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.

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