Principal Platform Engineer
At a glance
Senior Platform & Infrastructure role at Neko Health. London · full-time · $405,000–$480,000 base.
devopsroles summary, based on the employer's posting.
What you'll do
- Set the architecture for an internal AI developer platform, then build and roll it out across engineering teams
- Create AI-agent and assisted-development workflows that engineers use in their everyday work
- Ship early platform components and improve developer speed, reliability and autonomy
- Expand the platform beyond pilot teams and establish clear ownership for agents, tools and supporting systems
What you bring
- You have built and launched an internal developer platform yourself, rather than advising others
- You have led agentic or AI-supported development that engineers adopted for regular use
- You bring deep backend experience with production systems, including recent Java or C# work strongly preferred
- You have introduced platform tools to at least twenty developers and achieved meaningful uptake
- You bring substantial platform ownership across at least ten years in engineering, plus expertise with a listed workflow engine
Who this fits
This is a hands-on technical leadership role for a senior engineer who can set long-term direction and deliver the platform directly. You'll need to build support through technical credibility and influence rather than formal authority. The role is based in London and is hybrid.
From the employer
Mission
Neko is redefining what prevention means, from treating illness when it arrives, to sustaining health before it's ever at risk. Our mission: make data-driven, preventative care accessible to more people, before symptoms appear.
In a single, non-invasive visit under an hour, proprietary technology and direct clinical care combine to deliver personalised, actionable insights. It's a team that thinks in 10x, not 10%. Every role here plays a part in building a world where prevention is the norm, and where your work genuinely helps people live longer, healthier lives.
The Role
This is a 0→1 build. You'll own the architecture, build and rollout of Neko's internal AI developer platform, shaping how our engineers design, ship and operate software through agentic, AI-assisted workflows.
It's a hands-on technical leadership role. You'll be the person setting long-term direction for AI agents, tooling and the systems underneath them, while also doing the work. The expectation is that what you build gets used across teams and meaningfully changes how engineering happens here.
What You'll Deliver
In the first 6 months
A clear architectural direction for the platform
Initial components shipped and adopted by early teams
Measurable improvements to developer speed, reliability and autonomy
Genuine organic adoption across engineering, driven by value not mandate
By month 12
A substantive shift toward agentic, engineer-led development workflows
Platform scaled beyond pilot groups to multiple teams
Clear ownership models for agents, tooling and supporting systems
Long-term architecture defined and moving toward maturity
What We're Looking For
Must-haves
Proven experience building and shipping an internal developer platform, hands-on, not advisory
A strong track record leading agentic or AI-assisted development work that engineers actually use day-to-day
Real backend engineering depth with production systems, recent Java or C# strongly preferred
Experience rolling out platform tooling to 20-30+ developers with meaningful adoption
Expertise with workflow engines such as AWS Step Functions, Azure Durable Functions, Temporal, Conductor or Dagster
The ability to drive change through influence and credibility, not positional authority
10-15+ years of engineering experience with substantial platform ownership
Nice to have
Full-stack exposure, though backend depth is the priority
Background in product-led SaaS or organisations with strong internal developer tooling culture
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Platform & Infrastructure$400k+
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