Senior Software Engineer, IAM

Toast; Ireland; On-site; EUR 90,000 - 140,000; Full time

Benefits offered by this job

Hybrid work model

Dublin office access

Job summary

Toast is hiring a Senior Software Engineer for the Identity Management team in Dublin. You will help design, deploy and maintain high‑performance microservices handling user management, authentication and permissions.

The role emphasizes reliability, scalability and collaboration with cross‑functional teams. You'll optimize systems processing millions of requests daily and contribute to secure, resilient services.

Qualifications

• Proficient in Java or Kotlin with strong testing, quality and best practices.
• Deep understanding of microservices, distributed systems and enterprise messaging.
• Experience with asynchronous communication tools such as Pulsar, JMS or Kafka.
• Proven track record delivering reliable services to production.
• Excellent communication skills for non-technical stakeholders.
• Passion for technology and continuous learning.
• Impactful contribution on previous projects or teams.
• Commitment to scalable, clean code and team growth.
• Ability to tackle complex problems and share knowledge across the team.

Responsibilities

• Collaborate with UX, PM, QA and engineers to build scalable microservices and mobile/web apps.
• Help evolve the tech stack while delivering world-class applications.
• Champion quality practices like integration and unit testing.
• Address scaling challenges with robust solutions.
• Provide design feedback and participate in code reviews.
• Monitor feature rollouts to ensure customer success and iterate.
• Design, build, deploy, and maintain resilient systems critical to customers.
• Diagnose performance bottlenecks and optimise throughput.
• Ensure production work is well-monitored and supported.
• Mentor other team members.

Skills

Java

Kotlin

Testing & quality

Microservices

Distributed systems

IAM

Agile/Scrum

Communication

Tools

Pulsar

Kafka

JMS

REST APIs

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. 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.

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.
• Champion 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.
• Mentor other team members.

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.**

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].

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