Senior Fullstack Engineer

Kunya AI; San Francisco (CA); Hybrid; USD 220,000 - 280,000; Full time

Benefits offered by this job

Competitive salary

Equity upside

Hybrid work setup in San Francisco

Direct product impact

Job summary

Kunya AI in San Francisco is seeking a Senior Fullstack Engineer to own meaningful parts of our AI platform, shipping high-impact features across frontend, backend, and internal systems. You will work with product and design to craft intuitive experiences around AI capabilities and help raise engineering standards.

The role offers hybrid collaboration in San Francisco, competitive salary, equity upside, and a direct impact on meaningful AI product problems.

Qualifications

• 5+ years of hands-on production software experience.
• Strong fullstack capabilities across frontend and backend with APIs and databases.
• Ability to ship features from idea to production with clear tradeoffs.

Responsibilities

• Build and ship high-impact features across frontend, backend, APIs, and internal systems.
• Collaborate with product and design to create intuitive AI-enabled experiences.
• Improve performance, quality, and reliability in core user journeys.
• Design systems to support rapid iteration without accumulating complexity.

Skills

5+ years experience

Fullstack experience

Frontend & Backend

APIs

Databases

System design

Debugging production issues

Clear communication

Tools

APIs

Databases

System design

Production debugging

Job description

# Senior Fullstack EngineerFull-timeSan 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 mattersWe 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### 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-timeRemote (Global) · Remote$220,000–$280,000/yrView role### Senior Fullstack EngineerEngineeringFull-timeSingapore · Hybrid$220,000–$280,000/yrView role### Senior Fullstack EngineerEngineeringFull-timeWarsaw, Poland · Hybrid$220,000–$280,000/yrView role### Apply for this roleTakes about 2 minutes. Resume optional but recommended.