turn business problems into robust, scalable technical solutions.

What We’re Looking For

Technical Depth

5+ years in software engineering, full-stack development, or AI engineering.
Strong experience across TypeScript, Node.js, React/Next.js, Python, and cloud environments.
Deep understanding of AI integration patterns (LLM APIs, RAG/vector search, structured outputs).
Proven experience architecting reliable, scalable systems (multi-tenant preferred).
Rigorous approach to testing, automation, observability, and engineering quality.

Leadership & Delivery

Experience leading or managing engineers or cross-functional teams.
Ability to set technical direction and uphold high engineering standards.
Comfortable operating autonomously, making decisions, and owning outcomes.

Product & Commercial Mindset

Able to align technical decisions with business goals.
Skilled at balancing speed with long-term maintainability.
Curious, pragmatic, and motivated by building tools that solve real problems.

Communication & Client Presence

Confident presenting to clients and internal stakeholders.
Clear communicator who can explain AI concepts simply and credibly.
Comfortable shaping conversations, bringing structure, and building trust.

Why this role is exciting

You’ll influence the architecture, quality, and trajectory of a platform that is about to scale rapidly.
You’ll work directly with senior leaders to shape Magnus’ AI strategy and product roadmap.
You’ll be part of a talented, values-driven team with big ambitions for AI in professional services and other key sectors
You’ll have space to innovate, building tools that change how consultants and clients work.
You’ll grow into a pivotal role as the team, platform, and product ecosystem expand.

What we offer

Permanent, full-time role with clear progression through our AI career framework.
Our benefits include private healthcare, a pension scheme, enhanced holiday entitlement, and a range of wellbeing and professional development perks.
Hybrid working model – mostly remote apart from in-person collaboration in our London office (Tuesdays plus additional days as needed for team or client work).
High-impact, insight-led work supporting marketing and commercial transformation for mid-market B2B clients (tech, SaaS, FS, PE and professional services).
Structured onboarding to set you up for success, followed by ongoing mentoring, learning pathways, and skills development.
Fast-paced, supportive environment where quality, curiosity, collaboration, and momentum are core to how we deliver.