Senior Full-Stack Software Engineer (JavaScript)

What You'll Do: - Build full-stack and SPA TypeScript applications ranging from experiments to flagship products - Collaborate on product decisions and communicate technical constraints and considerations - Own and collaborate on technology/architecture decisions and conventions - Teach and learn from the team and the broader organization via mentorship, code review, knowledge sharing, etc. - Self-sufficiently manage project priorities, estimates, and deliverables What You'll Need: - At least five years of direct experience building commercial web applications in JavaScript/TypeScript - At least three years of that experience working directly on web UIs in a modern framework - At least one domain of deep technical expertise (e.g., web performance, design systems, framework knowledge, etc.) - Product sense, or a strong interest in developing it - Kind, thoughtful, and high-signal communication skills for both technical and non-technical audiences - Ability to translate ambiguous needs and constraints into clear technical requirements Technologies & Tools We Use: - Development : TypeScript, React, Next.js, Tailwind, LangGraph, AI SDK, Drizzle - Ops : Git, GitHub, Amazon EKS, AWS, Sentry, Langfuse, Prometheus At Kensho, we pride ourselves on providing top-of-market benefits, including: - Medical, Dental, and Vision insurance - 100% company paid premiums - Unlimited Paid Time Off - 26 weeks of 100% paid Parental Leave (paternity and maternity) - 401(k) plan with 6% employer matching - Generous company matching on donations to non-profit charities - Up to $20,000 tuition assistance toward degree programs, plus up to $4,000/year for ongoing professional education such as industry conferences - Plentiful snacks, drinks, and regularly catered lunches - Dog-friendly office (CAM office) - Bike sharing program memberships - Compassion leave and elder care leave - Mentoring and additional learning opportunities - Opportunity to expand professional network and participate in conferences and events