Toast: Senior Principal Software Engineer - Payments
401 Park Drive
Boston, MA 02215


Employee Testimonials

Maura Grimes Toast
Edmund Korley Toast
Kendal Austin Toast

Office Tour Photos

Were not your traditional tech company and we dont aim to be. Going against the grain is in our DNA. Building a revolutionary product begins with revolutionary thinking. Thats why we value diversity of thought, background and experience. Together, we empower restaurants of all sizes to build great teams, increase revenue, improve operations, and delight their guests. We pair our deep understanding of the restaurant industry with powerful cloud based software and restaurant-grade hardware to deliver an intuitive all-in-one platform. Join us on our mission to empower the restaurant community to delight guests, do what they love, and thrive.

Bready for a chance?*

The Payments teams at Toast operate one of the most critical portions of the Toast infrastructure: processing payments on behalf of our restaurants and ensuring that restaurants are paid in a timely manner. Payment processing is a key source of Toasts revenue and is the lifeblood of our customers resulting in millions of dollars processed in transactions per day. Our payment processing systems operate in a secure environment with zero downtime, thanks to our engineers practicing strong discipline to keep things running smoothly.

About this roll*

  • Bring your domain and general experience to re-architect our system for batching payments on a nightly basis to improve scalability
  • Work closely with our Chief Architect and CTO to align platform efforts across the company
  • Implementing a new API for handling credit card authorizations more flexibly, along with corresponding client-side code
  • Coach engineers and teams (e.g., via code review, architecture review) to build better systems
  • Write, deploy and support production code
  • Monitor production systems and build systems/processes to improve our situational awareness and operational efficiency
  • Diagnose performance bottlenecks and implement optimizations
  • Spearhead complex projects that improve functionality and reliability for our customers

Do you have the right ingredients?

  • Extensive experience with Java microservices
  • Knowledge of Cloud Computing and mobile technology, ideally AWS and Android .
  • Exposure to payments system software is a plus
  • Experience working with product teams to plan for solutions that deliver good outcomes to our customer and the company
  • Desire to remain close to the code and are comfortable making complex changes without breaking (too much) stuff
  • A strong understanding of cryptographic primitives and the hands-on experience applying building fault tolerant and secure applications.

    *Bread puns encouraged, but not required

Our Tech Stack

Toasts products run on a stack that ranges from guest and restaurant-facing Android tablets to backend services in Java to internal, guest-facing and restaurant-facing web apps. Our backend services follow a microservice architecture written using Java 8 and DropWizard; we use AWS extensively, ranging from S3 to RDS to Lambda. We have our own platform for dealing with user management, service elevations and robust load balancing. Toast stores data in a set of sharded Postgres databases and utilizes Apache Spark for large scale data workloads including query and batch processing. We are using Apache Pulsar to communicate between modules and are exploring new NoSQL solutions. The front-end is built primarily using Angular and ES6. The main Toast POS application is an Android application written in Java and Kotlin. For data between tablets and our cloud platform we operate RabbitMQ clusters as well as direct tablet communication to the back end.


Employee Testimonials

Maura Grimes Toast
Maura Grimes
Field Service Coordinator

"Ahh toast is awesome! The people, the culture, the bouncy balls, the crazy customers, the killer POS system, and the incredible talent floating through the air. "

Edmund Korley Toast
Edmund Korley
Software Engineer

"I've been participating in the Toast2Toast mentoring project. As a relatively new engineer at Toast, getting the opportunity to discuss technical (and other) topics with a mentor has been really valuable."

Kendal Austin Toast
Kendal Austin
Sr. Marketing Manager

"I have a degree in Marketing Communications and have worked in B2B technology my entire career. My background ranges from social media to paid programs to product marketing. I heard about Toast from a mentor and was connected with the co-founder on LinkedIn. As the second Marketing hire at Toast, I've had the opportunity to be a generalist as well as a specialist, moving where I was needed as the team grew."

Archie Grace Toast
Archie Grace
Engineering Manager

"I looked at a lot of start-ups during my last job search and Toast was by far the most exciting. It was instantly obvious to me how the product is useful to people and why someone might want to buy it. The proof of that has been in the way we have grown and the excitement we have already generated. However, what really excites me about the company is that I feel like we are just scratching the surface in terms of what we can accomplish. There are SO many untapped opportunities around our product and as we continue to grow, I am excited about being able to explore them more.​"