Java Developer

Job Title : Senior Backend Developer (Node.js + AWS + MongoDB)

Experience : 4+ Years

Location : Andheri, Mumbai (Work From Office)

About the Role :

We are looking for a highly skilled Senior Backend Developer with strong expertise in Node.js (NestJS), AWS, and MongoDB to join our growing engineering team.

This role requires someone who takes ownership, is proactive, and enjoys building scalable, high-performance backend systems in a fast-paced environment.

Key Responsibilities :

• Architect, design, and develop scalable backend services using Node.js (NestJS).
• Design and manage cloud infrastructure on AWS Services (EC2, ECS, RDS, Lambda, etc.).
• Develop and maintain high-performance database solutions using MongoDB.
• Work with Kafka, Docker, and serverless frameworks (SST) for efficient deployments.
• Optimize system performance, scalability, and reliability across services.
• Ensure application security, best practices, and compliance standards.
• Collaborate with cross-functional teams to deliver robust product features.
• Take end-to-end ownership of features from design to deployment.

Technical Requirements :

• 4+ years of backend development experience.
• 3+ years of hands-on experience with Node.js.
• 2+ years of hands-on experience with AWS.
• Strong experience with NestJS framework.
• Solid experience with MongoDB and database design.
• Experience with Kafka, Docker, and serverless architecture.
• Understanding of system design, scalability, and performance optimization.

Good to Have (Bonus Skills) :

• Experience with Python or other backend languages.
• Exposure to Agentic AI use cases or implementations.
• Strong understanding of security best practices.

What We’re Looking For :

• Curious mindset and eagerness to learn new technologies.
• Proactive problem solver with strong ownership attitude.
• Strong team player with effective communication skills.
• Positive, energetic, and passionate about building great systems.

Java Developer – Job Description 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. - 4 to 7 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. 

Minimum requirements

5+ years of industry software engineering experience (does not include internships nor includes co-ops)

Strong coding skills in any programming language (we understand new languages can be learned on the job so our interview process is language agnostic)

Strong collaboration skills, can work across workstreams within your team and contribute to your peers’ success

Have the ability to thrive on a high level of autonomy, responsibility, and think of yourself as entrepreneurial

Interest in working as a generalist across varying technologies and stacks to solve problems and delight both internal and external users

Preferred Qualifications

Experience with large-scale financial tracking systems

Good understanding and practical knowledge in cloud based services (e.g. gRPC, GraphQL, Docker/Kubernetes, cloud services such as AWS, etc.)

Duration: 6 months with possible extension

Location: Remote 

Notice Period: Immediate Joiner Preferred

Experience: 4-6 Years

Requirements:

• B Tech/M Tech in Computer Science or equivalent from a reputed college with a minimum of 4 – 6 years of experience in a Product Development Company
• Sound knowledge and application of algorithms and data structures with space and me complexities
• Strong design skills involving data modeling and low-level class design
• Good knowledge of object-oriented programming and design patterns
• Proficiency in Python, Java, and Golang
• Follow industry coding standards and be responsible for writing maintainable/scalable/efficient code to solve business problems
• Hands-on experience of working with Databases and the Linux/Unix platform
• Follow SDLC in an agile environment and collaborate with multiple cross-functional teams to drive deliveries
• Strong technical aptitude and good knowledge of CS fundamentals

What will you get to do here?

• Coming up with best practices to help the team achieve their technical tasks and continually thrive in improving the technology of the product/team.
• Driving the adoption of best practices & regular Participation in code reviews, design reviews, and architecture discussions.
• Experiment with new & relevant technologies and tools, and drive adoption while measuring yourself on the impact you can create.
• Implementation of long-term technology vision for your team.
• Creating architectures & designs for new solutions around existing/new areas
• Decide on technology & tool choices for your team & be responsible for them.

• 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

Must have skills :

JAVA 8, Apache Camel, Design Patterns, Web Services (REST), RabbitMQ, Build Tool (Maven or Gradle), Version Control (SVN or Git), SQL/PLSQL, Javascript, HTML, CSS, JQuery, Application Server (Websphere/JBoss/Weblogic etc.), JUnit.

Preferred skills :

- Spring, Spring MVC, Spring Boot, Hibernate/Spring Data JPA, .

- Experience working on Node JS/Angular JS/React JS

- Working experience on Docker

- Experience working on Agile methodologies

 B.E/B.Tech/M.C.A/M.Sc(Computer science ) with first division.

- AWS Cloud exposure.

- Basic skills in using the Unix operating system logging on, sudo to another ID, navigating directory structures, debugging simple problems.

- Hands-on experience with building enterprise applications.

- Excellent trouble-shooting skills.

- Thoroughly understanding business problems and the business domain, and how potential solutions may address problems and enhance business capabilities.

- Experience in designing/development (design patterns) and testing of enterprise class systems.

- Good written and verbal communication skills.

- Ability to adapt to changing requirements.

- Ability to take direction and work with minimal supervision.

- Ability to work in deadline driven environment, and respond creatively to pressure.

- Ability to work on multiple projects simultaneously.

As a product engineer, you will be responsible for continuous improvement of Cashfree experience for all our customers and end-users. You will dream big but identify and take small steps towards achieving that goal. You will receive great feedbacks at every step of the development cycle from your peers to our customers and end-users.

You may be working on architecting the money disbursement flow or creating most-friendly interface for consumer payment. All our engineers identify as generalist and building products that are useful and delightful are core to our engineering culture.

You're more than a coder. You wil be part of entire product process, from conceptualizing till post-launch evaluation. You should have deep empathy for the users to minimize the gap between what we build and what they need. Have sound judgement to balance between code writing speed and it's maintainability. Knowledge of variety of server-side/frontend frameworks is desirable but not compulsory.