C# Developer (Post Trade Technology) - HK

Susquehanna International Group is seeking a Software Engineer to join our Post Trade Technology team, who are responsible for processing and storing all trading-related activities across the APAC region. This part of the team builds applications used to automate many of the post trade processes, and provides robust systems that comply with all financial, regulatory and accounting requirements across our various APAC regional locations. 

What you can expect from us: 

• Real Impact: By integrating sophisticated coding techniques with innovative engineering ideas, we design and optimize systems that process large volumes of data while still ensuring high performance and stability 

• Opportunity: In order to support the exponential growth of the business along with the industry changes, there are several strategic projects being initiated in Hong Kong. As a senior member of the team, you will have the opportunity to shape these and drive their delivery.  

• APAC Collaboration: You will work closely with the wider Post Trade Technology team members, in Hong Kong and Sydney. You will collaborate with the wider Technology team in the APAC region and globally. In addition, you will be engaging with the Business (Trading, Ops, and Compliance etc) on delivering multiple strategic projects 

• Growth: We’re looking for people who are naturally curious, relentless, and problem solvers. You will have the desire to continuously innovate, learn, and grow. As a senior member of the team, this attitude will be essential for your personal growth, and the growth of the team around you. 

• Benefits: SIG offers a wide array of competitive employee perks and benefits. 

• 7+ years of professional software development experience delivering enterprise‑grade solutions using C#, SQL, PL/SQL, and Oracle in complex, high‑availability environments 

• Expert‑level understanding of Object‑Oriented Programming and software design principles, including SOLID, common design patterns, and approaches for building scalable, maintainable systems 

• Proven ability to lead the design, development, and implementation of large‑scale client/server applications, providing architectural direction and ensuring alignment with best practices 

• Strong experience in application and database architecture, including schema design, performance optimization, complex query development, and data integrity management 

• Demonstrated capability to own systems and features end‑to‑end, from requirements analysis and technical design through implementation, deployment, and ongoing support 

• Excellent communication skills, with the ability to clearly articulate technical concepts to both technical and non‑technical stakeholders, facilitate technical discussions, and influence architectural and design decisions 

• Experience mentoring junior developers, conducting constructive code reviews, and promoting coding standards, knowledge sharing, and continuous improvement 

• Proven track record of collaborating effectively with product owners, business analysts, and cross‑functional teams to translate business needs into robust technical solutions 

• Comfortable working within Agile and enterprise SDLC environments, balancing delivery deadlines, technical debt, and long‑term system sustainability 

About Susquehanna: 

SIG is a global quantitative trading firm founded by a group of friends who share a passion for game theory and probabilistic thinking. We have incorporated this approach into our culture, where you will find relentless problem solvers within each of our core disciplines: Trading, Technology, and Quantitative Research. From offices around the world, our employees collaborate to make optimal decisions and are driven by the desire to achieve winning results together.  

 
What we do: 

We are experts in trading essentially all listed financial products and asset classes, with a focus on derivatives trading. Through market making and market taking, we handle millions of trading transactions around the world every day, providing liquidity and ensuring competitive prices for buyers and sellers. While our presence in the market is broad, our trading desks are highly specialized, allowing for a deep understanding of unique drivers of each asset class. 

Equal Opportunity Statement 

We encourage applications from candidates from all backgrounds, and we welcome requests for reasonable adjustments during the recruitment process to ensure that you can best demonstrate your abilities.  

SIG does not accept unsolicited resumes from recruiters or search firms. Any resume or referral submitted in the absence of a signed agreement will become the property of SIG and no fee will be paid. 

If you're a recruiting agency and want to partner with us, please reach out to recruiting@sig.com. Any resume or referral submitted in the absence of a signed agreement will not be eligible for an agency fee.