Java Developer

Minimum 3+ Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork joins pool and other threading concepts)

? Good knowledge of the JVM with an understanding of performance and memory optimization.

? Extensive and expert programming experience in JAVA programming language (strong OO skills preferred).

? Excellent knowledge on collections like, Array List, Vector, LinkedList, HashMap, Hash Table, HashSet is mandate.

? Exercised exemplary development practices including design specification, coding standards, unit testing, and code-reviews.

? Expert level understanding of Object-Oriented Concepts and Data Structures

? Good experience in Database (Sybase, Oracle or SQL Server) like indexing (clustered, non-clustered), hashing, segmenting, data types like clob / blob, views (materialized), replication, constraints, functions, triggers, procedures etc.

JOB DESCRIPTION

Experience: 4+ years

Wissen Technology is now hiring for a Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. 4+ years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
• Good development experience with RDBMS.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

JOB DESCRIPTION

Experience: 4-9 years

Wissen Technology is now hiring for a Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. 4-9 years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
• Good development experience with RDBMS.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

JOB DESCRIPTION

Experience: 4 to 10 years

Location- Bangalore/ Mumbai

Wissen Technology is now hiring for a Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. 4 to 10 years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
• Good development experience with RDBMS.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

Must have

Experience in the Core Java development 

Good understanding of Object Oriented Design, Design Patterns and data structure algorithms

Experience in Multi-threading, Hashmaps, Collection arrays

Experience in Java collections

Experience in developing applications using Spring Boot

Proficient in building Micro Services with Java 1.8 or higher, J2EE, Spring, Spring Boot.

Proficient with No SQL and Relational Databases

Hands on experience in Unit testing frameworks like Junit / Mockito OR TDD

Job Summary:

We are seeking highly skilled Java Developers with hands-on experience in developing 

enterprise-scale applications, preferably within the financial services domain. The role 

requires expertise in Core Java, Microservices, and high-performance server-side 

development.

Key Responsibilities:

• Design, develop, and maintain enterprise-scale n-tier applications in the financial 

domain.

• Develop complex, low-latency, client-facing applications with a focus on performance 

and scalability.

• Work with Microservices architecture, Data Structures, OOPs, Algorithms, and 

Multithreading.

• Perform high-level and low-level design for critical applications.

• Collaborate with cross-functional teams to define, design, and deliver new features.

• Ensure best practices in coding, architecture, and application performance.

Requirements:

• Strong experience in Core Java 5.0 and above, Spring, and CXF.

• Extensive experience in enterprise application design patterns and architecture.

• Strong development experience with RDBMS (preferably Sybase).

Experience: 7+ years

Location: Mumbai

Mode of Work: Hybrid

• Hands-on expertise in multithreading and high-volume server-side applications.

• Experience in sales and trading platforms in investment banking/capital markets.

• Basic working knowledge of Unix/Linux.

• Excellent problem-solving and coding skills in Java.

• Strong interpersonal, communication, and analytical skills.

• Ability to express design ideas and collaborate effectively with teams

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

We are looking for someone who:

• Has strong expertise in Java Backend Development
• Has excellent problem-solving and analytical skills
• Can work independently as well as collaborate effectively with teams
• Has experience working on enterprise-scale applications
• Is comfortable working in a fast-paced environment
• Has AI experience or a good understanding of AI concepts, tools, or AI-powered applications

Experience

9–18 Years

Education

IIT / NIT graduates only

Interview Process

Candidates must be available for a Face-to-Face interview in Bangalore or Mumbai.

Key Responsibilities

• Design and develop scalable, high-performance Java applications.
• Lead a team of engineers and drive technical excellence.
• Architect enterprise-grade solutions and provide technical guidance.
• Collaborate with cross-functional teams to define, design, and deliver high-quality software.
• Review code, mentor team members, and ensure engineering best practices.
• Drive system design discussions and resolve complex technical challenges.

Required Skills

• Strong expertise in Core Java and Java ecosystem.
• Excellent problem-solving and analytical skills.
• Very strong coding ability with clean coding practices.
• Strong understanding of System Design and distributed systems.
• Hands-on experience in Java Architecture and designing scalable applications.
• Experience leading engineering teams and mentoring developers.
• Good understanding of software design principles, design patterns, and performance optimization.
• Strong communication and stakeholder management skills.

Preferred Skills

• Experience with Spring Boot, Microservices, REST APIs, and cloud technologies.
• Exposure to CI/CD, containerization, and modern DevOps practices is an advantage.