Principal Software Engineer

Ready to Be a Titan? At Service Titan, we build the operating system for the trades — a comprehensive platform that powers scheduling and dispatch, CRM, payments, financing, reporting, and more for thousands of service businesses across the U.S. and beyond. We apply Machine Learning and AI throughout to automate workflows, surface insights, and help our customers run better businesses. We're a quality-driven engineering organization working on the cutting edge of the .NET

platform — designing systems for scale, solving hard technical problems, and holding a high bar for craft. If that's the kind of work that excites you, we'd love to hear from you.

• Define Global Architecture:
  Set the long-term vision for our .NET microservices architecture, ensuring it can support massive scale, AI-driven automation, and multi-tenant complexity.
• High‑Stakes Problem Solving:
  Act as the "special forces" for R&D, diving into the most critical performance bottlenecks or architectural failures and leading the team to a solution.
• Influence the
  
  Roadmap:
  
  Partner with executive leadership to determine the "art of the possible," ensuring our technical capabilities stay ahead of market demands.
• Set the Standard for AI:
  Lead the integration of AI‑assisted development and LLM APIs into our production environment, establishing the safety, security, and quality guardrails for the entire org.
• Community & Brand:
  Represent Service Titan Engineering in the broader .NET community through open‑source contributions, speaking, or technical blogging, helping us attract the top 1% of talent.

• A Legacy of Impact: 20+ years of professional engineering experience, with a proven history of being the primary technical lead on multiple "business‑critical" systems that have successfully scaled to millions of users.
• Mastery of the .NET Ecosystem:
  Expert‑level C# knowledge with a deep understanding of the .NET runtime, memory management, and high‑performance optimizations.
• Distributed Systems Visionary:
  Deep hands‑on experience with the trade‑offs of distributed state, eventual consistency, and global concurrency. You’ve successfully navigated major architectural shifts (e.g., Monolith to Microservices) at enterprise scale.
• Strategic Partnership:
  Experience collaborating directly with VPs and Directors to translate a multi‑year business roadmap into a technical execution plan. You can communicate technical risks to non‑technical stakeholders with clarity and empathy.
• Operational Excellence: A "Service Ownership" mindset. You have the "battle scars" from managing major production incidents and the foresight to build the resilience patterns that prevent them.
• Force Multiplier: A track record of mentoring the next generation of technical leaders. You have raised the talent bar of an entire organization through architectural reviews, "Golden Path" creation, and engineering standards.
• Education:
  
  B.S., M.S., or PhD in Computer Science, Physics, Engineering, or a related field (or equivalent elite‑level practical experience).

• AI as a Teammate:
  Hands‑on experience leveraging AI coding tools (e.g., Claude, ChatGPT, Cursor, Git Hub Copilot) to accelerate development, improve code quality, and streamline debugging workflows.
• Engineering Judgment:
  Ability to critically evaluate and integrate AI‑generated output, applying sound engineering judgment to ensure correctness, security, and maintainability.
• AI Integration:
  Experience integrating LLM APIs (e.g., OpenAI, Anthropic) or AI services into production applications.
• A Growth Mindset:
  Eagerness to stay current with the rapidly evolving AI tooling landscape and champion best practices for AI‑assisted development within the team.
• Champion an AI‑Forward Culture:
  Set the standard for how AI‑assisted development is adopted and practiced across the R&D org, establishing guardrails, sharing best practices, and inspiring engineers at every level to integrate AI tooling with craft and intentionality.

Being human isn’t about checking every box on a list. It’s about the experiences we have, people we meet, and the perspectives we share. So, if you have the skills but…