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.

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

📌 Software Engineer (Chennai)
🏢 Valor PayTech
📍 Chennai