Assistant Manager - Java Full Stack Developer (React JS)

Job Title

Java Full Stack Developer(React JS) - IT Payment Services (ITG)

Department

IT & Payments - ITG (IT Payment Services)

Business line / Function description

The IT Payment Services line is the global hub for payments and cash-management solutions across the BNP Paribas Group. It delivers high-throughput, highly secure applications that process billions of transactions each year. The team works in an Agile, DevOps-centric environment and collaborates closely with product owners, compliance, and operations to keep the platform reliable, compliant, and innovative.

Position purpose

The Senior Java Full Stack Developer will join a cross-functional delivery team to design, develop, and maintain Java and React application services for payment-related applications. The role focuses on delivering clean, test-driven code, supporting automated CI/CD pipelines and data-integrity throughout the product lifecycle.

Core responsibilities

• Analyse functional specifications and create detailed technical designs that cover both Java back‐end services and React front‐end components.
• Develop and maintain RESTful APIs using Java 21 and Spring Boot 4, including data access with PostgreSQL (schema design, migrations, JPA/Hibernate).
• Build batch processes for CSV ingestion and data synchronization, exposing results through the same APIs.
• Implement responsive user interfaces with React 18+, using functional components, hooks, and a state‐management solution (e.g., Redux or Context API).
• Consume Open API/Swagger contracts generated from Spring services to keep front‐end calls type‐safe (generate TypeScript clients if needed).
• Write comprehensive tests:
  • Backend: JUnit 5, Test containers, Spring Cloud Contract for contract testing.
  • Front‐end: React Testing Library, Playwright for end‐to‐end scenarios.
  • Apply BDD/TDD practices across the stack.
• Participate actively in agile ceremonies (sprint planning, daily stand‐ups, backlog grooming, retrospectives) and collaborate closely with Product Owners, QA, and other development teams.
• Conduct code reviews for both Java and React code, enforce coding standards (e.g., Checkstyle for Java, ESLint/Prettier for JavaScript/TypeScript), and mentor teammates on best practices.
• Diagnose and resolve production incidents, ensuring security compliance (OWASP guidelines) and minimizing downtime for both API services and UI layers.
• Document technical decisions, API specifications (OpenAPI/Swagger), component libraries, and configuration details in Confluence and JIRA.
• Set up and maintain CI/CD pipelines that build Java artifacts, run all test suites, bundle React assets, and deploy to container‐orchestrated environments (Docker/Kubernetes).
• Stay current with modern tooling: Maven, Node 20+, NPM workspaces, Storybook for UI component documentation, and monitoring/tracing solutions.

Contributing responsibilities

Act as a proactive team player - share knowledge, raise blockers early, and help meet delivery

timelines.

Provide clear status updates in sprint ceremonies and on the team Kanban board.

Embrace continuous learning - explore new frameworks and adopt best

practices in event-driven architecture and data processing.

Support the creation and maintenance of CI pipelines (GitLab-CI) and deployment automation (ArgoCD, Docker).

Technical competencies

Required

Java 21

React JS

Spring Boot (4x)

Spring Batch

Postgres SQL

JUnit 5, Test containers

JIRA, Confluence

Agile (Scrum/Kanban)

Nice-to-have

GitLab-CI, Docker

ArgoCD

Kibana

Behavioural competencies

Communication - articulate technical concepts to both IT and business audiences; produce clear documentation.

Analytical ability - break down complex requirements, identify edge cases, and propose robust solutions.

Flexibility & independence - adapt quickly to changing priorities while taking ownership of deliverables.

Customer orientation - understand end-user impact and strive for high-quality, secure products.

Specific qualifications

Minimum 5-9 years of professional software development experience with Java-React JS in an Agile environment.

Bachelor's degree in computer science, Engineering, or a related discipline (or equivalent practical experience).

Familiarity with payments, banking, or financial-services applications is a plus but not mandatory.

Proficient English (written & spoken).

Location:

[Chennai, India]

Other relevant information

Agile methodology - Scrum with two-week sprints; backlog managed in JIRA.

Testing methodology - Test-Driven Development (TDD) and Behaviour-Driven Development (BDD) using JUnit 5, Test containers, and Cucumber.

Infrastructure - Docker-based development, GitLab-CI pipelines, and ArgoCD for continuous delivery to

Kubernetes clusters.

Security - regular static code analysis (SonarQube) and dependency checks.