RF Calibration Engineer

We are seeking a skilled and experienced RF Calibration Engineer with hands-on expertise in Qualcomm cellular platform to lead and execute RF calibration activities including RFC card generation, QCN / XQCN handling, and RF tuning. The candidate will play a critical role in ensuring optimal RF performance across LTE, GPS, Wi-Fi, and Bluetooth subsystems.

Areas Of Responsibility

Perform RF calibration for cellular platforms based on Qualcomm SoCs (e.g., QCM, QCS, SA2150, SA415M, SDX series, QCX series)

Generate and update RFC (Radio Frequency Configuration) cards for factory and production use

Handle QCN / XQCN backup, editing, and restoration for RF parameter tuning

Conduct calibration procedures using Qualcomm toolchain : QPST, QXDM, QDART, QCAT, and QMSL

Analyze and debug RF logs, NV configurations, and RF signal performance

Coordinate with hardware and modem teams to optimize antenna and RF path

Support EFS / NV management , RF provisioning, and board-level bring-up

Automate repetitive tasks using Python / Perl scripts for efficiency in calibration and flashing

Maintain documentation and traceability for RF performance and test results

Experience and Qualification

Experience : 5 to 10 yrs

Solid hands-on experience with Qualcomm RF calibration tools and procedures

Experience with multiple Qualcomm chipsets (e.g., QCM2290, QCS2290, QCX216, SA415M, SDX55, etc.)

Deep understanding of LTE / 4G / 5G, GNSS, Bluetooth, and Wi-Fi RF subsystems

Familiarity with NV item editing, eFuse programming, and RF tuning principles

Strong background in wireless testing, calibration lab tools, and scripting automation

Bachelor's or Master's degree in Electronics, Telecommunications, or relevant discipline

Qualifications :

Prior experience with mass production RF calibration and automation

Exposure to carrier certification (PTCRB, GCF, operator-specific requirements)

Familiarity with SAR / TRP / TIS testing , antenna design, and tuning practices

Knowledge of eSIM / eUICC , security provisioning, and factory test flows

Experience with Qualcomm’s Diag protocol , QCN tools , and RF trace analysis

Technical And Behavioural Skills

Technical Skills :

Qualcomm Tools & Platforms :

QXDM – Log capture, RF trace analysis, event monitoring

QPST / QFIL – EFS access, QCN flashing, QPST server tools

QCAT – Log post-processing and NV item analysis

QDART – RF calibration and automation interface

QMSL (Qualcomm Modem Software Library) – Used for scripting RF calibration routines

RFNV Tool / QCN Manager / NV Manager – NV editing and configuration

RF Card Tool / RFC Generator – RFC card creation, editing, and validation

eFUSE Tools – eFUSE blowing for platform security and production configuration

Calibration & Testing :

RF Calibration – LTE / 4G / 5G, GNSS (GPS / GLONASS), Bluetooth, Wi-Fi

QCN / XQCN Handling – Backup, edit, restore NV configurations

EFS Management – File system access for provisioning and NV injection

RF Tuning & Optimization – Gain table tuning, PA bias, switch path config

Production Calibration Flow – Factory-line calibration using automation scripts

Carrier Certification Support – TRP / TIS / SAR data generation, PTCRB, GCF

Modem & Protocol Stack Knowledge :

LTE Bands, Band combinations, Carrier Aggregation

Diag protocol & diagnostic message decoding

Call flow understanding : Attach, RRC, PDP contexts

NV item structure and interdependencies

Behavioural Skills :

Strong communication and teamwork skills.

Ability to adapt to a fast-paced and dynamic business environment.

Detail-oriented with a focus on quality and accuracy.

Proactive and self-motivated with a results-oriented mindset.