Senior Software Engineer, Backend — Toast International

Canada Hybrid (Ontario) · Remote · CAD 115,000-165,000 · 5+ years experience · Posted Sep 29, 2026

At a glance

As a Senior Backend Engineer on the Toast International team, you will engineer the platform powering guest reservations, dynamic floor management, and table operations globally.
You will lead the design and execution of core backend services, scalable systems, robust integrations, and data processing pipelines.
You will collaborate closely with international engineering teams, product managers, and designers to support full-service restaurants worldwide.

Architect, implement, and scale distributed backend microservices (Java / Kotlin / AWS) powering reservations and guest management.
Build core transactional and payment capabilities for the platform.
Design robust integrations with third-party aggregators and partners and two-way POS synchronization.
Implement tiering, entitlements, and usage metering services across freemium waitlists and premium subscription tiers.
Partner cross-operatively with Mobile, Web/Frontend, Product Management, and UX to deliver seamless end-to-end features.
Drive high standards of code quality, observability, test automation, and operational excellence.
Mentor team members, participate in technical design reviews, and leverage modern AI development workflows to accelerate velocity and code quality.

5+ years of software engineering experience building scalable, distributed backend microservices in production.
Deep proficiency in Java or Kotlin, relational and NoSQL databases, and event-driven architectures.
Proven experience designing clean, versioned REST / GraphQL APIs and handling asynchronous workflows at scale.
Experience integrating payment workflows or compliance-sensitive systems.
Strong focus on software reliability, schema design, latency optimization, and distributed systems resilience.
Passion for collaborating across distributed global time zones with a single-threaded ownership mindset.