Job Responsibilities:
* Design, build, and maintain efficient, reusable, and reliable Java code
* Ensure the best possible performance, quality, and responsiveness of the applications
* Identify bottlenecks and bugs, and devise solutions to these problems
* Help maintain code quality, organization, and automatization
* Prepare the technical design of complex technology components
Mandatory Skills:
* Proficient in Java (JDK 1.7) or above JDK 8 preferable, with a good knowledge of its ecosystems with a knack for writing clean, readable Java code, writing reusable Java libraries along with knowledge of concurrency patterns in Java
* Solid understanding of object-oriented programming along with various design and architectural patterns
* Hands on experience with Spring, Spring Boot, JUnit
* Familiarity with concepts of MVC, Microservices, RESTful

About Matellio India Private Limited
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Company Name – Wissen Technology
Group of companies in India – Wissen Technology & Wissen Infotech
Work Location - Senior Backend Developer – Java (with Python Exposure)- Mumbai
Experience - 4 to 10 years
Kindly revert over mail if you are interested.
Java Developer – Job Description
We are seeking a Senior Backend Developer with strong expertise in Java (Spring Boot) and working knowledge of Python. In this role, Java will be your primary development language, with Python used for scripting, automation, or selected service modules. You’ll be part of a collaborative backend team building scalable and high-performance systems.
Key Responsibilities
- Design and develop robust backend services and APIs primarily using Java (Spring Boot)
- Contribute to Python-based components where needed for automation, scripting, or lightweight services
- Build, integrate, and optimize RESTful APIs and microservices
- Work with relational and NoSQL databases
- Write unit and integration tests (JUnit, PyTest)
- Collaborate closely with DevOps, QA, and product teams
- Participate in architecture reviews and design discussions
- Help maintain code quality, organization, and automation
Required Skills & Qualifications
- 4 to 10 years of hands-on Java development experience
- Strong experience with Spring Boot, JPA/Hibernate, and REST APIs
- At least 1–2 years of hands-on experience with Python (e.g., for scripting, automation, or small services)
- Familiarity with Python frameworks like Flask or FastAPI is a plus
- Experience with SQL/NoSQL databases (e.g., PostgreSQL, MongoDB)
- Good understanding of OOP, design patterns, and software engineering best practices
- Familiarity with Docker, Git, and CI/CD pipelines
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.
- Strong experience in core Java programming.
- Good experience in Spring and Hibernate
- Proficiency with JSF/third party JSF components framework
- Must have at least 2+ years exp. of Web application development with exp. in using any MVC framework
- Knowledge of OOP concepts, industry best practices, and design
- Professional, precise communication skills
- Work experience writing Unit tests
- Good understanding of web technology and enterprise-level applications
- Work experience in applying the best practices of Web Application development
- Working experience in an Agile team especially with SCRUM
- Good to have experience in JavaScript frameworks
- Good to have experience in JSON, HTML5, CSS and XML
Following Skills will be an added advantage
- Working experience of Prime-Faces
- Knowledge of Spring Web Flow
Behavioral Skill
- Should be self-motivated and a quick learner with a problem-solving mind-set
- Attention to detail and follow-through to achieve good quality and meet deadlines.
- Ability to work effectively in a team as well as in an individual environment
- Should have excellent written and verbal communication skills
Node.js Developer Responsibilities:
- Developing and maintaining server-side network components.
- Collaborating with front-end developers on the integration of elements.
- Designing customer-facing UI and back-end services for various business processes.
- Developing high-performance applications by writing testable, reusable, and efficient code.
- Implementing effective security protocols, data protection measures, and storage solutions.
- Running diagnostic tests, repairing defects, and providing technical support.
- Documenting Node.js processes, including database schemas, as well as preparing reports.
- Recommending and implementing improvements to processes and technologies.
- Keeping informed of advancements in the field of Node.js development.
Node.js Developer Requirements:
- At least two years of experience as a Node.js developer.
- Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
- Knowledge of front-end technologies such as HTML5 and CSS3.
- Superb interpersonal, communication, and collaboration skills.
- Exceptional analytical and problem-solving aptitude.
- Great organizational and time management skills.
- Availability to resolve urgent web application issues outside of business hours.
Responsibility and duties
• Understand the business objectives and create a weekly/quarterly roadmap for the team • Integration of user-facing elements developed by front-end developers with server-side logic.
• Reviewing the code written by subordinates to maintain quality of code
• Planning and implementing tests for the codes and fixing bugs
• Developing ideas for new programs, products, or features by monitoring industry developments and trends.
• Qualification and skills *
• Bachelor's Degree in Computer Science [Preferably B. Tech./B.E. (CSE/IT)]
• 2 Years+ experience in Back-end development • Knowledge of Redis assisted client-side caching
•Intermediate skill in Amazon Web Services frameworks and modules • Familiarity with relational or non-relational database [Preferably SQL and MongoDB]
• Familiarity with NodeJS
• Proficient in Ms Excel/Trello
EWar Games focuses on Sports, Mobile Games, Technology, Online Gaming, and Real Money Online Gaming. Their company has offices in Bengaluru. They have a small team that's between 11-50 employees.
Java Developers are responsible for analyzing user requirements and business objectives, determining application features and functionality, and recommending changes to existing Java-based applications, among other duties.
Responsibilities :-
Designing and implementing Java-based applications.
Analyzing user requirements to inform application design.
Defining application objectives and functionality.
Developing and testing software.
Handled Database Queries, Oracle 10G
Debugging and resolving technical problems that arise.
Producing detailed design documentation.
Proficient in Spring, Hibernate
Developing multimedia applications.
Ensuring continuous professional self-development.
Should have worked in JSP, Servlet
Solid Understanding of MVC, Eclipse
Working Experience on Tomcat/Jboss
Requirements :-
Degree in Computer Science or related field.
Minimum 1.5 years of Experience with user interface design, database structures, and statistical
analyses.
Analytical mindset and good problem-solving skills.
Excellent written and verbal communication.
Good organizational skills.
Ability to work as part of a team.
Attention to detail.
Job Location – Ambala Cantt, Haryana
Salary as per market standards
Java, J2EE, Spring Boot, REST services, PostgreSQL
Experience with Elastic Search or any NoSQL DB is preferable
We are looking for an experienced Back-end developer to join our IT team! As a Back-end Developer, you will be responsible for the server-side web application logic as well as for the integration of the front-end part.
- Be involved and participate in the overall application lifecycle
- Main focus on coding and debugging
- Collaborate with Front-end developers
- Define and communicate technical and design requirements
- Provide training, help and support to other team members
- Build high-quality reusable code that can be used in thew future
- Develop functional and sustainable web applications with clean codes
- Troubleshoot and debug applications
- Learn about new technologies
- Stay up to date with current best practices
- Conduct UI tests and optimize performance
- Manage cutting-edge technologies to improve applications
- Collaborate with multidisciplinary team of designers, developers and system administrators
- Follow new and emerging technologies
● Has worked extensively on caching technologies such as Redis, Memcached
● Expert knowledge of computer science, with strong competencies in data structures, algorithms, and software design
● Strong understanding of end-to-end architectures and development frameworks; knowledge across tiers in a multi-tier cloud environment including load balancers, web servers, application containers, data stores, and distributed cache
● Should be strong with Data Structures, Algorithms & OOPs concepts
● Should have a good understanding of database load balancing.
● Can clearly demonstrate an understanding of the Application layer from the OSI model and Presentation layer from the OSI Model.
● Worked on NoSQL databases such as MongoDB
● Designed and developed highly scalable multi-threaded large scale distributed systems
● Well versed with services and microservices architecture
● Usage of containers, virtual machine systems, cloud computing
● Knowledge on Socket would be a big advantage
● Should have a good understanding of how load-balancing works
● Should have an understanding of how CDN works.


