Senior Trading Systems Software Engineer (Python React FIX Fidessa)

Role: Software Engineer

Working hours: Normal 8hrs expectation for 07:00am start twice a week local time

Work Location: 100% on site in Central Sydney

Duration: 1 year possible extensions

Job Purpose:

This role designs builds and supports the trading and analytics applications the desk depends on daily. We build our own tooling we own it end-to-end and we hold it to the same standard as any production trading system. You will work directly with traders and operations staff ship real software and apply genuine engineering discipline - including structured AI-assisted development as a first-class part of the workflow.

Key Responsibilities:

Design build test and support Python back-end services and React front-end applications covering order flow position and risk views trade analytics and reporting - modelled explicitly around business domain concepts: OrderRouter RiskGate MarketDataFeed Strategy OMS.

Maintain and extend FIX connectivity and order routing integrations across APAC venues; support Fidessa/Triton configuration session management and user troubleshooting.

Design and own PostgreSQL and MSSQL schemas that accurately reflect trading domain models; write and tune queries supporting real-time and end-of-day analytics workflows; coordinate larger database work with the US team.

Translate trader and operations requirements into clear specifications walk stakeholders through design decisions and communicate incident impact and resolution in plain language.

Apply a structured TDD cycle without exception: spec sign-off implementation plan sign-off automated tests agreed and written before code peer review of all output (human or LLM-generated) and continuous test execution covering functional correctness non-functional behavior (latency throughput resilience) and code quality gates.

Use Copilot and LLMs as a disciplined co-author operating inside that defined cycle-spec sign off implement test review repeat. Unstructured vibe coding is not practiced here and will not be accepted in peer review.

Required Skills

Experience in systems engineering for front office & operations trading technology within cash equities

Production Python: fully typed mypy-strict domain-modelled Pythonic; dataclasses Protocols precise exception handling.

Production React/TypeScript: strict mode no any clean async patterns cohesive component design.

FIX protocol: session lifecycle order state management drop copy reconciliation venue-side troubleshooting.

Fidessa: hands-on support and integration experience in a live trading environment.

PostgreSQL and MSSQL: relational schema design for trading workflows query optimization operational support.

Genuine TDD discipline: unit-first deterministic fixtures meaningful assertions coverage on critical paths. Demonstrable in a pair session not just on a CV.

Structured LLM co-design practice: the candidate must be able to articulate their workflow clearly and demonstrate it live.

Preferred Skills

Cash equities microstructure: tick sizes lot rules auction mechanics

CI/CD pipelines (Jenkins or GitHub Actions) structured observability (logging metrics tracing) Docker/Kubernetes."

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