
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 clientfacing 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.
Please find the attached study material.
Data structure and Algorithms-
1. Basic Strings, Array and Mathematical based problems.
2. Sliding window problems
3. Problems solved using HashMap, Set and Stack.

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:
Location: mumbai
Mode of Work : 3 days from Office
DSA(Collections, Hash maps, trees, Linkedlist and Arrays, etc), Core Oops concepts(Multithreading, Multi Processing, Polymorphism, Inheritance etc) Annotations in Spring and Spring boot, Java 8 Vital features, database Optimization, Microsevices and Rest API
- Design, develop, and maintain low-latency, high-performance enterprise applications using Core Java (Java 5.0 and above).
- Implement and integrate APIs using Spring Framework and Apache CXF.
- Build microservices-based architecture for scalable and distributed systems.
- Collaborate with cross-functional teams for high/low-level design, development, and deployment of software solutions.
- Optimize performance through efficient multithreading, memory management, and algorithm design.
- Ensure best coding practices, conduct code reviews, and perform unit/integration testing.
- Work with RDBMS (preferably Sybase) for backend data integration.
- Analyze complex business problems and deliver innovative technology solutions in the financial/trading domain.
- Work in Unix/Linux environments for deployment and troubleshooting.
Required Skills & Experience:
- 3– 7 years of strong hands-on experience in Core Java, Spring boot, microservices, data structures.
- Deep understanding of Object-Oriented Programming (OOP), data structures, algorithms, and design patterns.
- Proven experience with Spring, CXF, and REST/SOAP web services.
- Solid understanding of microservices architecture and distributed systems.
- Experience working with Sybase or other relational databases.
- Expertise in multithreading, concurrency, and high-throughput server-side development.
- Exposure to capital markets, sales & trading platforms, or similar financial services applications.
- Good working knowledge of Unix/Linux environments.
- Experience in solution architecture and design documentation is a strong plus.
- Strong problem-solving skills, analytical thinking, and a proactive attitude.
- Excellent communication and interpersonal skills to work effectively with global teams.
Preferred Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
- Previous experience in investment banking, capital markets, or financial technology domains.
Senior Back-end Engineer Developer
What We Need
Looking for a senior back-end developer who will start working in our Bangalore office and then will be given an opportunity to move to Netherlands to work closely with our clients
- A highly motivated and experienced frontend software engineer / developer with a proven track record (at least 5 years of experience).
- A Bachelor’s degree in computer science.
- Someone who loves to work in a multidisciplinary team of engineers and business colleagues in a high-tech environment.
- You are able to work in a dynamic and demanding environment, a real team player and a speak-up mentality to promote your ideas in a concise way.
- You are a problem-solver and see yourself as a hardcore web developer.
- You have knowledge of, and experience with, different web technologies.
- You are skilled with implementing architecture & design patterns.
- You can write modular code that is configurable, extensible and testable.
- You have great analytical skills, conceptual understanding and able to quickly understand new technical concepts.
- You have a strong interest in the latest trends in software development & web technologies.
- You have strong communication skills to explain complex technical concepts.
- You are fluent in English both in verbal and written.
We are looking for a back-end engineer / developer:
Proficiency / experience with following technologies & tools:
- Thorough and deep understanding of Java JDK 11+, our foundational programming language
Spring Framework & AOP v5.2+
- Proven experience working with, and a deep understanding of Spring Boot 2.5+ and its modules (Web, Data JPA, Security OAuth2) and ability to explain complex use-cases related to persistency and web security
- Experience with Maven v3+
- Experience with containerization and deployments tools (eg. Docker v20+ and Kaniko, Helm (charts) v3+ with Kubernetes deployments)
- Experience working with CI/CD tools like GitLab SCM & pipelines and JFrog Artifactory
- Strong knowledge working with different types of SQL and NoSQL databases such as PostgreSQL v12+, MongoDB v4+ and Neo4J v4+
- Proficient in working with DevOps engineers on Cloud deployments (eg. Azure subscriptions)
- Experience in Agile/Scrum & (pref.) SAFe (Scaled Agile Framework) and enabling tooling – Atlassian Jira Cloud / Jira Align
- Experienced and skilled in full-stack development.
- Leading and solutioning product development of secure and high-performance applications.
- Good understanding of REST APIs and working knowledge of HTTP(S).
- Experienced in testing stack – Junit / Mockito
- Experience with software quality & vulnerability testing – SonarQube and Blackduck
- Proficient in writing software documentation on Atlassian Wiki
- Proficient in implementing data structures, algorithm design and OOPs concepts.
What you will do?
Project Management
- Work with the product management team to create an engineering roadmap that aligns with the product roadmap.
- Translate engineering roadmap into executable internal projects, and own the end-to-end execution of these projects.
- Plan, execute and deliver projects as per schedule, content, and quality metrics.
- Manage the day-to-day activities of the engineering team using Agile practices.
- Keep stakeholders continually updated on the progress of projects and operations.
- Track and report engineering health metrics (such as bugs by severity, production incidents etc.)
People Management
- Hire and mentor a team of engineers
- Manage learning and development, and performance of your team.
- Own, Conceptualize and Build a tech-focused team
Technical Work
- Core stakeholder to all technical design and architecture of team.
- Review code, test plans, and deployment plans.
- Focus and Strengthen all aspects of reliability
What we look for?
Must Haves
- Experience in telecom messaging software systems.
- Experience in distributed and scalable systems.
- Communication skills - excellent written and oral communication to present complex ideas/concepts in a clear and concise manner; communicating with key stakeholders with work/project progress.
Good to Have
- Experience in telecom messaging software systems.
- Experience in distributed and scalable systems.
- Communication skills - excellent written and oral communication to present complex ideas/concepts in a clear and concise manner; communicating with key stakeholders with work/project progress
Job Summary:
We want a techie at heart. Someone who is happy and curious to work on all aspects of software development.
Reporting directly to the CTO, you will be responsible for feature design, development, and continuously optimizing our tech stack.
- We are looking for an experienced software engineer with at least 5 years of experience in a startup or product environment. Ideally you have been involved in all aspects of software development from requirements gathering to design, development, deployment and post-release support. We are looking for all-round technical maturity. Our tech stack is Angular, Spring boot and Django/Python.
Key Skills
Java
SpringBoot
PostgreSQL/MySQL
Git
AWS
REST api design
Experience integrating with external APIs
Good applied understanding of Object Oriented Programming
Good database modeling and SQL knowledge.
/React is a big plus.
Responsibilities and Duties
Build out features across the stack : backend, API design and integration, database optimization , microservices, plugins, queues etc
Fix bugs and write automated tests
Maintain and upgrade our Tech Stack
Translate requirements to design and write/present articulate software design.
Post – Java Full Stack Developer
Total Experience – 5 to 8 years
Relevant Experience – 3 Years plus
Salary – Good Hike on CTC
Location – Bangalore, Chennai, Pune
Qualification - Graduation is must
Industry – Information Technology
Mandatory Skills – Java, react/Angular atleast 3 years of experience, cloud Technology, Micro services Architect
Desired Skills - Machine Learning and Artificial
Roles & Responsibilities
- To drive and shape the technical roadmap & delivery of our next Enterprise Cloud based Applications driven by AI,ML products that impact millions of users on a daily basis. You will partner with a wide range of stakeholders from product, data science, and business, own and evolve the roadmap and technical strategy to build game changing tech for various teams. This is a highly critical and visible role that has a tangible impact on both internal user and external customer experience, as well as the company's bottom-line
PLEASE REPLY WITH YOUR UPDATED CV and KINDLY REFER YOUR FRIENDS / COLLEAGUES FOR THIS JOB.
Role Description :
- Good Understanding of Java 8 with proven hands-on skills
- Experience in Spring Framework - Spring Boot, Spring Data, Spring REST
- Experience in Spring Reactive
- Experience in Git, Gradle / Maven
- Practitioner of clean code and SOLID principles
- Able to test drive features
- Can debug code at ease and ensure quality code is produced
- Knowledge of design patterns
- Comfortable with agile practices, user stories and task breakdown
- Understands REST principles and Micro services
- Experienced with technologies such as
- Required Java, Spring Boot
- Good to have Maven, GIT, Swagger, PCF, Rabbit MQ
- Good API skills technology such as Rest Webservice
- Good foundation in data structures, algorithms and OO Design with rock solid programming skills
- Experienced on creating unit test using JUnit, Mockito or PowerMock
- Experienced on mark up language such as JSON and YML
- Experienced on using Quality and Security scan tools such as Sonar, Fortify and WebInspect
- Experienced on agile methodology
Skills required are Java, microservice,Spring boot, and knowledge of AWS.
Location; Pune.
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.
What will you do?
- You will be responsible for the design and development of large-scale, multi-tenant, distributed systems using scalable, fault-tolerant architecture with distributed queues (kafka), distributed caches (redis), high volume data stores (MongoDB, Cassandra, elasticsearch), container-centric deployments (kubernetes).
- Write Java codes using best practices with high quality standards.
- Participate in code reviews and deep dive into design discussions.









