Java Developer Engineer

Experience: 5 TO 8

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 TO 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 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.

Key Responsibilities :

- Design, develop, and maintain Java-based applications using Java SE/EE.

- Implement, test, and deploy microservices and RESTful APIs using Spring Boot and related technologies.

- Develop efficient and scalable solutions by writing clean, maintainable, and optimized code.

- Collaborate with cross-functional teams to understand business requirements and provide technical solutions.

- Write and execute unit tests using JUnit to ensure code quality and functionality.

- Perform code reviews to ensure adherence to best practices and coding standards.

- Troubleshoot, debug, and optimize code for performance and scalability.

- Stay up to date with the latest Java technologies and development best practices.

Required Skills and Qualifications :

- Bachelor's degree in Computer Science, Engineering, or a related field.

- Years of experience in Java development (Java SE/EE, Spring, Hibernate).

- Strong experience with JUnit and test-driven development (TDD).

- Proficient in building microservices using Spring Boot and RESTful APIs.

- Experience with version control tools like Git.

- Familiarity with build tools such as Maven or Gradle.

- Strong understanding of object-oriented programming (OOP) principles.

- Familiarity with databases (SQL/NoSQL) and ORM frameworks (e.g., Hibernate).

- Experience with cloud platforms like AWS (preferably).

- Strong problem-solving skills and the ability to work in a collaborative environment.

Preferred Skills :

- Experience with continuous integration/continuous deployment (CI/CD) tools.

- Knowledge of containerization technologies like Docker.

- Familiarity with Agile methodologies and Scrum framework.

- Knowledge of front-end technologies (HTML, CSS, JavaScript) is a plus.

Product Based Client:

A multinational technology and e-commerce company based in the United States is widely recognized as one of the world's largest online retailers. In addition to e-commerce, it is a major player in cloud computing through its cloud services division and has expanded into areas such as streaming services, artificial intelligence, and smart devices.

Essential Job Functions:

Top 3 responsibilities

• Taking for operational work.

• Monitoring data pipelines.

• Addressing/Triaging customer tickets

Qualifications:

Exp: 1+ Years

• Skillset:Core Java, Data Structures, Al

Role: Backend Developer-SDE2

• 3-5 years of exp into

Responsibilities:

• Work on the development backend systems for our first product.
• Build reliable, secure and performant backend systems.
• Drive test coverage and continuous delivery automation within the team.

Requirements:

• 3-4 years of software development experience.
• Strong computer science fundamentals.
• Good knowledge of Java ecosystem.
• Can write code that is readable, maintainable and performant.
• Good understanding of relational databases, transactions, entity-relationship modeling.
• Comfortable writing multi-threaded programs.

• 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 caches.

• Minimum 6 years of experience with deep technical knowledge and hands on skills in Java.

• Has worked extensively on caching technologies such as Redis, memcache.

• Should be strong with Data Strcutures, Algorithms & OOPs concepts.

• Worked on NoSQL databases such as MongoDb.

• Designed and developed highly scalable multi-threaded large scale distributed systems.

• Well versed with services and micro-services architecture.

• • Usage of containers, virtual machine systems, cloud computing.

   

• Strong experience in Java Development
• Deep expertise and hands-on experience with Web Applications
• Expertise in Java, Spring Boot is an added advantage.
• Experience in Microservices
• Hands-on design experience with Web Services (REST, SOAP, etc ..).
• Strong grasp of security principles.

Nice to Have

• Spring Zuul
• Kafka
• cryptography and certificates

Abilities:

• Developer with  strong ability to develop web applications using Java
• Should be able to Code, design, and implement
• Maintain code integrity and organization