Java full stack developer role
First seen by Alion on Sep 1, 2026.
Cognizant is seeking a highly skilled Senior Java Full Stack Developer with strong expertise in Core Java, enterprise application development, and modern web technologies. The ideal candidate should possess exceptional analytical and problem-solving abilities, demonstrate strong coding proficiency, and have extensive hands-on experience developing and maintaining enterprise-grade applications using Spring MVC, Hibernate, Oracle, Kafka, and React JS.
The successful candidate will be responsible for designing, developing, optimizing, and supporting mission-critical business applications while collaborating with cross-functional teams in a fast-paced Agile environment.
Key Responsibilities
• Design, develop, enhance, and maintain scalable, high-performance Java-based enterprise applications.
• Analyse complex business requirements and translate them into efficient, maintainable, and scalable technical solutions.
• Write clean, optimized, reusable, and well-documented code following industry best practices and coding standards.
• Troubleshoot, debug, and resolve complex application issues while ensuring system stability and performance.
• Perform code reviews and mentor junior developers to ensure high-quality software delivery.
• Optimize application performance through code refactoring, tuning, and continuous improvement initiatives.
• Develop and maintain RESTful services and backend components.
• Work extensively with Oracle databases, including query optimization and performance tuning.
• Collaborate with business analysts, QA teams, architects, and stakeholders throughout the software development lifecycle.
• Contribute to frontend development using React JS and modern JavaScript frameworks.
• Participate actively in Agile ceremonies including sprint planning, reviews, retrospectives, and daily stand-ups.
Mandatory Technical Skills
Core Java Expertise
• Strong hands-on experience in Core Java development.
• Ability to independently solve complex coding and algorithmic problems.
• Deep understanding of:
o String Handling & Immutability
o Collection Framework
o Concurrency & multi-threading
o Object-Oriented Programming (OOP)
o Exception Handling
o JVM Internals
o Design Patterns
Backend Development
• Spring MVC
• Hibernate / JPA
• REST API Development
• Apache Kafka
• Oracle Database
• SQL, Query Optimization, and Database Performance Tuning
Frontend Development
• React JS
• JavaScript (ES6+)
• HTML5
• CSS3
Essential Competencies
• Strong analytical thinking and problem-solving capabilities.
• Ability to explain technical decisions, trade-offs, and implementation approaches.
• Experience in application debugging, code optimization, and performance tuning.
• Strong communication and stakeholder interaction skills.
Good-to-Have Skills
• Spring Boot
• Microservices Architecture
• AWS Cloud Services
• CI/CD Tools and DevOps Practices
• Agile/Scrum Methodologies
• Containerization technologies such as Docker and Kubernetes
Desired Candidate Profile
• 8–12 years of hands-on software development experience.
• Proven track record of delivering enterprise-scale applications.
• Strong understanding of software engineering principles and best practices.
• Ability to work independently and collaborate effectively within distributed teams.
• Passion for developing high-quality, scalable, and maintainable software solutions.
• Strong ownership mindset with the ability to drive technical discussions and solution design.
Preferred Notice Period: Immediate to 30 Days
Skills
React.js, Spring MVC, REST API Development, SQL, Query Optimization, and Database Performance