The Role

• Design, build, deploy and operate production backend systems that clinicians can rely on in day-to-day assessment work.
• Develop the AWS cloud infrastructure supporting the product and improve its reliability, scalability and operational clarity.
• Establish advanced observability, monitoring and incident-response practices, including the implementation of tracing and logging pipelines.
• Design robust APIs, databases and schemas for structured information at scale, ensuring performance under high-traffic conditions.
• Apply security and data-protection principles throughout design and delivery, including encryption, access control and automated compliance monitoring.
• Navigate and contribute to existing codebases, identifying opportunities to improve system health and performance.
• Work with engineering, operational and clinical stakeholders to explain trade-offs and solve problems in an evolving startup environment.
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What We're Looking For

• At least five years of relevant professional experience in a production environment.
• A track record of owning business-critical backend systems through design, deployment, monitoring and on-call support.
• Extensive experience with AWS infrastructure and services, including ECS, Fargate, Lambda, Aurora and DynamoDB.
• Proficiency in Infrastructure as Code using Terraform to manage and evolve cloud environments.
• Advanced observability skills, with experience using tools such as OpenTelemetry, Prometheus or Honeycomb to manage high-volume telemetry data.
• Experience handling high-scale data or high-traffic services (e.g. 1,000+ TPS).
• Practical experience handling sensitive personal or health information and applying GDPR and core data-protection controls.
• The ability to quickly understand and improve unfamiliar codebases to maintain system reliability.
• Security-first engineering judgement and the ability to preserve reliability and data integrity while working quickly through ambiguity.
• Ability to work in our London office at least two days per week.
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