
Job brief
We are looking for a Java Developer with experience in building high-performing, scalable, enterprise-grade applications.
You will be part of a talented software team that works on mission-critical applications. Java developer roles and responsibilities include managing Java/Java EE application development while providing expertise in the full software development lifecycle, from concept and design to testing.
Java developer responsibilities include designing, developing and delivering high-volume, low-latency applications for mission-critical systems.
Responsibilities
- Contribute in all phases of the development lifecycle
- Write well designed, testable, efficient code
- Ensure designs are in compliance with specifications
- Prepare and produce releases of software components
- Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review
Requirements
- BS/MS degree in Computer Science, Engineering or a related subject
- Proven hands-on Software Development experience
- Proven working experience in Java development
- Hands on experience in designing and developing applications using Java EE platforms
- Object Oriented analysis and design using common design patterns.
- Profound insight of Java and JEE internals (Classloading, Memory Management, Transaction management etc)
- Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2, Hibernate)
- Experience in the Spring Framework
- Experience as a Sun Certified Java Developer
- Experience in developing web applications using at least one popular web framework (JSF, Wicket, GWT, Spring MVC)
- Experience with test-driven development

Similar jobs
Work Location - Bangalore (Should be ready to relocate)
Kindly go through the JD & company details if interested please revert with below details & acknowledge with your availability.
Mode of work: Hybrid weekly 2/3 Times Mumbai/ Bangalore location.
While you may already know about Wissen and the company history, here is a quick rundown for you.
INTERVIEW PROCESS:
- Hacker earth assessment
- Round 1
- Round 2
- Final Round
About Wissen Technology:
• The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015.
• Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains. We help clients build world class products.
• Our workforce consists of 550+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.
• Wissen Technology has grown its revenues by 400% in these five years without any external funding or investments.
• Globally present with offices US, India, UK, Australia, Mexico, and Canada.
• We offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
• Wissen Technology has been certified as a Great Place to Work®.
• Wissen Technology has been voted as the Top 20 AI/ML vendor by CIO Insider in 2020.
• Over the years, Wissen Group has successfully delivered $650 million worth of projects for more than 20 of the Fortune 500 companies.
We have served client across sectors like Banking, Telecom, Healthcare, Manufacturing, and Energy. They include likes of Morgan Stanley, MSCI, State Street, Flipkart, Swiggy, Trafigura, GE to name a few.
Website : www.wissen.com
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Job Description:
As per our conversation, please find below the job description for your review.
· Strong written/verbal communication skills
· Minimum 4-14 Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork join pool and other threading concepts)
· Good knowledge of the JVM with an understanding of performance and memory optimization.
· Extensive and expert programming experience in JAVA programming language (strong OO skills preferred).
· Excellent knowledge on collections like, Array List, Vector, LinkedList, HashMap, Hash Table, HashSet is mandate.
· Exercised exemplary development practices including design specification, coding standards, unit testing, and code-reviews.
· Expert level understanding of Object-Oriented Concepts and Data Structures
· Good experience in Database (Sybase, Oracle, or SQL Server) like indexing (clustered, non clustered), hashing, segmenting, data types like clob / blob, views (materialized), replication, constraints, functions, triggers, procedures etc.
· While you may already know about Wissen and the company history, here is a quick rundown for you.
Expectations
- Sound knowledge of Core Java, JSP, Servlets & MVC, Spring
- Good knowledge of Java Script, Ajax
- Good knowledge of My SQL database server
- Experience in working with IDE like Eclipse or Netbeans
- Knowledge of Spring would be an advantage
- Great problem-solving attitude
- Strong OOP & OOAD fundamentals
- Knowledge of Java EE Design pattern
- Technical hands on Spring, Spring Security, Hibernate, JPA, Struts, OO JS, XML, Webservices (Restful, JAX-WS).
- Nice to have knowledge of Liferay, Amazon EC2, Google App Engine, Restful services, jQuery, YUI, EstJS (Sencha), frameworks.
Responsibilities
- Understand the BRS / SRS document
- Coordinate with Team lead/DBA to understand the System design and Database design
- Development and Unit Testing
- Bug fixing and Change Request implementation
Responsibilities:
Develop and maintain high-quality, scalable, and efficient Java codebase for our ad-serving platform.
Collaborate with cross-functional teams including product managers, designers, and other developers to
understand requirements and translate them into technical solutions.
Design and implement new features and functionalities in the ad-serving system, focusing on performance
optimization and reliability.
Troubleshoot and debug complex issues in the ad server environment, providing timely resolutions to ensure
uninterrupted service.
Conduct code reviews, provide constructive feedback, and enforce coding best practices to maintain code quality
and consistency across the platform.
Stay updated with emerging technologies and industry trends in ad serving and digital advertising, and integrate
relevant innovations into our platform.
Work closely with DevOps and infrastructure teams to deploy and maintain the ad-serving platform in a cloud- based environment.
Collaborate with stakeholders to gather requirements, define technical specifications, and estimate development
efforts for new projects and features.
Mentor junior developers, sharing knowledge and best practices to foster a culture of continuous learning and
improvement within the development team.
Participate in on-call rotations and provide support for production issues as needed, ensuring maximum uptime
and reliability of the ad-serving platform.
About Us
Rezo.ai is an AI-Powered Contact Center that enables enterprises to enhance customer experience and boost revenue by automating and analyzing customer agent interactions across multiple channels including voice, email, chat/WhatsApp, and social, at the required scale, whilst training agents with minimal costs
How do we do it
Rezo’s AI-Powered contact center leverages groundbreaking technologies in AI, ML, ASR, NLP, RPA, and predictive intelligence to transform customer experience and reduce costs by automating, and analyzing customer-agent conversations across multiple channels including voice, email, chat/Whatsapp, and social media, whilst coaching them.
What Makes You A Good Fit :
- You are passionate about technology and software development
- You are continuously experimenting and learning more
- You love solving problems and digging into complex problems
- You believe in taking decisions as close to the product and technical expertise as possible.
- You believe in creativity, trying new things and learning from your mistakes.
- You believe in sharing insights and helping one another to build an even better user plan.
Key Skills Required:
- 3-8 years of Experience in Java Product Development.
- Good understanding of MYSQL.
- Practitioner of clean code and SOLID principles
- Exposure to GIT and Maven
- Good verbal and written communication skills
- Understands different major language paradigms (Object Oriented and Functional)
- Understanding and Experience with Multi-Threaded Applications
- Prior Experience in a SAAS Product company is a Plus
- Experience with Managing Team is a plus
Educational Background:
- Bachelor's/Master’s degree in Computer Science Engineering from Tier 1 College is a Plus.
Why You Should Join Rezo.AI
- You will be surrounded by Passionate Team Members with Exposure to Product Building
- You will be learning About various Product Development Cycles
- Big Career Opportunities
- Learning by doing
- The Opportunity of Innovation
- Recognition
- Enhanced Responsibility and Team Management
Cultural fitment
Work at the heart of AI and customer engagement.
If you are fascinated by AI and looking to work with the latest AI technologies, in a fast growing and flexible work environment with immense growth opportunities, come and join us.
Rezo is the place to be if you want to work in an atmosphere where you can do meaningful research, contribute to the platform, and grow fast.
Culture/Values
We believe that allowing employees to pursue their interests and challenge the existing quo only helps to make Rezo a successful workplace. To that end, we are committed to assisting our employees in enhancing the skills that are vital to their professional growth.
FOCUS, INTEGRITY, TEAMWORK, PASSION, INNOVATION
Why Us?
We are a fast-paced start-up with some of the best talents from diverse backgrounds. Working together to solve customer service problems. We believe a diverse workforce is a powerful multiplier of innovation and growth, which is key to providing our clients with the best possible service and our employees with the best possible career. Diversity makes us smarter, more competitive, and more innovative.
Visit our website: https://rezo.ai/">https://rezo.ai/ for more information
Job Description :
- We are a Fintech Company based in Pune, a B2B Trade Digitization platform for SMEs and Corporates to collaborate and work with Financial Institutions to raise short term fundings for payables and receivables financing.
- We are thus well placed to help Corporates and their Supply Chains to meet their GST needs.
Technologies :
- The platform is built using a polygot technology stack
- Platform Backend : JVM
- Web Layer : ReactJS and related ecosystem, HTML, Javascript, CSS, Bootstrap
- API & Business Layer : Kotlin and functional programming
- Client Apps and Customer Integrations: Kotlin, Jersey ReST Framework, home grown optimized HTTP and SQL libraries
- Mobile Apps: Android, iOS
- Database : MySQL - JVM - Hibernate & Exposed as ORM library - Python - SQLAlchemy as ORM library
- Build Tools : Gradle, Shell Scripting, AWS Code Build, Jenkins
- Ops Automation : Ansible, Terraform
- Servers : Ubuntu Linux
- Version Control : GIT
- Test Automation : Python - unittest, pyhamcrest, freshen, nose. JVM - Junit, Kotlin Test
- Cloud Providers : Amazon AWS, Linode
Requirements :
- We are a self organized engineering team with a passion for programming and solving business problems for our customers.
- We are looking to add 2 members in our team having hands on technical experience of 2-6 years.
- We encourage our team to continuously learn new technologies and apply the learnings in the day to day work even if the new technologies are not adpopted.
- We strive to continuously improve our DevOps practices and expertise to form a solid backbone for the product, customer relationships and sales teams which enables them to add new customers every week to our financing network.
As an engineering team member, you will :
- Work collaboratively with product, customer support and DevOps team to build, enhance, maintain, deploy and operate our systems.
- Continuously automate operational processes to improve efficiencies and productivity and enhance customer experience
- Work closely with the architect to continuously refactor the system architecture and design to meet the changing landscape triggered by technology changes and business growth
- Work with the DevOps team to build and maintain tools for deployment, monitoring and operations.
- Ensure that development processes and deliverables always adhere to the mandates laid down for various certifications (PCI and ISO 27001 in particular)
Skills required :
- Pre-requisites : Competent in Java, database, HTML, Javascript, CSS
- Should be passionate about technology and ready to deep dive into programming
- Should have sound expertise of writing testable code and appreciate defect free coding
- Should be willing to handle Ops automation and production support
- Should be able to reason/argue/discuss/suggest solutions and alternatives
- Should be able to decipher the core problem to be solved during discussions with product team and/or customers
- Should have good communication skills and experience working in teams
- Knowledge of Python will be an added advantage
- Experience of working in financial domain will help but not a necessity
- 6-9 years of strong development skills in Java JDK 1.8 or above.
- Experience in developing micro services in Spring Boot or Node.js.
- Experience in security, transaction, Idempotency, log tracing, distributed caching, monitoring and containerization requirements of Micro services
- Experience in developing High Cohesion & Loosely Coupled Micro Services.
- Strong acumen in Data Structures, Algorithms, problem-solving and Logical/Analytical skills.
- Thorough understanding design principles and implementation of different type of Design patterns.
- Sound understanding of concepts like Exceptional handling, Serialization/ Deserialization and Immutability concepts, etc.
- Good fundamental knowledge in Enums, Collections, Annotations, Generics, Autoboxing, etc.
- Experience with Multithreading, Concurrent Package and Concurrent APIs
- Basic understanding of Java Memory Management (JMM) including garbage collections concepts.
- Experience in RDBMS or NO SQL databases and writing SQL queries (Joins, group by, aggregate functions, etc.)
- Hands-on experience with JMS
- Hands-on experience in creating RESTful webservices and consuming webservices
- Hands-on experience with Spring Boot and Spring cloud.
- Hands-on experience with any of the logging frameworks (SLF4J/LogBack/Log4j)
- Experience of writing Junit test cases using Mockito / Powermock frameworks.
- Should have practical experience with Maven/Gradle and knowledge of version control systems like Git/SVN etc.
- Good communication skills and ability to work with global teams to define and deliver on projects.
- Sound understanding/experience in software development process, test-driven development.
Additional Information
- Gender-Neutral Policy
- 18 paid holidays throughout the year for NCR/BLR (22 For Mumbai)
- Generous parental leave and new parent transition program
- Flexible work arrangements
- Employee Assistance Programs to help you in wellness and well being
• Experience working with SQL databases, query optimisation and designing schemas
• High coding standards - understanding of test coverage best practices & test pyramid concept.
• Design, analyze, code, test, and deploy applications to satisfy business requirements for large, complex projects.

