Principal / Lead DSP & Systems Architect — Ultra High-Speed SerDes

Architecture & Roadmap: Define DSP and system architecture for 448G and post-448G SerDes IP across electrical and optical interfaces — including ADC/DAC-based transceiver partitioning, modulation choice (PAM4/PAM6, IM-DD, coherent), and FEC strategy — and shape long-term roadmap toward 1.6T and 3.2T link aggregates.

Customer & Standards Engagement: Lead technical engagement with hyperscale, AI accelerator, and optical module customers; represent the company in OIF CEI, IEEE 802.3, and related standards activities.

End-to-End Link Modeling: Build and maintain MATLAB/Python models of the full link across electrical and optical media: channel response (backplane, copper cable, chip-to-chip, fiber), TX/RX impairments, jitter (RJ/DJ/BUJ), crosstalk, reflections, optical impairments (CD, PMD, laser phase noise, optical SNR), ADC/DAC quantization, and FEC performance under realistic BER/FLR targets.

DSP Algorithm Architecture: Own the DSP pipeline across electrical and optical paths — FFE, DFE, MLSE/MLSD, CTLE-DSP partitioning, adaptive equalization (LMS, sign-sign LMS, blind adaptation), timing recovery and CDR, baseline wander correction, IQ/skew calibration, PAM demapping, and integration with KP4 / concatenated / soft-decision FEC. For optical links, additionally drive chromatic dispersion (CD) compensation, polarization demultiplexing, carrier phase and frequency recovery, and nonlinear compensation.

Mixed-Signal Co-Design: Drive ADC/DAC architectural decisions — sample rate, resolution (ENOB), time-interleaving, calibration strategy — and align analog front-end, CTLE, and clocking specs with DSP performance budgets.

Fixed-Point & Implementation Trade-offs: Drive wordlength optimization, parallelism and pipelining strategies for multi-hundred-GSps datapaths, and float-to-fixed methodology to balance BER performance, area, and pJ/bit power efficiency.

Specifications & Cross-Domain Integration: Generate block-level specs for DSP datapaths, FEC, calibration, ADC/DAC, AFE, and clocking; align decisions across digital, mixed-signal, packaging, and SI/PI domains.

DSP-to-RTL Handoff: Translate DSP reference models into hardware-friendly architectures with bit-true/cycle-accurate alignment, and partner with RTL and verification teams on micro-architecture, latency, and memory trade-offs.

Silicon Bring-up & Validation: Partner with validation and lab teams to correlate post-silicon BER, eye, and link-training results with modeled assumptions; define KPIs (BER, FLR, link margin, power, latency) and debug methodologies.

Mentorship & Thought Leadership: Guide DSP, systems, and hardware engineers; develop reusable models and best practices; contribute to architecture reviews, IP innovation strategy, and customer-facing technical engagements.