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About the Role

As a Senior Site Reliability Engineer at CMC Markets, you will work on platforms that support millions of trading decisions. You will play a key role in improving reliability, availability, and performance across large-scale systems, ensuring customers can access markets when it matters most. Your work will be highly visible and meaningful, giving you a strong sense of contribution and pride in what you deliver. This role offers rich opportunities to grow your technical capability across observability, automation, and modern infrastructure. By working closely with development teams, you will learn how to embed reliability early in the software lifecycle and reduce operational risk at scale. Acting as a subject matter expert, you will guide best practices, lead post-incident reviews, and help define standards that improve long-term system resilience.

Responsibilities

Establish, maintain, and report on SLIs, SLOs, and error budgets to improve service reliability.
Improve observability standards, patterns, and best practices through metrics, logs, distributed tracing, dashboards, alerting, and actionable signals, including leading OpenTelemetry adoption.
Lead incident response, triage, stakeholder communications, blameless post incident reviews, and root cause analysis.
Reduce operational toil through automation, self service capabilities, safe deployments, automated recovery, and reusable tooling.
Partner with engineering teams to improve reliability focused architecture, release safety, operational readiness, and change risk management.
Improve performance, scalability, resilience, and capacity management across production services.
Build and maintain runbooks, playbooks, operational documentation, dashboards, templates, and internal services.
Improve the reliability, availability, and performance of large scale .NET and TypeScript applications.
Design and manage Infrastructure as Code using Terraform and related tooling.
Troubleshoot complex production issues across application, infrastructure, and network layers.
Act as the SME for reliability, observability, performance, and operational excellence.
Participate in on call rotation, if and when required.
Maintain personal/professional development to meet the changing demands of the role, including all relevant regulatory and legislative training.

Requirements

7+ years in SRE, DevOps, Platform Engineering, or similar.
Strong enterprise grade experience with C# and .NET, including ASP.NET and .NET Core, and the ability to write production-grade code that improves reliability and operability.
Senior-level experience supporting production systems in SRE, DevOps, or platform engineering roles.
Proven experience implementing OpenTelemetry and designing effective observability using metrics, logs, traces, and correlation.
Experience with monitoring and alerting platforms such as Prometheus, Grafana, Application Insights, or similar.
Familiarity with CI/CD pipelines and infrastructure automation.
Strong problem-solving skills and a calm, methodical approach to incidents, root cause analysis and production issues.
Ability to influence system design, deployment, and operational practices at scale, providing technical guidance and leadership.
Proficiency in Typescript.
Experience working with AWS.
Experience of working within the financial industry.
Australian working rights is essential.

Skills

SRE
DevOps
Platform Engineering
C#
.NET
ASP.NET
.NET Core
OpenTelemetry
Metrics
Logs
Traces
Prometheus
Grafana
Application Insights
CI/CD
Infrastructure Automation
Typescript
AWS
Terraform

Location

Sydney, Australia

Work Type

Onsite
Full-time

Experience Level

Senior-level
7+ years

Benefits

Birthday off
Free annual charity day
$0 Trades for staff & family trading accounts
Continuous learning and L&D offering
Unlimited access to a dedicated benefits & wellbeing hub
Retailer discounts
Free breakfast cereals, condiments, and coffee
Culture club activities

About the Company

CMC Markets is a global leader in CFD trading and share investing.
CMC Markets is one of the world’s first ever fin-tech companies, launched in 1989 to break down the barriers of financial trading and make trading accessible to everyone.
Our mission is to use our award-winning, Next Generation trading platform and unparalleled client service to empower millions of people to have the best trading experience out there.
Our clients can trade on thousands of instruments using the best technology, supported by sophisticated charting, competitive pricing and automated execution.
We're trusted by investors globally, but also by banks, brokers, funds and trading desks though our top-tier liquidity institutional offering, enabling these businesses to expand into new markets and increase revenue potential.
We were recently listed on the FTSE250, and our business continues to go from strength to strength as we continue to invest in our technology and our people.

Equal Opportunity

CMC Markets is an equal opportunities employer and is committed to creating a diverse and inclusive workplace, where our people feel confident to be themselves, feel valued and are able to do their best work.
We don’t just value differences and unique perspectives, we seek them out and we invite them in, because we know it will lead to better outcomes for everyone.