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Technical Expertise:

• Strong proficiency in OOP concepts, C#, .NET Core, Entity Framework, React, SQL Server, PostgreSQL, Dapper, ADO.NET, LINQ, and Web API Development.
• Experience with event-driven architecture and messaging systems such as Kafka or Rabbit MQ.
• Excellent debugging, troubleshooting, and performance optimization skills.
• Expertise in database development including tables, views, stored procedures, triggers, and functions.
• Hands-on experience with unit testing frameworks (XUnit).
• Proficiency in JWT services, Git, and third-party API integration.
• Experience in code review and mentoring junior developers.
• Preferred Qualification:
• Bachelor’s Degree in Business, Marketing, Communications, or related field.

🧠 Job Description: Senior Java Developer (8+ Years Experience)

Location: Mumbai, India

Employment Type: Full-time, Hybrid mode of working

Company: Wissen Technology

Website: www.wissen.com

🚀 About Wissen Technology

Wissen Technology is a specialized technology consulting firm delivering cutting-edge solutions to global leaders in Banking & Finance, Telecom, and Healthcare. Established in 2015 and part of the Wissen Group (founded in 2000), Wissen has scaled rapidly with impressive impact and recognition.

• 🌍 Offices in US, UK, India, Australia, Mexico, and Canada
• 👥 1700+ Wissen Technology professionals; part of a 4500-strong Wissen Group
• 🏆 Great Place to Work® Certified
• 🧠 Featured as a Top 20 AI/ML Vendor (CIO Insider, 2020)
• 📈 Achieved 400% revenue growth in 5 years (with zero external funding)
• 💼 Delivered $1B+ worth of projects to 50+ Fortune 500 companies

Learn more about our work and thought leadership:

📄 Articles by Wissen | 💼 LinkedIn

About the Role

We are seeking an experienced Senior Java Developer with 8+ years of hands-on expertise in building scalable, high-performance applications. The ideal candidate will have strong fundamentals in Java, OOPS, Multithreading, Spring concepts, and SQL, and will play a key role in designing, developing, and optimizing enterprise-grade solutions.

Key Responsibilities

• Design, develop, and maintain complex applications using Core Java and Spring frameworks
• Apply advanced Object-Oriented Programming (OOPS) principles to deliver clean, modular, and reusable code
• Implement and optimize multithreaded applications for high-performance systems
• Work with SQL databases for efficient data modeling, query optimization, and integration
• Collaborate with cross-functional teams to gather requirements and translate them into technical solutions
• Conduct code reviews, troubleshoot issues, and ensure adherence to best practices
• Mentor junior developers and contribute to technical knowledge sharing within the team
• Ensure application scalability, performance tuning, and security compliance

Required Skills & Qualifications

• Bachelor’s/Master’s degree in Computer Science, Engineering, or related field
• 8+ years of professional experience in Java development
• Strong expertise in Core Java, OOPS, and Multithreading
• Hands-on experience with Spring concepts (Spring Core, Spring MVC, Spring Boot preferred)
• Proficiency in SQL and database design (MySQL, Oracle, PostgreSQL, etc.)
• Solid understanding of software development life cycle (SDLC) and Agile methodologies
• Strong analytical, problem-solving, and communication skills

🌟 Why Wissen?

Join a company that combines start-up agility with enterprise stability. Work alongside some of the brightest minds from institutions like MIT, Wharton, IITs, IIMs, and NITs. Be part of mission-critical projects for Fortune 500 giants, and grow in a culture that invests in your future.

Salary: upto 10LPA

Experience: 4+ years

Mandatory Skill- Winforms

No relocation cases

Key Responsibilities:

 Design, develop, and maintain WinForms applications.

 Knowledge of .NET languages including C#, & Winforms is Mandatory.

 Collaborate with cross-functional teams to define, design, and implement new

features.

 Write clean, scalable, and efficient code using C# and ASP.NET.

 Develop and maintain SQL Server databases, including writing complex

queries and stored procedures.

 Troubleshoot, debug, and optimize existing applications.

 Participate in code reviews and contribute to team knowledge sharing.

 Ensure application security, performance, and reliability.

• Actively work on server-side development on the .NET framework
• Browser / client-side development on JavaScript (or its libraries such as JQuery). Work with data structures such as XML and JSON
• Translate application storyboards and use cases into functional applications
• Design, build, and maintain efficient, reusable, and reliable code
• Integrate data storage solutions like Postgres SQL and Redis
• Ensure the best possible performance, quality and responsiveness of applications
• Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues
• Help maintain code quality, organization, and automatization

Responsibilities:

- Design, develop, and implement robust and efficient backend services using microservices architecture principles.

-  Write clean, maintainable, and well-documented code using C# and the .NET framework.

-  Develop and implement data access layers using Entity Framework.

-  Utilize Azure DevOps for version control, continuous integration, and continuous delivery (CI/CD) pipelines.

-  Design and manage databases on Azure SQL.

-  Perform code reviews and participate in pair programming to ensure code quality.

-  Troubleshoot and debug complex backend issues.

-  Optimize backend performance and scalability to ensure a smooth user experience.

-  Stay up-to-date with the latest advancements in backend technologies and cloud platforms.

-  Collaborate effectively with frontend developers, product managers, and other stakeholders.

-  Clearly communicate technical concepts to both technical and non-technical audiences.

Qualifications:

-  Strong understanding of microservices architecture principles and best practices.

-  In-depth knowledge of C# programming language and the .NET framework (ASP.NET MVC/Core, Web API).

-  Experience working with Entity Framework for data access.

-  Proficiency with Azure DevOps for CI/CD pipelines and version control (Git).

-  Experience with Azure SQL for database design and management.

-  Experience with unit testing and integration testing methodologies.

-  Excellent problem-solving and analytical skills.

-   Ability to work independently and as part of a team.

-   Strong written and verbal communication skills.

-   A passion for building high-quality, scalable, and secure software applications.

Key Responsibilities:

• SDLC development of product features, enhancements, UAT/production issues.
• Work with development team members for development of product features.
• Client-side and server-side development.
• Develop and manage well-functioning databases and application.
• Write/ design product APIs and write unit test cases.
• Follow standard agile scrum practices for software development.
• Peer review, pull requests, code refactoring and managing source code per standards and ensure quality. 

Required Experience & Skills:

• 5+ years of software development experience using Microsoft .Net technology stack.
• Strong experience in .Net, .Net Core, C#, Entity Framework, SQL server, JavaScript, jQuery, etc.
• Experience in using unit test framework e.g., xUnit, Moq.
• Experience in Web API development.
• Experience in Agile / SCRUM development process.
• Good to have experience in Domain driven design development and Microservice architecture.
• Excellent communication and teamwork skills
• Good to have knowledge and experience in ABP.IO framework, Angular 8+, PostgreSQL and AWS cloud service and CI/CD process.

• Analyze and document requirements for enhancements to systems and / or business processes.
• Write clean, testable code using .NET programming languages
• Develop technical specifications and architecture
• Test and debug various .NET applications
• Review and refactor code
• Deploy fully functional applications
• Upgrade existing programs
• Document development and operational procedures
• Support junior developers’ work

Technical Competencies

• Strong understanding of object oriented programming concepts, design patterns and SOLID principles
• Must have hands on experience with C#, ASP.NET, MVC, Windows Services, .NET Entity Framework, SQL Server/T-SQL, IIS and related technologies
• Expertise in REST APIs and WCF
• Strong knowledge of modern techniques such as Responsive Web Design, LINQ, Dependency Injection and Design Patterns
• Strong Skills and experience with web client technologies inclusive of HTML5, CSS3, JavaScript, AJAX, JSON and JQuery
• Knowledge of various industry standard development practices (Agile methodology, OOD, TDD, BDD)
• Proficient with tools to enable SDLC (TFS, Visual Studio, etc.)

Behavioral Competencies

• A go getter attitude with the ability & desire to work in a fast-paced challenging environment
• An innovator mind-set who strives to make things better
• Ability to work independently with the knowledge as well as capability to quickly grasp and make an immediate impact
• Good written & verbal communication skills