Sr. Site Reliability Engineer (UK)

In this role you will enhance the reliability, scalability, security, and efficiency of Firstup’s multi-tenant cloud platform. You’ll work with Engineering, Information Security, and Customer Success to build an operability culture that protects customers and supports platform growth. You will lead incident response, drive durable improvements, and shape the reliability program across the stack. This is a chance to influence production readiness and reduce toil at scale.

• PTO program
• health benefits
• remote work
• casual and friendly environment
• growth opportunities

• Design, build and operate reliable production services in collaboration with application teams
• Identify and resolve reliability, performance and operational issues across the stack
• Establish SLIs/SLOs, error budgets, and reliability standards
• Develop and maintain an SRE scorecard for service health and operational maturity
• Lead MTTR reduction initiatives via telemetry, automation, and incident response practices
• Own monitoring and observability strategy across metrics, logs, traces, and APM
• Drive post-incident actions to yield measurable reliability improvements
• Eliminate toil through automation, self-service, and standardized tooling
• Define production-readiness requirements for new services and changes
• Improve deployment safety with progressive delivery and rollback mechanisms
• Provide technical leadership and coaching to raise engineering maturity
• Communicate reliability risks clearly to stakeholders
• Participate in on-call rotations to restore service-impacting issues

• BS or MS in Computer Science (or equivalent) with 8+ years of experience
• Strong SRE/production or platform engineering experience in large-scale, multi-tenant environments
• Proficient across full tech stack: apps, APIs, containers, Kubernetes, cloud infra, networking, databases
• Experience operating production workloads in AWS and Kubernetes
• Strong observability skills: monitoring, logging, distributed tracing, APM; Datadog expertise
• Experience defining SLIs, SLOs, error budgets, and reliability scorecards
• Experience diagnosing latency, resource contention, database performance, and distributed-system issues
• Automation and software engineering skills in Python, Go, Java, JavaScript/TypeScript or similar
• Experience with Terraform, CI/CD, config management, and automated deployments
• Ownership mindset with ability to identify reliability gaps and drive improvements
• Excellent written and verbal communication for technical and non-technical stakeholders
• Willingness to participate in on-call rotations and improve tooling and automation

• strong communication
• ownership mindset
• collaboration across teams
• AWS
• Kubernetes
• Datadog