Senior Fullstack Engineer
kunya aiMillbrae (CA)
$220,000–$280,000/yr
Apply (opens in a new tab)Senior Fullstack Engineer
Posted yesterday
kunya aiMillbrae (CA)
SENIORITY
Lead
SALARY
$220,000–$280,000/yr
About the role
# Senior Fullstack Engineer Full-time San Francisco, CA · Hybrid$220,000–$280,000/yr
About the role:
RoleKunya is building an all-in-one AI platform: chat, images, video, voice, workspaces, and agents. We're looking for a Senior Fullstack Engineer who can build fast, think clearly, and own meaningful parts of the product from idea to production. This role is based in San Francisco with a hybrid setup. You'll work closely with a small team building AI-native software for people who want more leverage, more speed, and better tools.
What you'll do:
- Build and ship high-impact features across frontend, backend, APIs, and internal systems* Work closely with product and design to create intuitive experiences around powerful AI capabilities* Improve performance, quality, and reliability in core user journeys* Help design systems that support rapid product iteration without collapsing under complexity* Contribute across chat, media, voice, workspace, and agent-oriented product areas* Help raise the engineering bar through strong execution and technical judgment
Why this role matters We believe AI should expand human agency, not shrink it. That only happens if the product is genuinely useful, fast, and well-built. This role is central to making that real.
How we work* Small team, high trust* Serious ownership* Fast shipping with strong judgment* Hybrid collaboration in San Francisco
What we're looking for:
- 5+ years of experience building and shipping production software* Strong fullstack experience across modern frontend applications and backend services* Strong product instincts and ability to work from first principles* Experience with APIs, databases, production debugging, and system design* Ability to thrive in ambiguity and turn rough direction into shipped outcomes* Strong communication and collaborative habits
You may be a fit if you* Want to own real product surfaces, not just tickets* Move quickly without sacrificing thinking* Care about product, users, and technical quality equally* Want to build in a high-agency environment with a small team
Nice to have:
- Experience with AI infrastructure, media systems, or agent workflows* Startup experience* Experience mentoring engineers or shaping engineering culture
Benefits & perks:
What you get* Competitive salary* Equity upside* Hybrid work setup in San Francisco* High ownership and direct product impact* A small team working on meaningful AI product problems
What this is not* A heavily layered org* A ticket factory* A place where good ideas wait for permission
Other open roles
Senior Fullstack EngineerEngineeringFull-time Remote (Global) · Remote$220,000–$280,000/yrView role
Senior Fullstack EngineerEngineeringFull-time Singapore · Hybrid$220,000–$280,000/yrView role
Senior Fullstack EngineerEngineeringFull-time Warsaw, Poland · Hybrid$220,000–$280,000/yrView role
Apply for this role Takes about 2 minutes. Resume optional but recommended.
Before you apply
Applying takes about a minute. These four things decide how fast it moves after that.
Your profile is current
It's what we read first. Occupations, seniority and locations matter more than a long history.
Two examples you can talk through
Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.
A number in mind
What you're on now and what would make you move. We negotiate better when we know both.
Your notice period
Employers plan around it, and it's the question that stalls offers most often.
Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.