
Job Title: Java Developer
Experience: 5 –14 Years
Location: Mumbai / Bangalore
Employment Type: Full-time
We are looking for experienced and passionate Java Developers with strong expertise in Core Java, multithreading, and performance tuning. You will be responsible for designing and developing high-performance, scalable, and resilient backend systems. This is an exciting opportunity to work on complex, enterprise-level systems and modern architectures like microservices and event-driven frameworks.
• 5–10 years of hands-on experience in Java (8 or above) development.
• Strong foundation in OOPs, data structures, algorithms, and design patterns.
• Deep understanding of multithreading, concurrency, and synchronization techniques.
• Experience with Spring Boot, Spring MVC, JPA/Hibernate.
• Good working knowledge of RESTful API development.
• Proficient in SQL and experience with relational databases like MySQL, PostgreSQL, etc.
• Familiarity with Git, Maven/Gradle, and CI/CD pipelines.
• Exposure to Agile/Scrum methodology

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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Experience: 8-12 years
Location: Bangalore
Wissen Technology is now hiring for a Senior 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. - 8-12 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 client- facing 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 Us:
At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide.
Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality.
We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more.
Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Whether it’s AI/ML for unstructured data processing, cloud enablement, or data engineering, Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our proprietary Interview Ninja platform ensures we hire the best, building high-performing teams that deliver unmatched results.
Today, Wissen Technology has a global footprint with 2200+ employees across offices in the US, UK, UAE, India, and Australia. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.
Website : www.wissen.com
Overview of the role
As a Node Developer you will be collaborate with cross-functional teams to define, design and build performant modern web applications and services. Build high-quality web applications and services by writing clean and modular code.
Must have skills
- Overall 3-5 Years of experience in writing unit and integration tests to ensure the robustness and reliability of web applications and services.
- Measure and improve the performance of microservices. Catalyse growth within the team through code reviews and pair programming to maintain high development standards
- Investigate operational issues to find the root cause and propose improvements Design, build, and maintain APIs, services, and systems across Stripe’s engineering teams.
- Expert level of experience in the design and development of Web Applications, and highly scalable distributed systems.
- Should have experience in development skills using the latest technologies including NodeJS(fastify framework), Microservices, PostgreSQL, Redis, etc. Should have exposure to NoSQL and SQL development.
- Comprehensive knowledge of physical and logical data modeling, and performance tuning.
- Should possess excellent communication, presentation, and interpersonal skills.
- Ability to work collaboratively and productively with globally dispersed teams.
- Build high-performance teams and Coach teams for successful career growth.
- Experience working with relational and non-relational databases, query optimization, and designing schema
Desired Background
Bachelors/Masters Degree in Computer Science, Information Technology
- Experience in managing medium to large scale application project from beginning to end, with skills in requirement study and functional/detail design, QA, testing, and software change/version control management is advantageous
- Expertise in application development, and familiar with C#, Asp.net, jQuery, Webservice (REST/SOAP), Microservice, WCF
- Basic Equities Trading product knowledge is expected
- Familiarity with Equities/trade processing experience is an advantage
- Strong analytical and problem-solving skill is a must
- Ability to work under pressure, handle multiple tasks and work to tight deadlines.
- High sense of ownership of task assigned, deliver applications with high quality and efficiency.
- Good communication, inter-personnel skills is required
- Team player with strong interpersonal and communications skills
- Looking for 4 – 8 years’ experience in .NET
At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.
Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.
F5 is looking for Software Engineer II with in-depth experience in high scale distributed systems. You will participate in the design and implementation of of our Edge Computing platform that is used to deploy global, scalable and secure applications. Your work includes, but not limited to, Research, design and build highly reliable, available and scalable platforms, API definition, implementation, deployment, operational management, and debugging.
Responsibilities:
- Deliver solutions that will help create, deploy and manage the service components of the platform
- Investigate various open source and close source technologies, components, libraries, tools etc. and help build a highly available, highly scalable and easily manageable system
- Take ownership of software components and deliver a complete product satisfying functional, scale, performance and manageability requirements.
- Hands-on coding in multiple languages while considering performance, scalability, maintainability, and flexibility
- Understanding and exposure to design patterns and coding practices especially as applied to microservices architectures and API design, implementation and management
- Experience in Cloud native providers like MS Azure or AWS or Google Cloud or any major Cloud vendors in the market and their services
- Independently investigate, present options, review and implement completely new functionality
- You will work closely with other development teams, product management, UX, and QA to define and implement a new product offering while ensuring continued functionality.
- Perform code reviews, set coding practices and guidelines within the team
- Ability to implement all phases of a development cycle for a software product from understanding requirements, going through design, development and deploy phases
- Work with geographically distributed teams
Minimum Qualifications:
- Knowledge and experience in highly distributed software systems, ability to understand the nuances and solve problems related to scale, performance and resiliency of such a system
- Experience in programming languages: Golang, Java, Python any objected oriented high level proprietary or open source language with strong programming constructs.
- Good understanding of programming fundamentals & their application to highly scalable web-based systems
- Experience in developing polyglot software using service definition language and framework like gRPC, Thrift, Google Protocol Buffers, OpenAPI etc.
- Must have hands on SQL or No SQL technologies.
- Experience working on CICD methodology and Git based workflow
- Experience in Docker technologies including experience in optimizing Docker image and managing Docker image lifecycle. Experience in orchestration systems like Kubernetes and container technologies like Docker, rkt is a plus
- Excellent written and verbal communication skills
- Strong interpersonal, team building, and mentoring skills
- BS/MS degree in Computer Science or equivalent with 3+ years of software development experience
We are looking for 2 - 10 years experienced Ruby on Rails and VueJS developer responsible for building
applications, including anything from complex groups of back-end micro-services to command line utilities and
data processing scripts. Your primary responsibility will be to design and develop these applications, and to
coordinate with the rest of the team working on different layers of the infrastructure. Thus, a commitment to
collaborative problem solving, sophisticated design, and building quality products is essential.
Key Duties & Responsibilities:
• Design, develop, and implement new modules and APIs for the BEAM Product
• Plan, build and launch features for our products
• Write unit, functional, and integration tests
• Estimate development tasks and meet deadline
• Collaborate with engineering, QA, and product design team members
• Scale our applications as our user base grows
Mandatory Skills & Experience:
Ability to work & develop in Linux environment
• A solid understanding of Ruby
• 5+ years of web application engineering experience with Ruby on Rails, PostgreSQL, HTML, CSS,
JavaScript, Responsive Design, Caching
• 1+ years of experience with a front-end framework (Vue.js & GIT)
• Solid 2+ plus years of web dev experience building web UI/UX interactions.
• 5+ years of experience improving the performance of Ruby on Rails applications with Memcached &
background job processing frameworks (Sidekiq, Resque etc.)
• Hands on experience in deploying applications using AWS Infrastructure using Capistrano automated
deployment.
Must have experience on Java, Spring MVC / Boot, Hibernate / MyBatis
- Must have experience on building large scale application
- Must have experience on RESTful Web-Services
- Must be good in problem solving, Data structures and Algorithms.
- Strong understanding of Web Architectures, E-commerce solutions
- Strong understanding of any MySql / Postgresql
- Strong understanding of any Redis / Memcached / Mongodb / Elasticsearch
- Hands-on experience on GCP / AWS would be an added advantage
- Hands-on experience on Kubernetes / Docker would be an added advantage
- Basic knowledge of version control system like Git / Mercurial / Bitbucket
- Writes well managed and clean codes
Primary Responsibilities
Providing technical expertise for every phase of the project lifecycle—from concept development to solution design, implementation, optimization and support. Interacts with a set of clients (client senior developers and architects) to create technology specifications from business requirements for one of the modules within the project.
Prepares the technical design of the more complex technology components within the module (one or more of client/web presentation tier, server tier, data access and data model, integration component, package function customization).
Assists the architect in articulating the pros and cons of using a certain technology stack or component or design pattern versus another to the clients and project team and drives selection of technologies, designs to come up with the optimal architecture. Drives the performance tuning, re-design and re-factoring for a module.
Contributes to designing and implementing the build, releases process as well as system configuration and deployment characteristics of the application.
4+ years of strong development skills in Java with JDK 1. 8 & above version &
Microservices with Spring boot/ Spring.
Should have strong acumen in Data Structures, Algorithms, problem-solving and Logical/ Analytical skills.
Thorough understanding of OOPS concepts, Design principles and implementation of different type of Design patterns.
Sound understanding of concepts like Exceptional handling, Serialization/ Deserialization and Immutability concepts, etc.
Good fundamental knowledge in Enums, Collections, Annotations, Generics, Auto boxing, etc.
Experience with Multithreading, Concurrent Package and Concurrent APIs Basic understanding of Java Memory Management (JMM) including garbage collections concepts.
Experience in RDBMS or NO SQL databases and writing SQL queries (Joins, group by, aggregate functions, etc.)
Experience with at-least one NoSQL (Any of Cassandra/Couch base/Hadoop), Hands-on experience with JMS
Hands-on experience in creating RESTful webservices and consuming webservices
Hands-on experience with Spring.
Hands-on experience with any of the logging frameworks (SLF4J/LogBack/Log4j)
Experience of writing Junit test cases using Mockito / Powermock frameworks.
Should have practical experience with Maven/Gradle and knowledge of version control systems like Git/SVN etc.
Good communication skills and ability to work with global teams to define and deliver on projects.
Sound understanding/experience in software development process, test-driven development.
About us
Publicis.Sapient, the digital business transformation hub of Publicis Groupe, helps clients drive growth and efficiency and evolve the ways they work, in a world where consumer behavior and technology are catalyzing social and commercial changes at an unprecedented pace. With 17,000 people and over 100 offices around the globe, our expertise spanning technology, data
sciences, consulting and creative, combined with our culture of innovation, enables us to deliver on complex transformation initiatives that accelerate our clients’ businesses through creating the products and services their customers expect.
Role Description: The Java (Spring Boot) Developer would need to have at least 5+ years of experience.
Requirements & Responsibilities:
- 5+ years of experience developing web applications using J2EE.
- 5+ years of experience in Spring Boot.
- Good knowledge of MicroServices.
- Experience working with tools like Git, Maven.
- Expertise developing enterprise-level web applications and RESTful APIs using MicroServices, with demonstrable production-scale experience.
- Working experience in Industry Standard protocols related API Security including OAuth is a must.
- Demonstrate strong design and programming skills using JSON, Web Services, XML, XSLT, PL/SQL in Unix and Windows environments.
- Strong background working with Linux/UNIX environments.
- Strong Shell scripting experience.
- Working knowledge with Oracle, DB2 or Mongo DB databases.
- Passion to stay on top of the latest happenings in the tech world and an attitude to discuss and bring those into play.
- Strong agile/scrum development experience
- Strong collaboration and communication skills within distributed project team
- Excellent written and verbal communication skills
Skills required are Java, microservice,Spring boot, and knowledge of AWS.
Location; Pune.
Job Description
Paytm is looking for hands-on technologists, who will be responsible for architecting & designing new age mobile & web 3.0 products at Paytm.
Key Responsibilities
Incumbent will be architecting our futuristic mobile & web 3.0 products and choose the best
technologies, components and subsystems on different server side tech.
Driving innovations in the product constantly to remain ahead of the curve.
Serve as a thought leader and mentor on technical, architectural, design and related issues.
Proactively identify architectural weaknesses and recommend appropriate solutions.
Balance short-term versus long-term actions, strategic versus tactical requirements, while
continuing to move forward towards the strategic vision.
Collaborate with cross functional teams to solve complex problems and building products
spanning across multiple teams to deliver end-to-end products & features.
Estimates efforts, identify risks, devises and meets project schedules.
Provide functional, design, and code reviews in related areas of expertise with-in team and
cross-team.
Mentor / coach engineers to facilitate their development and provide technical leadership to
them.
Skills required
MS or BS/B.Tech in computer science or equivalent experience from top college.
3+ years of strong software design/development experience in building massively large scale
distributed internet systems and products.
Hands-on experience in Advanced Java/ Node.JS/other backend JavaScript
frameworks, MySQL/NoSQL, golang, etc.
Excellent data structure & algorithm and problem solving skills.
Experience and knowledge of open source tools & frameworks, broader cutting edge
technologies around server side development.
Should be an active contributor to developer communities like Stackoverflow, Topcoder, Github,
Google Developer Groups (GDGs).
Superior organization, communication, interpersonal and leadership skills.
Must be a proven performer and team player that enjoy challenging assignments in a high-
energy, fast growing and start-up workplace.
Must be a self-starter who can work well with minimal guidance and in fluid environment.








