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🧠 Job Description: Senior Java Developer (8+ Years Experience)

Location: Mumbai, India

Employment Type: Full-time, Hybrid mode of working

Company: Wissen Technology

Website: www.wissen.com

🚀 About Wissen Technology

Wissen Technology is a specialized technology consulting firm delivering cutting-edge solutions to global leaders in Banking & Finance, Telecom, and Healthcare. Established in 2015 and part of the Wissen Group (founded in 2000), Wissen has scaled rapidly with impressive impact and recognition.

• 🌍 Offices in US, UK, India, Australia, Mexico, and Canada
• 👥 1700+ Wissen Technology professionals; part of a 4500-strong Wissen Group
• 🏆 Great Place to Work® Certified
• 🧠 Featured as a Top 20 AI/ML Vendor (CIO Insider, 2020)
• 📈 Achieved 400% revenue growth in 5 years (with zero external funding)
• 💼 Delivered $1B+ worth of projects to 50+ Fortune 500 companies

Learn more about our work and thought leadership:

📄 Articles by Wissen | 💼 LinkedIn

About the Role

We are seeking an experienced Senior Java Developer with 8+ years of hands-on expertise in building scalable, high-performance applications. The ideal candidate will have strong fundamentals in Java, OOPS, Multithreading, Spring concepts, and SQL, and will play a key role in designing, developing, and optimizing enterprise-grade solutions.

Key Responsibilities

• Design, develop, and maintain complex applications using Core Java and Spring frameworks
• Apply advanced Object-Oriented Programming (OOPS) principles to deliver clean, modular, and reusable code
• Implement and optimize multithreaded applications for high-performance systems
• Work with SQL databases for efficient data modeling, query optimization, and integration
• Collaborate with cross-functional teams to gather requirements and translate them into technical solutions
• Conduct code reviews, troubleshoot issues, and ensure adherence to best practices
• Mentor junior developers and contribute to technical knowledge sharing within the team
• Ensure application scalability, performance tuning, and security compliance

Required Skills & Qualifications

• Bachelor’s/Master’s degree in Computer Science, Engineering, or related field
• 8+ years of professional experience in Java development
• Strong expertise in Core Java, OOPS, and Multithreading
• Hands-on experience with Spring concepts (Spring Core, Spring MVC, Spring Boot preferred)
• Proficiency in SQL and database design (MySQL, Oracle, PostgreSQL, etc.)
• Solid understanding of software development life cycle (SDLC) and Agile methodologies
• Strong analytical, problem-solving, and communication skills

🌟 Why Wissen?

Join a company that combines start-up agility with enterprise stability. Work alongside some of the brightest minds from institutions like MIT, Wharton, IITs, IIMs, and NITs. Be part of mission-critical projects for Fortune 500 giants, and grow in a culture that invests in your future.

Elocity is a cleantech start-up striving to make the world a better place through technology innovations. We are building a global infrastructure for making the transition to electric vehicles viable, affordable, and sustainable by working closely with the utilities, governments, and public.

Headquartered out of Canada, we are a team of highly specialized domain experts and problem solvers enabling utilities, public and private sector entities to successfully manage the demands of electric vehicle charging and its infrastructure needs to pave the way for electromobility in future.

To know more visit https://elocitytech.com/

Responsibilities:

• Determines technical feasibility of features or solutions by evaluating problem, customer requirements, possible solutions and technology requirements.
• Exercises judgement in prioritizing tasks and selecting methods and techniques for obtaining solutions.
• Create low-level design of modules of a software application through proper documentation and
• diagrams.
• Develops software solutions by studying requirements, clarifying customer/user needs, analysing data
• and processes and following established software development practices and processes.
• Develops proof of concepts for technical evaluation and early customer feedback
• Updates and shares knowledge by studying state-of-the-art development tools, programming
• techniques, and computing technology; reading professional publications
• Networks with internal and external personnel in own area of expertise.
• Skills:
• Good command in JavaScript/TypeScript. Knowledge of Java/Python will be a plus.
• Experience in Debugging/troubleshooting TypeScript code.
• Experience in API development (REST/GraphQL etc)
• Experience in development of Web and Mobile(android/iOS) applications
• Exposure of Parallel and Asynchronous programming
• Experience in writing Unit tests (Jest or any similar framework)
• Should be proficient in relational Database concepts (Postgres etc.)
• Knowledge of Non-relational Databases would be a plus.
• Good Understanding of Object-Oriented Programming Concepts.
• Good Understanding of Design Patterns.
• Good command of Data structures, Algorithms and Complexity.
• Good at problem solving and analytical skills.
• Experience with Source Code Versioning systems (Git etc)
• Understanding of Micro services Architecture would be a plus 

Position Full-Time: Investment Engineering Associate

Specific Responsibilities

The Investment Engineering Associate’s main responsibilities will include supporting the investment team by building technology-based analytical tools. The Investment Engineering Associate will design and maintain workflows vital to the firm’s investment process - this ranges from creating adhoc analysis to information rich dashboard construction. Typical tasks will include web crawler scripting/collection, web application development, programming (including API integrations), and optimal database/library/query management.

Qualifications

• BS or MS in Computer Science, Engineering, or Data Science

• 2+ years of experience • Candidates should have extensive experience with several of the following languages: Python, Ruby, C/C++, Javascript, HTML5, CSS3, SQL, PHP, etc.

• The Investment Solutions Associate should be familiar with Office VBA • Characteristics of the Solutions Associate include: effective communication skills, attention to detail, and strong ethical values

QA Manager (A) 

 ROLES AND RESPONSIBILITIES: 

·       Conducting manual and automated Mobile and Web testing that is well defined, planned, and executed 

·       Responsible for defining the automation framework (such as TestNG, BDD), creating the framework, and automating the test cases independently 

·       Has experience in GitLab for resource management and Jenkins for build creation and CI/CD 

·       Establishing automation QA strategy and best practices to support continuous development and integration 

·       Estimating, coordinating, directing testing for multiple products/projects 

·       Create clear, detailed, comprehensive, and well-structured test plans and automated test cases 

·       Perform and provide guidance/mentoring on API testing using SOAP UI or POSTMAN toolset 

·       Holding and facilitating automation and test case reviews with Agile team members 

·       Liaise with internal teams (e.g., developers and product managers) across multiple time zones to identify system requirements 

·       Stay up to date with new testing tools and test strategies 

Required Skills & Exp: 

·       8+ Years of Overall Experience in Software testing across different domains 

·       6+ years of automation experience in building and maintaining test automation frameworks within the Agile framework. 

·       Is well-versed with working in an agency environment with strong experience in Automation and Manual testing 

·       Has mandatory extensive exposure of testing Mobile Apps (iOS and Android) including relevant exposure of testing websites using Selenium (for web) and Appium (for mobiles) 

·       Strong knowledge of software QA methodologies, tools, and processes 

·       Has experience testing API’s and building automation test suites 

·       Experience in writing clear, concise, and comprehensive test plans and test cases 

·       Solid knowledge of SQL 

·       Experience working in an Agile/Scrum development process 

·       Experience with performance and/or security testing is a plus 

·       Excellent English, written, and verbal communication skills 

·       Effectively meet deadlines and troubleshoot issues while handling multiple priorities 

·       Strong problem solving and analytical skills with attention to detail 

·       Strong team player, willing to learn, and share experience/mentor with other team members and grow QA talent 

• Proficient knowledge of a NodeJS and Express.
• Understanding differences between multiple delivery platforms (such as mobile vs, desktop), and optimizing output to match the specific platform
• Good understanding of server-side templating languages (such as Jade, EJS, Jinja, etc. depending on your technology stack)
• Good understanding of server-side CSS preprocessors (such as Stylus, Less, Sass etc. depending on your technology stack)
• Creating database schemas that represent and support business processes
• Data migration, transformation, and scripting
• User authentication and authorization between multiple systems, servers, and environments
• Integration of multiple data sources and databases into one system
• Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
• Creating database schemas that represent and support business processes
• Implementing automated testing platforms and unit tests
• Management of hosting environment, including database administration and scaling an application to support load changes
• Understanding of fundamental design principles behind a scalable application
• Good understanding of advanced JavaScript libraries and frameworks such as AngularJS.

• VueJS
• Express
• Socket.IO
• NuxtJS
• MongoDB (3.x)
• Mongoose

Our client is a 5 year old online gaming company with market leading games in three segments - Poker, Rummy and Cricket. Their online games are ensured to be safe, trusted and secure for their customers. They have a registered base of over a million users and are working towards the growth of online gaming in the country.

What you need to have:

WillyWeather is a feature rich weather website and mobile app that beautifully delivers the most accurate local weather data from best in class data sources. Going beyond the average weather service, we process and fine-tune forecasts to the specific coordinates of over 45,000 Australian locations.

WillyWeather has a loyal user base of over 3 million Australians each month. We have launched in the UK and US, and are on track to be the leading provider of local weather services worldwide.

WillyWeather operates through a http://www.willyweather.com.au?campaign=jobs">website, an https://itunes.apple.com/au/app/willyweather/id592978502">iPhone app and an https://play.google.com/store/apps/details?id=au.com.willyweather">Android app. The Android app has an average rating of 4.7☆ from around 7.8K users.

We are looking for an experienced and highly motivated Senior Android Developer to join our team for a full time permanent position. The successful candidate will be working remotely, and will be provided with a laptop to be able to work from home. This is an exciting opportunity to showcase your exceptional Android skills within an international team of talented and passionate people working collaboratively on a high-quality product. 

Responsibilities:

• Manage and oversee a project from the conceptual phase to the deployment phase
• Technical leadership
• Software development
• Code reviews

Technical Requirements:

• Android SDK
• Java
• Kotlin
• JUnit

Skills and Experience:

• English speaker
• Computer Science degree or similar
• 4+ years’ Android experience
• At least one app currently published and live on the Google Play store
• Experience with Android Widgets
• Understanding of Google’s Android design principles and interface guidelines
• Experience crafting pixel-perfect user interfaces with complex interactions and animation
• Experience with Google Maps API
• Test driven development
• Passion for delivering well designed high quality software
• Knowledge of OOP, design and architectural patterns such as MVC
• Excellent communication and documentation skills
• Ability to self-manage and work autonomously in a collaborative environment