Senior Principal Electrical Engineer

Coherent; Hyderabad; On-site; INR 3,500,000 - 6,500,000; Full time

Job summary

Coherent in Hyderabad, India, seeks an experienced hardware architect to lead RF/microwave and high-speed mixed-signal design for next-gen optical transceivers. You will own 100G+/lane interconnects, specify PCB stackups, and drive EMI/thermal performance while partnering across firmware, optics, and manufacturing teams.

The ideal candidate has 15+ years in RF/microwave and high-speed hardware design, with hands-on PCB layout and test equipment expertise, and a Masters degree in a related field.

Qualifications

• 15+ years experience designing RF/microwave, high-speed mixed-signal, analog, and digital hardware.
• 15+ years hands-on schematic and PCB layout guidance, bring-up and verification for complex PCBAs.
• 15+ years designing/test equipment, automation fixtures, or instrumentation for high-performance electronics.
• Deep knowledge of high-speed PCB design with impedance control, crosstalk, skew, and return loss.
• RF/microwave practices: controlled impedance lines, RF launches, shielding, grounding.
• Expertise selecting materials and stackups for high-frequency applications.
• Strong command of precision analog design and sensing, ADC/DAC interfaces, calibration.
• Masters degree in Electrical/Electronics/Computer Engineering; advanced degree preferred.

Responsibilities

• Lead RF/microwave and high-speed hardware architecture for optical transceivers and test hardware.
• Design schematics and PCBAs for 100G/lane to 400G/lane interconnects and future generations.
• Own board-level tradeoffs: signal integrity, power integrity, EMI/EMC, thermal, manufacturability.
• Architect instrumentation for validation, calibration, automation, and manufacturing test.
• Define PCB stackups, materials, copper weights, impedance targets and fabrication rules.
• Collaborate with SI/PI, packaging, optics, firmware, software, mechanical, and manufacturing teams.
• Lead schematic capture, layout reviews, design verification, bring-up, debug, and release.
• Develop validation plans, test methods, and production screening for high-volume test environments.
• Capture architecture specifications and create thorough design documentation.
• Mentor engineers and drive hardware design best practices across programs.

Skills

RF design

Microwave

High-speed PCB

Signal integrity

EMI/EMC

Thermal analysis

DFT/DFM

Mentoring

Documentation

Vendor liaison

Education

Master's degree in Electrical Engineering

Advanced degree preferred

Tools

VNA

Oscilloscopes

Spectrum analyzers

BERTs

Automated test systems

Test equipment

Job description

Role & responsibilities

• Lead complete RF/microwave and high-speed mixed-signal hardware architecture for next-generation optical transceivers, evaluation boards, reference platforms, and production test hardware.
• Design high-speed schematics and PCBAs for 100G/lane, 200G/lane, 400G/lane and beyond interconnects, supporting 800G, 1.6T, 3.2T and future architectures where applicable.
• Own board-level tradeoffs for signal integrity, power integrity, EMI/EMC, grounding, return path control, isolation, thermal performance, manufacturability, serviceability, cost, reliability, and schedule.
• Architect and design high-performance instrumentation used for validation, characterization, calibration, automation, manufacturing test, and sustaining support of fiber optic transceiver modules.
• Select and qualify high-speed, RF, microwave, analog, precision measurement, clocking, DSP, control, sensing, connector, cable, interconnect, and power components.
• Define PCB stackups, materials, copper weights, dielectric selection, via structures, backdrill strategy, impedance targets, loss budgets, fabrication rules, assembly constraints, and acceptance criteria.
• Partner with SI/PI, packaging, optics, firmware, software, mechanical, thermal, reliability, manufacturing, supply chain, and operations teams to deliver complete product and test solutions.
• Lead schematic capture, layout strategy, layout review, RF structure review, BOM review, DFM/DFT review, design verification, bring-up, debug, characterization, and production release.
• Define digital control interfaces and hardware/firmware interaction requirements for CPLDs, FPGAs, microcontrollers, DSPs, drivers, TIAs, modulators, lasers, sensors, ADCs, DACs, and power controllers.
• Develop validation plans, test methods, calibration approaches, correlation methods, guardband strategies, and production screening methods for high-volume test environments.
• Perform hands-on lab measurements and debug using oscilloscopes, VNAs, spectrum analyzers, BERTs, pattern generators, optical power meters, optical spectrum analyzers, thermal chambers, power supplies, SMUs, and automated test systems.
• Lead design reviews, risk reviews, failure analysis, root cause analysis, corrective actions, and lessons-learned across programs.
• Mentor senior and mid-level engineers; establish hardware design best practices, checklists, libraries, reuse blocks, and review criteria.
• Engage with suppliers and technical partners on advanced components, connectors, PCB materials, laminates, cable assemblies, sockets, fixtures, and precision measurement technologies.
• Support critical customer discussions, roadmap evaluations, architecture tradeoffs, and executive-level technical reviews as required.

Preferred candidate profile

• 15+ years of direct experience designing RF/microwave, high-speed mixed-signal, analog, digital, and precision measurement hardware.
• 15+ years of hands-on schematic, PCB layout guidance, bring-up, debug, and verification experience for complex high-speed PCBAs.
• 15+ years of experience designing or architecting test equipment, validation hardware, manufacturing test boards, automation fixtures, or instrumentation for high-performance electronics and/or optical communications.
• Deep knowledge of high-speed PCB design for very-low-loss channels, including impedance control, crosstalk, skew, return loss, insertion loss, via transitions, connectors, cable launches, package breakout, return current, and reference plane management.
• Proven understanding of RF/microwave design practices including controlled impedance transmission lines, RF launches, baluns, couplers, filters, attenuators, terminations, clock distribution, shielding, isolation, and grounding.
• Expertise selecting PCB materials and stackups for high-frequency applications, including Rogers, Panasonic and equivalent low-loss laminate families, hybrid stackups, prepreg/core choices, resin systems, glass weave effects, fabrication tolerances, and cost/performance tradeoffs.
• Strong command of precision analog design including low-noise sensing, voltage/current/temperature measurement, ADC/DAC interfaces, op amps, references, power monitoring, calibration, offset/gain error, noise, drift, and thermal effects.
• Experience with optical module and networking ecosystems including OSFP, QSFP-DD and earlier MSA form factors; familiarity with CPO, XPO, NPO and 3.2T-class architecture challenges is strongly preferred.
• Ability to evaluate high-speed ICs, drivers, TIAs, DSPs, retimers, clocking devices, power devices, sensors, controllers, and RF/microwave components across major suppliers.
• Ability to create clear engineering documentation including architecture specifications, schematics, layout guidance, design review packages, validation plans, test reports, BOM rationale, risk registers, and manufacturing release documentation.
• Masters degree in Electrical Engineering, Electronics Engineering, Computer Engineering or related technical discipline; advanced degree preferred.