
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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Job Title: Java Developer
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. - 4 to 14 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 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.
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 hassuccessfully 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.

Responsibilities
- Design and build highly reliable, scalable and performant infrastructure for media heavy workflows.
- Own large technical deliverables and execute in a structured manner.
- Take the accountability of the overall health of the infrastructure you build.
- Platformize components as libraries, utilities and promote reuse.
- Be able to conceptualize and develop prototypes quickly.
- Lead by example, mentor and guide team members on everything from structured problem solving to development of best practices.
Requirements
- 4 to 10 years of industry experience in software engineering with at least 4 years in Video, Audio & Image processing and streaming technologies.
- Deep expertise with various codecs, compute efficiency, streaming protocols and network topologies for media heavy workflows.
- Deep understanding of your tools: Languages, frameworks, libraries and systems.
- Experience with abstracting requirements into frameworks.
- Hungry to learn, share knowledge, and enjoy mentoring others.
- Data driven, having customer empathy, striving to build best of class, performant services.
In this role, you will be responsible for building world-class technology products and platforms that are at the forefront of the technology revolution in the Indian healthcare ecosystem. You are someone who insists on the highest standards for quality, maintainability, and performance.
REMOTE JOB
Senior Back-end Developer
You will be responsible for working closely with our engineers to ensure system consistency and improve user experience. Ultimately, you should be able to develop and maintain functional and stable web
applications to meet UAS technology requirements.
Responsibilities
• Develop, troubleshoot, and debug applications.
• Manage cutting-edge technologies to improve legacy applications.
• Collaborate with Front-end developers to integrate user-facing elements with server-side logic.
• Gather and address technical and design requirements.
• Provide training and support to internal teams.
• Build reusable code and libraries for future use.
• Liaise with developers, designers, and system administrators to identify new features.
• Follow emerging technologies.
• Teamwork skills with a problem-solving attitude
• Excellent analytical and time management skills
Requirements
• Have 5+ years solid expertise in building enterprise-level Node.js Applications with a strong
knowledge in the following related technologies & frameworks: Javascript, Typescript, Express.JS,
Nest.JS, Loopback, Sequelize, Socket.io.
• Write clean, testable, and reusable code using TDD, with hands-on experience working in both
Monolith and Microservices architecture.
• Experience working with Unit Testing frameworks: Mocka, Chai, Istanbul
• Solid expertise in database technologies and ORMs including Sequelize, MySQL, MongoDB, Redis
• Proficient understanding of code versioning tools, such as Git/GitFlow and SourceTree
• Experience setting up your own CI/CD pipelines
• Experience working with communication protocols like (Websockets, gRPC, XMPP)
• In-depth understanding of the entire web development process (design, development, and
deployment)
• Hands on experience with other programming languages like Java, Ruby, PHP and Python with
sufficient knowledge in using 3rd party packages/plugins
• Familiarity with front-end languages (e.g. HTML, JavaScript and CSS)
• Familiarity working with popular cloud providers like Azure, AWS
• BSc degree in Computer or in relevant field
Experience: 3-5 yrs
Max budget: 10-15 LPA
Location: Dubai (covering all expenses along with CTC)



1. Work experience between 3 years to 9 years in building large scale high user traffic consumer facing applications with desire to work in a fast paced startup.
2. Knowledge on reactive and asynchronous programming is preferable. If you have worked with coroutines, goroutines, high concurrency or optimized number of threads for processing on your backend server you could be a good fit.
3. Extremely proficient at writing performant, scalable and production ready code in Kotlin, Java (8 or above, comfortable with concepts like lambda, streams, multithreading etc), Elixir, Rust, or Golang. Should be familiar with static code analysis, code coverage and code reviews.
4. Experience with NoSQL DBs like MongoDB, Cassandra, Redis or Aerospike is required. Knowledge of graph DBs like Neo4j is preferred.
5. Strong in algorithms, problem solving and data structures.
6. Knowledge of TDD and experience with building applications integrated with CI-CD pipelines (automated build, tests and deployments).
7. Exposure to micro-services with good understanding of containers, kubernetes, logging, alerting and monitoring. Inter services communication. Should know how to handle multiple versions of APIs.
• Experience working with SQL databases, query optimisation and designing schemas
• High coding standards - understanding of test coverage best practices & test pyramid concept.
• Design, analyze, code, test, and deploy applications to satisfy business requirements for large, complex projects.
The right candidate will have strong development skills, the ability to learn new programming skills and tools quickly and independently, and strong verbal and written communication skills.
The developer will be responsible for new design and development
Technical Skills:
• Strong experience using Eclipse IDE.
• Working experience with Spring Boot, Hibernate, XML, Log4J and JDBC is required.
• Experience with Restful Webservices is a must.
• Experience with AngularJS is a plus.
• Experience with Oracle database is a plus.
• Experience with BPM workflow is a plus.
• Ability to interpret and understand database schemas to ensure database integrity.
• Working experience with Multi-tier environment involving Windows and UNIX servers.
Minimum Requirements:
• 6 Month to 3 years of experience in java/J2EE
• Worked in a product startup or a product company
• Exposed to Agile development methodologies
• Working experience with various modules of Spring ( MVC, JPA) is a must
• Understanding of Java/j2ee patterns, coding standards and best practices.
• 6 Months of experience with all phases of Systems Development Life Cycle (SDLC).
• Demonstrated ability to work in a team environment and multitask to meet critical deliverable dates.
• Must strive for results.
• Ability to work as team player in medium to large team environments.
Additional Knowledge & Skills:
• Strong analysis/problem solving experience to deal with complex business problems.
• Demonstrated ability to work in a team environment to meet critical deliverable dates.
• Excellent communication, presentation, and writing skills.
• Excellent interpersonal skills and organizational skills.
• Must be a detail oriented, analytical and an independent thinker.
• E-Commerce experience is a plus.
• Experience working in SVN, Jira is a plus."

