Senior Software Engineer

Human Interest is a fintech company focused on making retirement benefits accessible to employees at small and medium-sized businesses. The Senior Software Engineer will build and scale retirement products and foundational services, improve system reliability and automation, and collaborate with engineers and stakeholders. The role also involves directing AI agents throughout the development lifecycle and expanding the use of AI tooling in engineering work.

Responsibilities:

• Design, build, and maintain our user experiences for both external and internal customers
• Work on business-critical, foundational services which serve as the data funnel of our entire platform
• Improve complex processes and systems to make them more robust and require less human intervention
• Collaborate with other engineers and stakeholders to share knowledge and build expertise
• Develop ownership over domains in our system and make informed engineering tradeoffs
• Advocate for and delight internal and external users
• Direct AI agents across the full development lifecycle, from prototyping and implementation to debugging and code review. Operate as the architect and decision-maker while AI handles the building
• Expand what's possible with AI tooling and identify opportunities to automate repetitive engineering work, improve code quality through AI-driven review, and share effective patterns with your team

Requirements:

• 6+ years of experience building and maintaining software in production
• Desire to work with the following technologies: Node, TypeScript, Kotlin, React, AWS, PostgreSQL, Kafka
• Proficiency in leveraging AI coding assistants (e.g., Codex, Claude Code and Cursor) to accelerate development cycles and improve code quality
• Top notch communication skills. You can communicate well with engineers and non-engineers alike
• Strong desire to learn, think creatively, and share knowledge with others
• Enjoy mentoring other engineers and deeply review their code
• Proactive and empathetic mindset - you love to roll up your sleeves to fix problems for our customers
• Past experience working in startups and/or fintech