Senior/Staff Backend Engineer

Casap Backend Engineer Casap is a Series A startup that has raised over $30M from Emergence, Lightspeed, and Primary Ventures. Based in San Francisco, the company was founded by product leaders from Robinhood and Chime. We are on a mission to change the way banks operate by automating disputes and fighting friendly fraud. People love what we've built, from everyday users to the biggest names in finance. Casap is looking for talented Backend Engineers (~10) in San Francisco excited to supercharge how banks operate with a rapidly scaling product at the forefront of automation and Artificial Intelligence. Responsibilities Develop and maintain reliable backend systems, integrating them with credit card, banking, and merchant platforms for comprehensive workflow chargeback management. Scale and generalize the system for growth, ensuring it is highly configurable and flexible to reduce the time to go live and support a broad range of use cases. Architect and develop robust architectural patterns for microservices. Design and implement core frameworks and libraries for various backend services, promoting code reuse and maintainability. Take ownership of upgrading coding practices, CI/CD pipelines, deployed systems, backend programming languages, and third-party dependencies to enhance system performance and security. Proactively identify areas for improvement in our platform's infrastructure and systems, implementing optimizations that enhance operational efficiency and product quality. Own the end-to-end development and deployment of key features, including decision-making around technology stack and system design to ensure optimal implementation. Qualifications Minimum of 6+ years of experience in software development, with at least 2 years focused on using Go or Java in production environments. Demonstrated experience working on platform teams and contributing significantly to system architecture. Led an end-to-end implementation of a key product feature or re-architecture/upgrading of a key platform service. Excellent problem-solving skills with a strong understanding of fundamentals, algorithms, data structures, and industry design patterns. Experience mentoring junior team members and leading project teams as the sole tech lead. Strong communication skills and ability to work effectively in a collaborative team environment.

Created: 2026-03-04