Low-Latency Trading Platform Engineer

Caladan Group; Kraków; On-site; PLN 180,000 - 280,000; Full time

Job summary

Caladan Group is seeking a Trading Platform Engineer to keep our order systems fast, observable, and dependable. You will build tooling, own latency paths end-to-end, and respond to production issues as the first line of defense.

You will develop features for trading platform tools, implement robust monitoring, and participate in on-call rotations. Strong Linux performance tuning and scripting skills are essential, with exposure to Python/Go/C# codebases and observability suites.

Qualifications

• Experience building or supporting low-latency trading infrastructure in a Linux environment.
• Hands-on with kernel bypass (DPDK or similar), NUMA and CPU affinity, network stack and buffer sizing.
• Strong automation and scripting skills (Python, Bash or Go), and comfortable with modern Python or C# codebases.
• Experience with observability and alerting tooling (Prometheus, Grafana or equivalent).
• Calm and methodical under production pressure — able to own an incident and elevate clearly.
• Documentation and reproducibility are part of the work.

Responsibilities

• Develop new features and improvements for trading platform tools.
• Build the monitoring layer for essential trading services, from health dashboards to alerting on time-critical paths.
• Provide support during production incidents: verify compute, connectivity, market data, revert to last known good configuration, triage and elevate to service owners where needed, and fix trading platform tooling directly.
• Own routine maintenance of essential services (version rollouts, configuration changes) and build the tooling that automates it.
• Tune the end-to-end latency path, including kernel-bypass networking.
• Establish and maintain latency baselines, so regressions are surfaced by monitoring before they reach the desk.
• This role includes participation in an on-call rota shared across the team.

Skills

Low-latency trading

Linux tuning

Automation scripting

Observability

Tools

Python

Go

Bash

C#

Prometheus

Grafana

Job description

Caladan Group is seeking a Trading Platform Engineer to keep our order systems fast, observable, and dependable. You will build tooling, own latency paths end-to-end, and respond to production issues as the first line of defense.

You will develop features for trading platform tools, implement robust monitoring, and participate in on-call rotations. Strong Linux performance tuning and scripting skills are essential, with exposure to Python/Go/C# codebases and observability suites.