Performance Test Engineer - 18 month maximum contract role

CMC Markets; Sydney; On-site; AUD 140,000 - 190,000; Full time

Benefits offered by this job

My Days leave

Birthday leave

Charity day

Free breakfast & coffee

L&D training

Benefits & wellbeing hub

Job summary

CMC Markets is seeking an experienced Performance Test Engineer to join the Engineering & Architecture, Core Services team on an 18 Month Maximum Term Contract. You will build a performance testing framework, define test strategy, and execute load, stress, and scalability tests for our trading platforms deployed in AWS.

You will collaborate with developers and DevOps to integrate testing into the development lifecycle, design and monitor KPIs, and produce actionable performance reports to

Qualifications

• 5+ years of experience as a Performance Tester.
• Strong experience in performance and non-functional testing.
• Experience with K6 (JavaScript-based scripting).
• Experience testing C# / .NET applications.
• Solid understanding of AWS cloud architecture and distributed systems.

Responsibilities

• Design, develop, and execute performance, load, stress, endurance, and scalability tests using k6.
• Build and maintain reusable performance test frameworks and scripts.
• Analyse test results to identify bottlenecks across application, database, and infrastructure.

Skills

K6 scripting

AWS

REST APIs

C# .NET

CI/CD

Performance testing

Tools

K6

Job description

Introduction

We are looking for an experienced Performance Test Engineer to join our Engineering & Architecture, Core Services team on an 18 Month Maximum Term Contract. This is a newly created position, you will be building a performance and load testing framework and defining the overall test strategy. You will be defining and implementing comprehensive performance testing strategies, including best practices and standards. You will be responsible for developing and executing a range of tests, including load, stress, endurance, and scalability testing. Analysing system behaviour under load and providing actionable insights to improve performance Collaborating with engineering teams to integrate performance testing into the development lifecycle. This is a hands on engineering role where you can take ownership of your work, contribute to building from the design to execution phase, make technical decisions, and help build a strong, scalable platform that supports our trading platform.

Why you'll like working here

Just some of the reasons you’ll love working here include:

Leave benefits:

• Accrue 5 additional annual leave entitlements each year called My Days, as well as enjoying 5 extra annual leave days once you pass 12 months.
• Enjoy your birthday off to spend time with family and friends, on us!
• Utilise a free annual charity day to give back to your community.

$0 Trades:

• Staff & family trading accounts with CMC Markets Invest have access to the best brokerage rates in the market - $0 trades for all domestic and international equity orders!

Continuous learning:

• Our L&D offering covers both technical and performance training, ensuring you're always learning new skills.

Unlimited access to a dedicated benefits & wellbeing hub where you can save money through various retailer discounts, and make use of a variety of resources that will enhance your physical and mental wellbeing

• Unlimited access to a dedicated benefits & wellbeing hub where you can save money through various retailer discounts, and make use of a variety of resources that will enhance your physical and mental wellbeing

Collaboration:

• We believe that great things happen when smart people work together, that’s why we’ve made the decision to work five days in the office.

Office perks:

• Help yourself to free breakfast cereals, condiments, and coffee to fuel your workday.
• Our culture club provides opportunities for everyone whether you’re into fitness, pizza making classes, socialising or bringing out your competitive side in trivia or lawn bowls!

What you’ll be working on?

This role focuses on performance testing of C#/.NET applications deployed in AWS, using k6 as the primary performance testing tool.

• You will work closely with developers, architects, and DevOps teams to ensure our platforms are scalable, reliable, and performant under real-world load.
• You will also play a key part in building platforms from scratch, ensuring they are designed and tested to perform effectively under real world conditions.
• You’ll lead performance and non-functional testing across critical trading platforms, ensuring they remain scalable, resilient, and responsive.
• You will design, execute, and continuously improve performance testing for high-availability systems across both on premise and cloud-based environments.
• Design, develop, and execute performance, load, stress, endurance, and scalability tests using k6.
• Build and maintain reusable performance test frameworks and scripts.
• Analyse test results to identify bottlenecks across application, database, and infrastructure layers.
• Collaborate with developers to diagnose performance issues and validate fixes.
• Test cloud-native architectures deployed in AWS.
• Integrate performance tests into CI/CD pipelines.
• Define and monitor performance KPIs, SLAs, and non-functional requirements.
• Produce clear performance test reports with actionable recommendations.
• Support capacity planning and performance tuning initiatives.
• Advocate for performance testing best practices across teams.

What will help you be successful?

• Must have 5+ years of experience as a Performance Tester.
• Strong experience in performance and non-functional testing.
• Must have strong experience with K6 (JavaScript-based scripting).
• Experience testing C# / .NET applications.
• Solid understanding of AWS cloud architecture and distributed systems.
• Experience with REST APIs, HTTP protocols, and JSON.
• Ability to analyse performance metrics (CPU, memory, latency, throughput, error rates).
• Familiarity with CI/CD tools (e.g. GitHub Actions).
• Strong problem-solving and communication skills, able to communicate effectively with stakeholders.
• An understanding of financial services or stockbroking platforms will be beneficial, but not essential.

The things we live by

We’re an equal opportunities employer and are 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.

CMC Markets is one of the world’s first ever fin-tech companies and was 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 through 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.