Founding Senior Platform Engineer

Magentic; Greater London; Hybrid; GBP 120,000 - 140,000; Full time

Job summary

A forward-thinking tech company in Greater London is seeking an experienced Platform Engineer to design and build cloud-native infrastructure supporting an AI procurement solution. The role involves shaping a multi-cloud platform, ensuring security and rapid software delivery. Candidates should have deep cloud expertise, particularly in Azure or AWS, and experience with containers. The position offers a salary of £120,000-£140,000 and attractive benefits including hybrid working arrangements.

Benefits

Competitive Equity

In-office lunches provided

Visa sponsorship

Salary sacrifice pension and nursery schemes

Annual team retreat

Qualifications

• Deep experience with cloud platforms, preferably Azure or AWS.
• Strong background in containerization and orchestration technologies.
• Ability to deliver production-ready solutions rapidly.

Responsibilities

• Design and build cloud-native infrastructure for AI.
• Shape platform following IaC and GitOps practices.
• Work with development team on secure software delivery.

Skills

Cloud mastery of Azure and/or AWS

Experience with containers and orchestration

Experience managing production clusters

Ability to sketch architecture quickly

Clear communication with stakeholders

Job description

Overview

This job is brought to you by Jobs/Redefined, the UK's leading over-50s age inclusive jobs board.

We're looking for the second member of our Platform Engineering team to build, scale and own the infrastructure that powers Magentic's AI procurement solution. We have a very ambitious product vision, but we're early in our building journey and are looking for an experienced Platform Engineer to build a best in class infrastructure from the ground up. This is a rare opportunity to join early enough to help build a high-quality rocket ship, rather than rebuild it in flight.

We're pushing the boundaries of AI with next-generation agentic systems that can manage entire procurement workflows. Our mission is to make global manufacturing supply chains robust to an ever-changing world - that's a $3tn market opportunity.

If that's not exciting enough - we're backed by world-class investors including Sequoia Capital, and you'd be working along a super talented team which brings together expertise from OpenAI, Meta, Revolut, NASA and McKinsey (and that's just the first 11 people!).

What Youor Do

• Design, build and own the cloud-native backbone that powers our AI agent workers at scale.
• Shape a multi-tenant, multi-cloud platform (we deploy where our customers are) following IaC and GitOps best practices, while balancing speed, cost and security.
• Work with the development team to design processes for secure software delivery (GitHub workflows, AI agent tooling for reviews, security and compliance).
• Make our systems, both AI and non-AI, highly observable.
• Champion security, compliance and automation to turn them into an advantage, instead of friction.

You Might Be a Great Fit if You

• Have deep cloud mastery of Azure and/or AWS.
• Strong experience with containers and orchestration.
• Are an enthusiastic student/hobbyist of AI able to leverage agent-assisted development.
• Have managed production clusters at scale with IaC in security-certified companies.
• Have experience working with development teams to make their lives easier.
• Can take a loosely defined problem, sketch an architecture, and deliver a production-ready solution in days or weeks, not months.
• Have the experience to know what is needed now and what can come later.
• Can communicate clearly with both engineers and business stakeholders.

Bonus Points

• Experience designing self-hosted, cloud agnostic, AI/ML infrastructure.
• Infrastructure/platform experience in B2B settings, e.g.: Identity Federation.

Compensation and Benefits

At Magentic, we recognise and reward the talent that drives our success. We offer:

• Competitive Equity: play a real part in Magentic's upside
• A salary of £120,000-£140,000
• Visa sponsorship
• In-office lunches provided
• Salary sacrifice pension and nursery schemes
• Hybrid London HQ (3-4 days in the office/customer site)
• Annual team retreat-a fully-funded off-site to recharge, bond, and build

Our Interview Process

There are a quite a few components because it's really important that both we and you have all the information to make a great decision at this stage of our journey. We can move quickly through these stages, so let us know if you have any timelines we need to meet.

1. Initial call (30 mins): this first step is an opportunity for you to hear more about Magentic and the role, and for us to learn more about your how your experience aligns with the role.
2. Design interview with the CTO or Founding Engineer (45-60 mins): in this step, we present you with real problems Magentic encounters, and we ask you to design a solution in a whiteboarding exercise.
3. Take home task (2-3 hours): we'll give you an exercise to demonstrate the key skills for the role.
4. In-person interview: for the final step, we invite you to come meet the team in-person and work alongside us! We find this is the best way for candidates to get a sense of what working at Magentic is like. This day will include a culture interview, some live coding work and a discussion of your work with the team.
5. CEO interview (30 mins): a chance for you to meet Robin, hear about his vision for the company - this may happen at the in-person, dependent on scheduling constraints

Responsible AI Statement

At Magentic, we are committed to developing artificial intelligence that benefits humanity. We push the limits of AI's capabilities and are dedicated to its responsible and safe deployment. Recognising the profound impact of AI, we ensure that its development is centred around human needs and safety, incorporating a wide array of perspectives to fulfil our mission.

Equal Opportunities and Accommodations Statement

Magentic is committed to creating a diverse and inclusive workplace and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, gender, gender reassignment, marital or civil partnership status, age, disability, pregnancy or maternity, or any other basis as protected by the Equality Act 2010.

We actively encourage applications from candidates of all backgrounds and cultures and believe a diverse workforce enhances our ability to deliver innovative solutions. We also ensure that our employment decisions are based solely on individual qualifications, merit, and business needs.

Magentic is dedicated to providing reasonable accommodations to job applicants with disabilities. If you require any adjustments during the recruitment process, please indicate this in your application or contact us directly.