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We are building a next-generation financial ecosystem (think NYSE or CME from scratch). As part of Kalshi, you will work on various platforms, including core exchange, clearinghouse, API infrastructure, connectivity to brokers and market makers, and others. We are a small team, which means your responsibilities scale very rapidly, and your contributions are clear and visible, not marginal. There is still a lot of green field at Kalshi and a low of it (including entire systems) can be yours.
Job Responsibility:
Order matching and trade execution algorithms and data structures
High-performance data feeds and trading APIs for clients
High guarantee and availability clearing systems, including margining, collateral management, and banking integrations
Lead integrations with external market makers, brokers, and hedge funds
Stress test large-scale critical systems to ensure their robustness and maintainability
Optimize database access patterns and internal algorithms to improve the performance of our different services
Design new market structures (e.g., non-binary markets, scalars, futures, etc.)
Be close to the customer (define features, ship products, iterate)!
Ship fast and with high quality
Make decisions: we give a lot of flexibility, which also means no spoon-feeding
Requirements:
4+ years of software engineering experience
Experience planning and leading large projects with long-term impact on a single system or team
Strong technical grasp and ability to tackle complex engineering problems that deliver results
Solid understanding of relational databases and transactions
Familiar with writing highly concurrent systems
History of creating and applying new processes and tooling to increase engineering efficiency
Excellent judgment on task prioritizations
Growth mindset, with a high slope and eagerness to lean
Love of the craft: you genuinely care and put your all into your work
Can ship at incredible speed
Nice to have:
Experience building financial systems, FIX API, clearing infrastructure, broker connectivity, etc.