Full-Stack Engineer Java/Spring Boot + React JS

We are hiring a Principal Full Stack Engineer (Java + React) with 5+ years of experience to design, develop, and maintain scalable software solutions. The ideal candidate will have strong expertise in Java, Spring Boot, and React. Key Responsibilities: Develop and Maintain Backend of Applications: Design, develop, and maintain secure, scalable applications using Java and Spring Boot. Implement robust RESTful APIs, SOAP APIs, and microservices for seamless integration with other services. Develop and Maintain Web Applications Frontend: Contribute to web frontend development using React JS to build integrated, end-to-end solutions Data Interchange and Serialization: Work with JSON and XML for data interchange between services and handle data serialization/deserialization effectively. System Design and Architecture: Apply design patterns and architectural best practices to build efficient, maintainable code. Conduct system and component design reviews to ensure compliance with best practices and standards. Encryption and Security: Implement and manage encryption/decryption mechanisms to ensure data security and compliance. Ensure secure communication protocols and data storage using encryption standards like AES, RSA, and TLS. Production Deployment and Maintenance: Oversee production deployments, ensuring zero downtime and robust rollback mechanisms. Monitor applications post-deployment, handle troubleshooting, and improve system stability. CI/CD Pipeline Management: Establish and manage CI/CD pipelines using tools such as Jenkins, GitLab CI, or GitHub Actions. Ensure smooth deployment workflows with automated testing and configuration management.   Database Management: Develop database schemas, write optimized queries, and manage integrations with relational databases like MySQL, PostgreSQL, or Oracle. Experience with NoSQL databases such as MongoDB, Cassandra, or Redis is a plus. HTTP Protocol and Communication: Deep understanding of HTTP, HTTPS, and secure communication standards. Experience with HTTP methods (GET, POST, PUT, DELETE) and status codes. Testing and Quality Assurance: Implement unit testing, integration testing, and functional testing using frameworks like JUnit and Mockito. Write and maintain thorough test cases to ensure code quality and functionality. Collaboration and Mentorship: Collaborate with cross-functional teams (Product, DevOps, QA) to achieve project goals. Mentor junior developers, fostering best practices in code quality, documentation, and testing. Required Skills: Must be able to communicate fluently & effectively in English Java: Strong expertise in Java (preferably Java 11 or later versions). Spring Framework: Advanced knowledge of Spring Boot, Spring Data, Spring Security, and Spring Cloud. React JS: Hands-on experience with React JS frontend framework is a plus Design Patterns: Deep understanding of design patterns (e.g., Singleton, Factory, Observer) and their practical applications. Microservices Architecture: Experience in developing and managing microservices-based architectures. SOAP and REST APIs: Hands-on experience with both RESTful and SOAP APIs. JSON/XML: Proficiency in JSON and XML for data interchange and processing. HTTP Protocols: Solid understanding of HTTP/HTTPS protocols, methods, and secure communication standards. Encryption/Decryption: Experience implementing encryption/decryption for secure data storage and transfer (AES, RSA, TLS). CI/CD Pipelines: Proficiency in CI/CD tools like Jenkins, GitLab CI, or GitHub Actions. Database Management: Hands-on experience with relational databases (MySQL, PostgreSQL) and familiarity with NoSQL databases (MongoDB, Redis). Version Control and Collaboration: Git for version control; JIRA, Confluence, or similar tools for collaboration. Testing Frameworks: Proficient with JUnit, Mockito, or other testing frameworks for unit and integration testing. Cloud Platforms: Experience with cloud services such as AWS is highly desirable. Qualifications: Bachelor’s degree in computer science or related discipline Preferred Qualifications: Experience with containerization (Docker) and orchestration tools (Kubernetes). Exposure to Agile/Scrum methodologies. We have an amazing team of 700+ individuals working on highly innovative enterprise projects & products. Our customer base includes Fortune 100 retail and CPG companies, leading store chains, fast-growth fintech, and multiple Silicon Valley startups. What makes Confiz stand out is our focus on processes and culture. Confiz is ISO 9001:2015 (QMS), ISO 27001:2022 (ISMS), ISO 20000-1:2018 (ITSM), ISO 14001:2015 (EMS), ISO 45001:2018 (OHSMS) Certified. We have a vibrant culture of learning via collaboration and making workplace fun. People who work with us work with cutting-edge technologies while contributing success to the company as well as to themselves.  To know more about Confiz Limited, visit: https://www.linkedin.com/company/confiz-pakistan/