Software Engineer, Product

<div data-page-id="UcaUdSLZhoKzPMxYEYXjgxFBpId" data-lark-html-role="root" data-docx-has-block-data="false"> <h3 class="heading-3 ace-line old-record-id-WRqIdxdJOo34IMxeklfjIZE2peb">About the Role</h3> <div class="ace-line ace-line old-record-id-OjfRdBDvzoidnZxjUUvjgBDbpTg">RadixArk is seeking experienced product-focused engineers to join our team in building the developer-facing surfaces of our inference and training infrastructure. As a Software Engineer, Product, you will partner closely with our Product Managers, research scientists, and systems engineers to turn cutting-edge AI infrastructure into delightful, performant, and reliable products that developers and enterprises love to use.</div> <div class="ace-line ace-line old-record-id-UUIYdbvBto1eJIxLwFFj79OLpGT">You will own end-to-end product experiences across APIs, SDKs, dashboards, playgrounds, and developer tooling that sit on top of SGLang, Miles, and our broader inference and training stack. You'll work at the intersection of frontier systems and great product craft, shaping how developers discover, evaluate, and integrate RadixArk's capabilities into their own AI workloads. If you are excited about translating cutting-edge infrastructure into products that meaningfully shape how the AI community builds, this role is for you.</div> <h3 class="heading-3 ace-line old-record-id-PDO5dq3pYoytEJxgutrjlpwIpEd">Key Responsibilities</h3> <div class="ace-line ace-line old-record-id-OEPMdAsVmo5QdGxsTfojHpxDpng"><strong>Product Engineering &amp; Execution</strong></div> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-ZtChd5XtForgA9xKIw1jXuEcp1c" data-list="bullet"> <div>Collaborate with cross-functional teams (Product, Design, Research, Infrastructure, Developer Relations) to design and ship developer-facing products on top of RadixArk's inference and training platforms.</div> </li> <li class="ace-line ace-line old-record-id-MGzKdzqmAohf0Wxse7vjQ1cRpC2" data-list="bullet"> <div>Build and maintain customer-facing APIs, SDKs, CLIs, dashboards, and playgrounds that expose the power of SGLang, Miles, and our serving infrastructure in intuitive, well-documented interfaces.</div> </li> <li class="ace-line ace-line old-record-id-MAwGdgsWaoGSCZxyiXfjLp2Tpfe" data-list="bullet"> <div>Implement custom user interfaces and developer experiences using modern frontend and backend technologies, with a high bar for performance, accessibility, and craft.</div> </li> <li class="ace-line ace-line old-record-id-FXYpdd32coaSW6xcPQbjSnmnpEe" data-list="bullet"> <div>Architect efficient and scalable systems that bridge low-level infrastructure (GPU scheduling, model serving, distributed training) with high-level product surfaces.</div> </li> <li class="ace-line ace-line old-record-id-Bd3tdlRS9oEAaIxCDIsjy0J6pif" data-list="bullet"> <div>Analyze and optimize code for quality, efficiency, and performance, and provide thoughtful feedback to peers during code reviews.</div> </li> </ul> <div class="ace-line ace-line old-record-id-DE7GddMTIoFm7WxuKIpjCcDSpBf"><strong>Technical Leadership &amp; Ownership</strong></div> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-Fp7EdoRylop9DcxGHbEjVdkapbf" data-list="bullet"> <div>Establish end-to-end ownership of components, features, or systems, from initial design through rollout, monitoring, and iteration.</div> </li> <li class="ace-line ace-line old-record-id-TIhBdcBN5oXSCPxxprmjwkxVpqg" data-list="bullet"> <div>Set direction and goals for product engineering initiatives, lead major launches, and provide technical guidance and mentorship to peers and new team members.</div> </li> <li class="ace-line ace-line old-record-id-GIuFd5iTnoKi9nxmiFsjSGDepeg" data-list="bullet"> <div>Identify and resolve performance, reliability, and scalability issues across the product stack, and drive efforts to reduce technical debt.</div> </li> <li class="ace-line ace-line old-record-id-P3ChdAOkKovfv3xHxc5jCwN6pah" data-list="bullet"> <div>Participate in design reviews and technical discussions, evaluating trade-offs between system complexity, developer experience, and time-to-ship.</div> </li> </ul> <div class="ace-line ace-line old-record-id-CtKCdBhhOo1T6BxhR6pjSNThpwI"><strong>Partnership with Product &amp; Users</strong></div> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-I8BbdnrtxoAymIxwnMgjAwLspTc" data-list="bullet"> <div>Work hand-in-hand with Product Managers to translate roadmap priorities into well-scoped technical deliverables, surfacing trade-offs and unblocking ambiguity early.</div> </li> <li class="ace-line ace-line old-record-id-Rqp0dlKpPo6u7yx22Zij54VEpNb" data-list="bullet"> <div>Engage directly with early adopters, design partners, and the open-source community to understand pain points and rapidly iterate on product experiences.</div> </li> <li class="ace-line ace-line old-record-id-Zur4dw1DWooz8Jx3yUNj3ubIpTg" data-list="bullet"> <div>Contribute to technical content (documentation, code samples, blog posts, demos) that helps developers get the most out of RadixArk's products.</div> </li> <li class="ace-line ace-line old-record-id-IRfPdOSvUoqyPGxDhfdjJrpLp2c" data-list="bullet"> <div>Use data, telemetry, and user feedback to validate hypotheses, measure the impact of launches, and inform what to build next.</div> </li> </ul> <h3 class="heading-3 ace-line old-record-id-O0bAdxfXwo04q0xJ2HWjQVGvpfe">Qualifications</h3> <h4 class="heading-4 ace-line old-record-id-NTo4dCae5oqYDhxyFnKjJnUsp5f">Minimum Requirements</h4> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-CxQNdCtlooUSVTxkXHjjjSKapmg" data-list="bullet"> <div>Bachelor's degree in Computer Science, Computer Engineering, a relevant technical field, or equivalent practical experience.</div> </li> <li class="ace-line ace-line old-record-id-GzIhdcbroortdsxtjjxjpu2RpZb" data-list="bullet"> <div>5+ years of software engineering experience building production systems, OR 3+ years with a PhD in a relevant field.</div> </li> <li class="ace-line ace-line old-record-id-ZyHidyhinoVenPxAC54jvWTDpfg" data-list="bullet"> <div>Strong programming skills in at least one of: Python, TypeScript/JavaScript, Go, C++, or Rust.</div> </li> <li class="ace-line ace-line old-record-id-ZOqPdTxPtof4r3xTPEWjI6F8pt2" data-list="bullet"> <div>Demonstrated experience shipping developer-facing or product-facing software end-to-end, including APIs, SDKs, web applications, or developer tools.</div> </li> <li class="ace-line ace-line old-record-id-VhqmdhkMCo86wFxeVtpjIbNGpLc" data-list="bullet"> <div>Experience using data and analysis to explain technical problems, prioritize work, and inform design decisions.</div> </li> <li class="ace-line ace-line old-record-id-S745dL6MYoeWoDx8ErRjhzbDpEd" data-list="bullet"> <div>Excellent collaboration and communication skills, with a track record of driving complex technical projects across teams.</div> </li> </ul> <h4 class="heading-4 ace-line old-record-id-K50pdo4V1o8vFsxgEvqj6DulpHc">Preferred Qualifications</h4> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-PRRrdYbIVoOSZaxsSVBjfEU5pHd" data-list="bullet"> <div>Experience building products on top of AI/ML infrastructure, model serving systems, or large-scale distributed systems.</div> </li> <li class="ace-line ace-line old-record-id-X9XQd0AFZogyAsxyo78jgpB5plh" data-list="bullet"> <div>Familiarity with LLM inference and training stacks (e.g., SGLang, vLLM, TensorRT-LLM, PyTorch, Megatron, DeepSpeed, Ray) and the trade-offs involved in serving and training large models.</div> </li> <li class="ace-line ace-line old-record-id-PEcAd8oruoI7BzxIsvFjXGE5poe" data-list="bullet"> <div>Experience contributing to or maintaining open-source projects, especially in the AI/ML or infrastructure ecosystem.</div> </li> <li class="ace-line ace-line old-record-id-RaxNdDQWaoJWjgxNqBCjFMaMpad" data-list="bullet"> <div>Hands-on experience designing developer experiences such as public APIs, SDKs, CLIs, or dashboards, where developer ergonomics directly drive adoption.</div> </li> <li class="ace-line ace-line old-record-id-CAEXdMNEroh1R6xNVIVjmc82pXe" data-list="bullet"> <div>Strong product sensibility, comfortable making thoughtful UX and API design decisions rather than just executing specs.</div> </li> <li class="ace-line ace-line old-record-id-H18XdQuqPoYF3WxNzVJjrg2Op1b" data-list="bullet"> <div>Experience improving quality through code reviews, testing, careful rollout, monitoring, and proactive iteration.</div> </li> <li class="ace-line ace-line old-record-id-KMDNdKgDXo13CzxdrhVjO7kGp6e" data-list="bullet"> <div>Demonstrated ability to integrate AI tools into engineering workflows to drive measurable impact (efficiency gains, quality improvements).</div> </li> <li class="ace-line ace-line old-record-id-JPg5dfbryooYRFxo1wEjgqedpff" data-list="bullet"> <div>Experience working in B2B, developer-facing, or infrastructure product environments.</div> </li> </ul> <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&nbsp;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 givees real leverage back to the Al community.</p> </div> </div> <div class="framer-1xo2adc"> <div class="framer-1ouiht" 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-3pynz3" data-framer-name="Compensation" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb">We offer competitive compensation for this 1-year residency program, with health benefits and potential for conversion to a full-time role. Compensation is determined by location and prior experience. Strong residents may receive offers to join RadixArk full-time with equity after program completion.</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">Equal Opportunity</h3> </div> <div class="framer-1896wv9" data-framer-name="Equal Opportunity" data-framer-component-type="RichTextContainer"> <p class="framer-text framer-styles-preset-1g5o4kb">RadixArk is an Equal Opportunity Employer and is proud to offer equal employment opportunity to everyone 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> </div>