We are looking for a skilled Java Developer with hands-on experience in UPI to join our high-performing engineering team. You will work on mission-critical banking/payment applications that demand high availability, scalability, and security.

As a key contributor, you will help design and build robust backend systems aligned with our product strategy, ensuring seamless digital payment experiences across UPI and other payment rails.

Key Responsibilities :

- Design, develop, and maintain UPI-based payment solutions with high availability and performance

- Contribute across all phases of the Software Development Lifecycle (SDLC)

- Build scalable backend services using Java / Java EE technologies

- Develop APIs for UPI integrations (e.g., PSP, TPAP, bank integrations, NPCI switch connectivity)

- Write clean, efficient, and testable code following best practices

- Perform code reviews, debugging, and performance optimization

- Ensure applications comply with UPI/NPCI guidelines, security, and regulatory standards

- Work on real-time transaction processing systems with strong focus on reliability and latency

- Prepare and manage releases of software components

- Convert business requirements into technical solutions

- Support continuous improvement through research of new technologies and tools

- Participate in architecture discussions and design reviews

- Maintain test environments and implement unit/integration testing

- Identify system bottlenecks and optimize performance

- Create technical documentation, user guides, and training materials

Required Skills & Experience :

- Bachelor's degree in computer science / IT / Electronics or equivalent

- 4+ years of experience in Java backend development

- Strong expertise in :

i. Core Java, Collections Framework

ii. OOPS concepts and design patterns

iii. Java EE (JSP, Servlets)

- Experience with frameworks like :

i. Spring / Spring Boot (preferred) or Struts

- Hands-on experience in :

i. RESTful APIs / Web Services (SOAP & REST)

ii. XML and JSON processing

- Database knowledge :

i. MySQL / PostgreSQL

ii. ORM frameworks like Hibernate / JPA

- Experience with application servers like Apache Tomcat

- Strong understanding of multithreading and concurrency (important for UPI systems)

- Experience with unit testing frameworks like JUnit

UPI / Payments Domain Expertise (Mandatory or Strongly Preferred) :

- Hands-on experience with UPI integrations (PSP/TPAP/Banks)

- Understanding of NPCI specifications and UPI architecture

- Knowledge of :

i. UPI flows (Collect, Pay, Intent, QR)

ii. Transaction lifecycle and reconciliation

About Us :

At 86400 (An initiative by Mobileware Technologies), we specialize in delivering advanced digital payment solutions for the BFSI sector. Our product suite includes NPCI switches like UPI, IMPS, BBPS, AePS, and our flagship API Banking Platform, TransXT. With 15 years of experience, we are ISO 27001 certified, PCI DSS compliant, and a preferred NPCI partner.

We empower Financial Institutions with innovative, secure, and compliant payment processing systems. Our clients-banks, NBFCs, fintechs, and more-rely on us for seamless API integration and customized financial solutions to meet their evolving needs. Join us in shaping the future of digital payments! To know more about us, you can view our website at https://86400.in/