Senior Software Engineer, Full Stack

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. Our integrations sync sales, payments, payroll and supplier data from Toast into accounting platforms accurately and on time, so owners can close their books with confidence. We're hiring a Senior Software Engineer (P3) to build full stack features for Toast's Accounting Integrations team in Chennai. The team sits in the Suppliers & Accounting division and connects Toast to the accounting software our customers run their books on. This is a high-growth moment for the team. We're extending our integrations to support Toast's expansion into Retail, and partnering across lines of business with the Fintech team to power in-house bookkeeping through Toast Books. You'll work with Java, Kotlin, React and AWS, and use AI tools every day to ship faster and better. A day in the life (Responsibilities) - Independently design and implement well-defined features across the full stack, from backend sync services to the merchant-facing setup and mapping UI, with minimal day-to-day guidance. - Build and maintain backend services in Java and Kotlin that sync financial data (sales, payments, payouts, invoices, journal entries) from Toast to external accounting platforms. - Build and consume RESTful APIs, and integrate with third-party accounting APIs and internal Toast systems, handling auth, rate limits, retries and idempotency. - Develop frontend features in React with TypeScript, focusing on usability and performance for restaurant and retail operators. - Deploy and run services on AWS, and use observability tools to monitor sync health and data accuracy. - Use AI-assisted development tools (e.g., Claude Code, Cursor, Devin) daily for coding, testing, debugging and documentation, and share what works with the team. - Help explore and ship AI-powered capabilities in the product, such as smarter account mapping or automated reconciliation suggestions. - Collaborate with Product, UX, QA and partner teams, including Fintech for Toast Books, to turn requirements into working software. - Write clean, maintainable, testable code aligned with Toast engineering standards, and take an active part in code reviews. - Troubleshoot production issues in owned areas, contribute to root-cause analysis, and support the team during critical phases and on-call. - Deliver on commitments with predictable cycle time, and communicate progress, risks and dependencies early. - Own components or features end-to-end within established architectural patterns, while growing toward larger system ownership. What you'll need to thrive (Requirements) - Bachelor's degree in Computer Science, Engineering or a related discipline - 6 to 9 years of experience in software or full stack development. - Strong backend experience in Java, with hands-on Kotlin experience or a clear willingness to become productive in it quickly. - Strong frontend experience with React (or Angular) and TypeScript/JavaScript. - Experience building and consuming RESTful APIs and integrating with third-party systems. - Hands-on experience with a cloud platform, preferably AWS (e.g., ECS/EKS, Lambda, SQS/SNS, S3, RDS/DynamoDB). - AI fluency: regular, practical use of AI coding assistants (e.g., Claude Code, Cursor, Copilot) in your workflow, and good judgment in reviewing and validating AI-generated code. - Working knowledge of SQL and NoSQL databases, including schema design and query tuning. - Familiarity with Gradle or Maven, Git and modern branching workflows. - Experience working in Agile/Scrum teams. - Strong problem-solving skills, attention to code quality and data correctness. - Clear written and verbal communication, including with distributed teams across time zones. - This is a hybrid role with 2 days per week in the Chennai office. What will help you standout (Nice to Have) - Experience integrating with accounting platforms such as QuickBooks Online, Xero, Sage Intacct, NetSuite or Restaurant365. - Understanding of accounting concepts: chart of accounts, journal entries, general ledger, reconciliation. - Experience building with LLM APIs, prompt design, retrieval (RAG) or agentic workflows in production. - Experience with event-driven architectures and messaging (Kafka, SQS/SNS) and resilient data sync patterns. - Experience with CI/CD pipelines, infrastructure as code (Terraform, CDK) and containerization (Docker, Kubernetes). - Background in fintech, payments, retail or POS domains. - Experience in a large-scale SaaS or product engineering environment. AI at Toast At Toast, one of our company values is that we're hungry to build and learn. We believe learning new AI tools empowers us to build for our customers faster, more independently, and with higher quality. We provide these tools across all disciplines, from Engineering and Product to Sales and Support, and are inspired by how our Toasters are already driving real value with them. The people who thrive here are those who embrace changes that let us build more for our customers; it’s a core part of our culture. Our Total Rewards Philosophy 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. #LI-HYBRID How Toast Uses AI in its Hiring Process Throughout the hiring process, our goal is to get to know you. We use AI tools to support our recruiters and interviewers with tasks like note-taking, summarization, and documentation of interviews to ensure they can be fully focused on your conversation. All hiring decisions are made by people. We ask that you complete interviews and assessments on your own, without real-time AI tools, recording, or transcription bots, unless we tell you otherwise in advance. To learn more: https://careers.toasttab.com/ai-in-hiring Our Approach to Hybrid Working We embrace a hybrid work model that fosters in-person collaboration while valuing individual needs. Our goal is to build a strong culture of connection as we work together to empower the hospitality community, regardless of location. Please visit the Locations page on our career site to learn more about our in-office expectations by region: https://careers.toasttab.com/locations-toast People Are the Secret Ingredient in Our Recipe for Success At Toast, our employees are our secret ingredient—when they thrive, we thrive. The restaurant industry brings together people with a wide range of backgrounds, experiences, and perspectives, and we value that same breadth at Toast. We strive to build a culture grounded in authenticity, respect, and humility, where every Toaster has a real opportunity to grow, contribute, and do their best work—raising the bar in delivering exceptional experiences for our customers and each other. Apply today! Toast is committed to creating an accessible and inclusive hiring process. 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 candidateaccommodations@toasttab.com. ------ For 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.