Sr Java Backend developer

Job Description: Senior Java Developer

Company:
Zaps Group

Location:
Hyderabad, Telangana, India

Experience Level:
8+ Years

Position:
Full-Time

About the Role

Zaps Group is seeking a highly skilled and experienced Senior Java Developer
to join our talented engineering team. In this role, you will be a key contributor to the design, development, and maintenance of our mission-critical backend systems. You will leverage your deep expertise in
Java, Spring Boot, and microservices architecture
to build high-performance, scalable, and secure applications that power our business.

The ideal candidate is a passionate problem-solver with a commitment to code quality, a collaborative mindset, and a proven track record of delivering robust enterprise-level solutions. If you are ready to take on complex challenges and make a significant impact, we want to hear from you.

Key Responsibilities:

Core Backend Development

• Design, develop, and maintain high-performance, scalable, and secure backend applications using
  Core Java
  and the
  Spring Boot
  framework.
• Build and consume robust
  RESTful APIs
  , ensuring seamless integration with front-end applications and third-party systems.
• Architect and implement solutions within a multi-tier architecture, including service layers, repositories, and controllers.

Microservices Architecture

• Develop, deploy, and maintain independent microservices using
  Spring Boot
  and
  Spring Cloud
  .
• Implement essential microservices patterns, including service discovery (e.g., Eureka), centralized configuration, and API gateways (e.g., Spring Cloud Gateway).
• Ensure services are loosely coupled, independently deployable, and resilient.

Database & Persistence Layer

• Design and optimize database schemas and write efficient, high-performance SQL queries.
• Utilize ORM frameworks like
  Hibernate/JPA
  for effective data persistence and object-relational mapping.
• Manage database transactions, implement connection pooling, and perform performance tuning to ensure data integrity and speed.

Security Implementation

• Implement robust authentication and authorization mechanisms using
  Spring Security
  , including standards like
  JWT
  and
  OAuth2
  .
• Secure REST APIs, protect sensitive endpoints, and ensure the application is shielded from common security vulnerabilities.

Code Quality & Testing

• Write clean, maintainable, and efficient code, strictly adhering to
  SOLID principles
  and industry best practices.
• Develop comprehensive unit tests (
  JUnit, Mockito
  ) and integration tests to ensure reliability and stability code.
• Actively participate in peer code reviews to maintain high code quality standards across the team.

DevOps & Deployment

• Collaborate with the DevOps team to build and manage
  CI/CD pipelines
  using tools like Jenkins or GitHub Actions.
• Package applications into
  Docker
  containers and manage deployments in environments like
  Kubernetes
  or cloud platforms (AWS, GCP, Azure).
• Monitor application performance, analyze logs (e.g., ELK Stack, Prometheus), and ensure high availability.

Mentoring & Leadership

• Mentor junior developers, provide technical guidance, and contribute to the team's continuous learning and upskilling.
• Potentially lead small project teams or modules, taking ownership of architectural decisions and code quality.

Skills and Qualifications

Required:

• 8+ years
  of professional experience in Java development.
• Expert-level proficiency in
  Core Java
  and the
  Spring Framework (specifically Spring Boot)
  .
• Strong, hands-on experience in designing and building
  microservices
  .
• In-depth knowledge of
  Spring Security (JWT/OAuth2)
  ,
  JPA/Hibernate
  , and
  RESTful API
  design.
• Proficiency with relational databases (e.g., PostgreSQL, MySQL) and writing complex SQL.
• Experience with unit testing frameworks like
  JUnit
  and
  Mockito
  .
• Solid understanding of
  Git
  for version control and experience with project management tools like
  JIRA
  .

Preferred:

• Experience with
  Spring Cloud
  components.
• Familiarity with containerization (
  Docker
  ) and orchestration (
  Kubernetes
  ).
• Hands-on experience with
  CI/CD pipelines
  and cloud platforms (AWS, GCP, or Azure).
• Knowledge of monitoring tools like Prometheus, Grafana, or the ELK Stack.
• Experience with API documentation tools like
  Swagger/OpenAPI
  .