
We are looking for an experienced Java Developer with strong proficiency in Kafka and MongoDB to join our dynamic team. The ideal candidate will have a solid background in designing and developing high-performance, scalable, and reliable applications in a microservices architecture. You will be responsible for building real-time data processing systems, integrating various services, and ensuring smooth data flow across systems.
Key Responsibilities:
- Design, develop, and maintain scalable Java applications with a focus on performance and reliability.
- Build and maintain Kafka-based real-time data pipelines for handling high-volume, low-latency data.
- Work with MongoDB to design and optimize database schemas and queries for high throughput and availability.
- Collaborate with cross-functional teams to define, design, and implement new features and improvements.
- Troubleshoot and resolve issues related to system performance, scalability, and reliability.
- Ensure software quality through best practices, including testing, code reviews, and continuous integration.
- Implement and maintain security best practices in both code and data handling.
- Participate in agile development cycles, including sprint planning, daily standups, and retrospectives.
Required Skills & Qualifications:
- 7+ years of experience in Java development, with a strong understanding of core Java concepts (J2EE, multithreading, etc.).
- Hands-on experience with Apache Kafka, including setting up brokers, producers, consumers, and understanding Kafka Streams.
- Proficient in working with MongoDB for designing efficient data models, indexing, and optimizing queries.
- Experience with microservices architecture and RESTful APIs.
- Familiarity with containerization technologies like Docker and orchestration tools like Kubernetes is a plus.
- Strong understanding of distributed systems, message-driven architectures, and event streaming.
- Familiarity with version control systems like Git.
- Excellent problem-solving skills, with the ability to debug and optimize code for high-performance systems.
- Experience with CI/CD pipelines and automated testing.

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.
Connect with the team
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Python Software Engineer (3–5 Years Experience)
Location: [Pune]
Role Overview
We are seeking skilled Python engineers to join our core product team. You will work on backend services, API development, and system integrations, contributing to a codebase of over 250,000 Python lines and collaborating with frontend, DevOps, and native code teams.
Key Responsibilities
· Design, develop, and maintain scalable Python backend services and APIs
· Optimize performance and reliability of large, distributed systems
· Collaborate with frontend (JS/HTML/CSS) and native (C/C++/C#) teams
· Write unit/integration tests and participate in code reviews
· Troubleshoot production issues and implement robust solutions
Required Skills
· 3–5 years of professional Python development experience
· Strong understanding of OOP, design patterns, and modular code structure
· Experience with MongoDB (PyMongo), Mako, RESTful APIs, and asynchronous programming
· Familiarity with code quality tools (flake8, pylint) and test frameworks (pytest, unittest)
· Experience with Git and collaborative development workflows
· Ability to read and refactor large, multi-module codebases
Nice to Have
· Experience with web frameworks (web.py, Flask, Django)
· Knowledge of C/C++ or C# for cross-platform integrations
· Familiarity with CI/CD, Docker, and cloud deployment
· Exposure to security, encryption, or enterprise SaaS products
What We Offer
· Opportunity to work on a mission-critical, enterprise-scale product
· Collaborative, growth-oriented engineering culture
· Flexible work arrangements (remote/hybrid)
· Competitive compensation and benefits
About Us:
Tradelab Technologies Pvt Ltd is not for those seeking comfort—we are for those hungry to make a mark in the trading and fintech industry. If you are looking for just another backend role, this isn’t it. We want risk-takers, relentless learners, and those who find joy in pushing their limits
every day. If you thrive in high-stakes environments and have a deep passion for performance driven backend systems, we want you.
What We Expect:
• You should already be exceptional at Backend. If you need hand-holding, this isn’t the place for you.
• You thrive on challenges, not on perks or financial rewards.
• You measure success by your own growth, not external validation.
• Taking calculated risks excites you—you’re here to build, break, and learn.
• You don’t clock in for a pay check; you clock in to outperform yourself in a high-frequency trading
environment.
• You understand the stakes—milliseconds can make or break trades, and precision is everything.
What You Will Do:
• Develop and optimize high-performance backend systems in for trading platforms and financial services.
• Architect low-latency, high-throughput microservices that push the boundaries of speed and efficiency.
• Build event-driven, fault-tolerant systems that can handle massive real-time data streams.
• Own your work—no babysitting, no micromanagement.
• Work alongside equally driven engineers who expect nothing less than brilliance.
• Learn faster than you ever thought possible.
Must-Have Skills:
• Proven expertise in Backend (if you need to prove yourself, this isn’t the role for you).
• Deep understanding of concurrency, memory management, and system design.
• Experience with Trading, market data processing, or low-latency systems.
• Strong knowledge of distributed systems, message queues (Kafka, RabbitMQ), and real-time processing.
• Hands-on with Docker, Kubernetes, and CI/CD pipelines.
• A portfolio of work that speaks louder than a resume.
Nice-to-Have Skills:
• Past experience in fintech, trading systems, or algorithmic trading.
• Contributions to open-source projects.
• A history of building something impactful from scratch.
• Understanding of FIX protocol, WebSockets, and streaming APIs.
Why Join Us?
• Work with a team that expects and delivers excellence.
• A culture where risk-taking is rewarded, and complacency is not.
• Limitless opportunities for growth—if you can handle the pace.
• A place where learning is currency, and outperformance is the only metric that matters.
• The opportunity to build systems that move markets, execute trades in microseconds, and redefine fintech.

Roles:
- Design, develop, implement, and maintain java application phases, code, and software.
- Conduct software analysis, programming, testing, and debugging, as well as recommending changes to improve the established processes.
- Transform requirements into stipulations and identify production and non-production application issues
- Competence and comfort using multiple frameworks (e.g. Spark, Storm, Hadoop, Angular 2/4/5, Spring Boot)
- Strong attention to detail with the ability to identify errors and make adjustments in a testing environment.
Key Responsibilities:
- Rewrite existing APIs in NodeJS.
- Remodel the APIs into Micro services-based architecture.
- Implement a caching layer wherever possible.
- Optimize the API for high performance and scalability.
- Write unit tests for API Testing.
- Automate the code testing and deployment process.
Skills Required:
- At least 2 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds.
- Excellent hands-on experience using MySQL or any other SQL Database.
- Good knowledge of MongoDB or any other NoSQL Database.
- Good knowledge of Redis, its data types, and their use cases.
- Experience with graph-based databases like GraphQL and Neo4j.
- Experience developing and deploying REST APIs.
- Good knowledge of Unit Testing and available Test Frameworks.
- Good understanding of advanced JS libraries and frameworks.
- Experience with Web sockets, Service Workers, and Web Push Notifications.
- Familiar with NodeJS profiling tools.
- Proficient understanding of code versioning tools such as Git.
- Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms.
- Should be a fast learner and a go-getter — without any fear of trying out new things Preferences.
- Experience building a large scale social or location-based app.
Job Description :
We are looking for a Backend Developer to join our Software Development team in Gurgaon.
At Zunpulse, you can expect to design flexible and scalable solutions and work on complex
challenges by utilizing skills in data structures, algorithms, and object-oriented programming. You
will be part of the team that develops state-of-the-art products which aim at helping millions of
customers.
Job Description
- Must have worked on Spring, Spring boot framework
- Strong Java developer skills
- Should have strong knowledge of Data Structures and Algorithms
- Should be well versed with Agile Development methodologies
- Prior experience in handling backend
- Should have strong debugging and communication skill
- Microservices experience would be a plus
- Built backend for Android, iOS applications in past
- Well versed with AWS deployments
- Excellent problem-solving skills
- Experience in SQL or Mongo Database
- Perform UI tests to optimize performance
- Write clean reusable code
Essential Qualification
• Bachelor’s degree in Computer Science/ Electronics or equivalent.
• Graduated in 2020/21 having 1-2 years of industrial experience
Skill-set
Spring boot, Java, Flask, Python, Data Structures, Algorithms, Basic knowledge of AWS/GCP
What we offer
● Growth-oriented culture
● Limitless learning opportunities by working with cutting edge tech stacks and with a
diverse and talented team
● Excellent compensation with competitive benefits
● Flexible work environment
● A chance to make an impact on our business strategy using your work
About zunpulse:
Zunpulse is India's leading smart electricity brand. Backed by Godrej, we are a 150+ member
engineering team led by co-founders from IIT Kharagpur, IIT Delhi & IIT Kanpur. We have developed
the largest range of IoT and AI-enabled smart home products with one single offering in mind
#phonesekarocontrol. Founded in June 2016, we have impacted 1,00,000 + homes to date.
Customers are looking for comfort, convenience, and security, all of which zunpulse provides with a
single app, to provide it all with a hyper-personalized experience. With the zunpulse app, the team is
creating a new way for the customers to manage their lives while keeping them cool, fun, and trendy.
With an all-around IoT tech solution, zunpulse is set to create a future smart home suite that can
transform how you live and interact with your home.
To know more about us refer:
https://www.zunpulse.com/
Java Developer Responsibilities:
- Designing and implementing Java-based applications.
- Analyzing user requirements to inform application design.
- Defining application objectives and functionality.
- Aligning application design with business goals.
- Developing and testing software.
- Debugging and resolving technical problems that arise.
- Producing detailed design documentation.
- Recommending changes to existing Java infrastructure.
- Developing multimedia applications.
- Developing documentation to assist users.
- Ensuring continuous professional self-development.
Java Developer Requirements:
- Degree in Computer Science or related field.
- Experience with user interface design, database structures, and statistical analyses.
- Analytical mindset and good problem-solving skills.
- Excellent written and verbal communication.
- Good organizational skills.
- Ability to work as part of a team.
- Attention to detail.
B.Tech./ BE - Computer, IT, Electronics only
Required Skills:
- 3+ year of experience in Development in JAVA technology and springboot
- Strong Java Basics
- SpringBoot or Spring MVC
- Hands on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
- Proficient in REST API development
- Messaging Queue (RabitMQ or Kafka
- Any Caching Mechanism
- Good at problem solving
Good to Have Skills:
- 3+ years of experience in using Java/J2EE tech stacks
- Good understanding of data structures and algorithms.
- Excellent analytical and problem solving skills.
- Ability to work in a fast paced internet start-up environment.
- Experience in technical mentorship/coaching is highly desirable.
- Understanding of AI/ML algorithms is a plus.
Node JS Developer
Job Description:
-
Node JS Developer
Job Description:
- 1 year development experience in NodeJs(v4 and above)
- Knowledge in Unit testing frameworks like Mocha
- Experience in working with any NodeJs web framework(Express or Hapi)
- Development experience using any persistent store (NoSql or Relational)
- Formal Deliverables
- Design and development of new and enhance existing applications using Node.JS
- Collaborate with internal and external team members to ensure projects get delivered as planned
- Develop Backend services using HapiJs
- Develop background workers based on cron or rabbitmq messages
- Support existing and new features via bug fixes, prod support or monitoring scripts
- Knowledge in Unit testing frameworks like Mocha
- Experience in working with any NodeJs web framework(Express or Hapi)
- Development experience using any persistent store (NoSql or Relational)
- Formal Deliverables
- Design and development of new and enhance existing applications using Node.JS
- Collaborate with internal and external team members to ensure projects get delivered as planned
- Develop Backend services using HapiJs
- Develop background workers based on cron or rabbitmq messages
- Support existing and new features via bug fixes, prod support or monitoring scripts
Job Description:
We are looking for a Java Developer with experience in building high-performing, scalable,enterprise-grade applications.
You will be part of a talented software team that works on mission-critical applications. Java
developer roles and responsibilities include managing Java/Java EE application development
while providing expertise in the full software development lifecycle, from concept and design to
testing.
Responsibilities and Duties
• Contribute to all phases of the development lifecycle
• Write well designed, testable, efficient code
• Ensure designs should follow compliance with specifications
• Prepare and produce releases of software components
• Support continuous improvement by investigating alternatives and technologies and
presenting these for architectural review
Qualifications
• BS/MS degree in Computer Science, Engineering, or a related subject
• Minimum 4.5 to 6 years of software development experience
• Proven hands-on Software Development experience
• Proven working experience in Java development
• Hands on experience in designing and developing applications using Java EE
platforms
• Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2,
Hibernate)
• Experience in the Spring Framework
• Very good English communication skills
• Optional:
o Good to have the knowledge of Angular JS framework.
o Experience to work on the Microservice architecture.
o Experience to work with Git hub & bitbucket.
o Agile methodology.








