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.