Principal Software Engineer - Pay Group Engineering

Gusto Gusto · Fintech · Denver, CO +2 · Engineering

Principal Software Engineer role at Gusto, focusing on core platform capabilities for Payroll and Tax systems. The role involves technical leadership, system design, scaling existing applications (Ruby/Rails, TypeScript/React), and mentoring engineers. While AI is fundamental to how work is done at Gusto and engineers are expected to engage with AI tools, this role is not primarily focused on building AI models or agents, but rather on engineering robust systems that may leverage AI tools.

What you'd actually do

  1. Function as a Technical Lead across multiple teams in Payroll Services, helping us keep engineers unblocked and deliver high-quality work supporting our long-term goals
  2. Design, build, and test the foundation that supports compliant payroll for millions of people
  3. Help scale one of the largest Ruby/Rails and TypeScript/React applications in the world
  4. Collaborate on complex and ambiguous problems with partnerships from Engineering, Product Management, Design, Data Science, Compliance, Operations, and other cross-functional teams
  5. Mentor and grow fellow engineers working to create holistic and scalable solutions

Skills

Required

  • 15+ years of experience
  • Able to build maintainable, structured, well-documented code
  • Strong knowledge of data structures, data modeling, and system design
  • Experience working across 3+ teams, influencing both product and team direction
  • Experience working on platform products which are depended upon throughout the company
  • Experience engineering, designing, building and supporting large scale systems in production
  • An aptitude in bringing clarity and simplicity to complex problems, communicating technical complexity and facilitating informed tradeoffs to major stakeholders
  • Experience operationalizing and scaling large interconnected production systems
  • Enthusiasm for a collaborative, test-driven environment
  • Experience in complex highly regulated domains
  • Experience using AI tools to build, test, and iterate on products quickly
  • Understanding of how to evaluate AI-driven outputs using clear success criteria
  • A commitment to staying current on emerging backend technologies and AI frameworks and patterns, regularly experimenting with new approaches
  • Willingness to contribute to shared tools or templates that enhance the speed and safety of AI experimentation

Nice to have

  • AI and Machine Learning knowledge

What the JD emphasized

  • Experience in complex highly regulated domains
  • Experience using AI tools to build, test, and iterate on products quickly
  • Understanding of how to evaluate AI-driven outputs using clear success criteria
  • A commitment to staying current on emerging backend technologies and AI frameworks and patterns, regularly experimenting with new approaches
  • Willingness to contribute to shared tools or templates that enhance the speed and safety of AI experimentation