Linux Engineer, Sydney

Who We Are

Optiver is a global market maker founded in Amsterdam with offices in London Chicago Austin New York Sydney Shanghai Hong Kong Singapore Taipei and Mumbai. Established in 1986 today we are a leading liquidity provider with close to 2000 employees in offices around the world united in our commitment to improve the market through competitive pricing execution and risk management. By providing liquidity on multiple exchanges across the world in various financial instruments we participate in the safeguarding of healthy and efficient markets. We provide liquidity to financial markets using our own capital at our own risk trading a wide range of products: listed derivatives cash equities ETFs bonds and foreign currencies.

Optivers Sydney office is one of the primary players within Asian markets trading a range of products. Established in 1996 were an active participant on the Hong Kong Korea Singapore Taiwan and Japan exchanges and act as Optivers APAC head office.

What Youll Do

Our Linux engineering team ensures that our critical trading servers and infrastructure operate efficiently and reliably across the a highly customized bare-metal environment powered by proprietary tools and technology youll help design and implement cutting-edge solutions that enable scalable technological evolution while maintaining peak performance together with speed and precision.

As a Linux Engineer your responsibilities will include:

• Designing deploying and managing the lifecycle of a large-scale fleet of Linux servers across multiple data centers ensuring reliability performance and scalability.

• Architecting building and maintaining systems that drive efficiency and support Optivers evolving technology stack.

• Ensuring system reliability by swiftly resolving incidents and optimizing performance to meet trading demands even during extreme market conditions.

• Researching and implementing new technologies or building enhanced in-house solutions to improve performance and system stability.

• Bridging the gap between hardware and software to ensure seamless interaction and integration.

• Optimizing system and kernel performance including CPU affinity NUMA balancing HugePages IRQ tuning and other low-level configurations.

• Developing and maintaining automation tools using Python to enhance system efficiency.

• Monitoring system health and performance using observability tools such as Prometheus Grafana and Alertmanager.

• Managing system provisioning and infrastructure deployment using Infrastructure-as-Code tools like Ansible and/or Terraform.

• Joining our rotating support and on-call roster to facilitate global trading operations.

Who You Are

• Experience in Linux engineering debugging administration and OS system provisioning

• A solid understanding of networking fundamentals including TCP/IP DNS TCP/UDP/multicast and packet analysis.

• Hands-on experience with system/network tools such as EBPF tcpdump strace ntp/ptp lsof nc.

• Experience with performance tuning at both the kernel and hardware level including CPU pinning cache optimizations and BIOS/UEFI tuning.

• Experience with Linux security hardening techniques.

• Experience managing SAN storages.

• Familiarity with CI/CD pipelines version control systems (Git) and PR-based workflows.

• Strong experience with monitoring and alerting tools like Elastic Prometheus Grafana and Alert Manager.

• Proficiency in Python for automating operational tasks and system administration.

• Ability to manage large projects work collaboratively in a team and communicate effectively to drive technical improvements.

• Willingness to learn new technologies navigate frequent change and contribute to a high-performance engineering environment.

What youll get

• A performance-based bonus structureunmatchedanywhere in the industry. We combine our profits across desks teams and offices into a global profit pool fostering a truly collaborative environment.

• The chance to work alongside diverse and intelligent peers in a rewardingenvironment.

• Training mentorship and personal development opportunities.

• Daily breakfast lunch and an in-house barista.

• Gym membership plus weekly in-house chair massages.

• Regular social events including a company trip every two years.

• Guided relocation a competitive relocation package and visa sponsorship where necessary.

Optiver is committed to diversity and inclusion. We encourage applications from candidates of all backgrounds and welcome requests for reasonable adjustments during the process.

Questions Get in touch with the recruitment team at .