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Principal Full Stack Software Engineer

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Helpcare AI

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Location:
United States , Berkeley

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

150000.00 - 250000.00 USD / Year
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Job Description:

JITX is revolutionizing circuit board design by making it code-first. Instead of dragging components around in a GUI, engineers write code—or have AI write it for them—to define their circuit boards. We're a ~20-person startup building tools that bring software engineering practices to hardware design.

Job Responsibility:

  • Drive technical direction for significant product areas and own them end-to-end
  • Work across our stack—from user management systems to our core design application—making architectural decisions
  • Identify technical debt, propose solutions, and drive consensus around the right path forward
  • First major project will be reworking our user and license management system, which you'll architect and largely implement while coordinating with stakeholders across the company
  • Transition to working on critical core runtime components that power our circuit design engine
  • Raise the bar for engineering across the team—through code reviews, technical mentorship, and establishing patterns that others can follow

Requirements:

  • Extensive full stack experience with TypeScript/React and Python, with a track record of architectural decisions at scale
  • Strong algorithmic problem-solving skills with understanding of complexity analysis, graph/tree data structures, and computational efficiency
  • Ability to drive technical direction and follow through on architectural decisions across the stack
  • Experience identifying technical debt, evaluating tradeoffs, and building consensus around solutions
  • Self-directed work style with strong product sense and ability to unblock yourself and others
  • Experience gathering requirements from stakeholders and translating them into technical solutions and system designs
  • Track record of owning large, complex features from planning through production
  • Ability to mentor and raise technical standards across a team through code reviews and establishing best practices
  • Comfortable working with ambiguity in a startup environment
  • 6+ years experience

Nice to have:

  • Experience with graphics/visualization libraries (PixiJS, Three.js, WebGL)
  • Background in developer tools or technical products
  • MongoDB and PostgreSQL experience, or other databases
  • Auth/identity management systems (WorkOS, Auth0, etc.)
  • Polyglot programming experience—comfortable across multiple languages and paradigms
  • Interest in hardware, electronics, or CAD tools

Additional Information:

Job Posted:
January 16, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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