Senior Site Reliability Engineer

Source Technology Limited; Colchester; On-site; GBP 85,000 - 110,000; Full time

Job summary

Source Group International Ltd in the United Kingdom is seeking a Senior Site Reliability Engineer to enhance reliability, availability, and scalability of our SaaS platform. You will blend software engineering with cloud infrastructure, automation, and operational leadership to deliver resilient systems that enable rapid product delivery.

You will own production reliability, define SLI/SLO, lead blameless postmortems, and automate toil.

Qualifications

• Proven experience as a Senior/experienced SRE with software engineering background.
• Strong knowledge of SRE principles, incident management and observability.
• Hands-on with Azure, Kubernetes, IaC and monitoring platforms.

Responsibilities

• Own the reliability and performance of production services.
• Define and operate SLIs, SLOs, and error budgets with engineering teams.
• Lead incident response and drive blameless postmortems and continuous improvement.
• Automate operational processes and reduce manual toil through engineering.
• Build and operate cloud-native platforms using Azure, Kubernetes, and Infrastructure as Code.
• Develop observability through effective monitoring, alerting, and telemetry.
• Mentor engineers and promote reliability best practices across the organisation.

Skills

SRE principles

Automation

Observability

Incident management

Cloud platforms

Azure

Kubernetes

Infrastructure as Code

Monitoring

Software engineering

Tools

Prometheus

Grafana

Datadog

Job description

Overview

The Senior Site Reliability Engineer is responsible for the reliability, availability, scalability, and operational excellence of our SaaS platform. This role combines software engineering, cloud infrastructure, automation, and operational leadership to build resilient systems that enable rapid product delivery.

Responsibilities

• Own the reliability and performance of production services.
• Define and operate SLIs, SLOs, and error budgets with engineering teams.
• Lead incident response and drive blameless postmortems and continuous improvement.
• Automate operational processes and reduce manual toil through engineering.
• Build and operate cloud-native platforms using Azure, Kubernetes, and Infrastructure as Code.
• Develop observability through effective monitoring, alerting, and telemetry.
• Mentor engineers and promote reliability best practices across the organisation.

Experience

• Proven experience as a Senior or experienced Site Reliability Engineer with a software engineering background.
• Ability to diagnose and make safe changes to PHP and Java or .NET applications.
• Experience operating large-scale production SaaS systems.
• Strong knowledge of SRE principles, incident management, observability, and operational excellence.
• Hands‑on experience with Azure, Kubernetes, Infrastructure as Code, and monitoring platforms such as Prometheus, Grafana, or Datadog.
• Experience influencing engineering teams and driving reliability improvements through collaboration and technical leadership.

Key Attributes

• Passion for building reliable production systems.
• Software engineering mindset with a focus on automation.
• Strong technical judgement and ownership.
• Excellent communication during incidents and day‑to‑day collaboration.
• Commitment to blameless culture and continuous improvement.

By applying for this role, you consent to SGI contacting you by telephone regarding recruitment services, market updates, and relevant business opportunities.

We believe in equal opportunity for all and actively encourage applications from diverse backgrounds, experiences, and perspectives.

Source Group International Ltd is acting as an Employment Business in relation to this vacancy.