
LMArena: Open Platform for Crowdsourced AI Benchmarking. Free Chat and Vote at lmarena.ai/

LMArena: Open Platform for Crowdsourced AI Benchmarking. Free Chat and Vote at lmarena.ai/
Software Engineer (Frontend) at LMArena
Location: SF Bay Area/Remote
Type: Full-Time
About the Role: LMArena is seeking an experienced Senior Frontend Product Engineer to lead the design and development of intuitive, AI-focused user experiences across our platform. You’ll be responsible for owning features from proposing technical approaches and implementing core UI/UX flows, to deploying new functionality and tracking its impact through analytics. This role is ideal for someone who 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.
Who is LMArena? Created by researchers from UC Berkeley’s SkyLab, LMArena is an open platform where everyone can easily access, explore and interact with the world’s leading AI models. By comparing them side by side and casting votes for the better response, the community helps shape a public leaderboard, making AI progress more transparent, and grounded in real-world usage.
Why Join Us? Trusted by organizations like Google, OpenAI, Meta, xAI, and more, LMArena is rapidly becoming essential infrastructure for transparent, human-centered AI evaluation at scale. With over one million monthly users and growing developer adoption, our impact is helping guide the next generation of safe, aligned AI systems—grounded in open access and collective feedback.
Our work is regularly referenced by industry leaders pushing the frontier of safe and reliable AI. Sundar Pichai, Jeff Dean, Elon Musk, and Sam Altman.
Requirements:
Our Tech Stack:
What we offer:
Come help build the space where anyone can explore and help shape the future of AI.