Senior Site Reliability Engineer - UK

Heidi is building an AI Care Partner that supports clinicians every step of the way, from documentation to delivery of care. This role sits in the core Platform/SRE team that owns production. You’ll work directly on incident response, on-call, system reliability, and day-to-day operations for Heidi’s platform.

Responsibilities

Participate in on-call and incident response: Respond to production incidents, contribute to service restoration, and support clear communication during incidents. Over time, take increasing responsibility for leading incidents end-to-end.; Improve operational reliability: Identify recurring issues and reliability risks, and drive fixes through better alerting, automation, system changes, or process improvements.; Own parts of the production environment: Operate and improve Kubernetes clusters, cloud infrastructure, and core platform services, with growing ownership as familiarity increases.; Strengthen observability: Improve dashboards, alerts, logs, and traces so issues are detected earlier and diagnosed faster, with a strong focus on actionable signals.; Reduce operational toil: Automate repetitive tasks, simplify runbooks, and improve tooling to make on-call and day-to-day operations easier and safer.; Support safe change: Improve deployments, rollback mechanisms, and operational readiness to reduce the risk of incidents caused by change.; Contribute to operational practices: Write and maintain runbooks, participate in blameless post-mortems, and help improve incident response processes over time.; Collaborate closely with engineers: Work with product and feature teams to improve production readiness, service ownership, and reliability expectations.

Requirements

3–6+ years in SRE, DevOps, Platform, or operations-heavy engineering roles; Experience supporting production systems and participating in on-call rotations; Comfortable debugging live systems under pressure; Experience operating cloud infrastructure (AWS preferred); Working knowledge of Kubernetes and containerised workloads; Infrastructure as Code experience (Terraform or similar); Familiarity with monitoring and alerting tools (Datadog, Prometheus, etc); Scripting or automation experience (Python, Bash, or similar)

Nice to have

Experience leading incidents or mentoring others during on-call; Experience in regulated or security-sensitive environments; Familiarity with databases, queues, and caches in production; Interest in reliability practices such as SLOs, error budgets, and capacity planning

Benefits

Equity from day one; Unmatched impact; Work alongside world-class talent; Comprehensive private medical and dental cover through Bupa, plus 24/7 mental health, coaching and wellbeing support through Sonder and a £100/month Healthy Heidi’s stipend; Global parental leave - 26 weeks paid for primary carers and 18 weeks for secondary carers, subject to eligibility; Fertility support - £7,000 one-off payment, eligibility applies; Learning & development - £700 per year for courses, books, memberships, conferences and more; Home office budget - £500 one-off to set up a workspace you actually want to work in; Recharge days after major milestones and busy periods; Work from anywhere for up to 4 weeks per year; Clinical leave - 10 days per year for eligible clinical roles to maintain accreditation and requirements; Flexibility that works - hybrid environment, with 3 days in the office