DSP Algorithms Engineer – System Level Testing (Coherent Optical)

Austin, TX - USA

Monthly Salary: Not Disclosed

Posted on: 8 hours ago

Vacancies: 1 Vacancy

Job Summary

DSP Algorithms Engineer System Level Testing (Coherent Optical)

Location: Austin TX (On-site 5 days/week Mandatory)
Employment Type: Full-time
Visa Status: H1-B Sponsorship Available USC / GC Welcome
Interview Process: 3 Rounds 2 Weeks
Relocation: Depends
Equity: Yes (discussed post-selection)

Role Overview

We are seeking a senior-level DSP Algorithms Engineer to own system-level performance verification of advanced coherent optical DSP prior to silicon tape-out.

This is a problem-centric high-impact individual contributor role focused on breaking designs before it is too late to fix them. The engineer will act as the final technical line of defense against latent algorithmic and system-level issues by stressing DSP designs under realistic and worst-case optical scenarios.

This role is not tool-driven not QA-focused and not a ramp-up position-it requires deep hands-on optical DSP expertise from day one.

Key Responsibilities

System-Level DSP Verification & Stress Testing

Own end-to-end system-level performance verification across the Tx fiber Rx signal chain.
Design and execute aggressive stress tests corner cases and adversarial scenarios to expose algorithmic weaknesses prior to tape-out.
Focus on robustness validation and bug discovery not basic functional or feature validation.

Optical Channel & Impairment Modeling

Build and maintain realistic optical channel models including fiber propagation effects and physical impairments.
Model impairments such as dispersion non-linearities noise and laser-related effects.
Translate real-world optical behavior into actionable system-level test scenarios.
Continuously refine models to reflect worst-case and edge-case deployment conditions.

Algorithm-Aware Verification

Leverage deep DSP algorithm knowledge to intentionally attack known weak points.
Collaborate closely with DSP algorithm designers to:
- Define performance metrics acceptance criteria and failure thresholds
- Interpret failures in the context of algorithmic intent and system trade-offs
- Drive root-cause analysis and corrective action recommendations

Frameworks Automation & Analysis

Develop and maintain flexible system-level test frameworks (MATLAB C/C Python SystemC or equivalent).
Automate regression testing and performance analysis to enable rapid iteration.
Produce clear documentation covering:
- Test methodology and assumptions
- Coverage gaps
- Performance trends and risk areas

Ownership & Autonomy

Operate as a self-directed individual contributor within a globally distributed team.
Serve as a domain expert contributing deep technical knowledge rather than learning fundamentals on the job.

Minimum Qualifications (Must-Haves)

Deep expertise in coherent optical communications DSP with hands-on experience in real optical systems (expertise not exposure).
Proven background in DSP algorithm development and system-level verification preferably in pre-silicon environments.
Strong understanding of:
- Optical fiber channel behavior and physical impairments
- Coherent receiver architectures and DSP signal processing chains
Extensive experience with DSP simulation and modeling using:
- MATLAB C/C Python SystemC or equivalent
Ability to independently define execute and interpret complex verification strategies.
Bachelors Masters or PhD in Electrical Engineering or related field (degree level secondary to demonstrated expertise).
Experience in commercial/industrial environments (not purely academic research).
Ability to work on-site in Austin TX five days a week (mandatory).

Preferred Qualifications (Nice-to-Haves)

RTL-level understanding or familiarity with hardware implementation flows.
Experience with analog front-end (AFE) behavior and DSP interaction.
Exposure to:
- Fixed-point modeling
- ASIC / DSP implementation considerations
- FEC schemes (LDPC RS OFEC)
- Mixed-signal effects such as jitter PLL and CDR behavior

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DSP Algorithms Engineer System Level Testing (Coherent Optical) Location: Austin TX (On-site 5 days/week Mandatory) Employment Type: Full-time Visa Status: H1-B Sponsorship Available USC / GC Welcome Interview Process: 3 Rounds 2 Weeks Relocation: Depends Equity: Yes (discussed post-select...