IT and Cybersecurity Network Backend Engineer (Remote)

Experience: 5 TO 8

Location: MUMBAI

Wissen Technology is now hiring for a Java Developer - 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. - 5 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 Us:

At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide.

Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. 

We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. 

Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Whether it’s AI/ML for unstructured data processing, cloud enablement, or data engineering, Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our proprietary Interview Ninja platform ensures we hire the best, building high-performing teams that deliver unmatched results. 

Today, Wissen Technology has a global footprint with 2200+ employees across offices in the US, UK, UAE, India, and Australia. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.

Job Title: Lead Backend Web App Developer

Experience: 10–15 Years

Location: Bengaluru (Hybrid)

Role Overview:

We are seeking an experienced Lead Backend Web App Developer to design and maintain scalable, cloud-based backend systems. This role demands expertise in microservices, AWS, and backend technologies to deliver efficient and high-performing applications.

Key Responsibilities:

• Build and maintain scalable backend systems for cloud-based web applications.
• Develop microservices using AWS (Lambda, SQS, SNS) and databases (MySQL, NoSQL).
• Design and implement REST APIs for seamless communication between systems.
• Create containerized solutions with Docker for efficient deployment.
• Solve real-world problems with enterprise-class product designs.
• Contribute to key decisions on product and technology direction.
• Promote frameworks, standards, and new technologies within the team.

Required Skills:

• Experience: 10+ Years in Backend Development; 3+ Years in large-scale, microservices-based projects.
• Backend Technologies: Proficiency in Python, Node.js, and Java.
• Cloud Expertise: Strong experience with AWS services (Lambda, SQS, SNS).
• Database Skills: Expertise in MySQL and NoSQL databases.
• Microservices Architecture: Deep understanding of distributed systems and scalability.
• DevOps Tools: Hands-on experience with Docker.
• API Development: Proven expertise in designing and consuming REST APIs.
• Soft Skills: Excellent problem-solving and communication abilities.

Why Join Us?

• Work on impactful projects with real-world applications.
• Solve complex problems in a dynamic, fast-paced environment.
• Collaborate with a team of skilled professionals.

Immediate Hiring for L3 Support Backend .Net Developer Position

Job Description:

We are looking for a proactive and detail-oriented L3 Support Engineer to manage and resolve complex technical issues in our Online Travel Booking Platform. You will act as a bridge between customer support, QA, and development teams, with deep knowledge of application internals, APIs, databases, and cloud environments. Ideal candidates should have hands-on experience in .NET or any other backend stack and should be able to handle critical issues, automate support tasks, and contribute to platform stability.

Key Responsibilities:

1. Investigate and resolve complex issues reported by L1/L2 support or customers in production.
2. Perform deep-dive analysis of application logs, exceptions, database queries, and API interactions.
3. Handle incidents related to booking failures, payment mismatches, GDS/supplier API errors, and latency issues.
4. Coordinate with Engineering teams to identify bugs and ensure timely resolution.
5. Monitor system health, performance metrics, and alerts across services (flight, hotel, payment, user management, etc.).
6. Perform root cause analysis (RCA) and document it with action plans and preventive measures.
7. Build or improve internal tools/scripts to aid in faster triaging and resolution.
8. Own deployment verifications and hotfix validations in staging or production environments.
9. Support business continuity during high-traffic periods (e.g., holiday seasons, campaigns).
10. Maintain a knowledge base of recurring issues, resolutions, and platform behavior.

Required Skills :

Join us in our mission to inspire travellers and create unforgettable experiences! If you have the skills, experience, and enthusiasm to excel in this role, we'd love to hear from you.

3–6 years in Application Support / L3 Support / Backend Engineering

1. Strong knowledge of .NET Core / ASP.NET / C#, or any other backend language (Java, Node.js, Python, etc.)
2. Proficiency in debugging distributed systems and analyzing API and application logs.
3. SQL Server, PostgreSQL, or other RDBMS – query optimization, issue tracing.
4. Understanding of RESTful APIs, OAuth, third-party API integration (e.g., GDS, payment gateways).
5. Exposure to Azure / AWS / GCP – especially logging, monitoring, and app services.
6. Experience using tools like Postman, Fiddler, Kibana, Grafana, Azure Monitor, or similar.
7. Knowledge of microservices, CI/CD pipelines, and application containers (Docker, Kubernetes) is a plus.
8. Excellent communication skills to interact with cross-functional teams

Responsibilities:

●     Design and develop websites and web applications from initial concept, site architecture, and user interface to finished deliverables.

●     Write clean, secure, test-driven, easily maintainable and modular codes adhering to the technical standards.

●     Database designing and maintenance.

●     Create and update reusable code libraries to streamline the development cycle.

●     Ensure HTML, CSS, and shared JavaScript is valid and consistent across applications

●     Collaborate and work with front-end/mobile developers on the backend needs of projects.

●     Client communication (verbal/written) as and when required.

Required Skills:

●     Previous working experience as a PHP / Laravel developer. Experience in CMS like Drupal and WordPress will be an added advantage.

●     Excellent knowledge of the Laravel framework and experience building factories/facades/libraries using abstract classes, interfaces, and traits.

●     Good knowledge of RDBMS (MySQL/MS SQL/PostgreSQL), database designing and query optimization techniques.

●     Good core knowledge of HTML5, CSS3, jQuery and Bootstrap framework.

●     Hands-on experience in RESTful API design and development, including implementing oAuth2.0 for authentication and authorization.

●     Strong problem-solving and analytical skills.

●     Excellent communication (verbal/written) skills.

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