Trading Systems Engineer (Affiliated Trading)

About the role

Kalshi Trading is an affiliated trading entity that operates across all different categories on Kalshi. We are looking for Backend Engineers who can build and maintain the infrastructure underlying our trading operations. The rest of what the role looks like is up to you — a big part of our approach is that you get to chart your path as we grow and evolve. You will have a lot of influence in shaping what both your role and the activity of Kalshi Trading look like as we grow, with a lot of green field to conquer.

Responsibilities

• Build and maintain the infrastructure underlying trading operations
• Design, develop, and optimize backend systems for high performance and reliability
• Write concurrent, robust code and maintain relational databases (e.g., Postgres)
• Collaborate with cross-functional teams to support and scale trading systems

Requirements

• At least 3 years of professional experience as a backend engineer
• Direct experience building trading systems, including order management
• Experience building robust, high-performance event-driven systems and APIs
• Experience writing concurrent code
• Very comfortable with relational databases (e.g., Postgres)
• Familiarity with the AWS stack (especially RDS and ECS)
• Proficiency in one of: Golang, Rust, C++

Qualifications

• Familiarity with stream processing (Kafka)
• Familiarity with frontend development
• Experience with machine learning, neural networks, or generative AI including LLMs
• Experience trading on Kalshi or other prediction markets

Culture

Meritocracy is at our core, and we value people who take ownership and figure (usually hard) things out. We dream big, love our craft deeply, and are proud of what we put out in the world. We are committed to our vision of building something big — but also useful: a product that brings more truth through the power of markets. Kalshians are Kalshi’s most important asset; we pick Kalshians carefully, so we trust them fully on day 1.