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