
Minimum 3+ Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork joins pool and other threading concepts)
· Good knowledge of the JVM with an understanding of performance and memory optimization.
· Extensive and expert programming experience in JAVA programming language (strong OO skills preferred).
· Excellent knowledge on collections like, Array List, Vector, LinkedList, HashMap, Hash Table, HashSet is mandate.
· Exercised exemplary development practices including design specification, coding standards, unit testing, and code-reviews.
· Expert level understanding of Object-Oriented Concepts and Data Structures
· Good experience in Database (Sybase, Oracle or SQL Server) like indexing (clustered, non-clustered), hashing, segmenting, data types like clob / blob, views (materialized), replication, constraints, functions, triggers, procedures etc.

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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What you will be doing
- Building and maintaining Java micro services.
- Develop new features and improve existing features of the application.
- Coding, Implementing, Unit Testing and Documenting Java based services.
- Design, build, and maintain efficient, reusable, and reliable Java code.
- Code reviews and ensuring adherence to software development standards.
- Contribute to team and organizational improvements in process and infrastructure.
- Participating in requirements gathering and functional specification activities.
- Resolving and helping to mitigate production issues.
What you need to be successful
- Has proven himself as a solid individual contributor and has some initial management ability
- Understands the culture and upholds it
- Well respected with the team
- Looking to grow more as a manager than as an engineer
- Split time b/w hands-on technical work and people management of a small team
- Be a role model for the people in your team
- Responsible for team mentorship, technical planning, resource allocation & project delivery
- Build solid working relationships with counterparts outside engineering
- If we shortlist you for a lead role, then you'll have to mentor SDE-1 towards their SDE-2 journey.
- Progress up to manager in 2-3 years
- Strong Data Structure and Algorithms
- Experience of building micro services architectures, developing RESTful services,continuous integration, unit and integration testing.
- Proficient with SpringBoot, Hibernate, JUnit and other Java frameworks apart from RDBMS and NoSQL databases - PostgreSQL, MongoDB
- Gauge or other BDD frameworks and experience in Fintech would be preferred.
Wissen Technology is now hiring for Java Developer with hands on experience in Core Java, multithreading, algorithms, data structure and SQL skills .
Required Skills:
- Experience - 5 to 10 years.
- Experience in Core Java 5.0 and above, CXF, Spring.
- Extensive experience in developing enterprise-scale n-tier applications for financial domain. 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, preferably Sybase database.
- Good knowledge of multi-threading and high-volume server-side development.
- Experience in sales and trading platforms in investment banking/capital markets.
- Basic working knowledge of Unix/Linux.
- Excellent problem solving and coding skills in Java.
- Strong interpersonal, communication and analytical skills.
- Should have the ability to express their design ideas and thoughts.
- 3+ year of experience in Development in JAVA technology.
- Strong Java Basics
- SpringBoot or Spring MVC
- Hands on experience on Relationl Databases (SQL query or Hibernate) + Mongo (JSON parsing)
- Proficient in REST API development
- Messaging Queue (RabitMQ or Kafka)
- Microservices
- Any Caching Mechanism
- Good at problem solving
Good to Have Skills:
- 4+ 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.
SpringBoot
Microservice
Spring
Hibernate
NP- Immediate to 15 Days
Location-Bangalore & Hyderabad (Post pendami)
Role / Purpose - Lead Developer - API and Microservices
Must have a strong hands-on development track record building integration utilizing a variety of integration products, tools, protocols, technologies, and patterns.
- Must have an in-depth understanding of SOA/EAI/ESB concepts, SOA Governance, Event-Driven Architecture, message-based architectures, file sharing, and exchange platforms, data virtualization and caching strategies, J2EE design patterns, frameworks
- Should possess experience with at least one of middleware technologies (Application Servers, BPMS, BRMS, ESB & Message Brokers), Programming languages (e.g. Java/J2EE, JavaScript, COBOL, C), Operating Systems (e.g. Windows, Linux, MVS), and Databases (DB2, MySQL, No SQL Databases like MongoDB, Cassandra, Hadoop, etc.)
- Must have experience implementing API Service architectures (SOAP, REST) using any of the market-leading API Management tools such as Apigee and frameworks such as Spring Boot for Microservices
- Should have Advanced skills in implementing API Service architectures (SOAP, REST) using any of the market-leading API Management tools such as Apigee or similar frameworks such as Spring Boot for Microservices
- Appetite to manage large-scale projects and multiple tracks
- Experience and knowhow of the e-commerce domain and retail experience are preferred
- Good communication & people managerial skills
*) 7+ years of strong experience in Java/J2EE technologies (Core Java, Spring, Springboot, Hibernate, JPA, Microservices)
*) Experience with working on Java 8.0 and its emerging road map for 11
*) Hands on experience in Springboot and good knowledge of MySQL, MongoDB
*) Hands on experience in working with Angular 6 and above. Experience working with product management and UI/UX designers having knowledge of advanced Javascript, JQuery
*) Working knowledge on components, modules, data/event bindings, templates, using and creating directives, writing routes, services, forms and models
*) Solid understanding of the full frontend and backend development life cycle
*) Strong experience in Spring Framework (Spring MVC, Spring security, Spring data, OAuth)
*) Experience with Webservices (SOAP and REST) and API integration. Good knowledge of JSON and Swagger and Postman is required
*) Experience with web application servers like Tomcat, Jetty, JBoss. Knowledge of Kafka with MQTT would be an added advantage
*) Experience with TDD, code testability standards, JUnit
*) Experience in managing configurations and deploying and hosting applications in AWS
*) Experience with DevOps tools like Git, Maven, SourceTree, Jenkins, Docker and CICD model of development
*) Good experience of OOPS, algorithms, data structures, multi-threading, design patterns and industry best practices
*) Must have good understanding in SOLID principles and why design principles are used.
*) Experience with Eclipse/IntelliJ and VS Code
● A Bachelor’s degree in Computer Science or equivalent combination of technical education and
work experience
● 5 to 9 years of Software Development experience
● Experience in system design, distributed systems, relational and No-SQL databases.
● Strong, object-oriented design and coding skills (C/C++ and/or Java preferably on a UNIX or Linux
platform)
● Solid software development background including design patterns, algorithms, data structures,
test driven development
● Any previous experience in working with Big Data or leveraging machine learning in improving
consumer experience is desirable.
● Excellent verbal and written communication skills
Job Summary:
- Willingness to work on highly scalable cloud-native solutions based on microservices.
- Quickly learn the technologies and deliver using the same.
- Take complete ownership of the customer requirements.
- Motivated to deliver world-class quality.
- Inclined to bring new ways of thinking, working and providing solutions.
- Drive the concept of quality into everybody and have a zero-tolerance towards bad quality.
- Understand requirements from product management, customer and able to comprehensively break this down to manageable tasks.
Experience:
● 3-9 years of development experience.
Technical Skills:
Mandatory:
- Java - Advanced concepts concurrency, reflection, lambda, Java Springboot, Spring security,
- Actuator/Prometheus/Grafana/Servo (metrics),
- EFK/ELK stack (log analysis)
- OpenAPI/Swagger (documentation)
- RDBMS (PostgreSQL, MySQL, Maria or any other)
- NoSQL (Anyone of Mongo DB, Redis, Cassandra, Neo4J or other DBs)
- Automated unit tests/e2e tests (JUnit, TestNG, RestAssured etc)
- CI/CD pipelines (Jenkins, Sonar, Maven/Gradle etc)
Optional: (But highly recommended)
- NewSQL DB (TiDB, CockroachDB)
- AMQP/RabbitMQ
- Kafka
- Docker
- Kubernetes










