Senior Software Engineer, Frontend

LMArena
San Francisco, CA
Remote
Job Description
LMArena is seeking a Senior Frontend Product Engineer to lead the design and development of intuitive, AI-focused user experiences across our platform. The ideal candidate combines strong frontend craft with backend thinking, thrives on building polished user interfaces, and is excited to shape how people interact with cutting-edge AI models.

Requirements

  • 5+ years of experience in software engineering, with a focus on full-stack or frontend product development
  • Deep experience building accessible, responsive React/Next.js interfaces in production
  • Strong CSS fundamentals and familiarity with utility-first frameworks like Tailwind
  • Experience working with modern component systems such as ShadCN or similar design systems
  • Comfortable building and integrating backend APIs (bonus if you've worked with HonoJS or lightweight frameworks)
  • Proficient with relational databases such as Postgres, and how to extend schemas to support new features
  • Familiarity with testing practices and tools like Vitest (or similar testing frameworks)
  • Experience integrating analytics tools and using product metrics to guide iteration
  • Clear communicator and strong collaborator across design, product, and engineering teams

Benefits

  • Competitive compensation
  • Equity aligned to the markets where our team members are based
  • Comprehensive health and wellness benefits, including medical, dental, vision, and additional support programs
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