For Candidates · Career Paths
What Does a Software and Systems Engineer Do in Trading, and How Do You Get In?
A software engineer working on low-latency trading systems has a very different job from someone building risk platforms or internal developer tools. Yet both roles can sit under the same job title.
For engineers considering a move into trading, understanding these differences is a useful starting point. The technical requirements, interview processes and day-to-day work depend on the systems you’re joining to build.
What does software and systems engineering mean at a trading firm?
The field covers several distinct areas, including core trading and execution systems, post-trade and risk technology, internal developer tooling and market data infrastructure.
Each comes with different technical challenges. An engineer working on execution systems might focus on latency and throughput, while someone developing risk platforms may work on data processing, reliability and system scalability.
Understanding which area interests you will help you identify the roles that match your experience.
What technical skills matter most?
Strong systems fundamentals, particularly memory management, concurrency and performance-critical engineering.
C++ remains a common foundation, although the stack varies by firm and team. Interviewers may test how code behaves under real performance pressure, including cache behavior, thread contention and memory allocation.
Being able to explain how you’ve solved these problems in practice matters more than listing languages and frameworks.
Do I need financial markets experience to break into software and systems engineering?
No. Strong systems engineering experience is often more important than previous exposure to financial markets.
Engineers can move into trading from technology companies, hardware engineering or academic research. Market-specific knowledge can typically be developed on the job.
How is interview preparation different from a typical tech company process?
Expect questions that go beyond standard algorithm exercises.
Depending on the role, you may be asked how a data structure behaves under memory pressure, how virtual functions are implemented at the compiler level or how concurrency affects performance.
Algorithm practice still has its place, but preparation should also cover the systems knowledge needed to explain what your code is doing and why.
What does the work look like once you’re in the role?
The work varies considerably between trading systems, risk technology, developer tooling and market data infrastructure.
In some teams, code can reach production quickly, with changes affecting live trading systems and measurable performance outcomes.
That creates a direct feedback loop, particularly for engineers working on execution and other performance-critical systems.
What should I focus on if I want to move into software and systems engineering?
Start by identifying the area of engineering you want to pursue, then build the technical depth it requires.
For performance-critical roles, practical experience with C++, memory management, concurrency and systems optimization can be particularly valuable. Work on projects that demonstrate those skills, and be ready to explain how you designed, tested and improved the systems you’ve built.
