{"id":2505334,"url":"https://alion.io/job/toast-principal-software-engineer-6","title":"Principal Software Engineer","company":{"id":13243,"name":"Toast","domain":"toasttab.com","url":"https://alion.io/company/toasttab","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":83,"open_postings":3,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":35,"computed_at":"2026-10-14T06:34:16Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Dublin, Ireland"],"countries":["IE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":103000,"max_usd":303000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":1790},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"LLM","optional":false},{"name":"Apache Camel","optional":true},{"name":"Apache Pulsar","optional":true},{"name":"CI/CD","optional":true},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-07-22T15:13:31Z","employer_posted_date":"2026-09-09","last_verified_at":"2026-10-14T18:34:43Z","board_verified":true,"closed_at":null,"days_open":84,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":84},"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.\nYour mission is to lead the architectural design, technical execution, and implementation of AI agents and infrastructure for Toast'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.\nA Day in the Life (Responsibilities)\nDefine and execute the technical architecture for AI agents within the Team domain, ensuring systems are scalable, reliable, and secure.\nPartner closely with Engineering Managers and Product Managers to translate product roadmaps into robust technical designs and deliverables.\nMaintain a strong hands-on presence, writing code, prototyping new patterns, and resolving complex technical bottlenecks under load.\nCollaborate with Principal and Senior Principal Engineers across Toast to align on best practices, agent patterns, and spec-driven development paradigms.\nGuide, mentor, and elevate engineers within the Team area, fostering a culture of technical excellence and continuous learning.\nWhat You'll Need to Thrive (Requirements)\n10+ years of experience designing, building, and operating highly scalable, mission-critical distributed systems and SaaS products (ideally AWS-hosted).\nProven track record of leading complex technical initiatives and delivering robust software architecture from design to production.\nStrong enthusiasm for agentic development practices, LLM integration, and modern software paradigms.\nBalanced expertise: Ability to design high-level technical solutions on a whiteboard while remaining deeply connected to code-level execution and system performance.\nEffective communication: Ability to articulate complex technical ideas clearly to both technical peers and product leadership.\nWhat Will Help You Stand Out (Nice to Haves)\nExperience building systems that leverage LLMs, autonomous agents, or ML models.\nHands-on experience with enterprise integration frameworks (e.g., Apache Camel) or event-driven messaging systems (e.g., Apache Pulsar).\nExperience establishing robust CI/CD, testing, and deployment strategies for complex systems.\nDomain knowledge in workforce management or restaurant operations.\nLocation: Remote (within Ireland) or Hybrid (Dublin)\nAI at Toast\nAt 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.\nOur Total Rewards Philosophy \n 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.\nHow Toast Uses AI in its Hiring Process\nThroughout 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. We ask that you complete interviews and assessments on your own, without real-time AI tools, recording, or transcription bots, unless we tell you otherwise in advance. To learn more: https://careers.toasttab.com/ai-in-hiring\nOur Approach to Hybrid Working\nWe 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\nPeople Are the Secret Ingredient in Our Recipe for Success\nAt Toast, our employees are our secret ingredient-when they thrive, we thrive. The restaurant industry brings together people with a wide range of backgrounds, experiences, and perspectives, and we value that same breadth at Toast. We strive to build a culture grounded in authenticity, respect, and humility, where every Toaster has a real opportunity to grow, contribute, and do their best work-raising the bar in delivering exceptional experiences for our customers and each other.\nApply today!\nToast 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 .\n------\nFor 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. 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