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 Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.