Trading Platform Engineer

Caladan; Województwo małopolskie; On-site; PLN 180,000 - 280,000; Full time

Job summary

Caladan is seeking a Trading Platform Engineer to keep orders-to-market systems fast, observable, and dependable. You will build tooling for the trading platform, own the latency path end to end, and act as the first line of response during production issues.

Key focuses include developing new features, building a robust monitoring layer, and supporting incidents with systematic triage and fixes. You will also maintain routine service configurations and automate deployments in a Linux

Qualifications

• Experience building or supporting low-latency trading infrastructure in a Linux environment.
• Hands-on with kernel bypass networking and performance tuning, including NUMA and CPU affinity.
• Strong automation and scripting skills (Python, Bash or Go) and comfort with modern codebases.
• Experience with observability and alerting tooling (Prometheus, Grafana) and thoughtful alert design.

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 on-call support during production incidents and triage to service owners when needed.
• Own routine maintenance of essential services (version rollouts, configuration changes).
• Tune end-to-end latency paths, including kernel-bypass networking.
• Establish and maintain latency baselines to surface regressions before they reach the desk.

Skills

Low-latency trading

Linux

Performance tuning

Automation

Scripting

Observability

Tools

Prometheus

Grafana

DPDK

NUMA

CPU affinity

Python

Bash

Go

C#

Job description

As a Trading Platform Engineer you'll keep the systems that carry our orders to market fast, observable and dependable. You'll build the tooling the trading platform runs on, own the latency path end to end, and work alongside the desk as the first line of response when production issues arise.

What you'll be doing

• Develop new features and improvements for our 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 escalation 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.

The Ideal Candidate

• Experience building or supporting low-latency trading infrastructure in a Linux environment, at a prop trading firm, hedge fund, exchange or crypto trading firm.
• Hands‑on with performance tuning below the application layer: 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 working with modern Python or C# codebases.
• Experience with observability and alerting tooling (Prometheus, Grafana or equivalent), and a considered approach to alert design.
• Calm and methodical under production pressure — able to own an incident and escal…
• Treats documentation and reproducibility as part of the work.