Evaluate Radio Frequency (RF) Engineer candidates across 4 weighted areas: technical depth, work that shipped, diagnosis under uncertainty, and working across the org. Technical depth leads at 35%, so probe depth in link budgets, impedance matching, LNA noise figure and IP3 trade-offs, plus hands-on use of vector network analysers, spectrum analysers. Use the rubric to compare role-specific evidence consistently.
For technical depth, look for evidence the candidate talks fluently about S-parameters, noise figure cascades and Smith chart matching, citing measured versus simulated results from their own boards. For work that shipped, look for evidence the candidate names specific products shipped, bands and standards (LTE, 5G NR, Wi-Fi 6E, radar), with certification test reports they personally supported.
Apply the written 1–5 anchors to every answer, record the evidence behind each rating, and use the factor weights to reach a consistent overall assessment.
Complete evaluation framework
What to assess and how to score it
Review the evidence signals before interviewing. Then use the anchored descriptions—not instinct alone—to choose the score that best matches each answer.
01
Evaluation factor
Technical depth
35% weight
Probe depth in link budgets, impedance matching, LNA noise figure and IP3 trade-offs, plus hands-on use of vector network analysers, spectrum analysers and tools like ADS, HFSS or CST.
Evidence to listen for
Explains the physics or mechanism behind their work, not just the tooling
Names the standards, tolerances, and constraints they designed against
Can defend a design decision under follow-up questions
Distinguishes what they personally engineered from what the team delivered
Five-point scoring guide
1
Poor
Cannot explain the fundamentals of their own stated specialism.
2
Needs Improvement
Knows the vocabulary but not the underlying mechanism; struggles under follow-ups.
3
Satisfactory
Solid working knowledge for the role; depth thins out on edge cases.
4
Very Good
Strong command of the domain; explains trade-offs and defends decisions well.
5
Excellent
Talks fluently about S-parameters, noise figure cascades and Smith chart matching, citing measured versus simulated results from their own boards.
02
Evaluation factor
Work that shipped
30% weight
Ask which radios, antennas, filters or front-end modules they took to production: frequency bands, output power, FCC or CE certification passes, and volumes shipped.
Evidence to listen for
Names specific programmes, parts, or systems that reached production or field use
States their own scope inside the project
Can give measured outcomes: yield, cycle time, cost, failure rate
Explains what went wrong and what they changed
Five-point scoring guide
1
Poor
No delivered work; experience is coursework, lab-only, or purely observational.
2
Needs Improvement
Contributed to projects but cannot say what shipped or what their part was.
3
Satisfactory
Has delivered real work; outcomes described without numbers.
4
Very Good
Names shipped work and their scope, with some measured results.
5
Excellent
Names specific products shipped, bands and standards (LTE, 5G NR, Wi-Fi 6E, radar), with certification test reports they personally supported.
03
Evaluation factor
Diagnosis under uncertainty
20% weight
Test how they chase intermittent desense, spurious emissions or failed EMC scans: near-field probing, shielding fixes, layout changes, and isolating self-interference from harmonics.
Evidence to listen for
Describes a real failure they chased to root cause
Shows a method: isolate variables, reproduce, measure, eliminate
Distinguishes correlation from cause
Says what they ruled out and why, not only what the answer turned out to be
Five-point scoring guide
1
Poor
No diagnostic method; guesses or escalates immediately.
2
Needs Improvement
Trial and error with no structure; cannot explain how they narrowed the cause.
3
Satisfactory
Reasonable method on familiar problems; less structured on novel ones.
4
Very Good
Clear systematic approach with a real root-cause story.
5
Excellent
Reconstructs a real desense or EMI investigation step by step, naming the measurement that finally identified the coupling path.
04
Evaluation factor
Working across the org
15% weight
Look for work with PCB layout, mechanical and firmware teams on antenna placement, ground plane constraints, and with test labs scheduling chamber time and pre-scan iterations.
Evidence to listen for
Explains technical constraints to non-technical stakeholders without condescension
Has negotiated scope, cost, or timeline with manufacturing, product, or suppliers
Documents decisions so others can act on them
Takes review feedback without defensiveness
Five-point scoring guide
1
Poor
Cannot communicate outside their specialism; dismissive of other functions.
2
Needs Improvement
Communication gaps cause rework; avoids stakeholder contact.
3
Satisfactory
Works adequately with other teams; documentation is thin.
4
Very Good
Communicates clearly across functions; reliable collaborator.
5
Excellent
Describes negotiating enclosure or stack-up changes early, giving mechanical designers clear keep-out zones instead of debugging after tooling.
Evidence-led prompts
Interview questions for a Radio Frequency (RF) Engineer
Use these prompts to surface evidence for the weighted factors above and compare candidates against the same role-specific criteria.
01
What is your experience working with RF components such as filters and antennas?
02
How well do you understand RF propagation and microwave theory?
03
Are you familiar with tools such as MATLAB, HFSS and ADS for design and simulation?
04
What experience do you have designing RF circuits for wireless communication?
05
Can you describe a time you had to adjust an RF design due to unforeseen issues?
