Senior Developer - Telecom Mobile Test Probes

CSG; India; On-site; INR 1,800,000 - 2,400,000; Full time

Job summary

CSG Assure is seeking a Senior Developer to join our agile telecom testing team and help advance our 4G/5G and IoT verification platform. You will contribute to a Linux-based C/C++ codebase and work with our global operator customers to validate mobile service performance.

The role offers hands-on development on next‑generation mobile test probes, collaboration with cross-functional teams, and ownership from design to delivery in a fast-paced environment, with opportunities to grow technically

Qualifications

• Completed Degree in Computer Science or related field.
• 5+ years of professional experience in software development, preferably in telecom.
• Strong proficiency in C++, data structures and multi-threading programming.
• Linux system knowledge.
• Solid understanding of the Radio Access Network (RAN) layer of mobile networks; signaling and data exchange between devices and the network.
• Good knowledge of mobile network technologies (3G, 4G, IMS/VoLTE, 5G, IoT) and network signaling (SIP, RRC, NAS) as defined in 3GPP.
• Talent for AI driven development.
• Excellent communication, problem-solving skills and ability to work independently in a fast-paced environment.

Skills

C++

Linux

Data structures

Multithreading

RAN knowledge

3G/4G/5G

SIP signaling

AI driven development

Communication skills

Education

Degree in Computer Science

Tools

Wireshark

Job description

Are you passionate about software development for mobile network integration? Join our team to help take our telecom testing technology to new heights.

The CSG Assure team is developing an advanced telecom testing software solution used by mobile operators across the globe, including leading operators like AT&T, Tata, Orange.

CSG Assure is an artificial test traffic generation platform consisting of a cloud-based application, controllers and test probes located in around 200 countries globally.

We are looking for a skilled developer to be part of our small, agile team to build applications that help our mobile operator customers validate and optimize mobile service performance for their roamers and local subscribers.

You will develop our next-generation mobile test probe for 4G, 5G and IoT to simulate mobile users using voice, SMS and data services. Main development is done in C & C++ on Linux platform.

We think that you are a highly skilled, analytical, customer-focused person with a strong developer profile that enjoys taking responsibility, making sure our customers get full value of our high-tech solutions.

Required Skills

• Completed Degree in Computer Science or related field
• 5+ years of professional experience in software development, preferably in telecom
• Strong proficiency in C++, data structures and multi-threading programming
• Linux system knowledge
• Solid understanding of the Radio Access Network (RAN) layer of mobile networks; the signaling and data exchange between devices and the network.
• Good knowledge of mobile network technologies (3G, 4G, IMS/VoLTE, 5G, IoT) and network signaling (e.g. SIP, RRC, NAS) as defined in 3GPP
• Talent for AI driven development
• Excellent Communication, problem-solving skills and ability to work independently in a fast-paced environment.

Bonus Skills

• Experience in development against cellular modems; experience with either AT commands, QMI, or modem vendor SDK
• Experience with network monitoring tools and protocol analyzers like Wireshark, QCAT
• Familiarity with scripting languages, e.g. LUA, Shell, Perl
• Understanding of eUICC/eSIM, GSMA standards
• Android development experience

Why should you apply?

• Opportunity to work and grow your skillset in cutting-edge technologies

Key Words: Senior Developer, Software Engineer, Mobile Networks, C++, Linux, Modem Communication, Telecom Software

Location(s):

India Remote

Accommodation:

If you would like to be considered for employment opportunities with CSG and need special assistance due to a disability or accommodation for a disability throughout any aspect of the application process, please call us at [phone] or email us at [e-mail]. CSG provides accommodations for persons with disabilities in employment, including during the hiring process and any interview and/or testing processes.

Our Guiding Principles:

Impact: Always help and empower others, whether they’re colleagues or customers. When our employees set their minds to something, great things happen.

Integrity: Do what’s right for our customers and our people while being authentic. We treat everyone with trust and respect—that’s just who we are.

Inspiration: Be bold in the way you think and passionate about the work you do. Test out innovative ideas without the fear of failure.

Our Story:

CSG empowers companies to build unforgettable experiences, making it easier for people and businesses to connect with, use and pay for the services they value most. For over 40 years, CSG's technologies and people have helped some of the world's most recognizable brands solve their toughest business challenges and evolve to meet the demands of today's digital economy.

By channeling the power of all, we make ordinary customer and employee experiences extraordinary. Our people [CSGers] are fearlessly committed and connected, high on integrity and low on ego, making us the easiest company to do business with and the best place to work. We power a culture of integrity, innovation, and impact across our locations, representing the most authentic version of ourselves to build a better future together. That's just who we are.

Learn more about CSG Inclusion & Impact here.