
We're looking for a high-energy Java engineer to design and implement scalable microservices using Spring Boot. You'll collaborate across teams to deliver clean, efficient, and high-performance backend services.
š ļø Key Responsibilities
- Design, develop, and maintain RESTful services and microservices using Spring Boot
- Utilize OOP, Java Collections, Exception Handling, and method overloading/overriding in modern coding practices
- Build and optimize multithreaded systems (Threads, synchronization, wait(), notify(), yield()) for performance and scalability
- Write unit and integration tests (JUnit, Mockito, Spring Test) to ensure code quality
- Collaborate with cross-functional teams (QA, DevOps, Product) through code reviews and feature planning
- Diagnose and resolve performance bottlenecksJVM tuning, SQL/caching optimizations
- Adhere to coding standards, best practices, and participate in peer code review
šÆ Required Skills & Experience
- Strong Java fundamentals: OOP, Collections, Generics, Exception Handling
- Concurrency mastery: multithreading, synchronization primitives (wait(), notify(), yield())
- Spring Boot: solid experience building, testing, deploying REST APIs
- Microservices: design, inter-service communication, stateless service patterns
- Testing frameworks: JUnit, Mockito, Spring Test
- Performance tuning: profiling, optimization with JVM settings and database queries
- Tools & practices: Git, Maven/Gradle, CI/CD pipelines, Docker/Kubernetes (plus)
- Soft skills: strong problem-solving, collaboration, and effective communication

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 WorkĀ®. 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 Summary:
We are seeking a skilled and experienced Java Developer with hands-on expertise in AWS, Spring Boot, and Microservices architecture. As a core member of our backend development team, you will design and build scalable cloud-native applications that support high-performance systems and business logic.
Key Responsibilities:
- Design, develop, and maintain backend services using Java (Spring Boot).
- Build and deploy microservices-based architectures hosted on AWS.
- Collaborate with DevOps and architecture teams to ensure scalable and secure cloud solutions.
- Write clean, efficient, and well-documented code.
- Optimize application performance and troubleshoot production issues.
- Participate in code reviews, technical discussions, and architecture planning.
Must-Have Skills:
- 4.5+ years of experience in Java development.
- Strong proficiency in Spring Boot and RESTful APIs.
- Proven hands-on experience with AWS services (EC2, S3, Lambda, RDS, etc.).
- Solid understanding of microservices architecture, CI/CD, and containerization tools.
- Experience with version control (Git), and deployment tools.



Position:Ā Ā AEM DeveloperĀ
- Ā Exp : 5 to 7 Yrs
- JD for AEM DeveloperĀ
- Job FunctionĀ :
ā¢Ā Experienced Java Developer with knowledge in web framework based development and internet technologies
ā¢Ā Develop digital consumer experiences based on foundation of the Adobe AEM product suite, including AEM, CRX, Target and DAM
ā¢Ā Translate marketing and web site needs into AEM specific recommendations and solutions
ā¢Ā Leverage AEM, other state-of-the-art technologies, and integration patterns to solve cross-departmental challenges
ā¢Ā Design and improve internal development methodologies around Adobe AEM solution
ā¢Ā Deliver a robust self-service environment for the end user community
ā¢Ā Design and code from specifications, analyzes, evaluates, tests, debugs, documents, and implements complex software apps
ā¢Ā Create and integrate content-driven applications on top of AEMs core platform and integrate with E-commerce solutions and search engines
ā¢Ā Work with technology teams to build and maintain web applications using Adobe's Experience Manager CMS to include site architecture, custom components, workflow development, Digital Asset Management (DAM)
ā¢Ā Integrate websites with web analytics tools and analyze/report on analytics data
ā¢Ā Goal oriented and self-motivated
ā¢Ā Candidate must have the ability to work independently or within a team environment
ā¢Ā Strong oral and written communications skills with ability to create software design and engineering documents
ā¢Ā Ability to multi-task and deliver high quality work under tight deadlines is essential
ā¢Ā Ability to work in a fast paced environment is crucial
ā¢Ā Ability to learn, excel and deliver at a quick pace is required
ā¢Ā BS/BA or higher in Computer Science or related field
Qualification :
Ā Ā 5-7 years in Internet related system development for a public-facing internet web site. (Candidate must have prior experience with public-facing/internet web site development)
ā¢Ā Exposure to AEM Sites preferred
ā¢Ā Experience working with CMS platforms, and 5+ years of experience building with Adobe Experience Manager/CQ5
ā¢Ā Experience developing applications, templates, and components for the Adobe AEM product (WCM, DAM, CRX)
ā¢Ā Experience customizing workflows and integration with other enterprise systems
ā¢Ā Demonstrated experience with Java, JavaScript, HTML5, CSS3 and related technologies
ā¢Ā Working knowledge and understanding of the following: Apache Sling, Apache Felix, Apache and App server logs, OSGi, RESTful web services, Javascript, jQuery, AJAX, JSON, HTML, CSS
ā¢Ā Ability to write complex programs, analyze code changes and make suggestions to improve code complexity for maintainability and scalability.
Radisys Corporation is looking for JAVA Backend developers with 6-10 years of experience for their Bangalore location.
The ideal candidate will be able to design and develop code for tasks after brainstorming sessions and applying best practices and coding conventions.
This position requires experience in Java, Spring, Spring Boot, microservices, message broker, and DB knowledge. Candidates should be skilled in developing enterprise applications that consist of FE, BE, and DB integration.
If you have experience with Docker and Kubernetes, that's an added advantage.
Must-Have Technology Skills:
- OOP Concept,Ā JavaĀ 8+, Spring Boot, APIĀ development, Agile Scrum knowledge, Strong Databases design concepts of RDBMS, and capable of writing and optimizing complex queries.
Good understanding of any Database tool e.g. Postgres, MySQL, etc., - DevOps basic knowledge e.g. implementation of logging in the code, Application Performance Management.
- Basic API & Application security, and Basics of tuning application performance.
- Basic Understanding of DevOps concepts e.g. CI & CD, Deployment lifecycle, Basic understanding of unit testing concepts e.g. TDD (test-driven development).
- A basic understanding of Microservices patterns
- A basic understanding of Java scripting.
- Good understanding of UI Frameworks like Angular 8+
Ā
Must-Have Soft Skills:
- Verbal & Written English communication, Good Problem-solving skills,
- Good Planning skills,
- Team Player,
- Good leadership skills
- Good written and verbal communication
Ā
Job Description
Ā
- Good experience as a full-stack developer in DB-centric applications and should be able to write and optimize complex database queries
- Requirement gathering & understanding, effort estimation, technical design, project planning, and monitoring in an Agile environment.
- Work proactively & independently to address project requirements, and articulate issues/challenges with enough lead time to address project delivery risks.
- Providing expertise in technical analysis and solving technical issues during project delivery.
- Customer interfacing - understand customer requirements, and propose technical solutions.
- Full Software DevelopmentĀ Lifecycle (Agile).
- Code reviews, test case reviews and ensure code developed meets the requirements.
- Component Design/ Coding/ Unit Testing/ Debugging / Test Driven DevelopmentĀ / Continuous Integration.
- Carry out adaptive changes necessitated by changes in Business Requirements and Technology
Work as a member of a team responsible for developing a HIPAA compliant secure care coordination platform in accordance with established processes. You will apply your knowledge of building scalable, distributed applications and have the opportunity to work with new technologies & frameworks such as Spring Cloud Netflix, AWS, Azure, NoSQL DB.
Ā
Essential Functions include but are not limited to the following.Ā
Ā
You will be expected to:
- Contribute to all phases in the software lifecycle ā requirements analysis, solution design, development, and deployment
- Maintain high quality standards for the work undertaken and be responsible for the quality of deliverables
- Ensure assigned projects are developed in accordance with established engineering processes, adhering to scope, schedule constraints and agile project plans
- Guide/mentor the less experienced team members
- Participate in code reviews
- Work effectively as part of a distributed team
- Document the features worked by him/her
Key technical expertise areas expected for this role:
Strong programming skills in Java 8(+) with clear understanding of Object-Oriented and Functional programming.Ā
- Experience on REST API Programming based on a Microservices Architecture
- Good Understanding of Databases (MySQL & Mongo) and proficiency in database schema designing & writing efficient SQL QueriesĀ
- Strong troubleshooting skills
- Demonstrable ability to learn new programming languages and frameworks quickly
- Experience with distributed systems with specific focus on security and scalability
- Experience with modern cloud technologies such as AWS or Azure
Additional areas that would add value:
- Spring CloudĀ
- Experience working with AES 256 based encryption algorithms
- Strong understanding of Design Patterns & their application in system design
- Using DevOps & Infrastructure tooling such as GoCD/Jenkins, Git
- Experience working onĀ projects, preferably in the healthcare domain
- Experience working with Virtualization and Containerization technologies including Docker, Kubernetes.
- Automated Unit/Integration testing
- Experience working with Linux and Shell scriptingĀ
- Frontend web development with JavaScript frameworks like AngularJS
- Test Driven & Behavior Driven Development
- Experience working in Agile Scrum/Kanban methodologies
Education and Experience:
- Bachelors or Masterās in Computer Science or related fields.
- 5+ years of experience
Skills Needed: Java,Spring,Springboot,Microservices
Should have hands-on experience with Java
Should have hands-on experience with technologies like spring & springboot
Should have hands-on experience with Microservices Architecture
Experience:2 Yrs to 5 Yrs
Notice Period: Immediate to 10 Days(Max)
Location: Bangalore
Work from Home till Pandemic End
Location:Ā Hyderabad, India
Nisum is a leading global digital commerce firm headquartered in California, with services spanning digital strategy and transformation, insights and analytics, blockchain, business agility, and custom software development. Founded in 2000 with the customer-centric motto āBuilding Success TogetherĀ®,ā Nisum has grown to over 1,400 professionals across the United States, Chile, India, and Pakistan.Ā A preferred advisor to leading Fortune 500 brands, Nisum enables clients to achieve direct business growth by building the advanced technology they need to reach end customers in todayās world, with immersive and seamless experiences across digital and physical channels.
What Youāll Do
Coding in Java8, Spring, Microservices, WebFlux/Reactive Programing, Rest services, Kafka, PCF, Azure, Spring Cloud Config and NoSQL technologies.
Solve technical problems using cutting-edge technologies and best practices.
Ensure code meets the required development standards and is optimized for performance.
Unit testing for each line of new code introduced (JUnit/Mockito)
Peer code review process using GIT pull requests and Crucible (for SVN)
Propose multiple solutions to a problem, show how one option is better than another.
Ensure all aspects of technical design are correctly incorporated.
Contribute in research and implementing POCās as required.
Collaborating with onsite team in scrum ceremonies.
Who you are
Senior developer using technical skills in Java8, J2EE, Spring boot(rest services), Web Services(Rest & SOAP), WebFlux, Spring Cloud Config, Maven/Gradle, JUNIT/TestNG, Mockito/JMock/EasyMock, JIRA, XML, JSON, EhCache/MemCache/Redis with skills in JMS, Kafka
Experience with hands on any one of the cloud platforms like PCF, Azure
Need hands on skills using NoSQL databases (Cassandra, MongoDB), SQL(Oracle/DB2/MySQL)
Experience with UI development skills to the level of debugging and enhancements.
Experience with expertise in code quality and coding standards.
Need to applying different design patterns, especially GoF, J2EE and Integration design patterns.
Making sure implementing unit testing for each line of new code introduced (JUnit/Mockito).
Ensuring the code meets the required development standards and is optimized for performance.
Education
Bachelorās / Masterās degree in specific technical fields like computer science, math, statistics preferred; or equivalent practical experience.

- 2 - 7 years of experience in building applications using C++ programming language.
- Comfortable with core programming concepts and techniques (e.g. concurrency, memory management).
- Enjoys working with algorithms and data structures (e.g. trees, hash maps, queues).
- Strong in Data structure and good in problem solving.
- Strong debugging skills.
- Certifying the application ā White box testing, black box testing.
- Work onĀ building scalable backend platform for customer & seller apps, brands platform, demand generation platform, supply chain & logistics platform, credit platform and several cross platform software components
- Participate in the process to fundamentally change the food and grocery ecosystem in India, andĀ impact billions of people through technology, mobile, and data science
Requirements:
An ideal candidate for this role is someone who has-
- BE/BTech degree in Computer Science from a top engineering school
- 1-5 years of professionalĀ software development experience
- Strong problem solving skills andĀ strong command on object oriented design, data structures, algorithmsĀ and other computer science fundamentals.
- Strong coding skillsĀ - professional experience in developing production-quality software in Java/Python
- Expertise in Web Services, Service-oriented architecture, Databases, NoSQL, Distributed systems, Cloud Technologies.
- Extreme software engineering skillsĀ to design and develop low-latency, high availability, internet-scale web services
- SolidĀ understanding of the full software development life cycleĀ and software engineering best practices
- Ability toĀ understand business requirements and translate them into technical requirements
- DemonstratedĀ ability to own software design and developmentĀ end to end from requirements to launch.
- Ability toĀ collaborate with cross-functional teamsĀ to define, design, and ship new features.
- A startup mindsetĀ Ā - An athlete who can run at breakneck speed of a startup, yet someone who can bring method to madness through processes suitable for different stages of the company - early stage prototyping and rapid experimentation, before product/market fit, after product/market fit, and scaling.
- Familiarity withĀ Agile development, Scrums, continuous integration, and test driven development processes
- Data driven product development approach - strong focus on data backed engineering decisions.
- Ability to develop products incrementally in fast iterations
- Ability to do collaborative problem solving and design/build chaos resilient systems
- Strong focus on software quality
- Ability to mentor junior developers, and help build an excellent engineering team
- Ability to be a talent magnet - attract great talent to join the core team.

