Principal Software Engineer

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.

We are looking for a Principal Software Engineer to join the Advanced Analytics Platform (AAP) team.

The AAP team owns the data platform powering Toast's analytics products and AI/ML capabilities. Our mission is to build the foundational data infrastructure - real-time streaming, data lakehouse, feature serving, and cloud-native analytics pipelines - that enables product teams across Toast to build intelligent, data-driven experiences for over 170,000 restaurant customers. We are in the middle of a significant platform evolution: migrating to Apache Iceberg, standing up a new Feature Store, and scaling our streaming infrastructure to meet the demands of a rapidly growing business.

As a Principal Software Engineer on this team, you will play a key role in defining the technical strategy for our most critical data platform initiatives. You will define how we evolve our architecture, build the frameworks and patterns that enable other engineers to move fast, and establish Toast as a leader in data platform engineering. This is a role for someone who thinks at the level of the business problem first, translates that into clear technical direction, and brings teams along with them.

A day in the life (Responsibilities)

• Design, build, deploy, and maintain highly resilient and scalable systems that are critical to the success of Data at Toast
• Develop and execute technical strategies to solve complex business challenges, leveraging data-driven decisions to prioritize impactful changes.
• Build and maintain strong partnerships across lines of business, aligning technical solutions with strategic objectives.
• Mentor and guide engineers, fostering a culture of continuous improvement, inclusivity, and engineering excellence.
• Effectively communicate technical direction, guide teams through execution and drive organizational quality practices
• Diagnose performance bottlenecks and implement optimizations
• 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.

What you'll need to thrive (Requirements)

• 8+ years of experience in software engineering with demonstrated expertise in data platform or distributed systems engineering
• Strong background in data lakehouse technologies (Apache Iceberg, Delta Lake, or similar), streaming infrastructure (Apache Kafka, Apache Pulsar, or similar), and cloud-native data platforms (Databricks, AWS, or similar)
• Demonstrated ability to deliver high-impact, scalable solutions in complex, multi-product environments.
• Strong leadership and mentoring skills, with a track record of guiding teams through architectural transformations.
• Excellent communication skills, with the ability to articulate complex technical concepts to diverse audiences.
• Passionate about driving innovation and continuously improving engineering practices.

Our tech stack

Our data platform runs on AWS and spans Apache Iceberg for table format and lakehouse architecture, Apache Kafka and Pulsar for real-time streaming, Apache Spark for data processing, and DynamoDB and Postgres for operational data stores. We are migrating from legacy ETL patterns toward a modern, cloud-native data lakehouse and building out Feature Store capabilities to power ML-driven product experiences. Our backend services are primarily Kotlin and Java.

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

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, boncommissions if eligible), equity, and benefits. You can learn more about how we align pay with local labor markets in our Geographic Pay Zone Philosophy.

Zone A

$230,000-$368,000 USD

Zone B

$200,000-$320,000 USD

Zone C

$180,000-$288,000 USD

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. To learn more:

Diversity, Equity, and Inclusion is Baked into our Recipe for Success

At Toast, our employees are our secret ingredient-when they thrive, we thrive. The restaurant industry is one of the most diverse, and we embrace that diversity with authenticity, inclusivity, respect, and humility. By embedding these principles into our culture and design, we create equitable opportunities for all and raise the bar in delivering exceptional experiences.

We Thrive Together

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 restaurant community. To learn more about how we work globally and regionally, check out:

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

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.