
JOB DESCRIPTION
Experience: 5-8 years
Location-Mumbai
Wissen Technology is now hiring for a Java Developer - Mumbai 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
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.
Connect with the team
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Responsibilities
- Technical Leadership & Architecture: Serve as a technical authority, define cloud-native standards, and own end-to-end system design for complex, distributed, and high-scale solutions.
- Engineering Excellence: Lead modernization initiatives, transition legacy systems to microservices, and ensure performance, scalability, and security.
- Platform & Cloud Enablement: Champion GCP-native services (GKE, Cloud Run, Pub/Sub, BigQuery, Cloud SQL, Spanner), influence CI/CD, and drive FinOps strategies.
- Mentorship & Organizational Impact: Mentor Lead and Senior Engineers, foster engineering rigor, and collaborate with Product Management to translate business strategy into technical solutions.
Required Skills, Experience & Background
- 12+ years of professional experience building enterprise-grade software systems.
- Proven experience operating at a Lead or Principal Engineer level.
- Strong hands-on experience with Java or another major programming language (e.g., Go, Python, C#).
- Deep expertise in microservices architecture, RESTful APIs, and distributed systems.
- Strong experience with SQL and NoSQL databases and data modeling.
- Expertise in cloud-native design principles (stateless services, scalability, resiliency).
- Strong experience building and operating systems on Google Cloud Platform (GCP).
- Proficiency with containers and orchestration (Docker, Kubernetes, GKE).
- Experience with CI/CD pipelines, Git-based workflows, and observability.
- Experience with Big Data and data engineering technologies (e.g., BigQuery, Spark).
Qualifications
- Bachelor’s degree in computer science or related field (required).
- Master’s degree in computer science or related field (preferred).
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
We're looking for highly skilled experienced engineers to design and build high-scale, cloud-based data processing systems that can handle massive amounts of data with low latency. You'll work with a team of smart, motivated, and diverse people and be given the autonomy and support to do your best work. This is a rare opportunity to make a meaningful impact in society while working in a dynamic and flexible workplace where you'll belong and be encouraged.
Qualifications:
- Bachelor's Degree required
- Significant experience with distributed systems.
- Experience with modern programming languages such as Java, C#, C/C++, or Ruby.
- Experience with container platforms such as DC/OS, Kubernetes
- Fluency in technologies and design concepts around Big Data processing and relational databases, such as the Hadoop ecosystem, Map/Reduce, stream processing, etc.
- Experience with production operations and good practices for putting quality code into production and troubleshooting issues when they arise.
- Effective communication of technical ideas verbally and in writing, including technical proposals, design specs, architecture diagrams, and presentations.
- Ability to collaborate effectively with the team and other stakeholders.
- Preferably, production experience with Cloud and data processing technologies.
Responsibilities:
As a member of the software engineering division, you will take an active role in the definition and evolution of standard practices and procedures. Define specifications for significant new projects and specify, design and develop software according to those specifications. You will perform professional software development tasks associated with the developing, designing and debugging of software applications or operating systems.
- Design and build distributed, scalable, and fault-tolerant software systems.
- Build cloud services on top of the modern OCI infrastructure.
- Participate in the entire software lifecycle, from design to development, to quality assurance, and to production.
- Invest in the best engineering and operational practices upfront to ensure our software quality bar is high.
- Optimize data processing pipelines for orders of magnitude higher throughput and faster latencies.
- Leverage a plethora of internal tooling at OCI to develop, build, deploy, and troubleshoot software.
- 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
1. Be a visible leader to drive and own the architecture and design of some of the most advanced & complex software systems / products in the industry to create company wide impact
2. Design systems that can scale to billions of data records in micro service architecture
3. Design and develop full stack product features based on customer and business requirements
4. Be an operational and technical leader with a passion for distributed systems, cloud service development, deployment and delivery
5. Technically Hands-on with scalable Architecture managing team of (30+) Sr. Engineers / Engineers, and coaching mentoring while maintaining a hands-on role with code development
6. Drive code and design reviews of components / systems / products in scope and drives the architectural governance for them
7. Set directional paths for the teams/department for adoption of new technology stacks for solving business problems
8. Be a very visible representative of multiple technology domains and represent Salesken in external technical forums
9. Teamwork skills, flexibility, and ability to handle multiple tasks
10. Bring in software engineering life cycle best practice
11. Analytical and problem-solving skills
Desired Candidate Profile
1. Strong Java, Java 8 including OOAD design patterns
2. A solid engineer with must have knowledge and experience of Micro services design, security designs, and best practices
3. Excellent knowledge and skills in the areas of Java, Spring Boot, JSP/Servlet, J2EE design patterns, App server & Web servers
4. Strong hands-on technology experience building and running large scale systems handling multi-million sessions/transactions per day
5. Excellent knowledge of RDBMS, NoSQL databases like MySQL and Cassandra
6. Strong design/development experience in building massively large scale distributed internet systems and products
7. Excellent programming skills in Java and expertise in multi-threading and performance oriented programming
8. Sound knowledge of cloud platforms like GCP, AWS, Azure, etc
9. Solid experience in Distributed systems, highly scalable products, performance & reliability
10. Excellent understanding of processing platforms and queues
11. Excellent understanding of standard protocols such as HTTP/HTTPS, DNS, SSL, etc
12. Experience and knowledge of open source software, frameworks and broader cutting edge technologies around server side development in Java
- Experience with Hibernate and Spring.
- Experience with Springboot, spring MVC
- Experience with all phases of the Software Development Lifecycle, including system analysis, design, coding, testing, debugging and documentation
- Teamwork & collaboration skills to work across organizations
- Problem solving skills to develop quick yet sound solutions to resolve complex issues
- Programming Language(s): Java, J2EE, JSON, HTML, DHTML, HTML 5, XML, EXTJS.
- Experience with XML/HTTP and Web Services
- Experience with HTML, JSP, CSS, JQuery / Ajax / JSON,
- Experience /Knowledge of Angular, React.
- Experience building J2EE based Web Applications
- Experience with MySql.
- Hands-on programmer with ability to write idiomatic code in Java
- Strong preference to write automated unit & integration tests
- Prior experience in designing & deploying Microservices and performant REST APIs
- Good understanding of and experience in Continuous Integration / Continuous Delivery
- Hand-on experience using one of the server-side Java frameworks such as Spring Boot
- Excellent communication skills
Nice to have
- Experience working with AWS or other Cloud providers
- Experience working in Event-Driven systems (using Apache Kafka or something similar)
- Exposure to Angular or React








