Senior Site Reliability Engineer

Spectrum IT Recruitment; Southampton; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Life Insurance - 4 x Annual Salary

Private Medical Insurance

Employee Assistance Programme

Hybrid Working - 3 Days from Home

GP Online Assistance Portal

Job summary

Spectrum IT Recruitment is partnering with a Southampton-based team delivering cloud, SaaS and on-prem software to major organisations. You will oversee production environments, ensure system availability, and build tools to manage platform infrastructure.

The role emphasizes reliability, performance, and rapid delivery across distributed applications. You will engage in architectural discussions, optimize capacity, and lead cross-functional teams to implement automated, scalable solutions while

Qualifications

• 3–6 years hands-on experience in systems engineering, automation and site reliability.
• Proficient in at least one programming language (Python/Go/Java/C#) with scripting (Bash/PowerShell).
• Strong knowledge of AWS services (EC2/ECS/Lambda/DynamoDB) and reliability constraints.
• Experience with infrastructure-as-code (CloudFormation or Terraform).
• Knowledge of CI/CD (Jenkins, GitLab CI/CD or CircleCI).
• Solid understanding of containerization and microservices (Docker/Kubernetes).
• Observability/monitoring experience (Prometheus, Grafana, ELK, CloudWatch).
• Incident management and blameless postmortems; cross-functional leadership.

Responsibilities

• Monitor and interpret system metrics to fine-tune performance and troubleshoot issues.
• Collaborate with developers to improve service quality through testing and release practices.
• Lead architectural discussions and manage platform operations; contribute to capacity forecasting.
• Design and implement automated solutions for resilient, scalable systems.
• Maintain focus on delivering new features while ensuring stability and SLAs.
• Provide operational support and technical oversight for large-scale distributed applications.

Job description

Southampton HQ - 2 Times a week in Office

Cloud, SaaS, AWS,

The company deliver cutting-edge enterprise software solutions across both cloud and on-premises environments, empowering organisations to enhance customer experiences, maintain regulatory compliance, and proactively fight fraud. The company are trusted by businesses worldwide to drive seamless, intelligent customer interactions.

In this role, you'll oversee the production environment by ensuring system availability and maintaining a comprehensive perspective on overall health. You'll develop tools and software to support and streamline the management of platform infrastructure and key applications. A major focus will be enhancing the dependability, performance, and delivery speed of our software

products.

You'll also be responsible for analysing and fine-tuning system performance to anticipate user demands and drive innovation. Additionally, you'll take the lead in providing operational support and technical oversight for several large-scale distributed applications.

How You'll Contribute:

• Monitor and interpret system and application metrics to fine-tune performance and troubleshoot issues effectively
• Collaborate closely with developers to enhance service quality through thorough testing and structured release practices
• Engage in architectural discussions, manage platform operations, and contribute to capacity forecasting
• Design and implement automated solutions to build resilient, scalable systems
• Maintain a strong focus on delivering new features while ensuring stability and adherence to service level goals

You'll Stand Out If You Have:

• Practical experience managing large-scale Kubernetes clusters; certifications in Kubernetes are a strong bonus
• Hands-on familiarity with the Grafana Observability Suite, including tools like Loki, Mimir, and Tempo
• Background in administering or developing with popular monitoring and automation tools such as Splunk, Datadog, PagerDuty, or Rundeck
• Experience using configuration management platforms like Ansible, Puppet, or Chef
• Professional certifications in cloud DevOps, such as AWS Certified DevOps Engineer or Google Cloud Professional DevOps Engineer, or similar credentials

Do You Have What It Takes?

• 3-6 years of hands-on experience in a similar role, with a strong emphasis on systems engineering, automation, and service reliability
• Proficient in at least one programming language such as Python, Go, Java, or C#, along with scripting skills in Bash or PowerShell
• Solid grasp of cloud platforms like AWS, including an understanding of how core services like EC2, ECS, Lambda, and DynamoDB operate under reliability constraints
• Practical experience using infrastructure-as-code tools like CloudFormation or Terraform
• In-depth knowledge of CI/CD principles and hands-on experience with tools such as Jenkins, GitLab CI/CD, or CircleCI
• Strong understanding of containerization (e.g., Docker, Kubernetes) and microservices architecture
• Skilled in using observability and monitoring tools such as Prometheus, Grafana, ELK stack, or AWS CloudWatch
• Excellent analytical and troubleshooting abilities, especially within complex distributed systems
• Proven experience handling incident management and conducting blameless postmortems, including leading cross-functional teams through resolution and communication during critical outages
• Life Insurance - 4 x Annual Salary
• Private Medical Insurance
• Employee Assistance Programme
• Hybrid Working - 3 Days from Home
• GP Online Assistance Portal.
• + Much More