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Job Description

Application Engineer - C, C++

Who we are

Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly, simply, and securely. We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business, we are committed to helping our people accelerate their careers. Together, we shape the evolution.

The opportunity

As a Software Engineer - C, C++, Linux & Database, you will be instrumental in developing high-performance applications and data processing systems that power our payment infrastructure. You will work on mission-critical systems that handle millions of transactions, designing robust C, C++ applications on Linux platforms while managing and analyzing large-scale data sets to ensure optimal performance and reliability.

Day-to-day responsibilities

- Develop and maintain high-performance C, C++ applications for payment processing and transaction systems.
- Design and implement asynchronous network applications using Boost.Asio for real-time communication
- Build low-latency systems with focus on microsecond-level performance optimization




- Implement secure coding practices including input validation, encryption, authentication, and authorization mechanisms
- Conduct security-focused code reviews to identify and remediate vulnerabilities (buffer overflows, SQL injection, memory leaks.

Who are we looking for

- 1-4 years of professional experience in software development with C, C++, Linux & Database
- Strong proficiency in C, modern C++ (C++11/14/17) with solid understanding of OOPS principles
- Experience with Boost libraries, particularly Boost.Asio for asynchronous I/O operations
- Hands-on experience with low-latency application development and performance optimization.
- Proficiency in Linux operating systems and debugging commands.
- Understanding of network programming and socket programming concepts.

Perks & Benefits

Shape the evolution

We are on an exciting journey towards the next frontiers of payments technology, and we look for big thinkers, people with passion, can-do attitude and a hunger to learn and grow. Here you'll work with ambitious colleagues from around the world, take on unique challenges as a team, and make a real impact on the society. With an empowering culture, strong technology and extensive training opportunities, we help you accelerate your career - wherever you decide to go. Join our global team of 18,000 innovators and shape a tomorrow that is yours to own.

Learn more about life at Worldline at jobs.worldline.com

We are proud to be an Equal Prospect employer. We do not discriminate based upon race, religion, color, national origin, sex,



sexual orientation, gender identity, gender expression, age, status as an individual with a disability, or any applicable legally protected characteristics.

Information at a Glance

Request ID: 304984

Posting Start Date: 8/7/26

Job Area: Technology

Work Site: On-site

Contract Type: Permanent

Brand: Worldline

Job Location: India - Chennai

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📌 Application Engineer - C, C++ (Chennai)
🏢 Worldline
📍 Chennai