Principal Engineer, Toast

• Demonstrated ability to lead large, cross-team platform initiatives, setting technical direction beyond a single team or service
• Expert-level proficiency in Kotlin, Java, and/or JVM languages, including high-scale successes with multi-threading/concurrency (deep experience with coroutines a plus)
• Fluency with card payments, particularly EMV standards and technology
• Experience working in a large (Android) project/codebase, architecting for clear domain boundaries, modularity, reusability, and testability
• Track record of complex and robust SDK integrations completed successfully
• Expertise in security and key management best practices
• Experience designing public APIs for hassle-free consumption
• Expertise in observability, monitoring, and alerting for complex user-device interactions
• Strong skills in mentoring a team of developers on best practices
• Openness and enthusiasm for AI tooling to enhance R&D productivity
• Excellent communication, collaboration, and problem-solving skills that lead others by example

Desirable

• As a Principal Engineer on the Card Readers team, you will be a technical leader responsible for designing, developing, and maintaining our POS payment integrations
• You will work closely with hardware SDKs, the core POS application team, and other cross-functional stakeholders to drive technical decisions and define the target architecture for our payment solutions. Your expertise in high-throughput asynchronous JVM solutions, coupled with a deep understanding of mission-critical transactional processing, will be crucial in delivering robust and scalable solutions
• Develop and execute technical strategies to solve complex business challenges, leveraging data and customer insights to prioritize impactful improvements
• Establish guiding technical and delivery principles that influence engineering practices across the broader engineering organization
• Architect, design, and develop robust, high-performance applications using Kotlin, optimized for security, speed, availability, and reliability
• Raise the bar as a high-throughput, hands-on code contributor modeling high standards
• Lead agile development processes, including sprint planning, daily stand-ups, and retrospectives
• Mentor and guide engineers, fostering a culture of continuous improvement, inclusivity, and engineering excellence
• Build and maintain strong partnerships across lines of business, aligning technical solutions with strategic objectives
• Leverage cutting edge AI tools to enhance your development workflow, improve velocity, and help pioneer new approaches to building - contributing to a culture of innovation and productivity across the team