At least 4 years' experience as a Node.js developer.
Experience in Microservices
Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
Mandatory experience in Postgres and MySql.
Knowledge of front-end technologies such as HTML5 and CSS3.
Superb interpersonal, communication, and collaboration skills.
Exceptional analytical and problem-solving aptitude.

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Java Developer – Job Description Wissen Technology is now hiring for a Java Developer - Bangalore/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. - 3 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 Wissen Technology: Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in-class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals. Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’. Our team consists of 1200+ 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 offers 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. We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.
Job Summary:
We are seeking a seasoned Java Backend Developer Lead to drive the design, development, and deployment of robust backend systems. This role requires hands-on coding expertise, architectural vision, and the ability to mentor and lead a team of developers in delivering high-performance, scalable applications.
Key Responsibilities:
- Lead the backend development team in designing and implementing microservices-based architectures using Java (preferably Java 11+).
- Architect and develop RESTful APIs and backend services using Spring Boot, Hibernate, and related frameworks.
- Collaborate with DevOps teams to streamline CI/CD pipelines using Jenkins, Docker, and Kubernetes.
- Ensure code quality through code reviews, unit testing (JUnit/TestNG), and integration testing.
- Optimize application performance and scalability through profiling and tuning.
- Guide team members in adopting best practices in software engineering, including Agile methodologies.
- Work closely with product managers, frontend developers, and QA teams to deliver end-to-end solutions.
- Maintain documentation and ensure knowledge sharing across the team.
Required Skills:
- Strong proficiency in Java, Spring Boot, and REST API development.
- Experience with relational databases (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis).
- Familiarity with messaging systems like Kafka or RabbitMQ.
- Solid understanding of cloud platforms (AWS, Azure, or GCP).
- Experience with containerization and orchestration tools (Docker, Kubernetes).
- Excellent problem-solving, debugging, and analytical skills.
- Strong leadership and communication abilities.
Preferred Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
- 7+ years of backend development experience, with at least 2 years in a lead role.
- Exposure to security best practices and performance testing tools like JMeter.
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
Responsibilities:
Design and develop server-side web applications using Node.js
Write high-quality, testable, and scalable code
Collaborate with cross-functional teams to identify and prioritize features
Implement and maintain software design patterns and architecture
Troubleshoot and debug applications
Optimize application performance and scalability
Participate in code reviews and provide constructive feedback to improve code quality
Stay up-to-date with the latest developments in web technologies and frameworks
Requirements:
2-4 years of experience in developing server-side web applications using Node.js
Strong proficiency in JavaScript, with a good understanding of its ecosystem
Experience with popular Node.js frameworks such as Express or Hapi
Familiarity with database technologies such as MongoDB, MySQL, or PostgreSQL
Knowledge of web security best practices and techniques
Experience with Git and other version control systems
Ability to work in a fast-paced, agile environment
Good communication and teamwork skills
If you meet these qualifications and are passionate about developing high-quality, scalable web applications, we encourage you to apply for this position.
Requirements:
- Have Strong knowledge of cloud technologies like (AWS/GCP/Azure).
- Strong in any Backend language like Java-Springboot(preferred), Python, ROR, NodeJs, GO etc.
- Have a working experience with any frontend technology.
- Strong system design experience in cloud-native products.
- Understands and knows how to work with GIT.
- Able to develop or implement HLD into LLD and vice versa.
- Strong knowledge of SQL/NoSQL database.
- Strong on DSA.
- Has previously built and delivered end-to-end products preferably with any FinTech startup.
- Someone very motivated and loves taking ownership of building an end-to-end application
Perks:
> Fully-remote
> Flexible work hours
> You could be our first Director/VP of technology
> Founding Team role
> ESOPs

We are looking for a Senior Back-end Node.js Developer who is passionate about design, architecture, and programming. Responsibilities include implementing business logic and developing APIs and services. Your primary focus will be development of all server-side logic, definition, and maintenance of databases, and ensuring high performance and responsiveness to requests from the front-end. If you are also passionate about Node.js and software design/architecture, we’d like to meet you.
Requirements:
- 2+ years working in back-end web development with Node.js
- 4+ years working with Javascript
- Experience with server-side templating languages
- Experience with Express.js
- Experience consuming and building robust RESTful APIs
- Experience with Relational Databases like MongoDB, MySQL
- Solid understanding and extensive experience with version control tools like Git
- Exceptional problem solving and ability to work independently
- Exceptional learning skills
- Fluency in both oral and written English
- Understanding of Agile methodologies
We are looking for strong Backend developers to join our growing Team and help build Software applications and Tools that help streamline enterprise processes and build efficiency.
Roles & Responsibilities:
-Well versed with Javascript / Typescript, Node.js, Node.js frameworks like Nest.js, express.js, Postgres DB (relational databases), Redis / Memcache, Queues.
- Should be able to deploy code and manage CI/CD pipeline on Microsoft Azure / AWS, GitHub skills.
- Plus points if s/he is versed with JS Unit testing frameworks, Python.
- Work with the development team and product manager to ideate software solutions and document cards on PM tools.
- Design client-side and server-side architecture and explain it well to technical and non-technical audiences.
- Build client and server code that is fast, testable, and high quality.
- Should be testing code thoroughly, we strongly discourage throwing code over the wall.
- Excellent coding, problem-solving, and debugging skills
- You strive to create highly intuitive and responsive products.
- You’re a fast learner, can contribute from day one, and can bring good thoughtful opinions to the table.
- You have an excellent command of written and spoken English and communicate about what you're doing with your coworkers.

- Web development using PHP & experience in coding on MVC architecture of Laravel
- REST API knowledge is a must with oAuth security
- Understanding of mobile apps with REST API integration, firebase & google analytics is important
- Need to have knowledge of querying MySQL & NoSQL databases like MongoDB
- Experience with Node Js for our notification system
- Understanding of cloud services like Google cloud & AWS ec2 instance is a bonus for the profile

- Relevant industry experience in developing performant and scalable backend systems using Node.js.
- Solid understanding of Core Computer Science, Systems Design and Data Structures & Algorithms.
- Knowledge and experience in the best practices of design and architecture.
- Experience in developing extensible and scalable solutions.
- Experience in implementing automatic assessments associated with the front-end layer, both integration and unit.
- A love for beautiful, clean and maintainable code.


