Java Developer

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

Experience: 3-10 Years

Qualification- Graduation: Bachelor of Science (B.Sc) / Bachelor of Technology (B.Tech) / Bachelor of Computer Applications (BCA)

Post-Graduation: Master of Science (M.Sc) /Master of Technology (M.Tech) / Master of Computer Applications (MCA)

Roles and Responsibilities:

• Must have experience in Microservice architecture with the ability to collaborate effectively with team members and build positive working relationships.
• Design and build and deploy APIs to meet business requirements.
• High level of commitment to business satisfaction and agility.
• Strong work ethic and a passion for the role, with a positive attitude and a willingness to learn.
• Communicate effectively with the tech lead to thoroughly understand the requirements and highlight any blockers immediately.
• Handle programming and software development, including requirement gathering, bug fixing, testing, documenting, and implementation.
• Work in an agile environment to deliver high-quality solutions.
• Understand and implement Security, Logging, Auditing, Policy Management, and Performance Monitoring.
• Familiarity with relational databases (E.g.: Oracle), non-relational databases (E.g.: MongoDB), MSK Kafka, Docker, Kubernetes, and CICD Technologies (Jenkins, GitHub, Maven)

Skills:

• Proficient in Go programming language with experience in building high-performance, scalable applications
• Experience with Java development a plus
• Familiarity with Git version control systems (e.g., GitHub, GitLab, BitBucket, SVN)
• Solid understanding of RESTful web services APIs
• Experience with CI/CD tools like Jenkins
• Experience with NoSQL databases
• Experience working with PostgreSQL databases

Responsibilities:

• Design, develop, and maintain robust and efficient Go code
• Collaborate with cross-functional teams to design, implement, and deploy new features
• Participate in code reviews and ensure high code quality
• Troubleshoot and debug complex technical problems
• Stay up-to-date with the latest advancements in Go and related technologies

We are looking for an experienced Lead Java Developer to join our team and take a leadership role in driving the design, development, and delivery of highquality software solutions. A Senior Java Lead Developer will be responsible for leading a team of developers, providing technical guidance, and ensuring the successful execution of projects. Should have a strong background in Java development, excellent leadership skills, and a track record of delivering complex software projects on time. System Architect: Should have Architect the system before for a large scale solution Understanding of various java design pattern and use the pattern which is more appropriate Understanding of various micro-service design pattern and use the pattern which is more appropriate Has worked on DDD with CQRS Has designed solution for multi tenant application. Technical skills: Used latest version of java and good understanding of it Skilled in spring boot, spring MVC Basic Skill: 10+ years of experience in development. Good communication skills in English. Testing: Skilled in using Junit Security: Good understanding of application security Understanding of DDOS and best practice for that Good understanding of rate limiting API Good understanding about spring security or any thing better Database: Great understanding of MySQL Experience in extensively using hibernate Debugging: Understanding about Logging Skilled in debugging production issue

Job description for Backend Developer:

Responsibilities
• Hands-on experience in Springboot and good knowledge of MySQL, MongoDB
• Hands-on experience in building RESTful based APIs
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Integration of user-facing elements developed by front-end developers with server-side logic
• Building reusable code and libraries for future use
• Optimization of the application for maximum speed and scalability•
• Implementation of security and data protection

Skills And Qualifications
• Basic understanding of front-end technologies and platforms, such as JavaScript, HTML5, and CSS3
• Understanding accessibility and security compliance (Depending on a specific project)
• User authentication and authorization between multiple systems, servers, and environments
• Integration of multiple data sources and databases into one system
• Management of hosting environment, including database administration and scaling an application to support load changes
• Data migration, transformation, and scripting
• Outputting data in different formats
• Understanding differences between multiple delivery platforms such as mobile vs desktop, and optimizing output to match the specific platform
• Creating database schemas that represent and support business processes
• Implementing automated testing platforms and unit tests
• Proficient knowledge of a back-end programming language (Java 8 and above and Spring Boot)
• Proficient understanding of code versioning tools, such as Git
• Proficient understanding of OWASP security principles
• Understanding of “session management” in a distributed server environment

Required qualification:

*)  Any degree from a reputed university

*) Proven software development experience and Java/J2EE skills development. 

• Hands-on Java Engineers, with experience building consumer-facing or enterprise applications using Java stack – Spring, Hibernate, MySQL
• Strong problem solving and analytical skills
• Strong understanding of Object-Oriented Programming concepts and Design patterns.

Do You Know? (Skills good to have)

• Exposure to building service-oriented distributed systems
• In building systems that process big data in a distributed environment, either in real-time streaming or offline batching.
• In messaging systems like Kafka, RabbitMQ, kinesis, etc.
• In real-time computation tools like Storm / Spark or Hadoop-based tools.
• In Data warehousing technologies like Redshift, BigQuery, etc.

Are you curious, motivated, and forward-thinking? At FIS you’ll have the opportunity to work on some of the most challenging and relevant issues in financial services and technology. Our talented people empower us, and we believe in being part of a team that is open, collaborative, entrepreneurial, passionate and above all fun. 

About the team 

In today’s highly competitive private equity market, firms must not only deliver superior returns, but also respond to more stringent reporting requirements and increasing demands for information – both from within and outside their organization. Throughout the industry there is mounting pressure on organizations to do more, requiring a clear technology strategy that not only addresses the demands of today, but also enables the growth and performance of tomorrow. 

What you will be doing 

This position would be part of CORE product development team to work on:

• Development of new modules & functionality.
• Fixing of the production bugs for existing clients.
• Contribute in team meetings to provide suggestions or raise concerns where necessary
• Participate actively in Agile SCRUM & play the role that SCRUM team demands
• Participate in technology discussions to perform POC’s & help in scaling the application
• Provide technical guidance to other team members.

What you bring: 

Knowledge / Experience

• 3-5 Years of hands-on experience on Java with knowledge of Garbage Collector, JMS, Event Based programming, Collections, Java Streams, Spring Dependency Injection Framework.
• Experience in Angular 2+.
• Experience working with Spring and Hibernate frameworks.
• Working knowledge on application Servers (WildFly)
• Strong experience in REST Web Services.
• Good knowledge in writing DB queries (Oracle, SQL Server)
• Experience working in Unix/Linux environment and proven knowledge of scripting languages
• Exposure to MQ / AMQ messaging system.
• Sound knowledge of Design Patterns

Skills

• Desired to have knowledge of JMX
• Agile – SCRUM or XP or TDD methodology preferred.

Qualifications

• Bachelor’s degree in Computer Science or equivalent

Competencies

• Fluent in English
• Excellent communicator – ability to discuss technical solutions to internal and external parties and adapt depending on the technical or business focus of the discussion
• Attention to detail – track record of authoring high quality documentation
• Organized approach – manage and adapt priorities according to client and internal requirements
• Self-starter but team mindset - work autonomously and as part of a global team

What we offer you

• A multifaceted job with a high degree of responsibility and a broad spectrum of opportunities
• A broad range of professional education and personal development possibilities – FIS is your final career step!
• A competitive salary and benefits
• A variety of career development tools, resources and opportunities

With a 50-year history rooted in the financial services industry, FIS™ is the world's largest global provider dedicated to financial technology solutions.  We champion clients from banking to capital markets, retail to corporate and everything touched by financial services. Headquartered in Jacksonville, Florida, our 53,000 worldwide employees help serve more than 20,000 clients in over 130 countries. Our technology powers billions of transactions annually that move over $9 trillion around the globe.  FIS is a Fortune 500 company and is a member of Standard & Poor’s 500® Index.

FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the https://www.fisglobal.com/-/media/fisglobal/files/policies/privacy/online-privacy-notice/english.pdf?la=en">FIS Online Privacy Notice.