Full Stack Engineer

<div class="framer-nmjpis"> <div class="framer-1eby8y6" data-framer-name="Job title" data-framer-component-type="RichTextContainer"> <h3 class="framer-text framer-styles-preset-gjn94e" data-styles-preset="KbAUpl97U">About The Role</h3> </div> <div class="framer-as7117" data-framer-name="Summary" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb" data-styles-preset="SKu_rKZqD">RadixArk is building the infrastructure layer for frontier AI systems — unified inference, training, and evaluation stacks powering next-generation LLM applications at scale. Our platform integrates high-performance model serving, RL pipelines, and large-scale distributed systems across GPUs, TPUs, and emerging accelerators. We work at the intersection of systems engineering, AI research, and developer experience. We are looking for a world-class Full Stack Engineer who thrives in high-ambiguity environments and wants to build foundational tools for the next decade of AI.</p> </div> </div> <div class="framer-g3ip7c"> <div class="framer-8ko91k" data-framer-name="Job title" data-framer-component-type="RichTextContainer"> <h3 class="framer-text framer-styles-preset-gjn94e" data-styles-preset="KbAUpl97U">Requirements</h3> </div> <div class="framer-yai085" data-framer-name="Requirements" data-framer-component-type="RichTextContainer"> <h6 class="framer-text framer-styles-preset-qljc3"><strong class="framer-text">Technical Excellence</strong></h6> <ul class="framer-text"> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">4+ years of professional full stack engineering experience</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Based in Palo Alto, CA (Hybrid) / Remote (U.S.)</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Deep experience in:</p> <ul class="framer-text"> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb"><strong class="framer-text">Frontend:</strong> React / Next.js / TypeScript</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb"><strong class="framer-text">Backend:</strong> Python (FastAPI / Django) or Node.js</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">RESTful and/or gRPC API design</p> </li> </ul> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Strong understanding of distributed systems concepts</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Experience building systems that handle real-time streaming or high-throughput workloads</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Strong database design skills (Postgres, Redis, etc.)</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Familiarity with containerized environments (Docker, Kubernetes)</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Strong software engineering fundamentals: testing, CI/CD, version control, design reviews</p> </li> </ul> <h6 class="framer-text framer-styles-preset-qljc3">&nbsp;</h6> <h6 class="framer-text framer-styles-preset-qljc3">Bonus (High Impact)</h6> <ul class="framer-text"> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Experience building developer tools or infrastructure platforms</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Experience in ML infrastructure, model serving, or AI tooling</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Familiarity with observability stacks (Prometheus, Grafana, OpenTelemetry)</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Experience with WebSockets or streaming architectures</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Performance optimization at scale</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Experience building internal platforms used by engineers</p> </li> </ul> </div> </div> <div class="framer-svx6kq"> <div class="framer-1uoatoj" data-framer-name="Job title" data-framer-component-type="RichTextContainer"> <h3 class="framer-text framer-styles-preset-gjn94e" data-styles-preset="KbAUpl97U">Responsibilities</h3> </div> <div class="framer-y4b58j" data-framer-name="Responsibilities" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb"><strong class="framer-text">You will own end-to-end product surfaces across our developer platform:</strong></p> <ul class="framer-text"> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Design and implement high-performance web applications for AI infrastructure tooling</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Build scalable backend systems that interact with distributed inference and training services</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Architect APIs and service layers that serve enterprise and research customers</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Develop observability dashboards, experiment tracking UIs, and performance analytics tools</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Optimize real-time streaming interfaces for model inference workflows</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Work closely with ML engineers and infra teams to expose complex systems through intuitive product surfaces</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Lead architectural decisions for frontend-backend communication, state management, and performance tuning</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Ship production-grade features in fast iteration cycles</p> </li> </ul> <p class="framer-text framer-styles-preset-1g5o4kb">You will not just “write UI.”<br class="framer-text">You will build the control plane for frontier AI systems.</p> <p class="framer-text framer-styles-preset-1g5o4kb"><br class="framer-text"><br class="framer-text"><strong class="framer-text">Your work will directly power:</strong></p> <ul class="framer-text"> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Large-scale LLM inference systems</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Reinforcement learning training platforms</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Evaluation and experimentation frameworks</p> </li> <li class="framer-text framer-styles-preset-1g5o4kb" data-preset-tag="p"> <p class="framer-text framer-styles-preset-1g5o4kb">Developer-facing AI infrastructure products</p> </li> </ul> <p class="framer-text framer-styles-preset-1g5o4kb">This is not CRUD dashboard engineering.<br class="framer-text">This is building the operating system for AI builders.</p> </div> </div> <div class="framer-1vu7ugc"> <div class="framer-173q4gz" data-framer-name="Job title" data-framer-component-type="RichTextContainer"> <h3 class="framer-text framer-styles-preset-gjn94e" data-styles-preset="KbAUpl97U">About RadixArk</h3> </div> <div class="framer-1ndb85j" data-framer-name="About RadixArk" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb">RadixArk is an infrastructure-first company built by enggineers who've shipped production Al systems,created SGLang (20K+ GitHub stars,the fastest open LLM serving engine),and developed Miles(our large-scale RL framework).<br>We're on a mission to democratize frontier-level Al infrastructure by building world-class open systems for inference and training.<br>Our team has optimized kernels serving billions of tokens daily, designed distributed training systems coordinating 10,000+ GPUs, and contributed to infrastucture that powers leading Al companies and research labs.<br>We're backed by well-known infrastructure investors and partner with &nbsp;NVIDIA, Google,AWS,and frontier Al labs.<br>Join us in building infrastructure that gives real leverage back to the Al community.Compensation</p> </div> </div> <div class="framer-1xo2adc"> <div class="framer-3pynz3" data-framer-name="Compensation" data-framer-component-type="RichTextContainer"> <p>&nbsp;</p> </div> </div> <div class="framer-uwejmz"> <div class="framer-1oedabd" data-framer-name="Job title" data-framer-component-type="RichTextContainer"> <h3 class="framer-text framer-styles-preset-gjn94e" data-styles-preset="KbAUpl97U">Compensation</h3> </div> <div class="framer-1896wv9" data-framer-name="Equal Opportunity" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb">We offer competitive compensation with equity, comprehensive health benefits, and flexible work arrangements. Compensation is determined by location, level, and experience.</p> <p class="framer-text framer-styles-preset-1g5o4kb">&nbsp;</p> <h3 class="framer-text framer-styles-preset-1g5o4kb">Equal Opportunity</h3> <p class="framer-text framer-styles-preset-1g5o4kb">RadixArk is an Equal Opportunity Employer and is proud to offer equal employment opportunity to everyone&nbsp;regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and more.</p> </div> </div>