Full Stack Java Developer

we are looking for a highly skilled Full Stack Java Developer to join our technology team at SP TRANSACTION HUB TECHNOLOGY PRIVATE LIMITED. The candidate will be responsible for the **end-to-end development and integration of payment gateway systems. This is a core technical role with a high impact on our fintech infrastructure.

Key Roles and Responsibilities:

* Design, develop, and maintain robust, scalable backend services and APIs using Java (Spring Boot).

* Develop responsive and dynamic user interfaces using React.js / Angular / HTML5 / CSS3 / JavaScript.

* Integrate third-party banking APIs, UPI, payment gateways (Razorpay, Cashfree, PayU, etc.), and internal financial systems.

* Implement secure payment flows, tokenization, encryption, and fraud prevention mechanisms.

* Manage full project lifecycle from design to deployment, including unit testing and performance tuning.

* Collaborate with product managers, designers, and QA teams to ensure smooth execution of features.

* Write clean, well-documented, and reusable code with proper version control (Git).

* Optimize applications for maximum speed, scalability, and reliability.

* Handle database design and development with MySQL / PostgreSQL / MongoDB.

* Troubleshoot and resolve bugs, production issues, and bottlenecks in real-time systems.

* Stay updated on new technologies, trends, and compliance standards in the fintech/payment industry.

Required Technical Skills:

* Languages & Frameworks:

* Core Java, Spring Boot, Hibernate

* HTML5, CSS3, JavaScript, TypeScript

* React.js or Angular (preferred)

* Databases:

* MySQL, PostgreSQL, or MongoDB

* Tools & Technologies:

* Git, Maven, Jenkins, REST APIs, Swagger

* Postman, Docker (optional)

* Knowledge of:

* Payment gateway protocols: UPI, IMPS, NEFT, RTGS, QR

* Authentication and Security: JWT, OAuth2, SSL

* PCI DSS compliance and encryption methods

Job Types: Full-time, Permanent

Pay: ₹30,000.00 - ₹45,000.00 per month

Benefits:

• Cell phone reimbursement
• Paid sick time
• Provident Fund

Work Location: In person