Lead Software Engineer

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.

Requirements

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.

Benefits

Compensation and benefits

• Base salary: USD 185,000 to 210,000 per year
• Equity Location and work model
• Boston, MA, United States
• On-site, 5 days per week in office
• Full-time