Lead Software Engineer - C/C++, Unix/Linux, ARQC, ARPC, HSM

Role Overview:

We are seeking a Lead Software Engineer with strong expertise in C/C++ and Unix/Linux systems to design, develop, and lead high-performance, scalable, and secure enterprise applications. The role requires hands-on technical leadership, architecture ownership, and cross-team collaboration to deliver mission-critical systems.

Lead engineers are expected to own complex problems, drive architectural decisions, and mentor engineering teams, while ensuring high-quality software delivery.

Key Responsibilities:

Technical Leadership & Architecture

· Design and develop high-performance, low-latency systems using C/C++ on Unix/Linux platforms

· Own end-to-end architecture for components and services, ensuring scalability and resiliency

· Introduce and adopt modern design patterns, frameworks, and best practices

· Provide technical direction and guidance to engineering teams.

Development & Delivery

· Lead design, development, testing, and deployment activities

· Write efficient, maintainable, and secure C/C++ code adhering to coding standards.

· Drive automation of builds, testing, and deployment pipelines

· Troubleshoot complex production issues and ensure system stability

System Design & Performance

· Architect systems for high throughput, fault tolerance, and performance optimization

· Perform performance tuning, memory optimization, and multithreading enhancements

· Ensure system reliability and availability (high uptime expectations)

Collaboration & Stakeholder Management

· Work closely with product, QA, and operations teams to prioritize and deliver solutions

· Drive design discussions, trade-offs, and cross-functional decisions

· Coordinate across geographically distributed teams

Mentorship & Engineering Excellence

· Mentor developers and promote best practices (code reviews, TDD, secure coding).

· Conduct technical interviews and help build high-performing teams

· Lead post-incident reviews and drive continuous improvement initiatives

Required Technical Skills:

· Strong experience of Cryptography in Payment cycle.

· Strong experience of Session Key Derivation and validation.

· Strong experience of Triple DES and Advanced Encryption Standard techniques.

· Strong understanding of Thales or equivalent Payment Validation HSM modules and its commands.

· Strong programming expertise in C and C++.

· Deep understanding of Unix/Linux systems, shell scripting, and system internals

· Strong understanding multi threading in C and Linux

· Experience with Multithreading and concurrency, Memory management and performance tuning, Socket programming / IPC mechanisms

· Knowledge of data structures, algorithms, and design patterns

· Familiarity with build tools (Make/CMake), debugging tools (gdb), gtest, and profiling tools.

· Strong experience of Github and Github Copilot.

· Strong experience of using Copilot with MCP servers.

All About you:

· Bachelor's or Master's degree in Computer Science, Engineering, or related field (or equivalent experience)

· Experience with Agile methodologies, strong understanding of DevOps practices and CI/CD pipelines

· Experience writing unit, integration, and system tests

· Experience designing distributed systems or high-scale enterprise applications

· Exposure to security standards (OWASP, secure coding practices).

· Experience in payment systems / transaction processing / financial domain

· Exposure to cloud-native or hybrid systems

· Knowledge of additional languages (Java/Python) is a plus

· Strong problem-solving and analytical skills

· Ability to drive decisions and manage technical trade-offs

· Excellent communication and stakeholder management