Senior Software Engineer, IAM

Toast; Dublin; On-site; EUR 110,000 - 150,000; Full time

Job summary

Toast is seeking a Senior Software Engineer for the Identity Management team in Ireland. You will develop reliable code and algorithms for user management, authentication, and permissions, working with a cross-functional team to scale a SaaS platform.

The role emphasizes collaboration, best practices, and mentoring, with a hybrid Dublin office requirement and a focus on resilient, high-performance services used by millions of users.

Qualifications

• Proficient in Java, Kotlin or another OO language with strong testing and quality practices.
• Deep understanding of microservices, distributed systems, and enterprise messaging.
• Experience with asynchronous messaging (Pulsar, JMS, Kafka).
• Proven track record delivering reliable production services.
• Excellent communication, able to simplify complex concepts for stakeholders.
• Passion for technology and continuous learning.
• Experience making impact on previous projects or teams.
• Ability to tackle complex and ambiguous problems and share knowledge.

Responsibilities

• Be part of a team designing, building, and maintaining high performance, scalable microservices and related web/mobile apps.
• Define best practices and help evolve our tech stack while delivering world-class applications.
• Champion quality through testing and code reviews; monitor feature rollouts for customer success.
• Design, build, deploy, and maintain resilient systems critical to customer success.
• Diagnose performance bottlenecks and optimize for better performance.
• Ensure work is delivered with quality and properly monitored in production.
• Mentor other team members.

Skills

Java

Kotlin

Object-oriented design

Microservices

Distributed systems

Asynchronous messaging

Pulsar

Kafka

IAM

Agile/Scrum

Mentoring

Team collaboration

Complex problem solving

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.

Toast is looking for a Senior Software Engineer to join our Identity Management team to play a critical role in developing reliable code and algorithms in our user management, permission, and web services. We are looking for an engineer who has the ability and drive to make an impact, not only on their own but by also enabling those around them to succeed.

Partnering with stakeholders, product managers, product designers, product data analysts, and other engineers, you will be part of a team responsible for ensuring that our practices in the development of our platform are safe and secure. You will also be responsible for developing and maintaining core services and repositories in Toast, including integrations, managing users, authentication, and permissions. The Toast platform processes tens of millions of requests per day, and this number grows constantly as we add new restaurants and integration partners to our system. The services we develop on this team are essential for Toast’s operation and their resilience and reliability are crucial from a business and user perspective.

If you want to help create something tangible that is used every day, help small businesses achieve their vision, and take on the challenge of scaling a SaaS product from millions of users to hundreds of millions of users, Toast is the place for you.

A day in the life (Responsibilities)

• Be part of a team working collaboratively with UX, PM, QA and other engineers designing, building and maintaining high performance, flexible and highly scalable microservices, as well as development of web and mobile applications
• Define best practices and help choose technologies to evolve our current tech. stack while writing world-class applications
• Championing best practices such as quality integration and unit testing
• Tackle scaling challenges and implement robust solutions.
• Provide design feedback and participate in code reviews to ensure implementations meet requirements
• Monitor feature rollouts to ensure customer success, iterating and improving when necessary.
• Design, build, deploy, and maintain highly resilient and scalable systems critical to our customers’ success.
• Diagnose performance bottlenecks and optimise for better performance.
• Ensure that all work done is delivered with quality and is appropriately monitored and supported in production
• Mentoring other team members

What you'll need to thrive (Requirements)

• Proficient in Java, Kotlin or another object-oriented language, with a deep understanding of testing, quality & best practices.
• In-depth understanding of microservices, distributed systems, and enterprise messaging.
• Familiar with asynchronous communication tools (e.g., Pulsar, JMS, Kafka).
• Proven track record of delivering reliable services to production.
• Excellent communication skills, with the ability to simplify complex technical concepts for non-technical stakeholders.
• A passion for technology and continuous learning.
• Prior experience making an impact on a previous project, product or within an organization.
• Enthusiasm for solving impactful challenges and writing clean, scalable code.
• A focus on both personal and team growth, balancing task completion with platform stability.
• The capacity to tackle complex and ambiguous problems, communicate clearly with others to solve the problem, and share knowledge to help the whole team succeed
• Experience working in the IAM space
• Exposure to distributed systems is a plus
• Experience working in a team with Agile/Scrum methodology

This is a hybrid role requiring in-office collaboration two days per week in our Dublin office.

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.

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 [e-mail].

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.