Sr Java Developer

Senior Java Developer

Location: Noida, Uttar Pradesh, India

Responsibilities

• Backend Development - Design, develop and maintain backend services using Java and Spring Boot.

• Build reliable and scalable REST APIs.

• Develop integration workflows involving orders, inventory, fulfilment, tracking and product data.

• Write clean, reusable and maintainable code.

• Implement validations, exception handling, retry mechanisms and failure recovery.

• Optimise existing modules for performance, reliability and scalability.

• Participate in architecture and technical design discussions.

• Refactor legacy code where required without affecting existing customers.

• API and Integration Development - Integrate with external platforms using REST and SOAP APIs.

• Work with API authentication mechanisms such as OAuth 2.0, API keys and access tokens.

• Handle pagination, rate limits, retries and API failures.

• Design and consume webhooks.

• Analyse API requests, responses and error messages.

• Develop data mapping and transformation logic between different platforms.

• Ensure integrations are idempotent and do not create duplicate transactions.

• Maintain compatibility with third-party API changes and version upgrades.

• Production Troubleshooting - Investigate production incidents using application logs, database records and monitoring tools.

• Identify root causes instead of applying temporary fixes.

• Analyse performance issues, memory problems, connection pool exhaustion and slow database queries.

• Troubleshoot intermittent API, webhook, scheduler and queue-related failures.

• Provide technical findings to support, QA and operations teams.

• Implement permanent corrective and preventive actions.

• Participate in critical incident resolution when required.

• Database Development - Design and maintain MySQL database structures.

• Write and optimise SQL queries.

• Create appropriate indexes and analyse execution plans.

• Handle large-volume data processing efficiently.

• Identify duplicate, inconsistent or incomplete records.

• Work safely with production data and database migrations.

• Understand transactions, locking, isolation levels and concurrency.

• Code Quality and Reviews - Review code written by other developers.

• Identify defects, security issues, performance risks and maintainability concerns.

• Enforce coding standards and engineering best practices.

• Write unit and integration tests.

• Ensure adequate test coverage for critical workflows.

• Participate in pull-request reviews and release validation.

• Mentor junior and mid-level developers.

• Performance and Scalability - Design systems that can process high-volume orders and API transactions.

• Improve scheduler, batch and queue-processing efficiency.

• Identify memory, CPU, thread and database bottlenecks.

• Design asynchronous processing where appropriate.

• Ensure that services fail safely and recover correctly.

• Support horizontal and vertical scaling decisions.

• Cross-Functional Collaboration - Work closely with product analysts, business analysts, QA engineers and support teams.

• Understand business requirements and convert them into technical solutions.

• Clarify technical feasibility, dependencies and risks.

• Support QA in preparing technical and integration test scenarios.

• Provide technical estimates and implementation plans.

• Communicate delays, risks and blockers clearly.

  Requirements

• Work from the Noida office

• Participate in production incident resolution when necessary

• Collaborate with teams working on customer-facing integrations

• Follow secure development and data-handling practices

  Job Type

Full time

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