JAVA Developer

🧠 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.

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

Required Skills:

• 3+ year of experience in Development in JAVA technology.
• Strong Java Basics
• SpringBoot or Spring MVC
• Hands on experience on 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 of AI/ML algorithms is a plus.

Enterprise Minds, with core focus on engineering products, automation and intelligence, partners customers on the trajectory towards increasing outcomes, relevance and growth.

Harnessing the power of Data and the forces that define AI, Machine Learning and Data Science, we believe in institutionalizing go-to-market models and not just explore possibilities.

We believe in a customer-centric ethic without and people-centric paradigm within. With a strong sense of community, ownership, and collaboration our people work in a spirit of co-creation, co-innovation and co-development to engineer next-generation software products with the help of accelerators.

Through Communities we connect and attract talent that shares skills and expertise. Through Innovation Labs and global design studios we deliver creative solutions.
We create vertical isolated pods which has narrow but deep focus. We also create horizontal pods to collaborate and deliver sustainable outcomes.

We follow Agile methodologies to fail fast and deliver scalable and modular solutions. We constantly self-asses and realign to work with each customer in the most impactful manner.

Pre-requisites for the Role

1.Job ID-EMJB0120PS

1. Primary skill:

• Java version 8.0
• Apache Kafka
• Java version 8.0
• SQL
• Good communication skills, proactive and responsible way of working

1. Secondary skill:

 (Good to have)

• Wicket/JSF/Struts/Servlet/JSP experience on any of the web development technology
• SQL Server / Oracle
• JPA/JCA
• Spring (Boot, Cloud, additional feature)
• Micro Services
• Container Orchestration (e.g. Docker)
• Container Management System (e.g. Kubernetes)
• Continuous Integration and Continuous Delivery (e.g. Jenkins)

1. Years of Experience: 5-8 Years
2. Location:(Hybrid Model)
3. Position-2
4. Budget- Max 30 LPA
5. NP- Immediate

Primary Role & Responsibility

As a senior software engineer, your daily work involves technically challenging applications and projects where your code makes a direct contribution to the further development and upkeep of our VI solutions and to its application in projects.

As a software engineer, we expect much more from you than just the ability to design and develop good software. We find it important that you possess an inherent drive to get the best out of yourself every day, that you are inquisitive and that you are not intimidated by situations which require you to branch off from the beaten track. You work together with colleagues in a SCRUM team. In addition, you have regular contact with other software teams, software architects, testers and end users. Good communication skills are therefore extremely important, as well as the ability to think pro-actively and suggest possible improvements. This gives you every opportunity to contribute your personal input and grow and develop within the department.

The often-complex functionality of the software includes business logic, controls for logistical transport, communication with external computer systems, reporting, data analysis and simulation. This functionality is spread across the various components of the VIBES suite. You design, program and test the software based on a design concept and a set of requirements. In some cases, you must personally formulate these requirements together with the (end) users and / or internal stakeholders. Learn more about the VI products.

Desired Profile & Experience: Knowledge of Kafka and experience with Java

Job Description:

• Educational Qualification:

• E., B. Tech, BSc. Tech, MCA, or an equivalent degree

• Essential:

• Strong Knowledge of Core Java & Advanced Java.
• In-depth knowledge of Spring MVC framework, Spring Security framework, Tag libraries, Hibernate framework, Spring Boot, Micro services, etc.
• Should have the knowledge and experience in REST API, JSON, XML.
• Knowledge of frontend technology - Angular/React, JSP, HTML, CSS.
• Should have thorough Knowledge of any Two of the RDBMS, i.e., Oracle, MSSQL, PostgreSQL, IBM DB2, etc.
• Should have understanding of NoSQL Databases such as MongoDB.
• Databases Designing and implementing in accordance to end-users information needs and views.
• Hands on database triggers, function and procedures.
• Strong knowledge of Web based applications.
• Should have know-how of 3-tier architecture.
• Should have understanding of HTTP/s (SSL).
• Should have Hands on experience of Microsoft OS, Linux OS, etc.
• Should have used SVN, Bug tracking and Test case repository tools.
• Knowledge / exposure to Secured Coding Practices keeping the requirements to avoid OWASP top 10 vulnerabilities in Application.  Ability to understand and fix such vulnerabilities.  This would be an added advantage.
• Knowledge of Software Effort estimation
• Inclination towards Documentation (Very Important)
• Should have at least 2 years’ experience as a full stack developer.

Minimum 2 years of experience in the software development, including Project Management and

interactions with customers

• Solid understanding of the full software development life cycle

• Working Experience of

a) Ubuntu 18.04.4 LTS

b) Java 1.8

c) Tomcat 9

d) Spring boot framework 2.2.2. RELEASE

e) Spring OAuth2 2.4.0. RELEASE

f) Spring Security JWT 1.1.0.RELEASE

g) Spring Log4j2

h) Hibernate 3.13.3

i) Nginx 1.14.0

j) Hikari Connection Pool

k) Mariaj Connector

l) Google Recaptcha

m) Redis client 3.3.0

Qualification

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

Responsibilities

• You will design and develop large scale distributed services
• You will analyse and improve the efficiency, scalability, stability, and security of the platform as a whole.
• You will act as the primary owner of one or more components while driving innovation in your area of ownership
• You will proactively research & evaluate new tools, technologies, and techniques to improve the value of the system.
• You will work with engineering leadership in solving and architecting solutions for challenging or complex development issues.
• You will work independently and handle dependencies with very minimal oversight
• You will take initiatives in developing and maintaining integrations of best practices within the back-end.
• You will help identify systemic issues, performance bottlenecks and work on design/architect improvements.

Requirements

• You have 1 - 9 years of experience in software development.
• You have designed and scaled up the system.
• You have a strong understanding of Data Structures and Algorithms.
• You are an incessant problem solver and tougher the problem gets, more fun you have.
• You have strong command in any one or more of the following languages: Python and Django
• You understand the business impact of your decisions.

Good To Have

• You have prior experience in fintech companies

Traits We Are Looking For

• Experience in a specific tech stack doesn't matter for us.
• The general engineering mindset and aptitude is what matters more.
• Technically strong and curious.
• Should have a hacker mindset and should love exploring new technologies.

Desired Skills and Experience

Java, Python, Data Structures, Algorithms