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Urgent! RF Engineer - Power Amplifier Design Job Opening In Singapore, Singapore – Now Hiring Doodle Labs LLC

RF Engineer Power Amplifier Design



Job description

RF Engineer – Power Amplifier Design
Location:
On site
Company:
Doodle Labs – Robotics and Defense Technology
About Doodle Labs
Doodle Labs is a fast-growing technology company at the forefront of robotics and defense innovation.

We build mission-critical communication systems that enable autonomous systems to operate in challenging environments.

Our solutions are deployed worldwide in defense, industrial, and commercial applications, providing robust connectivity in demanding conditions.


We are seeking a
Radio Frequency (RF) Engineer
with a focus on
Power Amplifier (PA) Design
to lead the development of high-efficiency, high-linearity RF PA modules from concept through to production.


About the Job
The
RF Engineer – PA Design
will design, simulate, validate, and optimize power amplifier circuits operating between 0.2 and 7 GHz, with output power up to 50W.

This role will be hands-on with testing, debugging, load-pull analysis, and documentation, and will require deep collaboration with system and hardware teams to deliver high-performance modules for advanced wireless systems.


What You’ll Do
1.

Design and Develop PA Circuits
Lead PA module development including topology selection, schematic capture, and PCB layout.


Design for efficiency, gain, and linearity across a broad frequency spectrum.


Apply advanced impedance matching, stability analysis, and EM simulation techniques.


2.

Simulation and Validation
Use simulation tools such as ADS, AWR, and optionally HFSS or CST for circuit and electromagnetic analysis.


Perform load-pull measurements, S-parameter analysis, and linearity testing.


Validate designs in the lab using VNAs, spectrum analyzers, signal generators, and power meters.


3.

Collaborate Across Teams
Work closely with PCB layout engineers to ensure best practices in high-frequency design.


Coordinate with system architects and digital/RF engineers to meet product specifications.


Support product engineering with documentation, design reviews, and lessons learned.


4.

Deliver Key Milestones
First 30 Days:
Familiarize with existing PA architectures, tools, and lab setup.

Begin schematic-level design of new PA circuit.


First 60 Days:
Complete first-pass design, initiate simulations, and guide initial PCB layout.


First 90 Days:
Validate the prototype in lab conditions; perform debugging, tuning, and generate a detailed test and evaluation report.


Who You Are
PA Design Expert:
Hands-on experience with RF power amplifier development, including load-pull, impedance matching, and performance tuning.


Tool Savvy:
Proficient in RF simulation tools (ADS, AWR) and experienced with EM solvers (HFSS or CST a plus).


Lab-Ready Engineer:
Skilled in testing with lab instruments such as VNAs, spectrum analyzers, and RF signal generators.


Cross-Functional Collaborator:
Proven ability to work with layout, digital, and product engineering teams.


Detail-Oriented Designer:
Committed to robust documentation and iterative improvement.


Why Join Us?
High-Impact Role:
Help define the next generation of high-performance wireless systems.


Innovation Environment:
Solve advanced RF engineering challenges in a collaborative setting.


Career Growth:
Work at the intersection of RF design, systems engineering, and product development.


Mission-Critical Tech:
Build solutions that matter for defense, robotics, and industrial autonomy.


Required Qualifications
Education:
Degree in Electrical Engineering, RF Engineering, or a related field.


Experience:
5+ years in RF PA circuit design and validation.


Are you ready to amplify your impact?

Join Doodle Labs and shape the performance of tomorrow’s wireless communication systems.


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