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

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 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.

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 elevate clearly.
• Treats documentation and reproducibility as part of the work.

Caladan brings rationality to strange and unruly markets. We explore the frontier of finance, seek out new opportunities, and make markets more efficient and honest wherever we go. We support exchanges, tokens, and institutional investors with on-exchange liquidity, DeFi expertise, treasury solutions, and investments. Since 2017 we've been a pioneer in crypto market-making, powering over $170B in annual transactions across 1000+ assets.