Backend Engineer (Java)

Mandatory Requirements

Experience & Education
• 6+ years of professional software development experience building backend systems in Java .
• Bachelor’s degree in Computer Science or a closely related field.

Core Backend Development (Java Ecosystem)
• Strong proficiency in Java SE / EE with hands-on experience in :
• Spring Boot (service development, configuration, dependency injection, actuator).
• Spring MVC (controllers, interceptors, validation, exception handling).
• Hibernate (ORM mappings, JPQL / HQL, transactions, performance tuning).
• Struts (legacy maintenance and migration awareness).
• Proven ability to design and implement RESTful microservices , including :
• API design, versioning, error handling, and request / response validation.
• Inter-service communication patterns and resilience (timeouts, retries).
• Secure service endpoints and token-based authentication / authorization.

Architecture & Design
• Practical application of Domain-Driven Design (DDD) for complex domains :
• Entity / value-object modeling, aggregates, repositories, services.
• Bounded contexts and anti-corruption layers.
• Ability to conduct and contribute to low-level and high-level design artefacts.
• Experience with hardware sizing / performance considerations to meet concurrency and throughput requirements (e.g., supporting ~100k concurrent requests without server-side throttling).

Data & Storage
• Production experience with MS SQL and Oracle SQL :
• Schema design, indexing, stored procedures / functions, query optimization.
• Transaction management and data integrity in high-throughput systems.
• Hands-on implementation with ElasticSearch :
• Index design, mappings, analyzers, search queries / aggregations.
• Performance considerations and scaling.
• Operational experience with Logstash pipelines for ingest / transform and reliable logging / observability.

Security & Identity
• Implementation experience with OpenID authentication flows :
• Integrating third-party OpenID providers for user authentication.
• Token validation and secure session management.
• Strict adherence to secure coding practices :
• Input validation, output encoding, secrets management, least privilege.

Build & Runtime Tooling
• Proficiency with Maven (multi-module builds, dependency management, packaging).
• Proficiency with Git and SVN for version control :
• Branching strategies, code reviews, and release management.
• Experience deploying and operating Java services on Apache Tomcat :
• JVM tuning, thread pool configuration, connection pools, and diagnostics.

Observability, Reliability & Performance
• Ability to implement effective logging, monitoring, and tracing :
• Structured logs via Logstash, correlation IDs, and actionable dashboards.
• Demonstrated performance tuning :
• Profiling, memory / CPU benchmarking, connection pool tuning, caching strategies.
• Incident handling and root-cause analysis within production environments :
• Creating runbooks, participating in on-call, and delivering corrective actions.

Web Fundamentals (Integration Support)
• Working knowledge of HTML, CSS, Bootstrap, jQuery , and JavaScript sufficient to :
• Collaborate with frontend teams and validate backend–UI integration.
• Support and troubleshoot UI-driven backend services.

Product Development & Collaboration
• End-to-end feature ownership from requirements to deployment .
• Experience performing code reviews , maintaining code quality , and mentoring peers.
• Cross-functional collaboration with Product and Support teams to align deliverables, triage issues, and ship on schedule.

Quality & Delivery
• Commitment to writing maintainable, testable code :
• Unit / integration tests, mocking / stubbing, test data management.
• Ability to define and meet SLAs / SLOs for backend services and APIs.
• Strong documentation habits for designs, APIs, and operational procedures.