Linux System Administrator

Linux System Administrator – Crypto High-Frequency Trading

 

Location: Open

 

About Selini:

Selini is a global trading firm focused on systematic trading and venture investing - all within the digital assets space.

 

Overview

We are seeking a Linux System Administrator with 3–15 years of experience to support and optimize our trading infrastructure. This role will focus on managing and improving our on-prem and cloud-based systems, ensuring high availability, security, and performance for our trading environment.

The ideal candidate will also have exposure to AI-driven observability and anomaly detection, leveraging M.E.L.T. (Metrics, Events, Logs, Traces) data to enhance system reliability and insight.

Key Responsibilities

• Administer and maintain Rocky Linux-based infrastructure for trading and research environments.Manage on-prem clusters (HTCondor) and AWS-based infrastructure, ensuring reliability and efficiency.
• Automate system administration tasks using Bash, Python, or Ansible.
• Monitor system performance, troubleshoot issues, and implement optimizations.Apply AI-assisted or data-driven anomaly detection to proactively identify performance or reliability issues across M.E.L.T. (Metrics, Events, Logs, Traces) pipelines.
• Ensure security best practices are followed for system hardening and access control.
• Handle network configuration, performance tuning, and troubleshooting.
• Work closely with developers and traders to support infrastructure needs.
• Manage user accounts, permissions, and system-level access controls.

Collaborate with data and AI teams to integrate intelligent monitoring and predictive insights into infrastructure operations.

Preferred Skills

• Familiarity with HTCondor or other high-performance compute clusters.
• Experience with low-latency or high-performance trading environments is a plus.
• Strong troubleshooting and problem-solving skills in production-critical environments.Ability to work independently and collaborate across teams.
• Exposure to AI/ML-driven observability or anomaly detection frameworks using M.E.L.T. data (Metrics, Events, Logs, Traces).
• Experience working with monitoring and telemetry tools such as Prometheus, Grafana, ELK/OpenSearch, or OpenTelemetry, especially in the context of intelligent alerting or predictive diagnostics.

Soft Skills & Culture Fit

• Strong analytical mindset and ability to work in high-pressure, real-time environments.
• Team-oriented, with a focus on collaboration and proactive problem-solving.

We’re a close-knit team that values:

• High ownership and initiative
• Curiosity, intellectual honesty, and rapid learning
• Clear, direct communication
• Working together toward shared goals — no ego, no politics

We hire people who love building, solving, and improving — and who want to learn from and contribute to a team of exceptional peers.

Compensation & Benefits:

• Very competitive compensation, with strong upside based on contribution and performance
• Competitive holiday allowance 
• Complimentary daily lunch
• High-spec office and technology
• Team socials
• Global company offsites and development opportunities