[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Nokia jobs](https://jobs.opennash.com/companies/nokia/) · [Search jobs](/search/) Nokia · United States # Coherent Systems Architect - Mixed Signal AFE development United States On-site Listed on Nokia’s official careers site. Posted April 23, 2026. Check that it is still open and apply there. [Apply on Nokia’s careers site →](https://fa-evmr-saasfaprod1.fa.ocs.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/35004) [OpenNash Jobs](https://jobs.opennash.com/) / [Nokia](https://jobs.opennash.com/companies/nokia/) / Coherent Systems Architect - Mixed Signal AFE development ## Job description We are seeking a hands-on Coherent RF Architect to lead silicon bring-up, validation, and production test development for a mixed-signal Analog Front-End (AFE) featuring high-speed DACs, ADCs, PLL/clocking, and the RF electrical interface to the Transmitter and Receiver Optical Sub‑Assembly (TROSA) used in the optical coherent pluggable. The role owns end-to-end AFE characterization, from bench measurement and automation through correlation to simulation test coverage. NION2026 ## Responsibilities ### Key Responsibilities Silicon Bring-up & Debug Own first-silicon bring-up for DAC/ADC/PLL blocks: power-up sequencing, register access, clock tree bring-up, and initial functional validation. Debug mixed-signal issues across domains (clocking, analog biasing, digital control, interfaces, and test modes). Create debug playbooks and “known-good” procedures to accelerate lab triage and cross-team communication. ### Full AFE Characterization (Bench + Automation) DAC SFDR, IMD, THD, SNR, ENOB, spurs vs. output amplitude, output frequency, sampling frequency, temperature, supply, and code format; static linearity where applicable. ### ADC SNR, ENOB, SFDR, interleaving mismatch (offset/gain/timing), harmonic/spurious behavior, clock sensitivity. ### PLL/Clocking phase noise, integrated jitter, spur analysis, jitter transfer/tolerance where relevant to the system. ### AFE-level metrics frequency response, passband ripple, impedance/termination impact, crosstalk, noise coupling, and sensitivity to board/connector effects. Design experiments for PVT sweeps and margin analysis; develop guard-banding strategies aligned to production realities. RF characterization of TROSA Characterize RF electrical behavior of the Transmitter and Receiver Optical Sub‑Assembly, including bandwidth, frequency response, impedance matching, insertion and return loss, Gain, noise figure (where applicable), and linearity. Work closely with photonics, SiGe IC, and module teams to correlate electrical AFE performance to optical metrics. Support electro‑optical (E/O) and opto‑electrical (O/E) RF validation for coherent transmit and receive chains. Measurement Infrastructure & Data Analytics Build and maintain automated measurement systems using Python and standard instrument control (SCPI/ PyVISA). ### Use robust data practices versioned test scripts, metadata capture, calibration traceability, and reproducible analysis notebooks. Create dashboards/reports summarizing performance trends, correlations, and anomalies. Cross-Functional Collaboration & Requirements Work with design teams to define: test hooks, observability, calibration registers, and design-for-test requirements for analog blocks. Define measurable acceptance criteria aligned to coherent system requirements. Collaborate closely with Analog/RF design, SiGe IC teams, DSP, Signal Integrity (SI), photonics, module, and manufacturing teams. ## Qualifications ### Required Qualifications Ph.D. in Electrical Engineering or Applied Physics with experience in mixed-signal silicon test/validation/characterization, high-speed electronics or systems. Strong fundamentals in high speed electronics and practical experience with test equipment such as high bandwidth oscilloscopes, phase noise analyzer, spectrum analyzer, VNA. Experience characterizing high-speed RF and mm-wave interconnects, amplifiers, and components Solid automation skills in Python including data pipelines and plotting. Ability to read schematics, understand board-level effects, and debug signal integrity/power integrity interactions. ### Comfortable in a fast-moving lab environment hands-on probing, rework coordination, fixture bring-up ### Preferred Qualifications Experience with optical coherent systems and coherent transceiver architectures. Experience with MZ modulator drivers (MZMD) and TIAs in coherent links. Experience with high‑speed data converters, interleaved ADCs, and calibration techniques. ## At a glance - Posted by the employer: Apr 23, 2026 - First seen by OpenNash: Oct 13, 2026 - Last checked: Oct 20, 2026 - Listed for: 180 days - Location: United States - Work arrangement: On-site[Apply on Nokia’s careers site →](https://fa-evmr-saasfaprod1.fa.ocs.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/35004) ## More jobs at Nokia ### [AI-Agent Development Co-op](https://jobs.opennash.com/companies/nokia/jobs/4ef3d2983681ea8cef20/) United States ### [ASIC Verification Manager](https://jobs.opennash.com/companies/nokia/jobs/9f3256adf48fda37de2e/) United States ### [Coherent Systems Architect - Optical Modem Development and Optimization](https://jobs.opennash.com/companies/nokia/jobs/7bc04db412161546e7f6/) United States ### [Coherent Systems Architect - Optical Modem Modeling and Specification](https://jobs.opennash.com/companies/nokia/jobs/283880185bb93fea5ba1/) United States ### [Corporate Development Senior Associate](https://jobs.opennash.com/companies/nokia/jobs/98ad5087a7c08f2c657f/) United States ## Similar jobs at other companies ### [Power Systems Architect](https://jobs.opennash.com/companies/oracle/jobs/65dbb06a3e3de20c824f/) Oracle · United States ### [Systems Architect](https://jobs.opennash.com/companies/vertiv-holdings/jobs/2c0f5ce355f21403acad/) Vertiv Holdings · United States ### [Staff Systems Architect (Systems Engineer)](https://jobs.opennash.com/companies/northrop-grumman/jobs/259739d93077f5d21e01/) Northrop Grumman · United States-California-El Segundo ### [Principal Radar Systems Architect](https://jobs.opennash.com/companies/lockheed-martin/jobs/3110ad621e0460909baf/) Lockheed Martin · Moorestown, NJ ### [Systems Architect Sr - E3](https://jobs.opennash.com/companies/lockheed-martin/jobs/76e46ce627615202560a/) Lockheed Martin · Orlando, FL OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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