Protocol Stack Developer - NAS Developer

Your Role

As a Protocol Stack NAS Developer at Capgemini, you will be responsible for designing, developing, and enhancing LTE NAS layer functionalities across embedded systems. You will work extensively on EMM, ESM, and SMS procedures, ensuring seamless integration and performance within LTE protocol stack components. Your role involves deep engagement with 3GPP specifications, debugging complex protocol issues, and collaborating with cross‑functional teams for feature implementation and validation.

In this role, you will:
· Design, implement, and optimize LTE NAS (EMM/ESM/SMS) features.
· Develop and troubleshoot key EMM procedures such as authentication, GUTI reallocation, TAU, SMC, and identification.
· Work with essential 3GPP specifications, including TS 23.401, TS 24.301, TS 24.008, TS 24.303, TS 23.122, and TS 23.272.
· Debug and analyze protocol behaviors using GDB or similar tools on Linux environments.
· Validate features using network simulators and host test setups.
· Collaborate with integration and verification teams to resolve protocol‑level issues.
· Maintain code quality and workflow efficiency using GIT for version control.

Your Profile

· Strong development experience in LTE NAS (EMM/ESM/SMS) procedures.
· Solid understanding of LTE/4G system architecture and protocol layers.
· Excellent C programming skills with experience on Linux and familiarity with RTOS concepts.
· Hands‑on experience with network simulators, log analysis, and debugging tools such as GDB.
· Proficiency in GIT and Linux‑based development workflows.
· Strong problem‑solving, analytical, and debugging skills.
· Bachelor’s or Master’s degree (B.E/B.Tech/M.E/M.Tech) in Electronics, Communication, Telecommunications, Computer Science, or related fields.

What You’ll Love About Working Here

We value flexibility and support our employees with remote work options and adaptable schedules to maintain a healthy work-life balance. Our inclusive culture brings together diverse professionals committed to growth, innovation, and excellence. You’ll have access to continuous learning opportunities and certifications in emerging technologies like cloud and AI.

About Us

At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s most innovative companies unleash their potential. From autonomous cars to life-saving robots, our digital and software technology experts think outside the box as they provide unique R&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same.