AMS Engineer

ABOUT OLIX AI is growing faster than any technology in history and the explosion in demand has created a massive infrastructure gap; we can no longer build chips or power stations fast enough to keep up. The industry is still leaning on a ten-year-old hardware blueprint that has reached its limit. A new paradigm that is faster and more efficient will be the biggest economic opportunity of the next century and create the most important company of the next decade. The OLIX Decode Accelerator 1 (DX-1) is the first accelerator architected specifically for decode. Rack-scale co-design of logic, data movement, packaging, optics and interconnect enables a step change in system level performance. THE ROLE We are designing silicon for a new and innovative breakthrough AI computing solution using optics and high-speed interconnect. Verifying the mixed-signal subsystems of this solution is one of the hardest and highest-leverage problems in the design flow and it is where this role sits. As a Senior Mixed-Signal Verification Engineer, you will own the verification of analog and mixed-signal blocks across our high-speed IO RX/TX chains - CDRs, phase interpolators and clock generation, DFE/CTLE equalization, samplers and slicers, deserializers, and the digital control loops that wrap around them. You will work at the boundary where analog behavior meets digital control, building the models, environments, and methodology that let us find bugs in silicon-accurate simulation rather than in the lab. RESPONSIBILITIES - Own the verification strategy and test plan for our mixed-signal subsystems, from block level through subsystem and top-level integration. - Define the modeling approach and fidelity tiers - decide what gets a real-number model, what needs Verilog-AMS, and where transistor-level co-sim is required - and document the accuracy/runtime trade-offs. - Develop and validate analog behavioral models against transistor-level references, owning the model-vs-schematic equivalence checks that keep the abstraction honest. - Build self-checking testbenches and reusable verification components for analog/digital interactions: CDR lock, adaptation and calibration loop convergence, mode and power-state transitions, clock dividers, deserializers, and clock-domain crossings. - Drive AMS co-simulation flows (Spice/FastSpice coupled with digital simulators) and own their setup, performance, and runtime trade-offs. - Define functional coverage and assertions that target analog corner behavior - saturation, overflow, polarity, loop stability, settling - not just digital state. - Debug and root-cause failures across the analog/digital boundary, including discrepancies between behavioral and transistor-level results, and drive them to closure. - Partner with analog and DSP designers to review specs, pin down interface contracts, and translate analog intent into checkable models, assertions, and tests. - Own block- and subsystem-level verification sign-off for tape-out, including coverage closure and a clear statement of what AMS did and did not verify (functional vs. performance). - Build and maintain regression infrastructure and flow automation, and improve AMS simulation throughput. - Contribute to silicon bring-up and lab correlation, feeding measured behavior back into model validation. SKILLS & EXPERIENCE - BS/MS in Electrical Engineering or related field, with 5+ years of analog/mixed-signal verification experience on complex SoCs or mixed-signal IP. - Hands-on expertise with AMS modeling and verification: Verilog-AMS and real-number modeling (SystemVerilog real / wreal), and analog-digital co-simulation flows (e.g., Spectre AMS, FastSpice coupled with a digital simulator). - Proficiency in SystemVerilog, with solid assertion-based verification skills and the ability to architect self-checking testbenches and reusable verification components. - Demonstrated ability to model analog blocks at the appropriate level of abstraction and to validate thos