
Job Requirements for Java Developer Roles
* Strong hands-on expertise in Java programming.
* In-depth understanding of Java garbage collection mechanisms and their impact on application performance.
* Ability to write clean, efficient, and maintainable code.
* Familiarity with best practices for performance optimization.
* Strong problem-solving skills and attention to detail.
Please note that you will have to attach the following documents after Round 1 that will be needed for the client submission:
- LWD confirmation
- PF service history
Mode of work: Hybrid weekly 3 Times.
While you may already know about Wissen and the company history, here is a quick rundown for you.
About Wissen Technology:
• 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. We help clients build world class products.
• Our workforce consists of 550+ 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 has grown its revenues by 400% in these five years without any external funding or investments.
• Globally present with offices 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.
• Wissen Technology has been certified as a Great Place to Work®.
• Wissen Technology has been voted as the Top 20 AI/ML vendor by CIO Insider in 2020.
• Over the years, Wissen Group has successfully delivered $650 million worth of projects for more than 20 of the Fortune 500 companies.
We have served client across sectors like Banking, Telecom, Healthcare, Manufacturing, and Energy. They include likes of Morgan Stanley, MSCI, StateStreet, Flipkart, Swiggy, Trafigura, GE to name a few.
Website : www.wissen.com

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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• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
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• 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.
- Proven experience in any high-level programming languages like Java (Preferably)
- Strong knowledge of data structure, algorithms and coding
- Experience with any Messaging technologies like Kafka or Rab-bitMQ, etc.
- Proven experience in database technologies like NoSQL
- Hands-on experience with Spring, Spring Security, Spring boot, and Hibernate framework.
- Working knowledge of developing Restful Micro services.
- Strong analytical, problem-solving skills.
- Attend team meetings to discuss projects, brainstorm ideas, and put forward solutions to any issues.
- Ability to understand the Platform/domain of the business in detail & Ability to multi-task.
- Good communication and organizational skill
We are looking for a Senior Node.js Developer responsible for managing the interchange of data between the server and the users. Your primary focus will be the development of all server-side logic, definition and maintenance of the central database, and ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well. Collaborate with front-end and back-end developers and designers to build website following client requirements.
Responsibilities
- Create clear, simple, and reusable code
- Develop all server-side logic, including data storage to optimize website performance
- Identify programming bottlenecks and bugs and find fixes
- Test, update and validate web applications to be used on different web browsers
- Execute automated testing platforms and system tests
- Familiarity with front-end technologies
- Attention to detail, especially in identifying and fixing errors.
Required Skills
- 3+ Years of experience in back-end development
- Knowledge and experience in Node js and Mongo DB
- Experience in Microservices Architecture
Role- Software Development Engineer-2
As a Software Development Engineer at Amazon, you have industry-leading technical abilities and demonstrate breadth and depth of knowledge. You build software to deliver business impact, making smart technology choices. You work in a team and drive things forward.
Top Skills
- You write high quality, maintainable, and robust code, often in Java or C++ or C#
- You recognize and adopt best practices in software engineering: design, testing, version control, documentation, build, deployment, and operations.
- You have experience building scalable software systems that are high-performance, highly-available, highly transactional, low latency and massively distributed.
- Roles & Responsibilities
- You solve problems at their root, stepping back to understand the broader context.
- You develop pragmatic solutions and build flexible systems that balance engineering complexity and timely delivery, creating business impact.
- You understand a broad range of data structures and algorithms and apply them to deliver high-performing applications.
- You recognize and use design patterns to solve business problems.
- You understand how operating systems work, perform and scale.
- You continually align your work with Amazon’s business objectives and seek to deliver business value.
- You collaborate to ensure that decisions are based on the merit of the proposal, not the proposer.
- You proactively support knowledge-sharing and build good working relationships within the team and with others in Amazon.
- You communicate clearly with your team and with other groups and listen effectively.
Skills & Experience
- Bachelors or Masters in Computer Science or relevant technical field.
- Experience in software development and full product life-cycle.
- Excellent programming skills in any object-oriented programming languages - preferably Java, C/C++/C#, Perl, Python, or Ruby.
- Strong knowledge of data structures, algorithms, and designing for performance, scalability, and availability.
- Proficiency in SQL and data modeling.
About Amazon.com
“Many of the problems we face have no textbook solution, and so we-happily-invent new ones.” – Jeff Bezos
Amazon.com – a place where builders can build. We hire the world's brightest minds and offer them an environment in which they can invent and innovate to improve the experience for our customers. A Fortune 100 company based in Seattle, Washington, Amazon is the global leader in e-commerce. Amazon offers everything from books and electronics to apparel and diamond jewelry. We operate sites in Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Mexico, Netherlands, Spain, United Kingdom and United States, and maintain dozens of fulfillment centers around the world which encompass more than 26 million square feet.
Technological innovation drives the growth of Amazon, offering our customers more selection, convenient shopping, and low prices. Amazon Web Services provides developers and small to large businesses access to the horizontally scalable state of the art cloud infrastructure like S3, EC2, AMI, CloudFront and SimpleDB, that powers Amazon.com. Developers can build any type of business on Amazon Web Services and scale their application with growing business needs.
We want you to help share and shape our mission to be Earth's most customer-centric company. Amazon's evolution from Web site to e-commerce partner to development platform is driven by the spirit of invention that is part of our DNA. We do this every day by inventing elegant and simple solutions to complex technical and business problems. We're making history and the good news is that we've only just begun.
About Amazon India
Amazon teams in India work on complex business challenges to innovate and create efficient solutions that enable various Amazon businesses, including Amazon websites across the world as well as support Payments, Transportation, and Digital products and services like the Kindle family of tablets, e-readers and the store. We are proud to have some of the finest talent and strong leaders with proven experience working to make Amazon the Earth’s most customer-centric company.
We made our foray into the Indian market with the launch of Junglee.com, enabling retailers in India to advertise their products to millions of Indian shoppers and drive targeted traffic to their stores. In June 2013, we launched http://www.amazon.in">www.amazon.in for shoppers in India. With http://www.amazon.in">www.amazon.in, we endeavor to give customers more of what they want – low prices, vast selection, fast and reliable delivery, and a trusted and convenient online shopping experience. In just over a year of launching our India operations, we have expanded our offering to over 18 million products across 36 departments and 100s of categories! Our philosophy of working backwards from the customers is what drives our growth and success.
We will continue to strive to become a trusted and meaningful sales and logistics channel for retailers of all sizes across India and a fast, reliable and convenient online shopping destination for consumers. For us, it is always “Day 1” and we are committed to aggressively invest over the long-term and relentlessly focus on raising the bar for customer experience in India.
Amazon India offers opportunities where you can dive right in, work with smart people on challenging problems and make an impact that contributes to the lives of millions. Join us so you can - Work Hard, Have Fun and Make History.
We are hiring for a Software Engineer Team Lead - Backend, to join our education-focused fintech lending startup, GrayQuest. Our core product is a combination of a lending product, a rewards product and an insurance product to redefine the education fees payment across the country.
You will be joining a young and vibrant team of developers who are pushing the boundaries of consumer financing through technology.
Key Responsibilities :
- Participate in all stages of the Software Development Lifecycle
- Develop back-end components, services, and APIs. Support integration of user-facing elements, and collaborate closely with the design and front-end development team.
- Write elegant, effective, and scalable code while maintaining the highest level of coding standards.
- Take complete ownership of projects and ensure timely deliveries
- Ability to debug, refine, review, and deploy code
- Work closely with the QA team to test, and document project features.
- Ability to interact with all stakeholders. Understand business requirements, and effectively convert them into technical specifications
- Mentor junior developers and participate in peer Review
Requirements:
- Demonstrable experience as a Python Developer (3+ years)
- Strong knowledge of Python frameworks (Django Rest, Flask)
- Experience working on REST APIs
- Strong knowledge of SQL and JavaScript
- Experience with Amazon Web Services (AWS)
- Working knowledge of React
- Familiarity with Agile development methodology
- Good understanding of task breakup, milestone definition, and work delegation.
- Past experience of working in a fintech/financial services domain or a consumer internet startup will be preferable but not required
- Work experience in early-stage startups (0 ->1) is a big plus
- Bachelors or equivalent degree from premier institutes is a plus
- Most importantly, the biggest skill we look for our prospective candidates is "Learnability" - how quickly can you learn.
Why is this a great opportunity for the right candidate:
- Work with a young dynamic core team backed by marquee investors from the financial services space
- Work on a product/business that has achieved product market fit and take it to scale
- Equity compensation and competitive market salaries
- Work environment that prioritizes talent, hustle and dedication
We will also ensure we give a preference to applicants who directly email us with their background/context and why they think they should be a strong candidate for this position at GrayQuest. Email us at work (at the rate) grayquest (dot) com and cc Sonal (at the rate)grayquest (dot) com
- Provide objective guidance without personal or political considerations.
- Pitching ideas for projects based on gaps in the market and technological advancements.
- Rolling out fixes and upgrades to software, as needed.
- Securing software to prevent security breaches and other vulnerabilities.
- Setting up a continuous build environment to speed up software development and deployment process.
- Architecting overall, comprehensive, and efficient practices.
- Guiding developers and operation teams in case of an issue.
- Monitoring, reviewing, and managing technical operations.
Requirements:
- Degree in Computer Science, Information Systems, or related field.
- Previous experience working on a 24x7 cloud or SaaS operation team.
- Spring Boot Java 8, Spring Core, Spring Boot, Spring MVC, Swagger, Tomcat 8, Maven, Jenkins, SVN, GIT, Postman/Newman, RESTful Services, Containers.
- Experience with infrastructure management and monitoring.
- Proven in developing, implementing, and providing solutions to the given problem in all Java technologies.
- Proficient in stitch-together end-to-end application starting from front-end web development, back-end development, middleware integration, and persisting data in no SQL or DBMS databases.
- Ability to work independently and as part of a team.
- Well versed in Core Java, OOPs concepts, collections, multi-threading, concurrency, lambdas, and streams.
- Hands-on knowledge of Spring Core, MVC, JPA, Security, transaction
- Working knowledge of REST API designing as well as development, using Spring.
- Exposure to Spring Boot, Docker, Kubernetes, OpenShift for the microservices environment.
- Savvy with SQL and database concepts.
- Ability to use frameworks like JUnit, Mockito, etc., for implementing unit testing.
- Sound understanding of code versioning tools, such as Git/bit bucket with Maven.
- Should have worked in a CI/CD environment with TeamCity/Jenkins.
We’re looking for a Senior Backend Engineer to help us build the tools, services, and applications that will enable us to be the planet’s most patient-focused pharmacy. You will work on projects ranging from greenfield initiatives to matured products with an active user base.
What you’ll do:
- Collaborate with engineering team to design and implement products using event driven micro-services architecture.
- Interact with Product Managers and key stake-holders on regular basis to understand and execute Product vision.
- Take charge of end-to-end feature development, right from proof-of-concept to production deployment and support
- Brainstorm and lead continuous improvement projects for product
- Providing feedback to peer developers on code quality and development standards.
- Mentoring team on strong coding and design standards.
- Setting the bar high for development practises while striking the right balance between pragmatism and perfection for code and processes.
- Effectively document API's and services using Swagger/OpenAPI, visualize flow and dependencies using diagrams, and create technical documents on engineering wikis.
- Present crisp and clear feature demos to stakeholders.
Some of our opensource projects- https://meet.google.com/linkredirect?authuser=0&dest=https%3A%2F%2Fgithub.com%2Fmedly">https://github.com/medly
Your tool-belt:
We don’t expect anybody to be an expert on all of these, but you should be deeply familiar with some, and a self-starting learner who isn’t afraid to ask for help:
- Polyglot Development (at least 1 more lang apart from Java and JavaScript)
- At least one JVM language
- Functional Programming,
- OO Design, Clean Code, SOLID principles
- Solid grasp on HTTP, and REST
- Web based SaaS product development
- Deployment to AWS or any cloud
- Test Driven Development,
- Security Compliance like HIPAA, PCI-DSS, SOC2
- Git, Linux, CI/CD, Gradle, IDEA
- Security based on OAuth2 / OIDC
- SQL and NoSQL DBs like PostgreSQL, DynamoDB, ElasticSearch
- Docker
- SQL Migration tools like Liquibase, Flyway
- Semantic Versioning, Feature Toggles, PR, Feature Branches
What you`ll need:
- 3+ Years of experience mainly on Backend Development using any two languages (Java, Kotlin, NodeJS, Ruby etc.)
- Minimum a bachelor degree in Computer Science, Engineering or any related field.
You will work on the following:
- Develop service/APIs using Kotlin/Micronaut Node/Serverless
- Aurora Serverless PostgreSQL DB
- AWS, Lambda, API Gateway, Amplify, Cognito, Okta
- Github, Github Actions, SonarCloud
- Database versioning using tools like Liquibase
- Terraform to manage infra
- Cloudwatch/AWS X-Ray to monitor the infra
- Opportunity to make Open Source Contribution
- At least 2-5 years of working experience in web services, preferably in Python
- Should have built and released APIs in production
- Experience working with RDBMS and NoSQL databases
- Designing thoughtful, extensible data models
- Knowledge of identifying, defining and building micro-services
- Working knowledge of GCS, AWS, Azure or any other cloud provider
- Aggressive problem diagnosis and creative problem-solving skills
- Good communication skills - written and spoken











