---
title: 'Principal Software Engineer, Data Platform at Toast'
canonical: 'https://feeny.ai/job/principal-software-engineer-data-platform-toast-dublin-dd7wxxb0s3hk'
type: 'job'
last_seen: '2026-09-08'
---

# Principal Software Engineer, Data Platform at Toast

- **Company:** Toast
- **Location:** Dublin, Ireland
- **Posted:** 2026-09-08
- **Last confirmed live:** 2026-09-08
- **Apply:** https://careers.toasttab.com/jobs?gh_jid=8185374

## Job description

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 hiring a Principal Software Engineer to join our data platform (AAP) team in Dublin. The AAP team owns the foundational data infrastructure that powers Toast's analytics products and AI/ML capabilities: real-time streaming pipelines, a cloud-native data lakehouse, feature serving for ML-driven product experiences, and the infrastructure that enables product teams across Toast to build intelligent, data-driven experiences for our 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, you'll contribute to the technical strategy for our most critical data platform initiatives - deep hands-on work with Spark and Iceberg, driving architectural decisions grounded in how these technologies actually behave under load, and helping shape the platform's touch points with the same care you'd bring to an external product. You'll work closely with other senior engineers and technical leads, influence adjacent teams, and mentor engineers across the organisation - articulating technical direction clearly to engineering, product, and leadership, and bringing people along through a significant platform transformation. Success looks like other engineering teams moving faster because of the platform you help build.

A day in the life (Responsibilities)

- Work hands-on with Spark, Iceberg, and our streaming infrastructure - diagnosing performance, reasoning through architectural decisions, and building systems that other teams depend on at scale
- Contribute to technical strategy for data platform initiatives alongside other senior engineers and technical leads, translating complex problems into clear direction and executable plans
- Design and evolve the platform's API surfaces so that engineers across Toast can self-service - adoption and ease-of-use are part of the job
- Influence adjacent teams and align stakeholders across engineering, product, and leadership on architectural decisions
- Mentor engineers on the team and raise the bar on engineering practices across the organisation
- Use AI tooling as a genuine force multiplier in your day-to-day work and help the team do the same

## What you'll need to thrive (Requirements)

- 8+ years in software engineering with meaningful experience in data platform or distributed systems
- Deep expertise in Apache Spark and Apache Iceberg, not just operational familiarity
- Strong background in streaming infrastructure (Apache Kafka, Apache Pulsar, or similar) and cloud-native data platforms on AWS
- Experience designing internal platforms and developer-facing abstractions - you think about your platform's users as carefully as product engineers think about end users
- Demonstrated ability to drive technical alignment across multi-team environments, including the communication work that makes architectural changes actually stick
- Databricks experience is a bonus but we care more that you understand what's running underneath it

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.

**This is a hybrid role requiring in-office collaboration two days per week in our [Dublin office](https://careers.toasttab.com/ireland).**

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.

## #LI-HYBRID

#BI-Hybrid 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.

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: https://careers.toasttab.com/locations-toast.

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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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.

## About Toast

## Company Overview
- **One-liner**: Toast provides a cloud-based, all-in-one digital technology platform of SaaS and fintech solutions purpose-built for the restaurant and hospitality industry.
- **Entity Type**: Public (ticker: TOST)
- **Headquarters**: Boston, Massachusetts, United States
- **Founded**: 2012
- **Founders**: Not listed in provided sources

## Core Business
- **Primary industry**: Restaurant technology / hospitality technology
- **Target customers**: Restaurants of all sizes (independent, chain, enterprise), other hospitality businesses (B2B)
- **Mission or purpose statement**: "To empower the restaurant community to delight guests, do what they love, and thrive."

## Products & Services
- **Toast POS**: Cloud-based point-of-sale system for dine-in, takeout, delivery, catering, and retail operations.
- **Toast Payments**: Integrated financial technology solutions for card processing, tipping, and payouts.
- **Toast Digital Ordering & Delivery**: Online ordering platform, website integration, and third-party delivery management.
- **Toast Marketing & Loyalty**: Tools for email/SMS marketing, guest loyalty programs, and gift cards.
- **Toast Team Management**: Scheduling, payroll, and labor management features integrated with POS.
- **Toast Operations**: Inventory management, vendor ordering, and back-of-house tools.

## Market Standing
- **Valuation/Market Cap**: Not publicly available from provided sources
- **Key Metric**: Headcount – over 5,000 employees globally (as of May 2026); 4,503 US-based employees (May 2026)
- **Notable Investors/Partners**: Not listed in provided sources
- **Growth Signals**: Expanded to 11 locations across US, Canada, Ireland, UK, India, Australia, and Taiwan; approximately 20% of open roles filled internally; hybrid work model with strong onboarding and development programs; ranked #62 on Fortune 100 Best Companies to Work For 2025 and multiple other Great Place to Work awards (Best Workplaces for Parents, Women, Millennials, Technology).

## Competitive Advantages
- **Deep domain expertise**: Roughly two-thirds of employees have firsthand restaurant industry experience, giving unique insight into customer needs.
- **Purpose-built platform**: All-in-one system connecting front and back of house, unlike generic POS or ERP solutions.
- **Customer obsession**: Strong focus on understanding and earning customer trust, with 84% of employees rating the company a great place to work (compared to 57% at typical US firms).
- **Data-informed innovation**: Dedicated teams researching "what's next" to stay ahead of restaurant industry trends.

## Strategic Focus
- Continue empowering the restaurant community with data-informed solutions and cutting-edge technology.
- Maintain and expand geographic presence while preserving hybrid work culture.
- Invest in social impact through Toast.org, employee volunteer campaigns, and ESG initiatives.

## Why Work Here
- **Culture**: Described as driven, collaborative, inclusive, and fun; 84% of employees say it's a great place to work (Great Place to Work certified).
- **Work model**: Hybrid model with in-person collaboration supported by remote/office flexibility; 90-day onboarding program includes live sessions, social events, and online courses.
- **Growth**: Professional development programs, peer and company recognition, and significant internal mobility (20% of roles filled internally).
- **Perks**: Paid time off, mental health/well-being support, computer equipment provided, regular volunteer events via Toast.org.
- **DEI**: Inclusive design, equitable practices, and diversity encouraged to reflect the diverse restaurant community.

## Sources
1. [careers.toasttab.com](https://careers.toasttab.com/) – Life at Toast, culture, values, hybrid policy
2. [careers.toasttab.com/faq](https://careers.toasttab.com/frequently-asked-questions) – Headcount, internal fill rate, onboarding, DEI
3. [glassdoor.com](https://www.glassdoor.com/Overview/Working-at-Toast-Inc-EI_IE989964.11,20.htm) – Company type, headquarters, founded year, mission
4. [greatplacetowork.com](https://www.greatplacetowork.com/en/certified-company/7011573) – Headcount, employee survey scores, award lists

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