Full Stack Software Engineer

Citadel Securities; Hong Kong; On-site; HKD 900,000 - 1,500,000; Full time

Job summary

Citadel Securities, a technology-driven global market maker, seeks engineers to build next-generation pricing and trading workflows for Options. You will collaborate with traders and researchers to design and implement scalable, real-time systems across frontend and backend layers.

You will develop intuitive interfaces, robust distributed services, and production-grade APIs to enable research, pricing, execution, and risk management in fast-changing markets.

Qualifications

• Experience building full stack apps with modern frontend/backend technologies.
• Proficiency with TypeScript and React.
• Experience designing scalable backend services (C++ or Python).
• Experience building distributed systems and service-oriented architectures.
• Strong understanding of API design, async systems and event-driven architectures.
• Passion for intuitive user experiences and rapid prototyping.
• Strong analytical and problem-solving skills.
• Excellent communication and collaboration skills.

Responsibilities

• Define and build high-touch pricing and trading workflow applications for Options traders.
• Partner with traders, researchers, and leaders to design efficient workflows.
• Build full stack apps spanning frontend, backend, APIs, and distributed systems.
• Develop high-performance interfaces for real-time research, pricing, and trading.

Skills

Full stack development

TypeScript & React

C++ or Python backend

Distributed systems

API design / asynchronous systems

UX-focused design

Analytical problem solving

Communication & collaboration

Education

Bachelor's or Master's in CS

Job description

Location

Hong Kong, Sydney

Responsibilities

• Help define and build the next generation of high-touch pricing and trading workflow applications for Options traders.
• Partner directly with traders, quantitative researchers, and business leaders to design workflows that improve pricing, execution, and risk management.
• Build full stack applications spanning modern web frontends, backend services, APIs, and distributed systems.
• Develop intuitive, high-performance user interfaces that enable traders to research, monitor, price, and execute trades in real time.
• Design scalable backend services that support pricing, workflow orchestration, market data, and trading operations.
• Build next-generation click trading applications that allow traders to rapidly view market depth, manage orders, and execute complex trading strategies.
• Develop applications that enable traders to monitor, configure, and control distributed pricing and trading engines, providing real-time visibility into system health, trading state, and operational workflows.
• Build sophisticated risk visualization and decision-support tools that help traders understand portfolio risk, pricing behaviour, and execution opportunities in rapidly changing markets.
• Design workflow applications that seamlessly integrate pricing, execution, market data, and risk management into intuitive user experiences.
• Build systems that enable Citadel Securities to support new markets, exchanges, and option products as the global Options business continues to expand.
• Prototype new ideas rapidly and evolve them into robust, production-grade systems.
• Continuously improve the performance, scalability, stability, and usability of mission-critical trading applications.
• Collaborate across engineering, quantitative research, and trading teams to translate complex financial concepts into intuitive software.

Qualifications

• Strong experience building full stack applications using modern frontend and backend technologies.
• Proficiency with TypeScript and React.
• Experience designing scalable backend services using C++ or Python.
• Experience building distributed systems and service-oriented architectures.
• Strong understanding of API design, asynchronous systems, and event-driven architectures.
• Passion for creating intuitive user experiences through thoughtful interaction design and rapid prototyping.
• Strong analytical and problem-solving skills with the ability to solve open-ended technical challenges.
• Excellent communication and collaboration skills.
• Bachelor's or Master's degree in Computer Science or equivalent practical experience.

Preferred

• Experience working with trading systems, financial markets, or capital markets technology.
• Knowledge of options, derivatives, OTC products, or market structure.
• Experience building visualization tools for complex datasets.
• Experience designing software in close partnership with end users.

Why This Role Is Unique

• Build software that directly influences how Options traders price markets, execute trades, manage risk, and operate trading systems.
• Own products end-to-end across the full technology stack, from modern React frontends to distributed backend services.
• Work directly with traders and quantitative researchers to rapidly transform ideas into production systems with immediate business impact.
• Build technology that enables Citadel Securities to expand into new products, exchanges, and global markets.
• Solve challenging engineering problems involving distributed systems, low-latency applications, large-scale data processing, and sophisticated user experiences.

Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com.