Senior Java Developer

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.