Requirements

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 you'll be doing

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 Optiver’s 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

A performance-based bonus structure, enabling all employees to benefit from the global profit pool
The opportunity to work alongside best-in-class professionals from over 50 different countries
25 paid vacation days in the first year, increasing to 30 from the second year onwards
Training opportunities, discounts on health insurance, and fully paid first-class commuting expenses
Extensive office perks, including meals, barista coffee, physio and chair massages, sports and leisure activities, and Friday afternoon drinks
Training and continuous learning opportunities, including access to conferences and tech events