Careers

Senior Network Engineer

Are you a seasoned network engineer with a passion for high-performance systems and low-latency infrastructure? Mathisys Technologies Hellas, the European engineering arm of a leading global quantitative trading firm, is seeking a Senior Network Engineer to join our growing team in Athens.

Role Description

At Mathisys, Network Engineers architect the invisible infrastructure behind intelligence, the low-latency networks that enable decisions to move faster than the market itself.

In this position, you’ll design, deploy, and optimize systems where nanoseconds define performance. You’ll collaborate with global teams to shape the backbone of our trading environments, ensuring speed, stability, and precision across every packet that flows through our network. From fine-tuning protocols to automating observability and resilience, you’ll operate at the edge of what technology allows.

This is a role for engineers who think in systems, who see structure in complexity and performance as a product of design. You’ll work in an environment that rewards rigor, creativity, and constant optimization, surrounded by peers who share the same drive to make systems not just work but excel.

About the team

The Research & Alpha team brings quantitative researchers, software engineers and infrastructure specialists together around one goal: turning rigorous ideas into reliable systems. Small, multidisciplinary groups work closely from hypothesis through production, sharing ownership of performance, resilience and continuous improvement.

What You'll Do

  • Design, deploy, and manage high-availability, low-latency networks across trading environments.
  • Collaborate with global teams to support cross-location infrastructure.
  • Optimize performance across all layers of the network stack.
  • Automate configuration, monitoring, and troubleshooting workflows.
  • Improve and maintain system observability, reliability, and uptime.

Must-Have Qualifications

  • 2+ years of experience in networking and Linux-based systems.
  • Deep understanding of Layer 2/3 protocols, routing, and switching.
  • Experience with network performance tuning and packet capture analysis.
  • Proficiency in Python or Bash scripting and configuration management.
  • Hands-on experience with firewalls, VPNs, and enterprise-grade monitoring tools.
  • Strong analytical mindset and ability to perform in fast-paced, technology-driven environments.

Nice-to-Have

  • Experience in financial or trading systems, colocation, ultra-low-latency networks.
  • Familiarity with Arista, Onload, Cisco, Cumulus, or similar environments.
  • Exposure to global WANs, multicast, FPGA-based networking.

What we offer

  • Competitive salary with high-performance bonuses.
  • Private health insurance.
  • Collaboration with an international team of analysts.
  • Work with cutting-edge technologies, including low-latency systems, machine learning, and state-of-the-art trading systems.
  • Friendly, efficient, and motivating work environment.
  • Excellent opportunities for personal and career development.

Application

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Senior Network Engineer
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