5G/4G Layer-1 Protocol Stack Developer (DSP) | Gurugram, Haryana / Bengaluru, Karnataka

HSC; Gurugram District, Bengaluru; On-site; INR 1,500,000 - 2,800,000; Full time

Job summary

HSC is seeking an experienced 5G/4G Layer-1 DSP developer for on-site roles in Gurugram or Bengaluru. You will design, implement, and optimize L1 software and UE stack components for LTE/NR, with emphasis on DSP, OFDM, and MIMO performance.

You will collaborate across embedded, RF, and hardware teams, use QXDM/QCAT/Wireshark for debugging, and follow 3GPP specifications to ensure robust signal processing and low latency in live networks.

Qualifications

• Bachelor’s degree in Electronics and Communication Engineering, Computer Science, Telecommunications, or a related technical discipline.
• Minimum 3+ years of experience in wireless communications, embedded systems, or L1 protocol stack development.
• Strong hands-on C and C++ experience for real-time embedded and DSP environments.
• Deep knowledge of 3GPP LTE/NR physical layer protocols and air interface mechanics.
• DSP concepts, OFDM and MIMO techniques, and debugging tools like QXDM, QCAT, Wireshark.
• Git version control and JIRA for agile project management.
• Excellent English communication and teamwork skills.
• Willingness to work on-site in Gurugram, Haryana or Bengaluru, Karnataka.

Responsibilities

• Design, develop, test, and debug L1 protocol software and DSP algorithms for 4G LTE and 5G NR.
• Implement 5G UE protocol stack features and physical channel processing per 3GPP specs.
• Optimize DSP code for OFDM and MIMO architectures.
• Capture, analyze, and diagnose OTA logs and RF performance data using QXDM and Wireshark.
• Collaborate with embedded, RF, and hardware teams; manage code with Git/JIRA.
• Troubleshoot real-time firmware crashes, memory leaks, and timing issues.
• Maintain technical documentation for protocol stack designs, APIs, and tests.

Skills

C/C++

Embedded systems

3GPP LTE/NR

DSP concepts

OFDM

MIMO

QXDM

QCAT

Wireshark

Git

JIRA

English communication

On-site readiness

Education

Bachelors in ECE/CS/Telecom

Tools

MATLAB/Simulink

Job description

Position Summary

We are actively seeking an experienced, high-caliber, and technical 5G/4G Layer-1 Protocol Stack Developer (DSP) with a strong professional background in UE stack development, LTE/NR physical layer algorithms, and digital signal processing optimization to join our engineering team on a full-time permanent on-site basis in Gurugram, Haryana or Bengaluru, Karnataka. In this critical wireless communications engineering role, you will be responsible for designing, developing, testing, and debugging advanced physical layer (L1) protocol software for 5G New Radio and 4G LTE cellular systems. You will leverage your deep specialist expertise in C, C++, DSP architectures, OFDM, MIMO, and wireless debugging tools to deliver uncompromised signal processing performance, low latency, and operational excellence. This opportunity offers competitive compensation, executive technical visibility, and exceptional career growth prospects within a premier global telecommunications and embedded systems technology enterprise.

Detailed Job Description

As a 5G/4G Layer-1 Protocol Stack Developer (DSP) supporting our wireless engineering operations in Gurugram and Bengaluru, you will take full operational, tactical, and technical ownership of Physical Layer (L1) software development, UE protocol stack integration, and DSP optimization. Your day-to-day responsibilities include designing, developing, and debugging LTE/NR Physical Layer algorithms and DSP routines for mobile communication chipsets, implementing 5G UE stack features adhering strictly to 3GPP technical specifications, optimizing signal processing pipelines for OFDM and MIMO transmission schemes, conducting rigorous hardware/software integration, diagnostic log analysis, and system debugging using QXDM and Wireshark, managing code repositories, version control, and branch workflows via Git and tracking engineering tasks through JIRA, collaborating closely with cross-functional systems engineering, hardware, and RF teams, conducting root-cause analysis for complex over-the-air communication anomalies, and ensuring strict compliance with wireless industry standards and performance benchmarks. You will utilize your proactive troubleshooting and analytical problem-solving skills to resolve complex L1 protocol anomalies under strict project delivery timelines.

Key Responsibilities

• Design, develop, test, and debug advanced Physical Layer (L1) protocol software and DSP algorithms for 4G LTE and 5G NR systems.
• Implement 5G UE protocol stack features and physical channel processing in strict accordance with 3GPP specifications.
• Optimize digital signal processing (DSP) code for Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO) architectures.
• Capture, analyze, and diagnose over-the-air diagnostic logs and RF performance data using QXDM and Wireshark.
• Collaborate seamlessly with cross-functional embedded systems, RF design, and hardware verification squads.
• Execute rigorous code versioning, pull requests, and collaborative development workflows utilizing Git and JIRA.
• Troubleshoot and resolve complex real-time firmware crashes, memory leaks, and timing synchronization bottlenecks.
• Maintain comprehensive technical documentation of protocol stack designs, API interfaces, and test verification reports.

Required Qualifications & Skills

• Bachelor's degree in Electronics and Communication Engineering, Computer Science, Telecommunications, or a related technical discipline.
• Minimum of 3+ years of progressive professional experience in wireless communications, embedded systems, or L1 protocol stack development.
• Strong, demonstrable hands-on professional expertise in C and C++ programming for real-time embedded and DSP environments.
• Deep practical proficiency in 3GPP standards covering 4G LTE and 5G NR physical layer protocols and air interface mechanics.
• Comprehensive working knowledge of digital signal processing (DSP) concepts, OFDM, and MIMO antenna techniques.
• Solid practical experience with telecom diagnostic tools including QXDM, QCAT, and Wireshark protocol analyzers.
• Working knowledge of Git version control systems and JIRA issue tracking and agile project management tools.
• Exceptional analytical, troubleshooting, debugging, and problem-solving capabilities under high-pressure wireless conditions.
• Excellent written and verbal English communication skills with strong teamwork and technical coordination abilities.
• Mandatory legal work eligibility and physical availability for full-time on-site operations in Gurugram, Haryana or Bengaluru, Karnataka.

Nice-to-Have Skills

• Specialized development experience with Qualcomm Hexagon DSP architecture and ARM NEON SIMD optimization.
• Hands-on familiarity with MATLAB/Simulink modeling, algorithm prototyping, and fixed-point conversion.
• Practical exposure to Python scripting for test automation, log parsing, and data visualization.
• Prior professional working experience with modem chipset manufacturers, tier-1 mobile OEMs, or wireless R&D centers.

Application Information

• Salary/Rate: Market Competitive / Enterprise Telecommunications Package
• Deadline: Open until filled (Urgent Gurugram & Bengaluru On-Site Opening)
• Notice Period: Immediate to 30 Days Preferred
• Contract Duration: Permanent / Full-Time On-Site Engagement (Gurugram / Bengaluru, India)
• Company Website: https://www.hsc.com

Recruitment Pro Tip

When applying for this 5G/4G Layer-1 Protocol Stack Developer position, ensure your resume explicitly highlights your C/C++ embedded programming portfolio, details your 3GPP LTE/NR physical layer and QXDM debugging experience, and confirms your location preference.