
- Core Java 5.0 and above
- Extensive experience in developing enterprise-scale n-tier applications for the 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.
- Strong written and oral communication skills.
- Should have the ability to express their design ideas and thoughts.

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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About OJ Commerce:
OJ Commerce is a fast-growing, profitable online retailer based in Florida, USA with a full-fledged India office based in Chennai driven by a sophisticated, data-driven system to run the operations with virtually no human intervention. We strive to be the best-in-class ecommerce company delivering exceptional value to customers by leveraging technology, innovation and brand-partnerships to provide a seamless & enjoyable shopping of high-quality products at the best prices to our customers.
Responsibilities:
Work with business-stakeholders to understand requirements, prototype, build and deploy it.
CRUD the backend code you own keeping maintenance, performance and security in mind.
Keep up breast of latest technologies and its ecosystem and adopt ones that aid safe product delivery at speed.
Automate the boring and mundane stuff for you prefer to be productive than being busy.
We are flat. Be responsible for professional growth of self and the team.
- Tune application for performance.
- Take initiatives and manage change to work towards business goals at speed without compromising safety.
- Coach full-stack developers on backend skills.
- Provides problem resolution support, specific to application issues, identifies and resolves problems in application software, determines symptoms and ensures accurate problem definition
Develop functional, architectural and other documentation as required for productive functioning of teams.
- Be the brand ambassador for OJ Commerce by speaking at meetups, conferences, etc.
- We are fluid. Be ready for changing dynamics in responsibilities from time to time. Exciting isn't?
- Take the lead in digital transformation of legacy applications.
What you need to shine?
- You have the prior experience in modernising legacy applications.
- You are a passionate hands-on developer with deep experience in building enterprise grade software in Microsoft ASP.NET Core, ASP.NET MVC, Web API, SOA, Micro-Services and RESTful Services with knowledge of SQL Server database.
- You have the ability to see and work on the big picture (Application Architecture) and devilish details (Complex Code).
- Strong experience in developing web applications using C#, VB.Net, .NET, LINQ, Net Framework 4.0, MVC 3/4/5, ASP.NET Web API, .Net Core etc.
- You are Cloud savvy, preferably Google Cloud.
- You have rich experience in Object-Oriented Programming (OOP) with good knowledge of practical design-patterns and its applications.
Hands-on experience in building SOA or Micro-services preferably on .NET Core.
Proven Architectural skills with high standards in Code quality
Knowledge of ReactJS/Typescript would be added advantage.
Practical experience in Agile development methodologies of using CI/CD.
Extreme Programming (TDD) experience is sought after by us.
What we Offer
- Greenfield opportunity to transform legacy backend applications to latest technology stack.
- Fast-paced start-up environment: This is not for the faint hearted; you need grit and passion as much as you need the core skills.
- Work in an interdisciplinary team where learning from one another and developing solutions cross-functionally is a key part of our culture.
- Golden opportunity to make history by making big business impact.
- Competitive salary to take good care of self and family.
- Insurance Benefits: Medical and Accident cover.
- Flexible Working Hours
Position Summary
We are looking for a Software Engineer to join our creative team of UI designers and developers. You will work with a team of experts in user experience, design, web application backend and frontend development.
As a Software Engineer, you will implement easy-to-use and scalable web applications offering creative solutions to configure, monitor, and visualize new generation edge computing services. You will vet various open source and close source technologies, components, libraries, tools, etc. and help build a scalable, highly available, and easily manageable system
Responsibilities:
-
Architect and design intelligent web applications that serves the diverse requirement of edge computing solutions
-
Code while considering performance, scalability, maintainability, and flexibility
-
Innovate on features to deliver simple and intuitive usage for provisioning, monitoring, information visualization, debugging, and big-data analysis
-
Collaborate with architects, UX designers, and product managers to build a delightful user experience
-
Chip in to design end-to-end system architecture, working with different technical teams
-
Learn and apply new technologies, best design practices and usability patterns
-
Share the knowledge with code reviews and suggestions to ensure quality of product according to standards, processes and procedures.
Knowledge, Skills and Abilities
-
At least 3 years of experience with JavaScript
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At least 2 years of experience with Typescript and Angular
-
Strong knowledge of HTML5, CSS3, and SASS/SCSS
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Deep understanding of e2e testing and test automation of web applications
Qualifications
-
At least 3 years of experience and BS/BA or MS in Computer Science/related field or equivalent work experience.
ROLES AND RESPONSIBILITIES
- Proven working experience in backend app development and experience with Node JS.
- Build advanced ecommerce backend applications for the multiple client platforms (both React and Android).
- Understanding of design principles and good architecture patterns.
- Proper Data Structures and Algorithm knowledge is a must.
- Graph QL and Apollo Server knowledge.
- Collaborate with cross-functional teams to define, design, and ship new features. Work with outside data sources and APIs like the one of Unicommerce.
- Create Unit-test code for robustness, including edge cases, usability, and general reliability.
- Work on bug fixing and improving application performance.
- Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
- Translate designs and wireframes into high quality code.
- Have a good understanding of CI/CD tools (any).
- Robust knowledge of popular databases like MongoDB, Elastic Search, DynamoDB, Redis etc;
- Knowledge about AWS Services like EC2, Lambda, Kinesis, Redshift, S3 is super plus.
CANDIDATES MUST HAVE
- Node JS.
- Data Structures and Algorithm
- HTML5 and CSS3
- Graph QL and Apollo Server
- MongoDB, Elastic Search, DynamoDB, Redis
- AWS Services like EC2, Lambda, Kinesis, Redshift, S3
REQUIREMENTS
- Bachelor's degree in computer science, information science, or similar.
- Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
- Knowledge of front-end technologies such as HTML5 and CSS3.
- Superb interpersonal, communication, and collaboration skills.
- Exceptional analytical and problem-solving aptitude.
- Great organisational and time management skills.
- Availability to resolve urgent web application issues outside of business hours
Responsibilities
- Writing clean, high-quality, high-performance, maintainable code
- Develop and support software including applications, database integration, interfaces, and new functionality enhancements
- Coordinate cross-functionally to insure project meets business objectives and compliance standards
- Support test and deployment of new products and features
- Participate in code reviews
Skills & Qualifications
-
4-12 years of experience in Java Development.
-
Excellent verbal and written English communication is a must. You may have to interact with clients directly.
-
Technology agnostic approach is a must. Ready to adopt new technology and a faster learning curve.
-
Writing scalable, maintainable and reusable code.
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Keen interest in SAAS based products and mobile applications.
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Experience working with Distributed Systems
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Java, Spring Boot, Microservices, API Design Experience with Event-Driven Architecture, Multithreading
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Kafka iOS Experience with Event Sourcing Reactive and Functional
-
Programming Strong understanding of best practices for creating/working with Microservices
-
Experience implementing Message Brokers and Messaging subsystems(experience working with Kafka a strong plus)
-
Be open-minded, creative, and self-critical; be collaborative and communicative
-
Have experience with and curiosity about agile and lean philosophies
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Experience working with small teams to ship products to market
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Have experience developing full-service consumer, employee and business applications
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Language agnostic and experienced polyglot Passion for Working Software and SOLID principles
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Experience with designing and refactoring complex systems
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Experience with Test-Driven Development (TDD) Interest in working in a pair-programming environment Deep understanding of design patterns and applying them in production environments
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Passion for enabling team members
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Java 8 or Java 11. Both are LTS. The project will be on Java11
-
Spring Boot
-
Git
-
SQL
-
AWS and AWS Aurora
-
Microservices
-
Multithreading
Perks
- Flexible time schedule.
- Work from home or work from anywhere.
- Health insurance.
- Team building activities.
- Training and conference tickets.


• Opportunity to develop game-changing, globally distributed, internet advertising products used by millions worldwide.
• Contribute hands-on, own, collaborate, and deliver new features and services at a fast pace.
• Build platforms, frameworks, APIs, libraries & automated tools to facilitate rapid issue
resolution and development & deployment of new features and changes.
• Own the prioritization, scoping and scheduling processes for new products and features.
• Work with and advise management on technical aspects, make well-informed decisions.
• Improve processes, technology & the applications you own continuously by showing the team better ways of doing things and help improve skills in the team.
• Prioritize tech-debt and ensure the platforms and applications meet the latest industry
standards.
• Learn new technology & practices, coach the team and conduct training sessions – devote time for learning and continuous improvement of self and team.
• Imbibe and maintain a strong customer service-oriented attitude while designing and building products.
Who should apply for this role ?
• 5 - 9 years of experience in building or managing large scale distributed systems
• BS/MS degree in Computer Science or other relevant majors
• A track record of working on scalable applications, preferably at a major internet property or well-known startup
• Good grasp on programming fundamentals including OOP, Design Principles and Data Structures
• Excellent analytical, logical, and problem-solving skills
• Solid knowledge of Java/Python/Golang, web services (REST/JSON), NoSql Databases,
Kafka/Kinesis/Spark, Elasticsearch/Solr/Kibana
• Can exhibit passion and enthusiasm for remarkable technology (Knowledge and contribution to open source projects, Active Blog, etc. is a plus)
• Ability to learn emerging technical/business standards and apply/coach development team in proper adoption
• Deep understanding of development processes and has personally contributed to critical
product cycles
• Communicate effectively & cross-functionally with other teams
- Should be comfortable working in support with development projects
- Experience working on Spring (MVC, Boot, Batch, Security, Data)
- 4-5 years experience in Java-J2EE Development.
- Individual contributor.
- Extensive technical experience and development expertise in Core Java, J2EE.
- Experience working with and applying Design patterns to solve problems.
- Good in development code in Java/J2EE, new oracle query, procedures, functions, design the page, validate of java/Script
- Should be able to identify, track and mitigate risks to the product.
Building highly-scalable and secure payments platform
Primary owners of one or more components of the platform and will drive innovation in
your area of ownership
Working with various product teams gathering requirements and adding capabilities
Working with some of the smartest people in the industry and will have ample opportunity to learn and grow
Using cutting-edge cryptography to secure payments beyond industry standards
Deriving actionable insights by mining TBs of data
Building a low-level infrastructure that aims to push the boundaries of network
performance
Participating actively in recruitment and nurturing of engineers as awesome as you
What do we look for?
Review and influence new evolving design, architecture, standards and methods with
stability, maintainability, and scale in mind
Identify patterns and provide solutions to class of problems
Research, evaluate and socialize new tools, technologies, and techniques to improve the value of the system
Be able to multitask, prioritize and handle dependencies with minimal oversight
From a technology perspective, you should have the knowledge and/or experience in a
reasonably sized subset of the following ( the more, the merrier!! )
Worked on one or more large scale java applications
Good understanding of nuances of distributed systems, scalability, and availability
Good knowledge of one or more relational and NoSQL databases and transactions
Shrewd focus on latency and throughput of services
In-depth understanding of concurrency, synchronization, NIO, memory allocation and GC
Experience with IaaS clouds like AWS/Google Cloud, Azure, OpenStack etc..
Experience in working with Message Brokers and Application Containers
Great ability to mentor and train other team members
Job Description:
We are looking for a Java Developer with experience in building high-performing, scalable,enterprise-grade applications.
You will be part of a talented software team that works on mission-critical applications. Java
developer roles and responsibilities include managing Java/Java EE application development
while providing expertise in the full software development lifecycle, from concept and design to
testing.
Responsibilities and Duties
• Contribute to all phases of the development lifecycle
• Write well designed, testable, efficient code
• Ensure designs should follow compliance with specifications
• Prepare and produce releases of software components
• Support continuous improvement by investigating alternatives and technologies and
presenting these for architectural review
Qualifications
• BS/MS degree in Computer Science, Engineering, or a related subject
• Minimum 2 to 6 years of software development experience
• Proven hands-on Software Development experience
• Proven working experience in Java development
• Hands on experience in designing and developing applications using Java EE
platforms
• Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2,
Hibernate)
• Experience in the Spring Framework
• Very good English communication skills
• Optional:
o Good to have the knowledge of Angular JS framework.
o Experience to work on the Microservice architecture.
o Experience to work with Git hub & bitbucket.
o Agile methodology.

Years of Exp : 4 - 8yrs
Job Location: Mumbai/Bangalore
Job description:
We are looking for a Sr. Back end web developer/Lead passionate towards building high
performance web applications which can scale for B2C businesses. We are looking for
self-driven individuals who love to find innovative solutions and can perform under pressure. An eye for details and being proud of produced code are the must have attributes for this job.
Responsibilities.
●You will be responsible for converting Product team requirements to modular, testable and efficient code.
●You will be required to design and implement data storage solutions (Databases, caching
layers etc).
●You will also be required to cater to NFRs related to security and performance.
Skills
●At least 5 years of experience in working on NodeJS/Java/Ruby
●Proficiency in RDBMS such as MySQL/PostgreSQL.
●Experience of building/deploying applications on AWS is a definite advantage.
●Familiarity with some ORM (Object Relational Mapper) libraries like Sequelize is required.
●Experience in some NoSQL databases (e.g. DynamoDB/Elasticsearch/Redis Cache etc) is a definite plus.
●Good understanding on architectural patterns (e.g. MVC) is required.
●Good communication and analytical skills are the basic needs for this role.
●An urge to create awesome applications that people will enjoy using is a must.
●Other technologies : MySQL , Redis, AWS, Microservices, REST API .
●Knowledge of Javascript is preferable.
●AWS or some cloud experience.
●Should have built web application technology.
●Should have understanding of DevOps and Database.
●Should have done application performance tuning.
Qualification:
●Engineering graduates from Tier I or II institutes.
●B.E/ B.Tech/ MCA/ ME/ M.Tech

