
Java Developer – Job Description
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. - 5-8 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.
About Wissen Technology:
Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in-class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.
Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’.
Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.
Wissen Technology offers 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.
We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.

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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About Company:
Our client is in the business of delivering cutting-edge software solutions, hardware systems, and IT services. It lends the right technological edge to governments and businesses. This enables them to achieve their organizational objectives efficiently and effectively to scale their businesses to newer heights.
Minimum Requirements/Qualifications:
(i) Minimum education qualification of MCA/ MSc (Computer Science)/BE/BTech (computers/ IT).
(ii) Must have at least 2.5 to 5 years of experience in application development, deployment, and testing. He/ She must possess a valid MySQL Developer or Java Developer certification, which is obtained at least six (06) months prior to the date of award of the contract to the firm.
(iii) Knowledge of Software Management Life Cycle and Software Testing viz unit testing, system testing & Integration Testing, etc.
(iv) Knowledge & hands-on experience of PHP & My SQL is a must. Additional knowledge of Post GreSQL, Typescript & Lit element, Java with Hibernate and Springs, SQL Server, Apache Tom Cat Server & relevant open-source technologies is required.
(v) Individuals must have hands-on experience in server operating systems viz Windows Server OS and RHEL. Knowledge of security concepts of web applications & Networking for undertaking necessary troubleshooting wrt applications accessibility.
(vi) Knowledge of Mobile Application Development
Key Responsibility Areas:
- Creation of new Course No, Term, and Term type at the beginning of each term. All associated Database tables and software procedures and functions are updated and recompiled.
- Management of Data Entry and Information access right to various users.
- AMC includes bug fixing, updating of application for any small policy changes.
- Regular Patch/update installation and coordinating with MIS team for identification and resolution of issues wrt application functioning and deployment
- Implementation of Cyber security policies and hardening of application
- Development of New functionalities in the application
- Regular Testing of running application functionalities and undertaking unit and integration testing of newly developed components.
- Support for making changes in the NDA internet web portal.
- AMC includes backing up of software, and database and storing it in other locations every week
- Online Multimedia Management System
- Software Wise Charter of Duties
- Cadet Suggestion/ Complaint Management System
About Klevu:
Klevu is a discovery experience suite that revolutionises online shopping. It provides a range of SaaS based solutions, that are deep rooted in AI-ML technology and delivered via cloud for online retailers. Klevu is a global Finnish company that prides in diversity, great team, excellent partner network and global customer footprint. Learn more from www.klevu.com
Experience: 5+ years
Location: Ahmedabad, Gujarat
Responsibilities:
- Build, scale and maintain various services on the Klevu platform
- Design and develop solutions for business needs on the Klevu platform
Must have skills:
- 4+ years on experience with Java
- Experience in Web application development on Spring framework
- Experience working with database technologies – RDBMS or NoSQL
- Ability to communicate effectively within and outside the engineering team
- Familiar with agile software development process
Nice to haves:
- Experience in Hibernate, MySql, Redis, ActiveMQ or Kafka
- Experience in UI Frameworks like Jquery, React, Angular or equivalent
- Experience in REST API development
- Experience in debugging issues and checking production logs
- Experience working in eCommerce and/or SAAS startups
- Experience working with microservices architecture
What we offer:
- Being part of one of the most exciting search technology company from Nordics with global footprints
- Work with a team in 3 continents (North America, Europe, Asia)
- Excellent work culture, hands-on, result oriented
- Good salary and flexible hours



Responsibilities:
• Take on complex problems that span multiple components and teams.
• Independently own one or more multiple modules, which include: requirement analysis, design, development, maintenance & support
• Write extensive, efficient code to address complex modules that handle the interaction between multiple components.
• Rapidly iterate to add new functionalities and solves complex problems with simple and intuitive solutions
• Produce architecture with clean interfaces, that are efficient and scalable
• Participate and contribute to architectural discussions
• Solve production issues. Investigate and provide solutions to minimize the business impact due to the outage
• Continuously improve performance metrics of modules you own.
• Collaborate effectively across teams to solve problems, execute and deliver results
Requirements:
• Experience: 3+ years
• A Bachelor's or Master's Degree in Computer Science
• Software engineering and product delivery experience, with a strong background in algorithms
• Experience in architecting & building real-time, large-scale e-commerce applications
• Experience with high-performance websites catering to millions of daily traffic is a plus
• Excellent command over Data Structures and Algorithms
• Experience with web technologies, Go/Java/Python
• Language: GO or Python
• Strong expertise in DS and Algo
• Strong leadership skills - have experience mentoring, building products from scratch or incumbent in design and architecture.
• Have worked in the scaling of the system right from scratch.
• Someone worked in small user base to a large user base and wrote optimized code
• Both HLD and LLD
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Job Description
We are looking for an analytical, results-driven back-end developer who will work with team members to troubleshoot and improve current back-end applications and processes. The Back-end Developer will use his or her understanding of java language and tools to analyze current codes and industry developments, formulate more efficient processes, solve problems, and create a more seamless experience for users. You should have excellent communication, computer, and project management skills.
To succeed as a backend developer, you should be focused on building a better, more efficient program and creating a better end-user experience. You should be knowledgeable, collaborative, and motivated.
Back-end Developer Responsibilities:
- Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement.
- Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience.
- Developing ideas for new programs, products, or features by monitoring industry developments and trends.
- Recording data and reporting it to proper parties, such as clients or leadership.
Participating in continuing education and training to remain current on best - practices, learn new programming languages, and better assist other team members.
- Taking lead on projects, as needed.
- Develop web applications and web services using Java Spring Boot, Spring Cloud Frameworks, AWS
Back-end Developer Requirements: - Bachelor’s degree in computer programming, computer science, or a related field.
- Fluency or understanding of specific languages, such as Java, Nodejs,React,JSON,PHP, or Python, and operating systems may be required.
- Strong understanding of the web development cycle and programming techniques and tools.
- Focus on efficiency, user experience, and process improvement.
Your Qualifications:
7 to 12 years of experience with majority as Java engineer
Strong hands on experience on building application using technologies Java, Spring, Hibernate, Maven/Gradle.
Experience in building Micro Services using Spring Boot / Go.
Strong knowledge and experience with SQL queries and databases like Postgre SQL/Oracle.
Strong knowledge and experience on Platform components such as Docker, Kubernetes and Service Mesh (Istio).
Good knowledge of scripting languages (preferably Python and Bash)
Familiarity with CI/CD environment (Jenkins).
Experience on Observability stack such as ELK Stack, Prometheus & Grafana would be added advantage.
Should have experience on Active MQ based async queuing system design and deployment.
Strong experience of system design and implementation of end-to-end integrated systems.
Familiarity with Hazelcast and Zk Solution would be a plus.
Strong skills to write technical design documentation.
Experience of leading a team as tech lead.
Ability to work effectively in a team environment as well as independently.
Good communication skills with tech/non-tech people.
What You'll Do:
Assigned to software development projects and/or system enhancements as tech lead.
Be engaged in a whole process of development project (requirements analysis, design, implementation, testing/verification, deployment, operation/maintenance).
Work closely with project manager and other engineers. Some of them are in different locations such as Japan and Singapore.
Always improve the design quality, code quality, testing quality and system quality spontaneously. In addition, create such a culture in our team.
Understand business needs and user behavior and develop solutions to those needs.
Develop and maintain a deep understanding of our systems and propose system improvements.
Guide and support less-experienced members as mentor and role model to improve the team productivity and achieve team’s goals together.
Better to Have:
Familiarity with Telecom Service Provider’s Billing Ecosystem/BSS Systems.
Familiarity with and experience on Cloud Native Technologies.
Familiarity with Agile Software development process.
Familiarity with and experience on Linux/Unix environment
Work experience with a remote team
Familiarity with Atlassian tools (JIRA, Confluence, HipChat)
Familiarity with source control system (Gitlab, SVN, etc.)
OUR COMMITMENT TO YOU:
You'll benefit from our network of global communities and collaborative culture that will help you build technical and functional skills and capabilities. And because we serve more than 28 countries industries globally, you'll have the opportunity to develop valuable industry-specific expertise.
The scale of our capabilities and client engagements and the unique way we innovate, operate and deliver value will give you the opportunity to deepen your existing skills even as you help create the latest technology trends. You'll have access to leading-edge technology.
· Experience in object-oriented design/programming and proven experience as a Software Developer
· Experience with software design and development in a test-driven environment.
· Self-starter with high level of commitment and motivation
Qualifications
- 4+ years of software development experience in Java 8. Knowledge of Java 9.
- Experience in developing micro services in Spring Boot or Node.js. Experience in security, transaction, Idempotency, log tracing, distributed caching, monitoring and containerization requirements of Micro services. Experience in developing High Cohesion & Loosely Coupled Micro Services
- Should have excellent acumen in Data Structures, Algorithms, problem-solving and Logical/Analytical skills. Thorough understanding of OOPS concepts, Design principles and implementation of different type of Design patterns.
- Sound understanding of concepts like Exceptional handling, Serialization/Deserialization and Immutability concepts, etc. Good fundamental knowledge in Enums, Collections, Annotations, Generics, Autoboxing, etc.
- Experience with Multithreading, Concurrent Package and Concurrent APIs
- Basic understanding of Java Memory Management (JMM) including garbage collections concepts.
- Experience in RDBMS or NO SQL databases and writing SQL queries (Joins, group by, aggregate functions, etc.)
- Hands-on experience with JMS. Hands-on experience in creating RESTful webservices and consuming webservices. Hands-on experience with Spring.
- Hands-on experience with any of the logging frameworks (SLF4J/LogBack/Log4j)
- Experience of writing Junit test cases using Mockito / Powermock frameworks. Should have practical experience with Maven/Gradle and knowledge of version control systems like Git/SVN etc.
- Good communication skills and ability to work with global teams to define and deliver on projects. Sound understanding/experience in software development process, test-driven development.
- 4+ years of software development experience in Java 8. Knowledge of Java9.
- Experience in developing micro services in Spring Boot or Node.js. Experience in security, transaction, Idempotency, log tracing, distributed caching, monitoring and containerization requirements of Micro services. Experience in developing High Cohesion & Loosely Coupled Micro Services
- Should have excellent acumen in Data Structures, Algorithms, problem-solving and Logical/Analytical skills. Thorough understanding of OOPS concepts, Design principles and implementation of different type of Design patterns.
- Sound understanding of concepts like Exceptional handling, Serialization/Deserialization and Immutability concepts, etc. Good fundamental knowledge in Enums, Collections, Annotations, Generics, Autoboxing, etc.
- Experience with Multithreading, Concurrent Package and Concurrent APIs
- Basic understanding of Java Memory Management (JMM) including garbage collections concepts.
- Experience in RDBMS or NO SQL databases and writing SQL queries (Joins, group by, aggregate functions, etc.)
- Hands-on experience with JMS. Hands-on experience in creating RESTful webservices and consuming webservices. Hands-on experience with Spring.
- Hands-on experience with any of the logging frameworks (SLF4J/LogBack/Log4j)
- Experience of writing Junit test cases using Mockito / Powermock frameworks. Should have practical experience with Maven/Gradle and knowledge of version control systems like Git/SVN etc.
- Good communication skills and ability to work with global teams to define and deliver on projects. Sound understanding/experience in software development process, test-driven development.
Additional Information
- Gender-Neutral Policy
- 18 paid holidays throughout the year for NCR/BLR (22 For Mumbai)
- Generous parental leave and new parent transition program
- Flexible work arrangements
- Employee Assistance Programs to help you in wellness and well being
Experience-3-5 yrs
Location- bangalore,pune,ggn,
Skills: Core java,j2EE,oops,Spring,Microservices
- 3+ to 6 years of hands-on coding experience in Java preferably Version 8
- Building RESTFUL services using Spring boot, Spring WS, etc
- Hands on experience in Microservices
- Data-Layer Development: MySQL, NoSQL, ORM

