Trading Systems Engineer — Live Markets, Low Latency

Posley; Hong Kong; On-site; HKD 600,000 - 800,000; Full time

Job summary

Posley is a quantitative investment firm focused on opportunities across traditional and alternative markets. We study how price, funding, liquidity, market structure and execution interact across markets, building in-house systems used for live trading.

We are looking for a strong software engineer to build and improve our trading and execution infrastructure, touching exchange connectivity, order management, monitoring and production systems with emphasis on correctness and edge cases.

Qualifications

• Strong software engineering fundamentals.

Responsibilities

• Develop exchange connectivity through WebSocket / REST APIs.
• Improve order, position and account state management.
• Handle execution edge cases, failures, retries and reconciliation.
• Build monitoring and safeguards for live trading systems.
• Improve latency, reliability and operational resilience.
• Investigate discrepancies in positions, balances, fills, fees and P&L.
• Support deployment, cloud infrastructure and DevOps where needed.
• Work directly with quantitative researchers to bring strategies into production.

Skills

Software engineering

Distributed systems

Asynchronous design

Ownership

Trading interest

AI-assisted coding

Tools

WebSocket/REST APIs

Python

TypeScript/Node.js

Redis

Time-series DB

Cloud/DevOps

Job description

Posley is a quantitative investment firm focused on opportunities across traditional and alternative markets. We study how price, funding, liquidity, market structure and execution interact across markets, building in-house systems used for live trading.

We are looking for a strong software engineer to build and improve our trading and execution infrastructure, touching exchange connectivity, order management, monitoring and production systems with emphasis on correctness and edge cases.