Performance Engineer

About Axi

Axi was founded in Sydney in 2007 as a two-person startup. It has grown into a top global brokerage that’s trusted by tens of thousands of clients in 100+ countries. We offer a multi-asset trading service that allows clients of all levels to achieve their goals by trading and investing in global financial markets.

Our success is built on having top products, cutting-edge trading technology, award-winning service, and by having a great team of people working together all around the world – we hope you’ll enjoy getting to know them!

Axi is proud to have an honest and trusted reputation, with the Axi Group of companies operating under full financial regulation in different regions around the world, governed by ASIC, FCA, DFSA, FMA and CySec.

Let's talk about the cool stuff you do at Axi!

The Performance & Reliability team works cross-functionally with domain PODs, SRE, and Architecture to shape and enforce performance standards, identify bottlenecks, and drive continuous optimization across services, APIs, and clients. You will be the voice for performance, helping teams design faster systems from inception.

Your EDGE Assignment/You Will

• Plan and conduct performance, load, stress, and soak tests for .NET Core microservices, React and React Native clients, SQL Server/Cosmos DB queries, and messaging systems.

• Profile services and applications to identify performance bottlenecks: CPU, memory, I/O, network, and database contention using tools like Perfview, dotTrace, Azure Monitor, and browser dev tools.

• Recommend and validate optimizations at code level (async patterns, caching, batching), database level (query tuning, indexing, partitioning), and infrastructure level (resource limits, autoscaling).

• Define and monitor performance budgets, SLOs/SLIs, and capacity plans for critical services, alerting teams to regressions or approaching limits.

• Work with Kubernetes/AKS teams on resource allocation, autoscaling strategies, and performance implications of deployments.

• Build and maintain performance dashboards and monitoring, visualizing metrics from Application Insights, Prometheus, or similar tools.

• Document performance best practices, anti-patterns, and decision trees to guide teams.

Technical Requirements

• Hands-on experience with performance testing frameworks and tools (e.g., JMeter, k6, Locust, custom harnesses).

• Strong understanding of .NET Core runtime behavior: async patterns, TPL, thread pool, GC, memory allocation, and profiling techniques.

• Proficiency with .NET profiling tools: Perfview, dotTrace, Application Insights, or equivalent; ability to interpret ETW traces and metrics.

• Solid knowledge of SQL Server performance: query plans, indexing strategies, execution time analysis, and workload characterization.

• Familiarity with NoSQL performance tuning: Cosmos DB throughput, partitioning, consistency trade-offs, and cost modeling.

• Understanding of browser and mobile performance: network waterfall analysis, rendering performance, JavaScript profiling, and memory leaks.

• Exposure to Kubernetes resource management: CPU/memory requests and limits, QoS classes, and impact on performance.

• Knowledge of observability tools: Application Insights, Prometheus, Grafana, or similar; ability to correlate metrics and traces to identify root causes.

Experience and Skills

• 4–8 years of experience in performance engineering, preferably for distributed, microservices-based systems.

• Strong debugging and troubleshooting mindset with ability to work backwards from customer impact to root cause.

• Experience collaborating with multiple teams across geographies to validate findings and drive implementation.

• Excellent written and verbal communication; ability to present findings and recommendations to both technical and non-technical audiences.

Axi's bag of delights

• Competitive and attractive compensation.

• Extensive learning opportunities, such as professional training and certifications and soft skills development.

• 18 annual leave days per year.

• 12 sick days leave per year.

• Public holidays as declared by local government.

• Maternity leave as per law.

• Health Insurance.

Axi's interview journey

• Talent Acquisition Interview (45 minutes)

• Hiring Manager Exploratory Discussion (45–60 min)

• Technical Performance Round (60–75 min )

• Design & Debugging Round (60 min )

• Cultural Interview (30 minutes)

At Axi, we prioritise creating a workplace that upholds fairness and respect for all. We encourage every individual within our community to contribute towards a culture where everyone feels a sense of belonging and is treated with the dignity they deserve. We make all employment-related decisions—whether in hiring, compensation, training, performance reviews, or termination—based on merit and without bias, ensuring equal opportunities for everyone. We consciously work to identify and overcome any unconscious biases, with a commitment to fostering an inclusive environment where every employee and candidate feels genuinely welcomed and valued.

Please note that our organization works with recruitment agencies on a pre-approved basis only. A recruitment agency that wishes to submit candidate profiles or resumes for consideration must obtain prior written consent from our talent acquisition team. We do not accept unsolicited resumes from recruitment agencies, and we will not be responsible for any fees related to unsolicited resumes. Should we receive an unsolicited resume from a recruitment agency that does not have prior written consent, we will not be responsible for the payment any fees related to the recruitment of the candidate represented in the unsolicited resume.