Staff Backend Software Engineer

We are seeking a Staff Software Engineer to join our Payments team to build out our unified payment processing solution. This 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.

Responsibilities

• Guide and contribute to the development of services providing supporting and core functionality within and around this payment processing solution.
• Plan, design, build, and deliver features for Toast’s payments products.
• Plan, develop, and implement best practices such as automated test suites to ensure the code shipped to our customers meets the highest quality standards.
• Roll — pun intended! — features out to customers, including monitoring for success.
• Collaborate with our PM (and UX) on the definition and design of features.
• Collaborate and partner with a wide array of teams across Toast to spread knowledge inter- and intra-team.
• Lead and work with experienced engineers to deliver design and code review.

Benefits

• Peer and company recognition programs
• Unlimited Vacation
• Sabbatical opportunity after five years
• Professional Development Reimbursement Program
• Commitment to Employee Wellness through resources such as a quarterly Wellness Stipend
• Various peer and company recognition programs
• 401(k) and matching
• Medical, Dental, & Vision Coverage
• Mental Health Benefits
• Subsidized backup childcare

Qualifications

• Ability to step into a technical leadership role on the team, guiding/coaching/mentor more junior engineers on best practices in architecture, design, coding, testing, deployment, etc.
• Demonstrated experience with microservices architecture and containerization technologies for enhanced scalability and maintainability.
• 8+ years of experience in designing and implementing robust backend services.
• Proven ability to design and develop scalable and secure APIs that integrate with various internal/external systems.
• Applied knowledge of best practices in API lifecycle management, including versioning, documentation, and deprecation strategies, with the ability to share this amongst the team and peers.
• Demonstrated proficiency with DynamoDB or PostgreSQL.
• Proficiency in Kotlin (or Java and willing 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).