Role Overview We are looking for an experienced Senior Software Engineer with 7+ years of software development experience , robust expertise in POS and payment systems , and hands-on experience developing secure, reliable, and scalable payment applications.

The ideal candidate will have a strong combination of C/C++ payment/POS development and Java/Kotlin-based Android application development , with a solid understanding of ISO 8583, Terminal Management Systems (TMS), payment transaction processing, the Android SDK, and modern Android architecture .

The candidate will be responsible for designing, developing, integrating, debugging, and maintaining POS/payment solutions while collaborating closely with product, QA, hardware, and backend teams.

What We Are Looking For We are looking for a hands-on Senior Software Engineer who can work across the complete POS software stack — from payment transaction processing and ISO 8583 messaging to Android applications, APIs, device integration, and debugging .

The successful candidate should be comfortable taking ownership of complex technical problems, driving solutions independently, and collaborating with cross-functional teams to deliver secure, reliable, and high-performance POS payment solutions .

Key Responsibilities

- Design, develop, and maintain POS and payment applications for Android-based payment terminals.
- Develop and maintain payment-related components using Android, C, and C++.
- Implement and integrate ISO 8583 message formats and transaction flows.
- Work with Terminal Management Systems (TMS) for terminal configuration, application deployment, updates, and management.
- Develop Android applications using Java and Kotlin.
- Design robust and maintainable Android applications using MVVM and Repository architecture.
- Implement asynchronous operations using Kotlin Coroutines and WorkManager.
- Develop local data persistence using SQLite.
- Integrate backend services using Retrofit, Volley, and JSON.
- Work with Android components including ViewModel, LiveData, Navigation Component, and Jetpack Compose.




- Integrate and maintain third-party libraries and SDKs such as Firebase, Glide, and Picasso.
- Develop responsive and user-friendly POS interfaces following Material Design and UI/UX best practices.
- Integrate payment SDKs, device SDKs, and hardware-related APIs as required.
- Analyse and resolve complex application, transaction, integration, and device-level issues.
- Perform debugging and root-cause analysis across application, middleware, and POS/device layers.
- Collaborate with backend teams on API design and payment transaction integration.
- Participate in code reviews and ensure adherence to coding standards and best practices.
- Write unit/integration tests and support QA teams in troubleshooting and defect resolution.
- Use Git for source-code management and version control.
- Use Postman for API testing, validation, and troubleshooting.
- Work with Android Studio and Visual Studio for development and debugging.
- Contribute to technical design, architecture decisions, documentation, and development estimates.
- Mentor junior and mid-level engineers and provide technical guidance to the development team.

Qualifications Required Technical Skills POS Payment Technologies

- Strong hands-on experience in POS / payment systems.
- Good understanding of payment transaction processing and POS transaction flows.
- Strong knowledge of ISO 8583 messaging and transaction processing.
- Experience with Terminal Management Systems (TMS).
- Experience working with payment terminals, POS devices, or similar embedded/payment environments.
- Experience with C and C++ development.

Android Development

- Strong experience with Java and Kotlin.
- Hands-on experience with the Android SDK and Android application development.




- Strong understanding of MVVM architecture.
- Experience with:
- Kotlin Coroutines
- SQLite
- Retrofit
- Volley
- JSON
- Firebase
- Glide
- Picasso
- ViewModel
- LiveData
- Jetpack Compose
- Navigation Component
- Repository Pattern
- WorkManager

API Integration

- Strong experience with REST API integration.
- Experience with JSON-based web services.
- Hands-on experience using Postman for API testing and debugging.
- Understanding of client-server communication and API error handling.

Development Tools Technologies

- Android Studio, Visual Studio
- Git, Postman
- XML, Material Design
- Jetpack / Android Architecture Components

Software Engineering Skills

- Strong problem-solving and analytical skills.
- Excellent debugging and troubleshooting capabilities.
- Ability to understand and work across application, payment, API, and device layers.
- Strong understanding of object-oriented programming and software design principles.
- Ability to write clean, maintainable, reusable, and production-quality code.
- Experience with the software development lifecycle, code reviews, testing, and release processes.
- Ability to work effectively in a fast-paced product development environment.

Preferred Qualifications

- Bachelor's or Master's degree in Computer Science, Software Engineering, Electronics, or a related field.
- 7+ years of professional software development experience.
- Previous experience in payment, banking, fintech, retail, POS, acquiring, or transaction-processing systems is highly desirable.
- Experience working with Android-based POS/payment terminals will be an advantage.
- Experience integrating payment, hardware, or device-specific SDKs is preferred.

Key Competencies POS Payments | ISO 8583 | TMS | C/C++ | Java | Kotlin | Android | Android SDK | MVVM | Coroutines | Room | SQLite | REST APIs | Retrofit | Volley | JSON | Firebase | Jetpack Compose | ViewModel | LiveData | Navigation Component | Repository Pattern | WorkManager | Git | Postman | Android Studio | Visual Studio | XML | Material Design | UI/UX | Debugging

📌 Senior Software Engineer (Chennai Metropolitan Area)
🏢 Valor PayTech
📍 Chennai Metropolitan Area