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LinkedIndavid@raydar.xyz

Lead Software Engineer

Early-stage software company

  • LocationBoston, Massachusetts
  • TypeFull-time
  • Posted15 October 2026

The role, as published

About the company

Our client is an early-stage software company.

The role

Raydar is recruiting for this role on behalf of our client. Join a very small engineering group as an experienced hands-on engineer who also acts as a product owner. You will deliver new user-facing features and AI-driven functionality, help define technical direction and quality standards, and coach less experienced engineers as the team expands.

What you'll do

  • Lead the new build for upcoming enterprise client deliverables, along with related updates to an existing consumer application.
  • Work directly with company leadership to shape the product roadmap for the coming months and year.
  • Build, debug and evaluate LLM-based agents, including prompt design and testing harnesses.
  • Take ownership of security and compliance readiness within the first 90 days.
  • Mentor and lead other engineers by assigning work, reviewing code and helping hire future teammates.

What we're looking for

  • 6+ years of software engineering experience, with 6 to 10 years ideal.
  • Experience taking user-facing products from zero to one at a startup or a leading product company.
  • Proven ability to build both front-end and back-end features, using React, Python and a major cloud platform.
  • Hands-on experience running LLM-powered features in production, including coordinating multiple agents, designing inputs, testing quality, adding safeguards and monitoring behavior.
  • Experience coaching and guiding other engineers.
  • A high bar for quality, strong ownership, low ego and good judgment about how decisions affect end users.
  • Ability to work on-site five days a week in Boston.
  • U.S. work authorization.

Bonus points

  • Prior work as a founding engineer or in a technical leadership role.
  • Background in healthcare or another regulated field.
  • Familiarity with security and privacy compliance frameworks.
  • Interest in user interface craft and experience with design tools.
  • Degree from a top-tier university, or equivalent experience.

Location and work model

  • Boston, MA, United States
  • On-site, 5 days per week in office
  • Full-time

Compensation, as the posting describes it

  • Equity

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