Backend Developer

Wissen Technology is now hiring for a Java Developer - Bangalore 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. - 3-8 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.

Company Overview:

OLOID is a leading provider of physical identity and access technology committed to enabling converged cyber and physical security for the modern workplace. Dedicated to ensuring secure and privacy-forward authentication, OLOID’s objective is to establish a framework that connects and manages workplace security by integrating with HR, IT, and various records systems, unifying cyber and physical identities across the organization.

Job Summary

We are seeking a highly skilled and experienced Senior Node.js Developer to join our development team. The ideal candidate will have a strong background in software engineering with a focus on JavaScript, Node.js, and modern web technologies. You will play a key role in building scalable backend services, integrating APIs, and contributing to full-stack development using frameworks like ReactJS.

Key Responsibilities

·         Design, develop, and maintain robust backend services using Node.js

·         Collaborate with front-end developers to integrate user-facing elements with server-side logic

·         Develop and consume RESTful APIs for various services

·         Write clean, maintainable, and secure code following best practices

·         Troubleshoot, debug, and optimize application performance

·         Implement authentication and authorization mechanisms where needed

·         Contribute to code reviews and technical discussions

·         Maintain and monitor applications on Linux-based environments

Required Qualifications

·         Bachelor’s or Master’s degree in Computer Science or a related field

·         Minimum 8 years of professional programming experience

·         At least 3 years of hands-on experience with Node.js development

·         Strong knowledge of JavaScript, particularly in browser-based frameworks such as ReactJS and Redux

·         Experience with Node.js frameworks such as Express or Hapi (preferred)

·         Solid understanding of asynchronous programming and its patterns

·         Skilled in troubleshooting and debugging complex applications

·         Familiarity with Linux environments

·         Proficiency in working with RESTful APIs and API integration

Senior Developer should have exposure to building logistics products.

Skilled in RESTful & GraphQL APIs, microservices, and database optimization (MySQL, PostgreSQL, MongoDB).

• Experienced in authentication (OAuth, JWT), caching (Redis, Memcached), and real-time applications (WebSockets).

• Strong knowledge of CI/CD pipelines, Docker, Kubernetes, and cloud deployment (AWS, GCP, Azure).

• Passionate about scalability, performance tuning, security best practices, and clean code architecture.

Technical Competencies

• Strong Java/J2EE development experience with demonstrated ability to develop and troubleshoot large mission applications & Software Products
• Experience on exception handling, correct use of data structures, multi-threaded programming, memory management and application tuning
• Excellent exposure in Object Oriented Design skills using Java/J2ee along with:
• Core Java Language (Collections, Concurrency/Multithreading)
• JDBC concepts (connection pooling, statement, result set)
• Web Technologies (Struts/Struts 2, Spring (IOP, MVC, AOP), Hibernate, JSP, Web services)
• Database optimization and profiling
• Core/JEE/Integration Design patterns/UML
• Should have experience in Unit Testing
• Good hands on experience with RDBMS like MySQL/Oracle with ability to write SQL Queries/Stored Procedures/Triggers/Joins/View etc
• Practical application of software product development standards and methodologies including Agile, XP, Kanban, RUP and UML
• Ability to apply design patterns consistently and also accurate when building per design requirements
• Good experience in source control, unit testing, code verification, documentation, automated build, continuous integration, metrics, and code reviews.
• Demonstrated problem solving, analytic and troubleshooting skills.
• Strong written and oral communication skills are required to effectively engage internal stakeholders and their technical representatives.

•Hands on experience with Microsoft technology stack Microsoft .NET WCF, C#, http://asp.net/" target="_blank">ASP.NET, MVC, SQL Server, VSS / TFS, Entity Framework, Web Services, etc.

•Good knowledge of Design Patterns SOLID principles.

•Experience on creating web user interfaces using HTML, CSS, and JavaScript (specifically jQuery).

•Expertise in latest client side technologies like Angular JS/ VUE.JS/ Node.js/ Angular 2.0/ Bootstrap JS etc.

•Experience in SQL Server

•Must have excellent spoken and written English

Must have -

1- Magento 2 working experience for minimum 2 years

2- Work with Magento integration systems, viz CMS/CRM/Payment gatway/shipping etc

3- Analyse, code, debug, test, document & deploy application

4- Experiance building REST API

5- Knowledge of GTM and FB integration

Good to have-

1- Magento 2 certification

2- Experience in fronted tech like HTML5, CSS3, JQuery and ReactJS

3- Experience of working on PWA apps