Senior Java Developer

Experience: 8-12 years

Location: Bangalore

Wissen Technology is now hiring for a Senior 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. - 8-12 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 Us:

At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide.

Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. 

We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. 

Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Whether it’s AI/ML for unstructured data processing, cloud enablement, or data engineering, Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our proprietary Interview Ninja platform ensures we hire the best, building high-performing teams that deliver unmatched results. 

Today, Wissen Technology has a global footprint with 2200+ employees across offices in the US, UK, UAE, India, and Australia. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.

Website : www.wissen.com 

• A highly motivated and experienced frontend software engineer / developer with a proven track record (at least 5 years of experience).
• A Bachelor’s degree in computer science.
• Someone who loves to work in a multidisciplinary team of engineers and business colleagues in a high-tech environment.
• You are able to work in a dynamic and demanding environment, a real team player and a speak-up mentality to promote your ideas in a concise way.
• You are a problem-solver and see yourself as a hardcore web developer.
• You have knowledge of, and experience with, different web technologies.
• You are skilled with implementing architecture & design patterns.
• You can write modular code that is configurable, extensible and testable.
• You have great analytical skills, conceptual understanding and able to quickly understand new technical concepts.
• You have a strong interest in the latest trends in software development & web technologies.
• You have strong communication skills to explain complex technical concepts.
• You are fluent in English both in verbal and written.

Proficiency / experience with following technologies & tools:

• Thorough and deep understanding of Java JDK 11+, our foundational programming language

Spring Framework & AOP v5.2+

• Proven experience working with, and a deep understanding of Spring Boot 2.5+ and its modules (Web, Data JPA, Security OAuth2) and ability to explain complex use-cases related to persistency and web security
• Experience with Maven v3+
• Experience with containerization and deployments tools (eg. Docker v20+ and Kaniko, Helm (charts) v3+ with  Kubernetes deployments)
• Experience working with CI/CD tools like GitLab SCM & pipelines and JFrog Artifactory
• Strong knowledge working with different types of SQL and NoSQL databases such as PostgreSQL v12+, MongoDB v4+ and Neo4J v4+
• Proficient in working with DevOps engineers on Cloud deployments (eg. Azure subscriptions)
• Experience in Agile/Scrum & (pref.) SAFe (Scaled Agile Framework) and enabling tooling – Atlassian Jira Cloud / Jira Align
• Experienced and skilled in full-stack development.
• Leading and solutioning product development of secure and high-performance applications.
• Good understanding of REST APIs and working knowledge of HTTP(S).
• Experienced in testing stack – Junit / Mockito
• Experience with software quality & vulnerability testing – SonarQube and Blackduck
• Proficient in writing software documentation on Atlassian Wiki
• Proficient in implementing data structures, algorithm design and OOPs concepts.

• Strong experience in Core Java, Multi-Threading, data structures (List/Map/Set) and unit testing
• with (Junit, Mockito)
•  Strong experience with Spring Framework (Spring MVC, Spring REST, Spring Data), ORM
• frameworks (JPA, Hibernate) and RDBMS (Oracle/MySQL/Postgres)
•  Strong experience in applying Object-Oriented design principles and Design Patterns
•  Good knowledge of Multi-Tier architecture, Micro Services architecture and Service Oriented
• Architecture 
•  Exposure to AWS Cloud, NoSQL Database (Mongo, Cassandra), Message Broker (Active
• MQ/RabbitMQ/Apache Kafka) and Big Data Technologies (Hadoop/Hive/Spark)
•  Additionally, must possess capability to review code, produce technical specification document
• and knowledge of code quality tools (PMD/FindBugs/Sonar)

Required Skills:

• 3+ years of experience in the Development of JAVA technology.
• Strong Java Basics
• SpringBoot or Spring MVC
• Hands-on experience in Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
• Proficient in REST API development
• Messaging Queue (RabitMQ or Kafka)
• Microservices
• Any Caching Mechanism
• Good at problem-solving

Good to Have Skills:

• 4+ years of experience in using Java/J2EE tech stacks
• Good understanding of data structures and algorithms.
• Excellent analytical and problem-solving skills.
• Ability to work in a fast-paced internet start-up environment.
• Experience in technical mentorship/coaching is highly desirable.
• Understanding AI/ML algorithms is a plus.

• 2 + years of software development experience utilizing Java based frameworks and technologies to build enterprise grade product solutions.
• 2+ years of experience designing, developing and documenting RESTful APIs.
• Strong understanding of concepts/technologies like Spring MVC, Spring boot, J2EE, EJB, application/API security, API governance/gateway platforms like apigee or kong.
• Good understanding of RDMS concepts and development preferably using MS SQL Server.
• Experience using test automation technologies like cucumber, selenium is a big plus.
• Partner with scrum masters to address technical blockers/impediments to progress.
• Prior experience working with agile scrum-based development methodology. Participate in sprint planning and estimate development efforts for features and stories.
• Partner with DevOps to install and configure/tune application containers like embedded Spring boot tomcat and webserver technologies preferably nginx or apache.
• Partner with cloud engineering group to outline the infrastructure provisioning requirements/needs for new product development.
• Design and develop CI/CD tools and process preferably using Jenkins to configure build jobs for APIs and design pipeline to promote artifacts from development all the way to production
• Experience with messaging technologies like kafka is a huge plus
• Work with Test Automation engineering team to integrate test automation scripts as part of the CI/CD process.
• Prior proven experience of utilizing and productionizing container/container orchestration technologies like Docker, kubernetes.
• Participate and Resolve issues related deployments, application performance etc.

We are looking for a Back-end developer to join our engineering team and help us develop and maintain various software products.

Experience: 0-2 years 

Prerequisites:

• In-depth understanding of web development process 
• Familiarity with Java and Spring frameworks preferably Spring Boot
• Familiarity with Node JS
• Basic understanding of front-end technologies, such as JavaScript, HTML, CSS.
• Experience with working on REST API (GET, POST, PUT, PATCH, DELETE, UPDATE)

Job Description

The duties and responsibilities of a selected applicant would include:

• Participate in the entire application lifecycle, focusing on coding and debugging.
• Design and implement low-latency, high-availability, and performance applications.
• Develop back-end components to improve responsiveness and overall performance
• Collaborate with Front-end developers to integrate user-facing elements with server-side logic
• Perform UI tests to optimize performance
• Test and debug programs
• Implement security and data protection solutions

If you have the desire to be a part of an exciting, challenging,+ and rapidly-growing company, and create the finest apps in a flourishing industry, please send in your applications on:

Technologies

Must have                         Core JAVA, J2EE, Multithreading, OOPS, and Multiprocessing

Great to have                   RabbitMQ, Netty, XML, JSON, Messagepack

Huge Advantage:             Good at mathematics, statistics, complex data structures, algorithms, and design patterns

Other skills

• Ability to understand most complex and challenging problems and solve them from users’ view point
• Ability to create and present software designs (as per the aligned solution) to the product owner
• Ability to build and create modules from scratch.
• Ability to write, understand and deal with large code base
• Experience in understanding and implementing design patterns
• Ability to provide technical leadership to a team of equally talented, efficient and motivated engineers

Roles and responsibilities

• Responsible for solving the most complex and seemingly impossible problems related to variety of dimensions of software engineering. Dealing with Big Data to Complex Data Structures, From Inter Process Communication to sub 100 MilliSec server responses, From Distributed Systems to 99.999 Availability.
• Responsible for providing technical leadership to a team of 3-4 Engineers
• Responsible to drive delivery of a project/module and report to Product Owner
• Responsible for functional/technical tracking of a project/module

Responsibility Split

• 80% Technology, 20% Team management
• With 80:20 split this is definitely a technology oriented role suitable for geeks.