System Administrator – HFT (Linux & Low-Latency Systems) Full Time NEW

Job Summary :

We are looking for a highly skilled System Administrator with deep expertise in Linux systems and a thorough understanding of HFT infrastructure. In this role, you will be responsible for deploying, managing, and continuously optimizing mission-critical, low-latency trading environments. You will manage data centre infrastructure, high-speed networks, and large-scale trading data systems where performance is measured in microseconds. You will work closely with traders, quantitative researchers, and software developers to ensure the infrastructure always performs at peak capacity with maximum uptime.

Key Responsibilities

Linux System Administration

• Deploy, configure, and maintain Linux servers across distributions including Ubuntu, Red Hat, and CentOS in production and staging environments.
• Perform advanced system performance tuning: CPU pinning, NUMA topology optimization, IRQ affinity, huge pages configuration, and kernel parameter tuning (sysctl).
• Manage OS-level scheduling policies, real-time priorities (SCHED_FIFO / SCHED_RR), and CPU isolation (isolcpus) to eliminate jitter.
• Implement system security hardening, patch management, firmware upgrades, and OS lifecycle management.
• Maintain system documentation, change logs, and runbooks for all infrastructure components.

HFT Infrastructure & Low-Latency Engineering

• Manage and optimize bare-metal HFT trading infrastructure with a relentless focus on determinism, performance, and latency reduction.
• Support HFT architecture and workflows including market data ingestion, order management systems (OMS), and execution infrastructure.
• Manage exchange connectivity, colocation environments, and co-location service provider relationships.
• Tune and monitor network stacks including TCP/UDP parameters, multicast group management, kernel bypass via DPDK and OpenOnload (Solarflare).
• Work with ultra-low latency network hardware: 10/25/40/100GbE NICs, including Solarflare and Mellanox/NVIDIA ConnectX adapters, and Cisco Nexus X25 SmartNICs (K3P-S).
• Monitor and continuously optimize end-to-end latency, jitter, and packet loss across the trading stack.

Data Centre & Network Operations

• Administer data centre Linux environments including rack management, cabling, power, and cooling coordination.
• Manage L2/L3 data centre networks including VLANs, spanning tree, BGP/OSPF routing, and multicast (PIM-SM) configurations.
• Configure and manage high-speed network switches (Cisco Nexus series) for ultra-low latency operation.
• Support market data distribution infrastructure and feed handlers connected to major exchanges.
• Ensure network high availability through redundant paths, failover configurations, and proactive capacity planning.

Storage, Monitoring & Automation

• Manage high-performance storage systems including NVMe SSDs, RAID configurations, and high-throughput storage arrays used for tick data and trading logs.
• Build and maintain monitoring and alerting infrastructure using Prometheus, Grafana, and custom latency dashboards to provide real-time visibility across all systems.
• Automate routine infrastructure tasks using Bash and Python scripting, including deployment automation, health checks, log rotation, and configuration management.
• Collaborate with development and quant teams to profile and troubleshoot latency anomalies, system bottlenecks, and infrastructure incidents.

REQUIRED SKILLS & TECHNICAL EXPERTISE

Core Linux Ubuntu, Red Hat, CentOS Linux internals & kernel tuning CPU pinning & NUMA optimization BIOS / hardware tuning

Networking TCP/IP, UDP, Multicast (PIM) 10/25/40/100GbE DPDK / OpenOnload / kernel bypass L2/L3, VLANs, BGP, OSPF

HFT & Hardware Solarflare / Mellanox NICs Cisco Nexus X25 SmartNIC (K3P-S) FPGA / ultra-low latency exposure NVMe / high-speed storage QUALIFICATIONS

Tooling & Automation Bash & Python scripting Prometheus & Grafana Colocation & exchange ops Data centre operations

Qualifications :

• Bachelor’s degree (BE/B.Tech) in Information Technology, Computer Science, Electronics, or a closely related engineering discipline.
• Linux certifications strongly preferred: RHCE (Red Hat Certified Engineer), RHCSA (Red Hat Certified System Administrator), or LPIC-1/LPIC-2 (Linux Professional Institute Certification).
• Networking certifications preferred: CCNA (Cisco Certified Network Associate) or CCNP (Cisco Certified Network Professional).

Pay: ₹1,500,000.00 – ₹2,500,000.00 per year

Work Location: In person