Principal Software Engineer, International Integrations

Location(s): Canada (Remote - East Coast preferred) Bready* to make a change? 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. Toast is driven to build a platform that helps our customers adapt, take control, and get back to what they do best: building the businesses they love. International expansion is a critical growth engine for Toast's future. Outside the US, we currently operate in Canada, UK, Ireland, and Australia and are actively growing our market share. Integration partnerships are a key part of our strategy to ensure that restaurants of all sizes can retain the parts of their tech stack outside of the Toast platform. This role is for a current vacancy. Who We Are Supporting customers software partners is a key part of international expansion strategy, and the advent of AI powered coding tools provided the opportunity to significantly reduce the development effort required to integrate with a partner. We are looking for a principal engineer to lead the development of this new way of integrating partners, while also providing additional technical leadership across our International expansion efforts. This is an exciting opportunity to develop new AI powered development systems that will provide direct impact for our customers. A day in the life (Responsibilities) • 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. • Lead fellow developers, product managers, designers, and user researchers to build a strong tech infrastructure that enables scalably integration of key customer software partners. • Architect, create and maintain an AI harness for the rapid integration and maintenance of partners with Toast’s systems • Define and drive technical strategy for problems that affect our International expansion efforts • Mentor developers across multiple teams through code-pairing and detailed code, architecture, and project reviews • Champion best practices for development, deployment and quality life cycles • 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. • Document solution design, write & review code, test and rollout solutions to production, capturing & actioning customer feedback to iteratively enhance customer experience • Collaborate with UX, Product Management, QA and partner engineering teams to build best-in-class solutions in a complex and fast-moving environment Our Tech Stack • Backend: Java and Kotlin-based backend services. • Frontend: React SPAs leveraging Tailwind, GraphQL, and Storybook. • Mobile/Hardware: Android app built in Java & Kotlin running in the restaurant. • Persistence/Databases: PostgreSQL and DynamoDB. • Messaging & Integration: Apache Pulsar, Apache Camel, and RabbitMQ for message-based integrations. • Plus many more technologies that help us build a top-class platform. What you'll need to thrive (Requirements) • 10+ years of experience designing, building, and operating highly scalable, mission-critical distributed systems and SaaS products (ideally AWS-hosted). • Proven track record of leading complex technical initiatives and delivering robust software architecture from design to production. • Strong enthusiasm for agentic development practices, LLM integration, and modern software paradigms. • Balanced expertise: Ability to design high-level technical solutions on a whiteboard while remaining deeply connected to code-level execution and system performance. • Effective communication: Ability to articulate complex technical ideas clearly to both technical peers and product leadership. Nice to Haves • Experience building development harnesses that leverage LLMs or autonomous agents • Hands-on experience with enterprise integration frameworks (e.g., Apache Camel) or event-driven messaging systems (e.g., Apache Pulsar). • Experience establishing robust CI/CD, testing, and deployment strategies for complex systems. • Domain knowledge in 3rd party system integrations or restaurant operations. 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. The base salary range for this role is listed below. The starting salary will be determined based on skills, experience, and geographic location. In addition to base salary, our total rewards components include cash compensation (overtime, bonus/commissions if eligible), equity, and benefits. Pay Range $169,000—$270,000 CAD 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 ma