Principal Software Engineer, Android

Toast is driven by building the restaurant platform that helps restaurants adapt, take control, and get back to what they do best: building the businesses they love.

Toast is empowering restaurants to build better businesses. We’re a rapidly growing company that’s revolutionizing the restaurant industry by providing a comprehensive, cloud-based platform that combines point of sale, guest engagement, operations, and team management on a single Android tablet. We’re passionate about helping restaurants succeed.

About the team:

The Card Readers team is at the heart of Toast's payment processing capabilities. We develop and maintain seamless integrations with leading card reader vendors, ensuring reliable and secure payment experiences for our restaurant customers. You'll be working on core components of the Toast platform, impacting thousands of businesses daily.

Bready* to make a change? 

As a Principal Android Engineer on the Card Readers team, you will be a technical leader responsible for designing, developing, and maintaining our Android-based payment integrations. You will work closely with hardware vendors, Android OS engineers, 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 Android development, coupled with a deep understanding of payment systems, will be crucial in delivering robust and scalable solutions.

About this roll*: (Responsibilities)

• Architect, design, and develop robust, high-performance Android applications using Kotlin.
• Lead technical discussions and decisions on Android best practices, performance optimizations, and security.
• Collaborate with cross-functional teams (backend, product, UX/UI, QA) to deliver seamless payment experiences.
• Optimize mobile payment flows for security, speed, and reliability.
• Shape the face of development at Toast by helping to balance building maintainable software for long term success, with the need to deliver value to customers in an iterative fashion.
• Ensure compliance with PCI-DSS, security best practices, and other financial industry standards.
• Mentor and guide junior engineers, conduct code reviews, and drive best practices in mobile development.
• Troubleshoot and resolve complex technical issues, ensuring high availability and performance.
• Participate in agile development processes, including sprint planning, daily stand-ups, and retrospectives.
• Stay up to date with emerging Android technologies, frameworks, and trends.

Do you have the right ingredients*? (Requirements)

• Strong proficiency in Kotlin and modern Android frameworks (Jetpack, Coroutines, Flow).
• Deep understanding of Android architecture components, MVVM, and Clean Architecture.
• Strong knowledge of Android security best practices and secure data storage.
• Familiarity with mobile payment processing, tokenization, NFC, and EMV standards (a plus).
• Experience working with third-party payment gateways, in-app purchases, or POS integrations (a plus).
• Excellent communication and collaboration skills, with the ability to work effectively with cross-functional teams.
• Strong problem-solving skills and ability to work in a fast-paced, agile environment.

Special Sauce: (non-essential skills, nice to have)

• Prior experience with distributed systems and microservices
• Experience with EMV Payments or Kernel

This is a hybrid role and you will be expected to be in office 2 days a week.

Our Spread* of Total Rewards
We strive to provide competitive compensation and benefits programs that help to attract, retain, and motivate the best and brightest people in our industry. Our total rewards package goes beyond great earnings potential and provides the means to a healthy lifestyle with the flexibility to meet Toasters’ changing needs. Learn more about our benefits at https://careers.toasttab.com/toast-benefits.

*Bread puns encouraged but not required