[Hiring] Senior Platform Engineer @Semble

Role Description

As a Senior Platform Engineer, you'll 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'll champion infrastructure best practices, shape team goals, and influence the wider engineering roadmap. Just as importantly, you'll 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: you'll be expected to make sound architectural judgement 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.

Qualifications

• A 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 (e.g. Backstage, custom CLIs, service catalogues).
• A 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 (e.g. DORA metrics, SPACE framework, internal DevEx surveys) to guide prioritisation.
• A genuine interest in developer experience.
• Worked with monitoring and observability tools such as Datadog.

Requirements

• Proficiency in at least one of: Go, Python, Typescript, or strong shell scripting skills.
• Strong communication skills and comfort influencing technical direction across teams.
• A 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).

Benefits

• The great feeling coming with knowing you do something that matters: shaping the future of healthcare!
• Autonomy and ownership.
• 36 days off: 25 holidays + bank holidays + 3 extra days (birthday and ‘feel good’ days).
• Private Health Insurance covering physical and mental health, as well as dental and optical.
• Hybrid & flexible work environment.
• Get the tech you need: latest MacBook (unless you prefer Windows) and a wide range of equipment for your home office.
• Work alongside an inspiring team.
• Fantastic office space in Central London, right outside Monument.
• The usual free bits coming with nice offices (barista coffee, tea, fruit, happy hours and activities).