Lead Site Reliability Engineer

Factset; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Health coverage

Free lunch in the office (Mon–Fri)

Employee social events and sports

Job summary

Factset is seeking a Lead Site Reliability Engineer to ensure reliability, scalability, and performance of critical systems. You will collaborate with development and operations to automate processes and embed reliability into services from design through deployment.

The role involves defining SLOs/SLIs, leading incident response, and driving continuous improvements across teams in a hybrid working model in the Greater London area.

Qualifications

• Must have hands-on Kubernetes deployment and operations experience.
• Experience with Helm for packaging and deploying apps.
• Strong troubleshooting and incident‑response abilities.

Responsibilities

• Ensure reliability, scalability, and performance of systems and services.
• Respond to incidents, perform post-mortems, and drive improvements.
• Define and track SLOs/SLIs and collaborate with teams to build in reliability.
• Automate processes, reduce toil, and improve operational efficiency.
• Participate in on‑call rotations and assist capacity planning.

Skills

Kubernetes

Helm

English fluency

Networking

Storage

Security

Open-source

SRE principles

DevOps

Incident response

Education

Bachelors degree in Computer Science or related field

Job description

• We are looking for a skilled and motivated Lead Site Reliability Engineer to join our team. In this role, you will be responsible for ensuring the reliability, scalability, and performance of our systems and services. You will work closely with development and operations teams to build and maintain robust infrastructure, automate processes, and drive engineering best practices
• Monitor, maintain, and improve the reliability and availability of production systems
• Respond to and resolve incidents, conducting thorough post-mortems to prevent recurrence
• Define and track Service Level Objectives (SLOs) and Service Level Indicators (SLIs)
• Collaborate with development teams to build reliability into services from the ground up
• Design and implement automation to reduce toil and improve operational efficiency
• Participate in an on-call rotation to support critical systems
• Contribute to capacity planning and performance optimization efforts
• Document systems, processes, and runbooks to support the wider team

Benefits

• Comprehensive health coverage for employees and their families, at little or no cost to employees
• Free working lunch in the office Monday through Friday
• A social community involved in sports, charities, and in-office events
• Certification reimbursement for eligible expenses related to the CFA, IPM, CAIA, and FRM exams
• Generous PTO for personal, vacation, parental and medical leave
• Wellness discounts across gyms and other facilities

Strong understanding of core Kubernetes concepts including Pods, Deployments, Services, ConfigMaps, and IngressHands-on experience deploying, managing, and troubleshooting workloads in KubernetesMust be fluent in English both verbal and writtenUnderstanding of Kubernetes networking, storage, and security best practicesFamiliarity with Helm for application packaging and deploymentBachelors degree in computer science or relevant degreeExperience with Kubernetes cluster management and administrationWilling to work a hybrid modelCommitment to a blameless culture and continuous learningStrong problem-solving and analytical skills with a methodical approach to troubleshootingExcellent communication skills with the ability to collaborate across technical and non-technical teamsAbility to work effectively under pressure, particularly during incident responseA proactive mindset with a focus on automation and continuous improvementExperience contributing to open-source projectsFamiliarity with SRE principles as defined by the Google SRE handbookPrevious experience in a DevOps or Platform Engineering role