
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.
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JOB DESCRIPTION
- Has in-depth understanding of the full software development life cycle. Deep familiarity with data & business analysis, along with modern software design &development concepts encompassing a range of languages & platforms.
- Can work within an Agile team to ensure that all key technical requirements are identified, estimated, designed, implemented, and tested.
- Can work on a collaborative cross-technology team where Java, APIs (services), PL/SQL interact with a range of business logic interfaces & systems.
- Can own small to medium scale strategic initiatives/projects, enhances process standards and best practices, and supports issues during UAT/system rollout phases.
- Understands business needs and priorities and provides thought leadership on potential solutions and the opportunities for technology to create positive impact on the business.
- Has excellent analytical and problem-solving skills that are coupled with strong communication, anticipates issues, and deals with them proactively.
- Is team oriented, highly collaborative, works effectively to build strong long-term partnerships with stakeholders at all levels of the organization and across a variety of business and IT functions.
- Self-sufficient and shows ability to lead, given the opportunity
- Demonstrates a passion for technology innovation balanced with a pragmatic approach to developing and deploying solutions that best benefit the business.
- Nimble, adaptable, able to express ideas in meetings & design discussions, comfortable with ambiguity; course correct when circumstances change.
QUALIFICATIONS
- Bachelor of Engineering / 2-3 years of experience
- Willing to work on Testing
PRIMARY SKILLS
- Hands on experience with on Java 11 with Spring Cloud Microservices ecosystem(multi-threading, data structures, design patterns and OOP practices etc).
- Ability to Query Relational Databases like DB2, Sybase and Cloud data sources like snowflake.
- Spring, SOAP & REST Web Services with on XML/JSON based data.
- Experience with DevOps tools and Git.
- Test Driven development (TDD) and experience working in a disciplined development environment.
- Exposure to Azure Cloud experience is a plus.
GOOD TO HAVE SKILLS
- Business analysis – focused on investment management process and tools.
- Some experience into Automation Testing.
We are looking for a highly motivated senior developer with at least 3+ years of strong hands-on experience in Java to join our startup. You would be playing pivotal role in contributing to the initial tech stack. You would be further responsible for designing and implementing product requirements that are highly usable, scalable, extensible and maintainable. You should be comfortable on working across different technologies/frameworks that we work on - Microservices, Java, Spring, Spring Boot, MySQL, Kubernetes, AWS.
Responsibilities and Duties:
- Design and build scalable REST APIs on Spring Boot
- Develop, test, tune for performance and deploy microservices
- Collaborate with the team, optimize and refactor the back-end architecture
- Maintain high standards of quality for code, documentation and other deliverables
- Active cross-team coordination would be expected
- Architecture and tech stack discussions to optimize for increasing server load
- DevOps tasks along with AWS features exploration
What are we looking for?
- Strong 3+ year experience in Core Java & backend technologies
- Good working knowledge of design patterns & OOAD
- Excellent analytical and problem-solving skills
- The skills that we consider: Java, MySQL/RDS, Spring/ Play, Maven, Redis, Kafka/SQS, Elasticsearch, AWS
- Experience with designing, implementing and deploying microservices
- Previously worked in a startup
Experience: 2-8 years
Skills
* Hands-on development skills in Java8 features like Streams, Lambda expressions, Enhanced for loops, Parallel processings, etc.
* Hands-on development skills in Springboot, Microservices & JPA/Hibernate.
* Experience in designing, analyzing and troubleshooting large-scale distributed systems.
* Experience in any Java based rule engine implementation for workflows.
* Experience in Dockers, ElasticSearch, Messaging and any RDBMS.
* Experience with Swagger, Git, Jenkins & Maven.
* Experience with any of Nosql databases.
Function: Technology
Purpose of the Job:
The Developer will be part of a cross-functional Scrum team responsible for designing, developing, and testing diverse features of Airtel Payments Bank agile stream. Payments bank values software engineers who are motivated, creative, passionate and positive. You must be comfortable working closely with others and have solid communication skills. Software engineers who learn quickly and have strong technical skills will thrive at Airtel Payments Bank. You must have considerable experience with object-oriented programming and should be familiar with design patterns, data structures, database and other staples of practical software development
Key Deliverables :
- Research, design, implement and managing software programs
- Test and evaluate new programs
- Identify the areas for modification in existing programs and subsequently developing these modifications
- Writing and implementing efficient code
- Determining operational practicality
- Deploying software tools, processes and metrics
- Maintaining and upgrading existing systems
Skills Required:
- Should have experience of working on Core Java/J2EE & OOPS concept
- Should be well versed with Spring/Struts & Apache Camel (OSGI Framework)
- Should have a good understanding of Hibernate and Other ORMs
- Technical design, implementation, deployment, and support.
- Perform development and unit testing, working closely with Business.
- Web Service (SOAP/REST) , Maven
- Build tool such as Jenkins
- Caching Technique(Radis, Hazlecast, aerospike)
- Database Knowledge - Oracle, MySQL
Qualification: Technical background (BS/MS in Computer Science/Engineering or related discipline/experience)

About the job
We focus on client adoption of disruptive technologies, technology architecture and providing specialized skills related to integration, custom software engineering, testing, application modernization, agile and more. We help our clients with the most complex projects including working in open web platforms, DevOps platforms as well as intelligent Computing and Architecture enhancement.
We are looking for hands on, smart thinking Applications developer to join our fast-growing team of talented professionals. You will have the opportunity to work on large enterprise solutions and deliver solutions that deliver business performance for our customers.
WORK YOU’LL DO
- Design and develop microservices/APIs using either Java/Spring boot, ISTIO, Kubernetes, Docker, CI / CD Pipelines
- You would scale micro services using Kafka or similar messaging systems.
- Collaborate with clients, architects, and application architectures to understand the operational objectives and purpose of the future system integration.
- Understand the points of integration between the different systems and highlight the potential risks associated with the delivery of solutions
- Collaborate with Functional Designers and Developers in order to find best solutions
- Produce detailed functional and technical specifications.
- Assist in producing solutions with threat assessments and associated security awareness.
WHAT WE ARE LOOKING FOR
- 5- 8 years of hands-on experience designing and developing microservices using either Java/Spring Boot
- 3-5 years of experience with system integration
- Minimum of 3 years of relevant experience with API concepts and technologies such as REST, JSON, XML, SOAP, YAML, GraphQL, and Swagger
- Experience developing within agile methodology using CI/CD pipeline
- Experienced in 3-tier, n-tier, cloud computing, microservices architectures and SOA.
- Good knowledge of integration architectures
- Experience supporting and/or implementing complex integration projects
- Excellent client management skills
- Experience with Data modelling would be an asset
QUALIFICATIONS
- Experience of working in an Agile Environment
- Ability to drive design from Stories and Requirements
- Adept at UML, Design Patterns, Reusable Services Development,
- Knowledge on Scaling Microservices
UserExperior is a fast-growing, well-funded software product start-up based in
Mumbai with marquee clients from India in its portfolio. UserExperior empowers
product teams to build great applications for their customers. At UserExperior we are
focused on building the best mobile app analytics platform. As part of our engineering
team, you will be working on exciting & challenging problems. We are looking for
talented, enthusiastic and self-driven software engineers who are passionate about
software engineering and want to build great products.
Roles & Responsibilities :
● You’ll work as part of the software engineering team along with other front-end,
back-end, mobile app, QA teams & you will also closely work with the founder.
● You should be able to take the ownership of a project end to end.
● Your primary focus will be to build, implement & maintain the complete back-end
stack of the product.
● You will create production grade code and will implement the solutions which run
bug free.
● Participate in product development discussions and product development
road-maps.
● Collaborate with members across departments to identify and build on
improvements to product, process and systems.
Required Experience and Qualifications:
● 2 to 6 years of software development experience.
● Experience of working on application architecture design will be preferred.
● Experience of working in at least 1 or 2 projects, managing or leading the entire
tasks.
● Experience in Docker/Kubernetes, Agile methodologies & CI/CD automation
process.
● Knowledge of Queueing technologies like Kafka, RabbitMQ, ActiveMQ, Version
control using Git.
● Experience in microservices architecture, in-memory systems like Redis and
basic knowledge of Linux/Unix systems.
● Experience of building applications processing large volumes of streaming data
will be preferred.
● Experience from a middle size company or from a startup will be preferred.
● BE/MCA/MSc in Computers/Information technology with a good academic
record.
Key Skills:
● Java, & Spring boot
● Hibernate
● Spring Boot JPA
● Object Oriented Programming
● MySQL & MongoDB
● Jenkins
Perks & Benefits:
● Great learning, innovative and development platform.
● Remote work and flexible timings.
● Reimbursement of the online learning courses on certification.
● Medical insurance coverage for you and the dependence.
● Five Working days per week.
Involvement in the full software development life cycle within broadly defined parameters and providing software solutions keeping into consideration the software quality needs
Design and defining the interaction between the different component pieces
Write efficient code based on brief given by team lead.
Fast prototyping of proof-of concept features / application based on brief.
Develop and maintain new features on Java stack
Own the delivery of an entire piece of a system or application
Management and execution against project plans and delivery commitments
Work closely with the peers and Leads to develop the best technical design and approach for new product development
Build software solutions for complex problems.
Compliance with build/release and configuration management process
Responsibility to develop unit test cases for his/her project module.
Execution of appropriate quality plans ,project plans ,test strategies and processes for development activities in concern with business and project management effort
Desired Profile:
GoodunderstandingofObjectOrien
Development across multiple browsers/platforms on Website
Good Understanding of SQL/NoSQL data stores
Fair Understanding of Responsive High Level Designs
Work experience in product/start-up company is a plus
Familiarity to MVC, SOA, RESTFull web services
Work with other teams and manage time across multiple projects and tasks in a deadline driven, team environment
Good to have knowledge of Javascript (AngularJS/ReactJS)/HTML/CSS/
Understand agile methodology and instill best practices into the process.
Required Skills
- As a Senior Core Java Developer, you will have a range of responsibilities from shaping and implementing strategic products to ensuring that company stays on the leading edge of technology
- You will have generic capabilities across application development stack and strong technical expertise in one / two application layers
- Excellent working knowledge of the following technologies:
- Implementation exp (hands-on) on Server Side Java technologies (Core Java, Multithreading, Concurrent API’s, Executor services, collections, concurrent packages, DS/Algo, design patters/principles, basic data case, Junit/agile)
- Design Patterns
- SQL and Relational Databases such as DB2
- Hands-on experience on Spring and Hibernate

