Lead Java Fullstack Application Engineer

TymblHub; Hinoba-an; On-site; PHP 1,990,000 - 3,979,000; Full time

Job summary

National Payment Corporation of India (NPCI) seeks a Lead Fullstack Application Engineer to drive end-to-end delivery of UPI API applications from design to production. You will push continuous improvements in security, performance, and scalability within a high-availability microservices ecosystem.

The role requires 9–14 years’ experience and a strong background in Java Spring Boot, REST APIs, and cloud-native architectures.

Qualifications

• 9+ to 14 years of experience in design, development and delivery of API platforms.
• Bachelor's/Master's in Computer Science, Electronics/Electrical Engineering, Data Science, or related field.

Responsibilities

• Lead end-to-end delivery of UPI API applications from system design to production deployment.
• Drive continuous enhancements in performance, security, scalability, and regulatory compliance.
• Design, build, and maintain high-availability microservices-based API platforms.
• Collaborate with cross-functional teams to enable seamless integration and scalable solutions.
• Implement and enforce best practices for API lifecycle management, including versioning and backward compatibility.
• Establish strong observability with logging, metrics, and tracing for production systems.
• Optimize system architecture to support high transaction throughput and low latency.
• Ensure reliability and operational stability of APIs powering large-scale UPI transactions.

Skills

Java Spring Boot

High availability

Microservices

REST APIs

Education

Bachelors/Masters in CS or related field

Tools

Oracle

Cassandra

KDB+

YugabyteDB

ClickHouse

Redis

Apache Ignite

React

TypeScript

Docker

Kubernetes

Jenkins

GitLab

Kong

NGINX

Job description

National Payment Corporation of India (NPCI) is Hiring! The opportunity This role offers the opportunity to design, Development delivery and continuous enhancement of IMPS, AePS & NETC applications at NPCI, supporting Indias rapidly growing digital payments ecosystem. The position focuses on managing missioncritical payment APIs, ensuring scalability, security, high availability, and lowlatency performance. You will work on highscale systems handling billions of transactions, introduce innovative enhancements, and help maintain NPCIs Leadership in digital payments through robust, reliable API platforms.

Job details

Job Title: Lead Fullstack Application Engineer

Division: Application Design & Development

Years of Experience: 9+ to 14 Years

Education: Bachelors/Masters in Computer Science, Electronics/Electrical Engineering, Data Science, or related technical field

Employment Type: Full-time

Location: Mumbai, Hyderabad (HQ, Development Center)

Role Type: Permanent

Key responsibilities

• Lead endtoend delivery of UPI API applications, from system design to production deployment.
• Drive continuous enhancements in performance, security, scalability, and regulatory compliance.
• Design, build, and maintain highavailability microservicesbased API Platforms.
• Collaborate with crossfunctional teams to enable seamless integration and scalable solutions.
• Implement and enforce best practices for API lifecycle management, including versioning and backward compatibility.
• Establish strong observability practices using logging, metrics, and tracing for production systems.
• Optimize system architecture to support high transaction throughput and low latency.
• Ensure reliability and operational stability of APIs powering largescale UPI transactions.

Required Technical Skills

Backend & Middleware

• Java (Spring Boot) for microservices and REST API development

Databases & Storage

• Relational Databases: Oracle
• NoSQL Databases: Cassandra, KDB+, YugabyteDB
• Analytical Databases: ClickHouse

Caching & In-Memory Stores

• Redis, Apache Ignite

Frontend (Operational Tools)

• React and TypeScript for dashboards and administrative interfaces

DevOps & Infrastructure

• Docker for containerization
• Kubernetes for orchestration of microservices and APIs
• CI/CD Pipelines: Jenkins, GitLab
• API Gateway: Kong / NGINX

Key skills and experience required

• Strong experience in scalable application development for hightraffic systems.
• Deep understanding of API design principles, RESTful services, and microservices architecture.
• Experience building and operating highavailability, lowlatency distributed systems.
• Knowledge of CI/CD pipelines, automated deployment strategies, and production readiness.
• Strong understanding of observability, including logging, monitoring, and distributed tracing.
• Ability to collaborate effectively with crossfunctional engineering, platform, and architecture teams.
• Experience optimizing system performance, throughput, and reliability in production environments.

Good to have skills and experience required

• Experience working with largescale payment or fintech platforms.
• Exposure to realtime observability and monitoring tools such as Prometheus, Grafana, and ELK Stack.
• Strong understanding of security mechanisms including OAuth2, JWT, and API rate limiting.
• Performance optimization experience using asynchronous processing and thread management.
• Background in maintaining and evolving nationscale digital infrastructure supporting realtime transactions.