Staff Backend Software Engineer

Toast; Ireland; On-site; EUR 75,000 - 100,000; Full time

Benefits offered by this job

Unlimited Vacation

Professional Development Reimbursement

Wellness Stipend

401(k) and matching

Medical, Dental, & Vision Coverage

Mental Health Benefits

Subsidized backup childcare

Job summary

Toast is hiring a Staff Software Engineer to enhance their payment processing solution. This role involves guiding development, implementing best practices, and collaborating with various teams. The ideal candidate will have over 8 years of backend service experience and expertise in API development.

Benefits include unlimited vacation, professional development reimbursement, wellness resources, and comprehensive health coverage. Join Toast to make a significant impact in payment technology.

Qualifications

• 8+ years of experience in designing and implementing robust backend services.
• Proven ability to design and develop scalable and secure APIs.
• Demonstrated proficiency with DynamoDB or PostgreSQL.

Responsibilities

• Guide development of services for payment processing.
• Plan, design, build, and deliver features for payments products.
• Implement best practices like automated test suites.

Skills

Technical leadership

Microservices architecture

Backend service design

API development

DynamoDB or PostgreSQL

Kotlin or Java

Modern data architectures

Payments API design

Familiarity with PCI-DSS

AI-augmented development

Job description

We are seeking a Staff Software Engineer to join our Payments team to build out our unified payment processing solution. This platform offers a single, integrated service for payment acceptance across various channels and supports a configurable enterprise approach. It is designed to allow a build‑once, available‑to‑all strategy for both existing and emerging payment methods.

Responsibilities

• Guide and contribute to the development of services providing supporting and core functionality within and around this payment processing solution.
• Plan, design, build, and deliver features for Toast’s payments products.
• Plan, develop, and implement best practices such as automated test suites to ensure the code shipped to our customers meets the highest quality standards.
• Roll — pun intended! — features out to customers, including monitoring for success.
• Collaborate with our PM (and UX) on the definition and design of features.
• Collaborate and partner with a wide array of teams across Toast to spread knowledge inter- and intra-team.
• Lead and work with experienced engineers to deliver design and code review.

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
• Mental Health Benefits
• Subsidized backup childcare

Qualifications

• Ability to step into a technical leadership role on the team, guiding/coaching/mentor more junior engineers on best practices in architecture, design, coding, testing, deployment, etc.
• Demonstrated experience with microservices architecture and containerization technologies for enhanced scalability and maintainability.
• 8+ years of experience in designing and implementing robust backend services.
• Proven ability to design and develop scalable and secure APIs that integrate with various internal/external systems.
• Applied knowledge of best practices in API lifecycle management, including versioning, documentation, and deprecation strategies, with the ability to share this amongst the team and peers.
• Demonstrated proficiency with DynamoDB or PostgreSQL.
• Proficiency in Kotlin (or Java and willing to learn Kotlin) and Kotlin-specific frameworks and libraries for building efficient backend solutions.
• Experience with modern data architectures (event sourcing, OLAP, ETL/ELT, streaming data).
• Experience designing payments APIs.
• Familiarity with PCI-DSS.
• Familiarity with AI-augmented development workflows and tools (e.g., Claude Code, GitHub Copilot, Codex, or similar).