
Must have very good experience in Java development.
Must have a very good understanding of data structure & algorithms.
Must be very good at coding & problem solving skills.
Must be very good in multithreading, Collections, OOPS concepts.
Good to have experience in Java 8.

About Wissen Technology
About
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.
With offices in 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.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
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.
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Designation – Nodejs Developer
Experience – Min 3+ Yrs
Location: Ahmedabad ( WFO)
We are seeking a highly skilled Senior Node.js Developer with expertise in SQL and MongoDB to join our dynamic team.
As a key member of our development team, you will be responsible for managing the interchange of data between the server and users, as well as developing server-side logic. Your primary focus will be on the development of all server-side logic, ensuring high performance and responsiveness to requests from the front-end. Additionally, your experience with both SQL and NoSQL databases will be crucial in defining and maintaining our data storage solutions.
Responsibilities:
Develop and maintain server-side applications using Node.js.
Design and implement RESTful APIs for seamless integration with front-end applications.
Collaborate with front-end developers to integrate user-facing elements with server-side logic.
Optimize applications for maximum speed and scalability.
Implement security and data protection measures.
Design and maintain database schemas for both SQL (e.g., MySQL, PostgreSQL) and NoSQL (e.g., MongoDB) databases.
Manage and mentor junior developers, providing technical guidance and support.
Stay updated with emerging technologies and industry best practices.
Requirements:
Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent work experience.
Minimum 4 years of experience in Node.js development.
Proficiency in JavaScript/TypeScript and frameworks such as Express.js.
Strong understanding of asynchronous programming and event-driven architecture.
Experience with SQL databases (e.g., MySQL, PostgreSQL) and proficiency in writing complex SQL queries.
Experience with NoSQL databases (e.g., MongoDB) and familiarity with their query languages.
Familiarity with ORM libraries (e.g., Sequelize, Mongoose) for database interaction.
Knowledge of version control systems (e.g., Git).
Understanding of CI/CD pipelines and deployment processes.
Excellent communication and teamwork skills.
Ability to lead and mentor a team of developers.
JOB DESCRIPTION:
Location: Pune, Mumbai, Bangalore
Mode of Work : 3 days from Office
* Python : Strong expertise in data workflows and automation
* Pandas: For detailed data analysis and validation
* SQL: Querying and performing operations on Delta tables
* AWS Cloud: Compute and storage services
* OOPS concepts
Mandatory skills
Hands on Python Programming.5+ years of Data Engineering experience: Skills sets: Python, SQL (Snowflake), S3.
Good to have
AWS familiarity would help
Job description
🔧 Key Responsibilities:
- Design and implement robust backend services using Node.js.
- Develop and maintain RESTful APIs to support front-end applications and third-party integrations
- Manage and optimize SQL/NoSQL databases (e.g., PostgreSQL, MongoDB, Snowflake)
- Collaborate with front-end developers to ensure seamless integration and data flow
- Implement caching, logging, and monitoring strategies for performance and reliability
- Ensure application security, scalability, and maintainability
- Participate in code reviews, architecture discussions, and agile ceremonies
✅ Required Skills:
- Proficiency in backend programming languages (Node.js, Java, .NET Core)
- Experience with API development and tools like Postman, Swagger
- Strong understanding of database design and query optimization
- Familiarity with microservices architecture and containerization (Docker, Kubernetes)
- Knowledge of cloud platforms (Azure, AWS) and CI/CD pipelines.
Profile: AWS Data Engineer
Mode- Hybrid
Experience- 5+7 years
Locations - Bengaluru, Pune, Chennai, Mumbai, Gurugram
Roles and Responsibilities
- Design and maintain ETL pipelines using AWS Glue and Python/PySpark
- Optimize SQL queries for Redshift and Athena
- Develop Lambda functions for serverless data processing
- Configure AWS DMS for database migration and replication
- Implement infrastructure as code with CloudFormation
- Build optimized data models for performance
- Manage RDS databases and AWS service integrations
- Troubleshoot and improve data processing efficiency
- Gather requirements from business stakeholders
- Implement data quality checks and validation
- Document data pipelines and architecture
- Monitor workflows and implement alerting
- Keep current with AWS services and best practices
Required Technical Expertise:
- Python/PySpark for data processing
- AWS Glue for ETL operations
- Redshift and Athena for data querying
- AWS Lambda and serverless architecture
- AWS DMS and RDS management
- CloudFormation for infrastructure
- SQL optimization and performance tuning
Technical Experience :
- Net development work experience.
- Proficiency in NET Development with Asp.net and MVC.
- Strong object-oriented programming OOPS design skills, SOLID principles and proficiency in software design patterns.
- Experience in database MS SQL Server.
- Experience with version control systems GitHub and Bitbucket.
Professional Attributes :
1. Should have good communication Skills.
2. Should be a good team player.
3. Should be able to work independently and under pressure.
4. Should have good logical and analytical thinking.
Senior Software Engineer (Java)
We are looking for a Senior Software Engineer - Java
If you're a creative problem solver who is eager to develop amazing products and hungry for a new adventure, a word class workplace is waiting for you in the heart of Kolkata.
An exhaustive list of expectations :
✓ Design and implement cutting-edge applications
✓ Participate in code reviews and application debugging and diagnosis.
✓ Practice modern software development methodologies such as continuous delivery, and scrum.
✓ Collaborate with product managers and engineers to build scalable systems enabling innovative ordering experiences.
Requirements -
✓ Knowledge and 5+ years of experience in developing Java applications
✓ A completed technical degree in Computer Science or any related fields.
✓ Profound knowledge and working experience with Java Frameworks (Springboot) and SQL databases.
✓ Solid experience in the design and implementation of Restful APIs and design patterns.
✓ Strong knowledge in Core Java, REST , Spring Framework, Spring Boot Microservice , JPA (e.g. Hibernate, OpenJPA, etc.) , Docker, Jenkins, ELK Stack
✓ Experience working with NoSQL Technologies and interest in Elasticsearch, and Microservices architectures.
✓ Curiosity, out of box problem-solving abilities, and an eye for detail.
✓ Passion for clean code
What really makes us interested in you - You are self-motivated. You think like an entrepreneur, constantly innovating and driving positive change, but more importantly, you consistently deliver stupendous results.
Number of position – 3
Job Location – kolkata, Sector 5
Qualification & Experience
- A Bachelor’s / Master’s degree in Computer Science (or equivalent experience)
- M-Tech or advanced degree a plus Hackathon participation and accolades are a plus.
- Total Exp- 6-8 years with minimum 6+ years of professional software development experience on Java / J2EE
- Full SDLC experience (Requirements Gathering, Architecture, System Design, Development, QA, etc…)
- Experience with Spring Boot/Spring Framework ( IOP/DI, REST, Security)
- Experience with SOAP / REST web services Knowledge of SQL
- Knowledge of No SQL concepts.
- Work experience on Apache SOLR , REDIS / Relevant Cache Manager , Lucene , Elastic Search .
- Mongo DB & Postgres DB / RDBMS is desirable
- Understanding concepts of CDN & Content Management
- Must have worked on any one messaging solutions like Kafka or RabbitMQ
- Bonus Points for Micro Service Design and Development experience
- Used Agile methodology / Scrum
- Experience leading or working with cross geography teams
- Bonus Points for experience working on Unix, Shell Scripting & Build Systems
- Experience in performance optimization is an added advantage
Responsibilities:
-You will be actively involved during the entire technology development lifecycle.-
Responsibilities will include all aspects from design, coding, testing, customer feedback cycle changes and support. Primary role in software development with object-oriented Java.
-The customized solutions that you will be architecting and developing will also require knowledge and experience with Spring / Spring Boot / Hibernate / ORM Concepts, SOAP / REST, and SQL / No SQL.
-Ability to learn new technologies quickly and willingness to read and digest large existing source code and take Ownership on complex component or subsystem to drive improvements and Re- Architecture. --Work with a team of amazing developers and designers involved in the -design and development of global platforms.
Invent and prototype new features, build, test and ship them to customers as SaaS, Cloud Based or hosted product platforms
Drive the implementation of new technologies which improve our ability to build great customers products. Participate in a fun, open learning environment with great benefits and smart talented folks that represent among the best globally.
Java Developer
Requirements:
1. Good knowledge and hands on experience in Java development with.
2. Good knowledge of Java and J2EE internals (Multi threading, Memory Management, Transaction
management etc.)
3. Good knowledge of Relational Databases, SQL and ORM technologies (JPA2, Hibernate)
4. Working experience in developing web applications using Spring MVC or Spring Boot.
5. Analytical mindset and good problem-solving skills is a must.
6. Able to write well-structured, testable, efficient code.
Job Description
We are looking for a passionate and motivated java backend developer to engineer low latency
applications for mission-critical systems, delivering high-availability and performance. You will be
contributing in all phases of the development lifecycle, and will be working closely with a cross-functional
team to create highly scalable products.
Salary: As per Industry Standards
Industry: IT-Software / Software Services
Functional Area: IT Software - eCommerce, Internet Technologies
Role Category:
Role: Backend Engineer
A backend developer works alongside front-end developers, full stack developers, programmers or UX specialists to create comprehensive digital solutions for business needs. They make sure the website is scalable and that it can still function when hit by large loads—be that traffic or demanding scripts. They are also tasked with
maintaining and testing existing back-end elements to ensure they’re as fast and efficient as possible. Data storage also comes under their remit, which requires them to have a good knowledge of data security and compliance.
Duties and responsibilities:
• Analyses, designs, develops, and codes REST API using NodeJS more programming languages, Web and Rich Internet Applications.
• Supports applications with an understanding of system integration, test planning, scripting, and troubleshooting.
• Assesses the health and performance of software applications and databases.
• Establishes, participates, and maintains relationships with business units, customers and subject matter experts to remain apprised of direction, project status, architectural and technology trends, risks, and functional/integration issues.
• Defines specifications and develop programs, modifies existing programs, prepares test data, and prepares functional specifications.
• Analyses program and application performance using various programming languages, tools and techniques.
• Manage staff of 2-3 & manage microservices of software most effectively and efficiently.
• Reviews project proposals evaluate alternatives, provides estimates and makes recommendations.
• Designs and defines specifications for systems.
• Identifies potential process improvement areas and suggests options and recommends approaches
System Design Concepts:
- Scaling
- API Gateway
- Microservices
- Message Queue
Qualifications:
Graduation - B. Com + IT Certification/ B.Sc. - IT / B.Sc. Comp Sc./ B.Sc. IT/ BE-IT/ BE-Comps
Technical Skills:
Oracle, SQL, Java, Node JS, REST API Debugging.
Soft Skills:
Client Management; Good interpersonal skills; Good Communication









