Senior Software Engineer (Application Infrastructure)

Toast; Ireland; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Unlimited vacation

Sabbatical after 5 years

Professional development reimbursement

Wellness stipend

401(k) matching

Medical, dental & vision coverage

Backup childcare

Job summary

Toast is seeking an experienced software engineer to scale and develop its cloud platform and infrastructure in Ireland. You will help build secure, observable, highly available services used by millions and empower hundreds of internal services and devices.

You will architect and deliver high-performance, resilient systems on AWS using Kotlin/Java, PostgreSQL, DynamoDB, and Terraform. Collaboration with product teams will shape future features and the architecture.

Qualifications

• Experience designing and building cloud-native, highly available services.
• Strong knowledge of distributed systems and scalable architectures.
• Proficiency in Java or Kotlin; knowledge of other modern languages is a plus.
• Hands-on experience with asynchronous messaging and event-driven patterns.
• Familiarity with databases, APIs, and integration patterns.

Responsibilities

• Architect, design, and deliver ultra-reliable, high-performance services and infrastructure.
• Collaborate with Product teams to influence features and technical direction.
• Uncover and resolve performance bottlenecks across infrastructure, databases, and APIs.
• Define and enforce engineering best practices, coding standards, and architectural guidelines.
• Manage and operate cloud-native services on AWS; support milhões of users.

Skills

Java/Kotlin

Distributed systems

Asynchronous messaging

Event-driven architecture

APIs & integration patterns

AWS

PostgreSQL

DynamoDB

Terraform

Tools

Terraform

AWS

PostgreSQL

DynamoDB

Job description

• We are looking for an experienced software engineer to play a critical role in further scaling and developing Toast’s cloud platform and infrastructure
• Toast’s platform processes billions of requests per day from hundreds of internal services and hundreds of thousands of mobile devices; these numbers grow exponentially year over year as we add new restaurants and capabilities to the platform
• Our team is responsible for developing secure, observable, highly available, large-scale shared services and infrastructure
• Architect, design, and deliver ultra-reliable, high-performance services and infrastructure used by millions
• Uncover and resolve performance bottlenecks across infrastructure, databases, and APIs
• Define and enable adherence to engineering best practices, coding standards, and architectural guidelines
• Collaborate closely with the Product team to influence features, technical direction, and long-term product vision
• Our team builds and operates on a modern, cloud-native stack with heavy use of AWS, developing services and shared libraries in Kotlin and Go backed by PostgreSQL and DynamoDB
• Infrastructure is provisioned and managed with Terraform
• We oversee Toast’s sharded PostgreSQL databases, own and drive the organization’s use of Apache Pulsar to enable event-driven architecture at scale, and provide developers with tools and services to easily schedule recurring jobs
• Our systems also power customer engagement, integrating with SMS and email providers to reliably deliver millions of messages per day

Benefits

• Peer and company recognition programs
• Unlimited Vacation
• Sabbatical opportunity after five years
• Professional Development Reimbursement Program
• Commitment to Employee Wellness through resources such as a quarterly Wellness Stipend
• Various peer and company recognition programs
• 401(k) and matching
• Medical, Dental, & Vision Coverage
• Subsidized backup childcare
• Mental Health Benefits

Exceptional communication and collaboration skills, with demonstrated ability to align and inspire cross-functional teamsA demonstrated record of mentoring junior team members and enhancing the team’s effectivenessHands-on experience building and operating complex, mission-critical, large-scale distributed systems in the CloudProficiency in Java or Kotlin preferred (experience in other modern programming languages also valued)Track record of delivering clean, maintainable, and resilient code that stands the test of timeExpertise in asynchronous messaging, event-driven architecture, APIs, and integration patterns