C# Options Trading Developer The C# Options Trading Developer joins our client’s Futures & Options team to contribute to the analysis, design, and development of core trading systems. This role delivers scalable, high-performance solutions that support trading activities both regionally and globally. It offers the opportunity to engage with cross-functional teams and develop technologies that have a firm-wide impact.

About the Company Our client operates within the financial services sector, specialising in trading and risk management solutions. The company values technical excellence and innovation in delivering trading platforms and services.

Role Overview The C# Options Trading Developer will collaborate with technologists, traders, and quantitative researchers to develop and support business-critical trading systems. The role involves designing, implementing, and maintaining backend systems focusing on performance, scalability, and reliability. Success in this position will be measured by the seamless integration and robust operation of trading platforms in a fast-paced environment.

Key Skills & Experience

Lead the development of trading systems using C# with a focus on back-end performance and multi-threading

Manage full software development lifecycle from requirements gathering to deployment

Build and optimise scalable, high-performance trading infrastructure in a cloud environment

Collaborate with traders and quantitative researchers to translate business needs into technical solutions





Document technical specifications and ensure code quality through profiling and design best practices

Nice to Have

Experience with Microservices, Azure Service Fabric, Microsoft Orleans, Envoy Proxy, gRPC, Protobuf, React JS, Docker, Kubernetes, Octopus Deploy, and ELK Stack

Knowledge of trading, derivatives, risk, pricing, and Greeks

Key Responsibilities

Analyse, design, and develop business-critical trading systems using C#

Collaborate with cross-functional teams to deliver scalable, high-performance infrastructure

Optimise backend systems through profiling, design improvements, and multi-threading techniques

Maintain and support existing systems and implement new features as required

Engage in code reviews, testing, and deployment processes to ensure system robustness

Requirements

A bachelor’s degree (or higher) in a technical or related discipline

Proven track record in C# development with extensive knowledge of design, profiling, OO, multi-threading, and performance optimisationLI

Experience in Microservices and Cloud Technologies (preferably Azure Service Fabric, Microsoft Orleans, Envoy Proxy, gRPC, Protobuf, Docker, Kubernetes, Octopus Deploy, ELK Stack)

Strong background in developing business-critical systems from requirements to production

In office presence required in Hong Kong

Employment type: Asia Permanent

Duration: 2 weeks

Start date: 16/09/2026

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📌 C# Options Trading Developer (Sydney)
🏢 Gravitas Recruitment Group Hong Kong
📍 Sydney