ML Systems Engineer, Model Architectures (Mid/Senior/Principal) at Positron Corporation
United States
$160k - $350k
<div><body><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:0pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Role Overview</strong></b></h2><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">As a ML Systems Engineer, you will be the engineer who gets new model architectures running on our hardware first, in simulation, before RTL or silicon exists. You will work with chip architects, the compiler and SDK teams, and customers to understand what each new architecture demands of the hardware and to make sure our simulators can execute it bit-exactly.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px 11.25pt;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">The work is implementation-heavy: new attention variants, mixture-of-experts, embeddings, and quantization formats, implemented in our simulator and verified against reference frameworks. You will set the standard turnaround for bringing up a new model and drive toward making that path fully automated.</span></p><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:0pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Key Responsibilities</strong></b></h2><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Simulator Implementation</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Implement the operators, numerics, and memory layouts that new model architectures need in our simulator, bit-exact against a reference implementation.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Extend simulator coverage across the full inference path, including prefill and decode, embeddings, attention variants (grouped-query, gated, linear, and sparse), mixture-of-experts routing, and quantized formats.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Maintain reference comparisons and regression coverage so model support stays correct as the simulator and hardware evolve.</span></li></ul><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Architecture Evaluation</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Evaluate new architectures before hardware exists, identifying what they require of compute, memory, and data movement and what the chip would need to change.</span></li></ul><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Customer Model Bring-Up and Automation</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Bring customer models up in simulation ahead of emulator and hardware runs, and own the turnaround time for doing so.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Partner with the agentic tooling engineer to automate new-model bring-up end to end, from model specification to simulator coverage.</span></li></ul><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:11.25pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Required Qualifications</strong></b></h2><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">4+ years of experience as an ML systems or inference engineer.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">A strong understanding of transformer internals at the operator level, including attention variants, mixture-of-experts, embeddings, KV cache, and quantization (INT8 and FP8).</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Demonstrated experience implementing or porting model inference by hand in PyTorch, llama.cpp, vLLM, TensorRT-LLM, or a custom runtime.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Hands-on experience debugging numerical mismatches against a reference down to the operator and the bit.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Ability to read a model architecture paper and turn it into a working, verified implementation.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Strong Rust skills, or expert-level C/C++ skills and a willingness to work in Rust day to day, along with strong Python skills for model and reference work.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Excellent communication skills, with the ability to explain what a new architecture needs from the hardware and where the current design falls short.</span></li></ul><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:11.25pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Preferred Qualifications</strong></b></h2><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Experience mapping models onto accelerator hardware or writing kernels for a non-GPU architecture.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Prior experience serving as the technical point of contact for customer model requests.</span></li></ul><h3 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:21pt;font-weight:600;letter-spacing:0.25px;margin-top:12pt;margin-bottom:12pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:14pt;white-space:pre-wrap;">Leveling & Scope</strong></b></h3><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px 11.25pt;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">While this role is currently posted at a specific level, we are a growth-oriented organization and are open to hiring at a more senior level for the right candidate. Please note that this job description serves as a focused but generalized overview of the role; specific responsibilities and impact expectations will be tailored to the experience and seniority of the final hire.</span></p><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:0pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Why Join Us?</strong></b></h2><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">You will be the first engineer to run each new frontier model architecture on our hardware, and your findings will feed directly into how our next chips are designed.</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">You will build the path toward fully automated model bring-up, working across chip architecture, compiler, SDK, and customer teams.</span></li></ul><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:11.25pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Compensation & Benefits</strong></b></h2><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">The base salary range for this role is; Mid: $160,000-$220,000, Senior: $220,000–$270,000, Principal: $270,000-$350,000.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.6;letter-spacing:0.25px;margin:4px 0px;padding:0px;'><br></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Please note that the figures provided represent the base salary range only and do not include other elements of our total compensation package, equity, or comprehensive benefits.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.6;letter-spacing:0.25px;margin:4px 0px;padding:0px;'><br></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px 11.25pt;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">At Positron AI, we value the unique expertise each candidate brings. While the range above reflects our typical expectation for the position, we reserve the flexibility to exceed this range for candidates whose specialized skills, significant experience, or unique qualifications fall outside the standard scope of the role. Final offers are determined based on a variety of factors, including internal equity, and individual impact.</span></p><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:0pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Benefits & Perks</strong></b></h2><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">We want you to do your best work and feel confident that you and your family are taken care of. That means comprehensive coverage, real time to rest, and support for your future.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Health and wellness</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Fully company-paid medical, dental, and vision insurance for you and your dependents</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Company-paid life and disability coverage, with voluntary options to add more</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Supplemental hospital, critical illness, and accident coverage available</span></li></ul><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Time off and flexibility</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Unlimited paid time off; we encourage everyone to truly unplug and recharge</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">13 paid company holidays</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Remote-first culture with a company-provided computer and home office setup</span></li></ul><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Compensation and future</strong></b></p><ul style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;margin:8px 0px;line-height:1.6;padding:0px 0px 0px 32px;list-style-type:disc;'><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Competitive salary and equity</span></li><li style="color:rgb(0,0,0);margin:0pt 0px;font-size:11pt;line-height:1.2;letter-spacing:0.25px;"><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">401(k) with company matching, eligible from day one</span></li></ul><h2 style='font-family:"Basel Grotesk",Arial,sans-serif;line-height:1.2;font-size:29pt;font-weight:600;letter-spacing:0.5px;margin-top:11.25pt;margin-bottom:11.25pt;padding-left:0px;'><b><strong style="color:rgb(0,0,0);font-size:18pt;white-space:pre-wrap;">Visa Support</strong></b></h2><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">This position is open to candidates currently authorized to work in the U.S. We cannot provide new visa sponsorship for this role but are open to facilitating H-1B visa transfers for eligible candidates.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.6;letter-spacing:0.25px;margin:4px 0px;padding:0px;'><br></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.2;letter-spacing:0.25px;margin:0pt 0px;padding:0px;'><b><strong style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;">Equal Opportunity Employer.</strong></b><span style="color:rgb(0,0,0);font-size:11pt;white-space:pre-wrap;"> If you're excited about the role but don't meet every bullet, we'd still love to hear from you.</span></p><p style='font-family:"Basel Grotesk",Arial,sans-serif;font-size:11pt;font-weight:400;line-height:1.6;letter-spacing:0.25px;margin:4px 0px;padding:0px;'><br></p></body></div>
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