
Senior Software Engineer- Fintech
Toast · Dublin, County Dublin, Ireland
- On site
- Full-time
- $150,000 / year
- Dublin, County Dublin, Ireland
Job highlights
- Build and deliver features for payments products.
- Develop scalable and secure APIs.
- Work with microservices architecture.
- Collaborate with PM and UX teams.
- Contribute to payments processing solution.
About the role
Senior Software Engineer Fintech
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.
Fintech at Toast operates one of the most critical portions of the Toast infrastructure: processing payments on behalf of our restaurants and ensuring that restaurants are paid in a timely manner. Payment processing is a key source of Toast’s revenue and also the lifeblood of our customers; we process millions of dollars in transactions per day.
We are seeking a Senior 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. The successful candidate will contribute to the development of services providing supporting and core functionality within and around this payment processing solution.
A Day In The Life (Responsibilities)
- Design, build, and deliver features for Toast’s payments products
- Develop and implement automated test suites to ensure the code shipped to our customers meets the highest quality standards
- Roll features out to customers, including monitoring for success
- Collaborate with our PM (and UX) on the definition and design of features
- Partner with a wide array of teams across Toast
- Work with experienced engineers to deliver design and code review
What You'll Need To Thrive (Requirements)
- 5+ years of experience in designing and implementing robust backend services
- Proven ability to develop scalable and secure APIs that integrate with various internal/external systems
- Knowledge of best practices in API lifecycle management, including versioning, documentation, and deprecation strategies
- Demonstrated experience with microservices architecture and containerization technologies for enhanced scalability and maintainability
Special Sauce (Nice to Haves)
- 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)
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.
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. 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.
Diversity, Equity, and Inclusion is Baked into our Recipe for Success
At Toast, our employees are our secret ingredient—when they thrive, we thrive. The restaurant industry is one of the most diverse, and we embrace that diversity with authenticity, inclusivity, respect, and humility. By embedding these principles into our culture and design, we create equitable opportunities for all and raise the bar in delivering exceptional experiences.
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.
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.
Key skills/competency
- Senior Software Engineer
- Fintech
- Payments Processing
- Backend Services
- API Design
- Microservices
- Containerization
- Kotlin/Java
- DynamoDB/PostgreSQL
- Scalability
Skills & topics
- Senior Software Engineer
- Fintech
- Payments
- Backend Development
- API Design
- Microservices
- Kotlin
- Java
- AWS
- Cloud Computing
- Software Development
- Engineering
- Technology
How to get hired
- Tailor your resume: Highlight 5+ years of backend experience and API development skills.
- Showcase your expertise: Emphasize experience with microservices, containerization, and fintech.
- Prepare for technical interviews: Be ready to discuss API design, database knowledge, and Kotlin/Java.
- Understand Toast's culture: Research their values, especially around innovation and AI.
- Apply with confidence: Clearly articulate your contributions to scalable and secure systems.
Technical preparation
Behavioral questions
Frequently asked questions
- What does a Senior Software Engineer Fintech do at Toast?
- As a Senior Software Engineer Fintech at Toast, you will design, build, and deliver features for the company's payments products. This includes developing robust backend services, creating scalable and secure APIs, and contributing to a unified payment processing solution that handles millions of dollars in transactions daily.
- What are the key technical requirements for this Senior Software Engineer role at Toast?
- The key technical requirements include 5+ years of experience in designing and implementing backend services, proven ability to develop scalable and secure APIs, knowledge of API lifecycle management, and demonstrated experience with microservices architecture and containerization. Familiarity with DynamoDB, PostgreSQL, and Kotlin/Java is also important.
- What is Toast's approach to AI in the hiring process for the Senior Software Engineer Fintech position?
- Toast uses AI tools to assist recruiters and interviewers with tasks like note-taking and summarization during the hiring process for the Senior Software Engineer Fintech role. However, all hiring decisions are ultimately made by people, ensuring a human-centric approach to talent acquisition.
- What is the work arrangement for the Senior Software Engineer Fintech position at Toast?
- The job posting indicates a #BI-Hybrid work arrangement for the Senior Software Engineer Fintech role, suggesting a blend of in-office collaboration and remote flexibility. Specific in-office expectations can be found on Toast's careers site.
- How does Toast approach diversity, equity, and inclusion for the Senior Software Engineer Fintech role?
- Toast embeds diversity, equity, and inclusion into its culture, recognizing employees as its 'secret ingredient.' They embrace the diversity inherent in the restaurant industry and strive to create equitable opportunities for all applicants, including those for the Senior Software Engineer Fintech position.
- What are the 'nice to have' skills for the Senior Software Engineer Fintech role at Toast?
- Nice-to-have skills for the Senior Software Engineer Fintech role at Toast include proficiency with DynamoDB or PostgreSQL, experience with modern data architectures (event sourcing, streaming data), experience designing payments APIs, familiarity with PCI-DSS, and experience with AI-augmented development tools.
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