Senior Site Reliability Engineer

Job Summary

The Senior Site Reliability Engineer is a key technical leadership role at the intersection of infrastructure, platform engineering, operational resilience, and developer enablement. At Partnerize, we operate a high‑scale platform processing over a billion daily events across a hybrid estate spanning on‑prem data centres and AWS cloud infrastructure. You will play a critical role in ensuring our systems remain reliable, scalable, secure, and operationally efficient whilst helping evolve our engineering culture towards a modern “you build it, you own it” model.

This is not a purely operational support role. We are looking for an experienced technical leader and subject matter expert who can balance hands‑on engineering with strategic thinking – someone capable of modernising legacy systems, improving observability and automation, and guiding engineers through increasingly complex distributed environments.

At the heart of our platform, we process and distribute performance marketing data at enormous scale, generating over a billion events across our infrastructure daily. Our systems power real‑time decision making, partner attribution, analytics, and customer‑facing products that require high availability and operational excellence.

As we continue to scale globally, we are evolving our infrastructure, modernising legacy systems, and investing heavily in automation, containerisation, observability, and platform reliability. We deploy to production multiple times a day and operate a hybrid environment spanning physical data centres and AWS cloud services.

• Lead Reliability & Operations – Take ownership of platform reliability, availability, and operational performance across a complex hybrid estate supporting Partnerize, Brand Verity, Ascend, and Konnecto.
• Drive Platform Modernisation – Help lead the transition from legacy operational models towards modern containerised infrastructure and self‑service engineering platforms.
• Champion Dev Ops Enablement – Empower development teams through automation, tooling, and platform improvements that support a “you build it, you own it” engineering culture.
• Act as a Technical Authority – Provide technical leadership and guidance across infrastructure, distributed systems, security, observability, and operational best practices.
• Improve Security & Resilience – Partner closely with security and compliance teams to strengthen platform security posture, conduct threat modelling, vulnerability assessments, and support secure‑by‑design engineering practices.
• Mentor & Develop Engineers – Act as a player‑coach within the SRE organisation, mentoring engineers, supporting technical growth, and helping shape future technical leaders.
• Lead Incident Management – Take ownership during major incidents, driving clear communication, structured troubleshooting, and pragmatic resolution strategies across the wider business.
• Drive Automation & Continuous Improvement – Continuously improve infrastructure, deployment pipelines, monitoring, and operational tooling to improve reliability, scalability, and delivery velocity.

• Deep Technical Expertise – Strong experience operating and supporting distributed systems at scale across Linux, cloud, and hybrid infrastructure environments.
• Platform Engineering Experience – Hands‑on expertise with Kubernetes, Docker, Terraform, Ansible, CI/CD pipelines, and infrastructure automation.
• Strong Systems Thinking – The ability to troubleshoot complex systems methodically, balancing operational stability with long‑term architectural improvements.
• Security & Operational Awareness – Experience applying security principles within Dev Ops and distributed systems environments, including threat modelling, vulnerability assessment, and operational risk management.
• Pragmatic Problem Solving – Confidence moving between strategic platform initiatives and low‑level operational troubleshooting within high‑pressure environments.
• Leadership & Mentorship – Experience coaching engineers, delegating work effectively, and helping…