Software Engineer, Growth

New York Office. Posted 9 days ago

The role

This person will design, develop, and maintain user-facing systems and internal tools for an online prediction market platform. They will build backend services, APIs, and data-driven systems to support user growth, engagement, and retention.

What you will do

Build, scale, and maintain backend services and APIs.
Own and operate notification and lifecycle engagement systems.
Design and operate data-driven systems for personalization, targeting, ranking, and user engagement.
Design and implement service APIs for web, mobile, and internal systems.
Build and operate event-driven backend workflows using message queues or streaming platforms.
Support growth experimentation through feature flags and A/B tests.
Collaborate with product management and frontend/mobile engineering.
Translate ambiguous product and business requirements into technical specifications.
Work with relational and NoSQL datastores for high-volume use cases.
Monitor, troubleshoot, and improve production systems.

Required qualifications

Bachelor’s Degree (or foreign equivalent) in Computer Science, Software Engineering, or a closely related field.
5 years of progressively, more responsible software development work experience.
5 years of experience developing, testing, and maintaining production software using Go (Golang), JavaScript, and Python.
5 years of experience designing, developing, and documenting service APIs (REST and/or RPC).
5 years of experience working with relational and NoSQL database systems such as PostgreSQL, MySQL, and MongoDB.
5 years of experience building, scaling, and operating high-performance backend services and distributed systems.
5 years of experience translating ambiguous or evolving product requirements into technical specifications.
5 years of experience implementing and supporting feature flags, A/B testing, or experimentation frameworks.

About the company

Kalshi is a prediction market company that allows people to trade on the outcome of any events. The company aims to build the largest financial market on the planet to bring more truth to the world through the power of markets.