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About the Role

As a Senior Platform Engineer, you will be a driving force behind the evolution of Semble's engineering platform and the day-to-day experience of every engineer who builds on top of it. You will champion infrastructure best practices, shape team goals, and influence the wider engineering roadmap. You will obsess over friction: the small (and large) things that slow engineers down, and how to remove them through better tooling, clearer paths, and stronger enablement. This is a senior, high-trust role where you will be expected to make sound architectural judgment calls, mentor other engineers, and represent the Platform team's priorities in cross-functional conversations, all while keeping empathy for the end-user (your fellow engineers) at the centre of what you build.

Responsibilities

Reduce the barrier for every engineer to build, ship, and operate their own code in production.
Build or improve self-service tooling and "golden paths" so teams can spin up new services without needing Platform's direct involvement.
Improve onboarding for new engineers, shrinking the time it takes someone to make their first meaningful production contribution.
Run or contribute to developer experience initiatives such as office hours, internal workshops, or "lunch and learn" sessions.
Write and maintain clear, discoverable documentation and runbooks.
Gather and act on developer experience signals to prioritise the roadmap based on real pain points.
Partner with engineering teams to understand their workflows first-hand.
Bring innovative ideas to the team and contribute meaningfully to the Platform roadmap.
Establish objective measures of "done" and document assumptions clearly.
Contribute to observability as code initiatives.
Provide a highly available and performant platform, including our AWS, Kubernetes (EKS) and MongoDB Cloud infrastructure.
Harden production systems, improving uptime, graceful degradation, and automated recovery.
Modernise CI/CD pipelines leveraging GitOps practices, making deployments faster, safer and more transparent.
Evolve Terraform-based Infrastructure as Code, improving consistency, reusability, and safety of infrastructure changes.
Establish or improve SLAs/SLOs for core platform infrastructure.
Work with Security to raise compliance and security posture without adding unnecessary burden on other engineering teams.
Identify and deliver infrastructure cost-saving opportunities.

Requirements

Solid background in software engineering (3-5 years), ideally having spent meaningful time as a product/application engineer before moving into platform work.
Experience building or contributing to internal developer platforms, portals, or self-service tooling.
Track record of designing "paved roads" or golden paths that make the right way the easy way for other engineers.
Experience improving CI/CD pipelines not just for reliability, but for speed and developer feedback loops.
Comfort running enablement activities: writing documentation, running training sessions, pairing with other teams, or acting as an internal advocate for good engineering practices.
Experience using developer experience metrics or frameworks to guide prioritisation.
Genuine interest in developer experience.
Worked with monitoring and observability tools such as Datadog.
Proficiency in at least one of: Go, Python, Typescript, or strong shell scripting skills.
Strong communication skills and comfort influencing technical direction across teams.
Desire to keep learning.
Deep understanding of core AWS services including IAM, S3, EC2, EKS, RDS, Lambda.
Experience running, maintaining and troubleshooting Kubernetes clusters (EKS) in a production, multi-tenant environment.
Proven experience with Infrastructure as Code, particularly Terraform, and configuration/deployment tooling such as Helm.
Hands-on experience with modern GitOps CI/CD tooling (Argo CD, Flux, or similar).
Experience with MongoDB or similar managed database platforms.
Experience monitoring and operating production systems (e.g. Datadog, Prometheus, Grafana).
Experience operating within a standards-compliant environment (e.g. ISO 27001).

Skills

Developer Productivity
Developer Experience
Internal Developer Platforms
Self-Service Tooling
Golden Paths
CI/CD
Enablement
Documentation
Developer Experience Metrics
Monitoring
Observability
Go
Python
Typescript
Shell Scripting
AWS
IAM
S3
EC2
EKS
RDS
Lambda
Kubernetes
Infrastructure as Code
Terraform
Helm
GitOps
Argo CD
Flux
MongoDB
Datadog
Prometheus
Grafana
ISO 27001

Location

UK
France

Work Type

Fully Remote

Experience Level

Senior
3-5 years software engineering experience

Benefits

Autonomy and ownership
36 days off (25 holidays + bank holidays + 3 extra days)
Private Health Insurance (physical, mental, dental, optical)
Hybrid & flexible work environment
Latest MacBook or Windows laptop
Wide range of equipment for home office setup
Work alongside inspiring team
Fantastic office space in Central London
Free barista coffee, tea, fruit, happy hours and activities

About the Company

Semble is on a mission to enable health professionals to amplify their impact.
We improve the way healthcare is delivered to millions of people by providing doctors and their teams with powerful, innovative, intuitive, and secure software.
Our cloud-based clinical system is already used by thousands of clinicians, making their lives easier and saving them money, while structuring their health data to help research.
We are a passionate and driven team, lucky to unite under strong cultural drivers: Impact, Collaboration, and Human touch.
The Platform team exists to make the whole engineering organisation more effective.
We are responsible for Developer Productivity and Experience, Developer Enablement and Engagement, Cloud Infrastructure, Agentic platform enablement, workflows and automation, Infrastructure as Code, and Modern CI/CD.

Equal Opportunity

We welcome applications from people of all backgrounds and all walks of life, including any typically underrepresented groups in the technology industry.
We also encourage applications from disabled and neurodiverse candidates, so if there are any adjustments we can make to support you throughout the recruitment process, please do let us know.