Senior Software Engineer-Backend

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy.

Fintech at Toast operates one of the most critical portions of the Toast infrastructure: processing payments on behalf of our restaurants and ensuring that restaurants are paid in a timely manner. Payment processing is a key source of Toast’s revenue and also the lifeblood of our customers; we process millions of dollars in transactions per day.

We are seeking a Senior Software Engineer to join our Payments team to build out our unified payment processing solution. The platform offers a single, integrated service for payment acceptance across various channels and supports a configurable enterprise approach. It is designed to allow a build‑once, available‑to‑all strategy for both existing and emerging payment methods.

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• Design, build, and deliver features for Toast’s payments products.
  
• Develop and implement an automated test suite to ensure the code shipped to our customers meets the highest quality standards.
  
• Roll out features to customers, including monitoring for success.
  
• Collaborate with PM and UX on the definition and design of features.
  
• Partner with a wide array of teams across Toast.
  
• Work with experienced engineers to deliver design and code review.
  

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• 5+ years of experience in designing and implementing robust backend services.
  
• Proven ability to develop scalable and secure APIs that integrate with various internal and external systems.
  
• Knowledge of best practices in API lifecycle management, including versioning, documentation, and deprecation strategies.
  
• Demonstrated experience with microservices architecture and containerization technologies for enhanced scalability and maintainability.
  

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• Experience with DynamoDB or PostgreSQL.
  
• Proficiency in Kotlin (or Java and willingness to learn Kotlin) and Kotlin‑specific frameworks and libraries for building efficient backend solutions.
  
• Experience with modern data architectures (event sourcing, OLAP, ETL/ELT, streaming data).
  
• Experience designing payments APIs.
  
• Familiarity with PCI‑DSS.
  
• Familiarity with AI‑augmented development workflows and tools (e.g., Claude Code, GitHub Copilot, Codex, or similar).
  

We strive to provide competitive compensation and benefits programs that help 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 roles in the United States, it is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Toast is committed to creating an accessible and inclusive hiring process. xcfaprz As part of this commitment, we strive to provide reasonable accommodations for persons with disabilities to enable them to access the hiring process. If you need an accommodation to access the job application or interview process, please contact