Full Stack Engineer

Role Overview

We are looking for an experienced Senior Java Developer with strong expertise in backend development and application/API security to design, develop, and maintain scalable, secure, and reliable backend services and REST APIs.

The ideal candidate will have strong hands-on experience with Java, Spring Boot, Spring Security, authentication, authorization, OAuth 2.0, JWT, RBAC, microservices, and secure API development . The candidate will work closely with frontend, mobile, QA, DevOps, security, and product teams to build enterprise-grade applications.

Key Responsibilities

• Design, develop, and maintain backend services using Java and Spring Boot .
• Design and develop scalable RESTful APIs and microservices .
• Implement business logic, workflows, backend integrations, and third-party API integrations.
• Develop secure APIs for mobile and web applications.
• Implement authentication and authorization mechanisms using Spring Security and industry-standard security protocols.
• Implement RBAC, OAuth 2.0, JWT, token validation, access control, and API security .
• Apply secure coding practices and identify and remediate application security vulnerabilities.
• Work with relational and NoSQL databases to design efficient data models and queries.
• Implement asynchronous processing and messaging using technologies such as Kafka or RabbitMQ .
• Optimize application performance, scalability, availability, and reliability.
• Develop unit and integration tests and maintain high code quality.
• Troubleshoot production issues and perform root-cause analysis.
• Implement logging, monitoring, auditing, and security controls.
• Collaborate with Android, frontend, QA, DevOps, security, and product teams.
• Participate in code reviews, technical discussions, and architectural decisions.
• Follow Agile development practices and contribute to technical documentation.

Required Skills

• 8+ years of professional experience in Java backend development.
• Strong hands-on experience with Java and Spring Boot .
• Strong experience with Spring Security .
• Strong understanding of Authentication & Authorization .
• Hands-on experience with OAuth 2.0, JWT, and RBAC .
• Strong knowledge of REST APIs, microservices, and secure API design .
• Good understanding of API security and secure coding practices .
• Knowledge of common OWASP/API security vulnerabilities .
• Experience with JPA/Hibernate .
• Strong SQL knowledge with PostgreSQL/MySQL .
• Experience with Redis and/or messaging systems such as Kafka/RabbitMQ .
• Understanding of HTTPS/TLS and secure communication.
• Experience with Git and CI/CD practices.
• Familiarity with Docker and cloud platforms such as AWS, Azure, or GCP.
• Strong debugging, troubleshooting, and problem-solving skills.

Preferred Skills

• Experience developing backend systems for mobile or enterprise applications .
• Experience with high-volume APIs and distributed systems.
• Knowledge of event-driven architecture .
• Experience with application performance optimization and scalability.
• Experience with security vulnerability assessment and remediation.
• Knowledge of OpenID Connect (OIDC) and service-to-service authentication.
• Experience with fintech, banking, payments, or other regulated environments.
• Basic understanding of device-management or enterprise mobility platforms .

Education

Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.

Key Competencies

• Strong backend architecture and design skills.
• Strong understanding of application and API security.
• Ability to write clean, maintainable, secure, and scalable code.
• Strong problem-solving and analytical skills.
• Good communication and collaboration skills.
• Ability to work independently in a fast-paced Agile environment.
• Strong ownership of production systems and technical deliverables.