Senior Trading Systems Software Engineer (Python / React / FIX / Fidessa)
Sydney, Australia | Posted on 26/08/2026
Assigned Recruiter(s) Sri Ram Harsha Pillutla
Initial Contract Duration 12 months
Job Opening Status Open
Location NSW
Security Clearance None
City Sydney
Country Australia
Postal Code ****
Job Description
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, accurate exception handling.
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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📌 Senior Trading Systems Software Engineer (Python / React / Fix / Fidessa) (New South Wales)
🏢 Indigitise
📍 New South Wales