
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. - 5-8 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 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.

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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Role Overview
Software Architect – Healthcare Interoperability is responsible for leading the design and development of a nextgeneration healthcare interface engine. This role involves integrating with various EHR systems such as Epic, Cerner, Athena, and Meditech, managing diverse data formats including HL7 v2, FHIR R4, X12/EDI, JSON, and XML, while ensuring the platform is scalable, compliant, and observable.
Responsibilities
- Design the architecture for a custom interface engine supporting HL7 v2, FHIR (R4), and X12 EDI etc transactions.
- Define routing, transformation, and queuing strategies for high-volume healthcare data exchange.
- Integration with EHRs (Epic, Athena, Cerner, Meditech) and clearinghouses.
- Establish error handling, retries, monitoring, and resilience patterns (Resilience4j, circuit breakers, observability).
- Mentor developers, review designs/code, and enforce best practices.
Technical Skills Required
- Java / Spring Boot (microservices, APIs, event-driven patterns)
- Integration frameworks: Apache Camel or Spring Integration
- Data mapping: Smooks, HAPI FHIR
- Message formats: HL7 v2, FHIR (STU3/R4), X12 EDI (837, 835, 270/271), JSON, XML, CSV etc
Architecture & Infrastructure:
- Cloud-native design (Azure / AWS)
- Kafka / RabbitMQ for messaging
- Observability: Grafana / Prometheus / ELK
- Security: OAuth2, JWT, mutual TLS, encryption at rest/in-transit
Domain Knowledge:
- Healthcare RCM (pre-billing edits, eligibility, claims, remittance)
- EHR APIs ( Epic App Orchard, Athena One, Cerner Ignite etc)
Experience
- 10+ years in software engineering with 3+ years in healthcare interoperability.
JOB RESPONSIBILITIES (About 10 - 11 years and at least 9 years relevant experience)
Develop Java webservices and components according to a detailed design document.
Build efficient, reusable and reliable Java code per industry best practices.
Follow TDD approach and ensure unit-test coverage meets quality requirements.
Develop Integration tests to ensure coding adheres to acceptance criteria and verify end-to-end behavior of the system.
Ensure best possible performance, quality and responsiveness of applications.
EXPERIENCE / SKILLS
Must have experience developing in Java latest version (least version is 8)
Must have experience in design and development using Micro service architecture
Solid knowledge in OOP concepts, and design principles/patterns for developing scalable applications
Must have experience developing Spring Boot applications
Must have experience developing database access layer using Spring Data JPA/Hibernates
Must have experience in developing REST Services using Spring
Good working experience in development of event driven systems using any framework
Must have experience with any RDBMS and at least one NoSQL database preferably PostgresSQL and Mongo DB
Must have experience writing unit and integration tests using Junit
Must have experience using mock frameworks like Mockito, WireMock
Must have experience using Git
Must have experience with CI / CD
Basic hands-on experience in one of the cloud provider (AWS/Azure) or at least docker and Kubernetes
Familiarity with build tools Maven or Gradle
Added advantage with experience of Reactive and Functional Programming
Job Description:
- Very good Core Java programming skills, with 7+ years of experience, of which 3 - 4 in core
- development programs.
- Expertise on Agile and Build (Jenkins/GIT/Continuous Integration)
- Rich experience in software development SDLC - Requirements, Analysis,
- coding, review process, build and test.
- Fair understanding Linux fundamentals
- Solid understanding of object-oriented programming
- Good English comprehension and communication skills, both oral and written,
- Ability to write routine business correspondence, and technical notes
- Strong customer service orientation, proactive in updates/blockers
- Solving complex performance problems and architectural challenges
- Building reusable code and libraries for future use
- Building efficient, testable, and reusable Node JS modules
- Building high performance frontend applications with react
- Responsible for End-to-end ownership of modules, including designing, development, validation, deployment
- Understanding fully synchronous behavior of Nodejs
- Familiarity with Workers/child processes & performance tuning
- Experience with SQL/NoSQL databases and their declarative query languages (MySQL, and MongoDB)
- Strong knowledge of the common Node Js & React or web server exploits and their solutions
What you need to have:
- A Bachelor's degree in Computer Science, or related technical discipline
- 1 to 3 years of Software Development experience
- Deep hands-on technical experience in object-oriented design, data structures, algorithm design, and complexity analysis
- Experience with full software lifecycle methodology, including; coding standards, code reviews, source control management, build processes, testing, and operations
- Ability to identify, empathize with and delight the customer
- Comfortable working with different Technologies across all of them as and when needed
- Strong knowledge on technologies/frameworks that we work on - Microservices Architecture, Python, Rest/gRPC, Node.js, MySQL, Postgres, AWS, ReactJS, React Native, Kubernetes.
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
Java Developer Job Description
We are looking for a Java developer responsible for building Java applications.
Responsibilities
- Design, build and maintain efficient, reusable, and reliable Java code
- Identify bottlenecks and bugs, and devise solutions to these problems
- Help maintain code quality, organization, and automatization.
Skill Set:
- Proficient in Java, with a good knowledge of its ecosystems
- Java, Rest API integration, JSON, XML, Oracle, Microservices, Agile Scrum.
- Experience in developing large-scale distributed systems.
- API knowledge
- Solid understanding of object-oriented programming
- Familiar with various design and architectural patterns
- Skill for writing reusable Java libraries
- Spring, Spring Boot, Spring Cloud, React native
- Experience: 04 to 10 years
- Salary: As Per Market
Zycus is looking for a Senior Software Engineer to join it's Engineering team. Candidates with experience working on Spring, Hibernate, Microservices, Angular/react, JMS/Rabbit MQ/Kafka, AWS Cloud and are passionate about building a product are encouraged to apply. Zycus is a Global leader and a pioneer in cognitive procurement software. Our clients are among the fortune 500 companies. We build enterprise AI procurement software product using some of the latest technologies.
In this role, you will work in developing a product which is not only recognized by Gartner as one of the top Source To Pay procurement software but is also industry's only organically-built & integrated source-to-pay suite.
Role and Responsibilities:
The Engineering team is looking for collaborative, passionate, and adaptable Senior Software Engineer.
- Strong coding experience of about 5-9 years.
- A team of experienced engineers with lots of interesting challenges to dive into.
- Modern technology stack: Cloud, Machine Learning, Artificial Intelligence, Microservices etc.
- Experience working on Spring, Spring Boot, Hibernate, Microservices, Angular/react, JMS/Rabbit MQ/Kafka, AWS Cloud.
- Should be able to build solution which is easily scalable, high speed/ real-time performance, configurable, deploy-able and secure in SaaS environment using any open source tech stack.
- Build features and modules from scratch & Maintain existing features and modules.
- Should be able to identify, track and mitigate risks to the product.
- Ability to work independently.
Requirements
- 5-9 years’ experience in Java, J2EE and associated technologies (Spring, Hibernate, Web Services, Micro Services, Spring boot)
- Technical Skills: Core Java, Advanced Java, J2EE, Exception handling, Collections, Oops, UML, Oracle, Jenkins, Maven & Linux
- Should be able to build solutions which is easily configurable, deploy able and secure in SaaS environment.
- Must have worked spring boot Extensively.
- Strong hands on development experience in Java, J2EE.
- Should be able to identify, track and mitigate risks to the product
- Responsible for planning product iterations & releasing iterations on schedule.
What should you have:
- Product development experience in agile environment will be a big plus though not mandatory.
- Highly Tech Savvy and hands-on.
- Strong evidence of a solution/product created ground up.
Product Development:
- Has in-depth knowledge on technology and end to end development processes.
- Has the ability to recommend new processes/alternatives to meet Product Development requirements and rolling them out.
Benefits
Five Reasons Why You Should Join Zycus
1. Cloud Product Company: We are a Cloud SaaS Company and our products are created by using the latest technologies like ML and AI. Our UI is in Angular JS and we are developing our mobile apps using React.
2. A Market Leader: Zycus is recognized by Gartner (world’s leading market research analyst) as a Leader in Procurement Software Suites.
3. Move between Roles: We believe that change leads to growth and therefore we allow our employees to shift careers and move to different roles and functions within the organization
4. Get a Global Exposure: You get to work and deal with our global customers.
5. Create an Impact: Zycus gives you the environment to create an impact on the product and transform your ideas into reality. Even our junior engineers get the opportunity to work on different product features.
About Us
Zycus is a pioneer in Cognitive Procurement software and has been a trusted partner of choice for large global enterprises for two decades. Zycus has been consistently recognized by Gartner, Forrester, and other analysts for its Source to Pay integrated suite. Zycus powers its S2P software with the revolutionary Merlin AI Suite. Merlin AI takes over the tactical tasks and empowers procurement and AP officers to focus on strategic projects; offers data-driven actionable insights for quicker and smarter decisions, and its conversational AI offers a B2C type user-experience to the end-users.
Zycus helps enterprises drive real savings, reduce risks, and boost compliance, and its seamless, intuitive, and easy-to-use user interface ensures high adoption and value across the organization.
Start your #CognitiveProcurement journey with us, as you are #MeantforMore
Click here to Apply :
https://apply.workable.com/zycus-1/j/A236ED266C/">Senior Software Engineer - Zycus (workable.com) - Pune.
https://apply.workable.com/zycus-1/j/B03314F49F/">Senior Software Engineer - Zycus (workable.com) - Mumbai.
Technical Competencies
- Strong Java/J2EE development experience with demonstrated ability to develop and troubleshoot large mission applications & Software Products
- Experience on exception handling, correct use of data structures, multi-threaded programming, memory management and application tuning
- Excellent exposure in Object Oriented Design skills using Java/J2ee along with:
- Core Java Language (Collections, Concurrency/Multithreading)
- JDBC concepts (connection pooling, statement, result set)
- Web Technologies (Struts/Struts 2, Spring (IOP, MVC, AOP), Hibernate, JSP, Web services)
- Database optimization and profiling
- Core/JEE/Integration Design patterns/UML
- Should have experience in Unit Testing
- Good hands on experience with RDBMS like MySQL/Oracle with ability to write SQL Queries/Stored Procedures/Triggers/Joins/View etc
- Practical application of software product development standards and methodologies including Agile, XP, Kanban, RUP and UML
- Ability to apply design patterns consistently and also accurate when building per design requirements
- Good experience in source control, unit testing, code verification, documentation, automated build, continuous integration, metrics, and code reviews.
- Demonstrated problem solving, analytic and troubleshooting skills.
- Strong written and oral communication skills are required to effectively engage internal stakeholders and their technical representatives.

