
Job Title: Java Developer
Location: Chennai
Experience: 3+ Years
Employment Type: Full-time
Job Description:
We are looking for a skilled and passionate Java Developer with a strong foundation in Core Java and Object-Oriented Programming concepts. The ideal candidate should possess excellent communication skills and have hands-on experience with multi-threading, collections, databases, and backend development frameworks like Spring and Spring Boot. Exposure to cloud platforms and frontend technologies is a plus.
Key Responsibilities:
- Design, develop, and maintain scalable Java applications using Core Java and Spring Boot.
- Apply strong knowledge of Java Collections Framework and concurrent programming techniques including ExecutorService, ForkJoinPool, and other threading mechanisms.
- Optimize JVM performance and memory usage.
- Participate in all phases of the software development lifecycle: requirement gathering, design, development, testing, and deployment.
- Write clean, maintainable code following best practices, coding standards, and design patterns.
- Conduct code reviews, unit testing, and participate in peer programming.
- Collaborate effectively with team members and stakeholders to deliver high-quality solutions.
- Interact with databases like Oracle, Sybase, or SQL Server, with a strong understanding of views, triggers, indexing, and stored procedures.
Must-Have Skills:
- 3+ years of hands-on experience in Core Java
- Strong understanding of Collections, Multithreading, and Concurrency
- Proficient in Spring Framework, especially Spring Boot
- Deep understanding of Object-Oriented Design and Data Structures
- Strong experience in RDBMS (Sybase/Oracle/SQL Server) including indexing, replication, CLOB/BLOB types, views, and procedures
- Excellent written and verbal communication skills
Good to Have:
- Exposure to Microservices architecture
- Familiarity with NoSQL databases
- Knowledge or willingness to work on frontend technologies
- Experience working with public cloud platforms (AWS, Azure, GCP)
Soft Skills:
- Strong analytical and problem-solving skills
- Team player with a proactive attitude
- Ability to work independently and in a fast-paced environment
If you are passionate about Java development and want to work on cutting-edge technologies in a collaborative environment, we would love to hear from you.
Let me know if you want this converted into a company-branded format or with CTC/NP details added.

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
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Role Overview
We are seeking a skilled Java Developer with a strong background in building scalable, high-quality, and high-performance digital applications on the Java technology stack. This role is critical for developing microservice architectures and managing data with distributed databases and GraphQLinterfaces.
Skills:
Java, Cloud- AWS/ GCP/ Azure, NoSQL, docker, contanerization
Primary Responsibilities:
- Design and develop scalable services/microservices using Java/Node and MVC architecture, ensuring clean, performant, and maintainable code.
- Implement GraphQL APIs to enhance the functionality and performance of applications.
- Work with Cassandra and other distributed database systems to design robust, scalable database schemas that support business processes.
- Design and Develop functionality/application for given requirements by focusing on Functional, Non Functional and Maintenance needs.
- Collaborate within team and with cross functional teams to effectively implement, deploy and monitor applications.
- Document and Improve existing processes/tools.
- Support and Troubleshoot production incidents with a sense of urgency by understanding customer impact.
- Proficient in developing applications and web services, as well as cloud-native apps using MVC framworks like Spring Boot, and REST API.
- Thorough understanding and hands-on experience with containerization and orchestration technologies like Docker, Kubernetes, etc.
- Strong background in working with cloud platforms, especially GCP
- Demonstrated expertise in building and deploying services using CI/CD pipelines, leveraging tools like GitHub, CircleCI, Jenkins, and GitLab.
- Comprehensive knowledge of distributed database designs.
- Experience in building Observablity in applications with OTel OR Promothues is a plus
- Experience working in NodeJS is a plus.
Soft Skills Required:
- Should be able to work independently in highly cross functional projects/environment.
- Team player who pays attention to detail and has a Team win mindset.
Please find below updated JD for Java requirement.
-Work with a performance-oriented team driven by ownership and open to experiment.
- -6+ years of Java advanced software development experience, with concurrent (multi-threaded) programming highly desirable.
- -Strong experience on Core Java 8, Java EE, Spring Boot, Maven and Docker including Multi-threading.
. -Strong problem solving skills, computer science fundamentals, data structures and algorithms.
- -Hands on experience with any SQL Database.
- -Ability to learn new technologies like ELK, stack, redis etc.
- -Must have expert level knowledge in Java, Springboot.
- -Must have knowledge or hands on experience in microservices, apache kafka and distributed caching.
. -Experience in distributed/scalable systems
- -Strong knowledge of design patterns and software engineering best practices.
- -Familiarity with standard development tools and processes: Git, Eclipse, JUnit test, debugging, profiling, etc.
. -Familiarity with CI/CD and DevOps
. -Strong knowledge and previous experience in end-to-end design, development and subsequent
support of large-scale data processing systems
. - Familiarity and confidence working in an agile development environment.
. - Good Problem solving skills
- - Good oral and written communication skills.
- - Strong debugging skills.
- 5 years of experience as Java/Jee Developer, Springboot
- Good knowledge of OOPS concepts.
- Experience in Java8, JSP, Spring Core, Spring MVC, Spring Rest & Spring JPA Repository
- Experience in Hibernate, relational databases and sql.
- Experience in Rest API development.
- Experience in implementation of Jasper Reports
- Familiar with Git & Maven
Signalling, interlocking system
• Participate in Requirement Analysis and Design activities
• Develop code, unit testing, integration testing
• Perform module integration and integration testing
• Prepare and review Test Reports
• Actively participate in technical meetings and share ideas clearly
• Manage a team of engineers and provide leadership with clear communication
• Good at documentation
• And any other project related activity assigned
Good knowledge on Microservices , spring boot , Rest API , Algorthims, Data Structures.
Always a plus who can join immediately.
CricStox is a Pune startup building a trading solution in the realm of gametech x fintech.
We intend to build a sport-agnostic platform to allow trading in stocks of sportspersons under any sport
through our mobile & web-based applications.
We’re currently hiring a Backend Cloud Engineer who will gather, refine specifications and requirements
based on technical needs and implement the same by using best software development practices.
Responsibilities?
● Mainly, but not limited to maintaining, expanding, and scaling our microservices/ app/ site.
● Integrate data from various back-end services and databases.
● Always be plugged into emerging technologies/industry trends and apply them into operations and
activities.
● Comfortably work and thrive in a fast-paced environment, learn rapidly and master diverse web
technologies and techniques.
● Juggle multiple tasks within the constraints of timelines and budgets with business acumen.
What skills do I need?
● Excellent programming skills in Javascript or Typescript.
● Excellent programming skills in Nodejs with Nestjs framework or equivalent.
● A solid understanding of how web applications work including security, session management, and
best development practices.
● Good working knowledge and experience of how AWS cloud infrastructure works including services
like APIGateway, Cognito, S3, EC2, RDS, SNS, MSK, EKS is a MUST.
● Solid understanding of distributed event streaming technologies like Kafka is a MUST.
● Solid understanding of microservices communication using Saga Design pattern is a MUST.
● Adequate knowledge of database systems, OOPs and web application development.
● Adequate knowledge to create well-designed, testable, efficient APIs using tools like Swagger (or
equivalent).
● Good functional understanding of ORMs like Prisma (or equivalent).
● Good functional understanding of containerising applications using Docker.
● Good functional understanding of how a distributed microservice architecture works.
● Basic understanding of setting up Github CI/CD pipeline to automate Docker images building,
pushing to AWS ECR & deploying to the cluster.
● Proficient understanding of code versioning tools, such as Git (or equivalent).
● Hands-on experience with network diagnostics, monitoring and network analytics tools.
● Aggressive problem diagnosis and creative problem-solving skills.
- B.E/B.Tech or any relevant Masters degree from reputed college
- 2 to 4 years of experience with Java / J2EE application development stack
- Experience with: Spring framework(Core, JPA, Security, Boot), Hibernate, Secure APIs using JWT/OAUTH
- Good understanding of OOPS concepts
- Proficient understanding of code quality standards
- Solid experience in design, coding, unit testing and debugging
Good to have: Optional
- Working experience with microservices, sonar, docker, K8s, jenkins
- Knowledge of AWS cloud
- Deep understanding of technologies and architecture for a scalable and highly available set-up
- Experienced in Java/Golang and related Technologies like Spring/Hibernate
- Strong networking and Operating Systems fundamentals
- Experienced in Streaming technologies like Kafka
- Experience working with SQL and NoSQL Databases
- Experienced in developing the long-term tech strategy for analytics and translate that into an achievable roadmap

- Understand the overall requirements of the product/platform and specifically for the assigned feature/module.
- Design and Develop Software as per the product architecture and requirements.
- Code and unit testing of the feature/modules including appropriate design reviews and code inspections.
- Ensure adherence to the software development processes.
- Investigates software/system problems to isolate the root cause and provides innovative solutions.
- Collaborates with cross-functional teams (locally & globally) to ensure product releases meet quality, performance, scalability, reliability, and schedule goals.
Qualifications
- Bachelor’s or Master’s degree in Computer Science, Software Engineering or Information Technology.
- 6-10 years of experience in software development using J2EE technologies
- Experience with Core Java, JEE5 (JSP/JMS/Web Services/Servlets), Spring, Hibernate, REST, JBOSS/Tomcat Servers
- 1+ years of experience using Azure IOT technologies
- Work experience in Azure IoT Suite: IoT HUB, Azure TSI, DPS, Service Bus, Azure Functions, Azure KeyVault, MCI/AKS, Azure AD
- Knowledge in Azure Data Lake, Azure SQL
- Strong understanding of object-oriented programming
- Knowledge in ReactJS, JQuery is a plus
- Good knowledge in SQL -preferable
- Must have worked in agile/scrum environment
- Good understanding of software development processes, preferably for a regulated medical devices environment (ISO13485/FDA)
- Ability to work with cross-functional and remote teams.
- Flexibility to work on different areas of the product/platform
- Good written and verbal English communication
- Ability to travel as needed (minimal)







