Principal Software Engineer

United States Digital Space LLC; Dublin; Hybrid; EUR 150,000 - 210,000; Full time

Job summary

ToastTab is seeking a Principal Engineer to lead the design and implementation of AI agents in the Team domain within our FinTech line. You'll drive scalable architectures, partner with Engineering Managers and Product Managers, and stay hands-on with code to push modern patterns in production.

You will mentor engineers, promote technical excellence, and align practices across the company while ensuring security, reliability, and performance in a distributed SaaS environment.

Qualifications

• 10+ years of experience designing, building, and operating highly scalable distributed systems (AWS hosted preferred).
• Proven track record of leading complex technical initiatives from design to production.
• Strong enthusiasm for agentic development, LLM integration, and modern software paradigms.
• Ability to design high-level solutions while staying connected to code-level execution and performance.
• Excellent written and verbal communication with product leadership.

Responsibilities

• Define and execute the technical architecture for AI agents within the Team domain.
• Collaborate with Engineering and Product Management to translate roadmaps into designs.
• Maintain hands-on coding, prototyping patterns, and resolving bottlenecks under load.
• Mentor engineers and promote technical excellence and continuous learning.
• Align practices with other Principal engineers to share best practices.

Skills

Distributed systems

SaaS architecture

Agentic development

LLM integration

Technical leadership

AWS hosted

Tools

Apache Camel

Apache Pulsar

CI/CD

Job description

the company 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.

Your mission is to lead the architectural design, technical execution, and implementation of AI agents and infrastructure for the company's Team area within our FinTech line of business. The Team area is a mission-critical space on which our restaurants rely to manage their staff and optimize their labor. As a Principal Engineer, you will serve as a key technical leader in the group, driving modern architectural patterns—including spec-driven development and agentic workflows—to deliver high-impact software.

A Day in the Life (Responsibilities)

• Define and execute the technical architecture for AI agents within the Team domain, ensuring systems are scalable, reliable, and secure.

• Partner closely with Engineering Managers and Product Managers to translate product roadmaps into robust technical designs and deliverables.

• Maintain a strong hands‑on presence, writing code, prototyping new patterns, and resolving complex technical bottlenecks under load.

• Collaborate with Principal and Senior Principal Engineers across the company to align on best practices, agent patterns, and spec-driven development paradigms.

• Guide, mentor, and elevate engineers within the Team area, fostering a culture of technical excellence and continuous learning.

What You'll Need to Thrive (Requirements)

• 10+ years of experience designing, building, and operating highly scalable, mission‑critical distributed systems and SaaS products (ideally AWS‑hosted).

• Proven track record of leading complex technical initiatives and delivering robust software architecture from design to production.

• Strong enthusiasm for agentic development practices, LLM integration, and modern software paradigms.

• Balanced expertise: Ability to design high‑level technical solutions on a whiteboard while remaining deeply connected to code‑level execution and system performance.

• Effective communication: Ability to articulate complex technical ideas clearly to both technical peers and product leadership.

What Will Help You Stand Out (Nice to Haves)

• Experience building systems that leverage LLMs, autonomous agents, or ML models.

• Hands‑on experience with enterprise integration frameworks (e.g., Apache Camel) or event‑driven messaging systems (e.g., Apache Pulsar).

• Experience establishing robust CI/CD, testing, and deployment strategies for complex systems.

• Domain knowledge in workforce management or restaurant operations.

Location:

Remote (within Ireland) or Hybrid (Dublin)

AI at the company

At the company, 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/the company-benefits.

How the company 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-the company

Diversity, Equity, and Inclusion is Baked into our Recipe for Success

At the company, 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-the company.

the company 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 subject to criminal penalties and civil liability.*