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.