Principal Software Engineer

About the job

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 helps restaurants adapt, take control, and get back to what they do best : building the businesses they love. Toast connects employees, operations, and guests on a reliable, easy-to-use platform so restaurateurs can stay one step ahead of a rapidly evolving hospitality market.

We are hiring for the 'International Payments' team - the driving force behind Toast's global expansion. We architect and scale the core payment engine powering our growth in new markets around the world.

As a Principal-Engineer/Architect, you will spearhead technical strategy and architect scalable designs for Toast’s largest restaurant brands. Partnering with product, business & engineering stakeholders, you will define the technological roadmap empowering customers to unleash the full capability of Toast. You will collaborate with engineering leaders and cross-functional teams across the organization to execute robust, mission-critical solutions seamlessly integrated with external systems.

You will drive the evolution of our International Payments platform, expanding Toast’s global footprint with best-in-class customer-facing Fintech products and foundational capabilities.

A day in the life (Responsibilities)

- Gain deep expertise in Toast’s payments ecosystem to enable reliable, seamless payment acceptance and processing across our fintech portfolio.

- Architect resilient, high-scale, mission-critical payment platform components.

- Design, build, deploy, and maintain highly resilient and scalable features across Toast’s International line-of-products.

- Lead complex initiatives that would span multiple teams & systems.

- Collaborate with stakeholders across the organization - including PMs, SEs, QA, and UX - to help your teams get stuff done and deliver solutions that maximize value.

- Drive high-quality team output and ensure that the team makes solid technical decisions.

- Serve as a steward of an exceptional culture, encompassing both technical excellence and people‑centric values.

- Champion best practices for SDLC & CICD life-cycles.

- Champion the use of AI tools and practices to accelerate development, improve team velocity, and pioneer new ways of building - setting the bar for what it means to be an AI-first engineering organization.

- Mentor & coach engineers within the Fintech organisation.

- Hire and develop new team members, helping build a diverse team that wins together.

What you'll need to thrive (Requirements)

- Strong technologist with 12+ years experience defining and implementing high scale SaaS solutions.

- Have strong understanding & hands-on experience of building fault-tolerant, highly-scalable & secure distributed systems.

- Proficiency with sql/nosql databases, strong understanding of distributed datastores and knowledge of when to use what.

- Strong foundations in data structures & algorithms.

- Strong interpersonal skills and a proven track record of building partnerships across engineering, product, customer success, and other stakeholders.

- Experience shipping iterative value using agile or lean software delivery methods.

- Experience of tackling complex and ambiguous problems, communicate clearly with others to solve the problem, and share knowledge to help the whole team succeed

- Experience building payments & Fintech products, with at least 10+ years in the payments industry

Our Tech Stack

- Backend services which follow a microservice architecture written using Kotlin, Java and DropWizard

- Event driven messaging & streaming using Apache Pulsar & RabbitMQ.

- Apache Camel for implementing Enterprise Integration Pattern.

- React & ES6 based Frontend SPAs leveraging Tailwind, GraphQL and Storybook.

- DynamoDb & Postgres as core persistence data-storage layers.

- Datadog & Sentry for system and application metric and monitoring.

- Splunk for log aggregation.

- FireHydrant for alerting.

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 . 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 .

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