Senior Software Engineer – Post-Trade Systems (Python/C++)

Old Mission is seeking a Senior Software Engineer to build reliable systems at scale for post-trade operations. You will coordinate across inputs, outputs, and latency requirements, bringing proven Python and C++ expertise to a distributed system supporting global trading from Chicago. You will work with Linux, relational databases, and FIX, contributing to a fast-paced, collaborative team with strong problem-solving skills. Competitive salary and comprehensive benefits offered.