
Key Responsibilities:
● Design, develop, and maintain high-performance, scalable, and secure backend systems using Java.
● Build and maintain RESTful APIs and microservices to support application functionality.
● Collaborate closely with frontend developers to ensure smooth integration with React/Angular-based frontend systems.
● Work with both relational databases (SQL) and NoSQL databases to design data schemas, optimize queries, and maintain data integrity.
● Leverage cloud platforms (AWS, Azure, Google Cloud) to deploy, monitor, and scale applications.
● Implement and maintain containerization using Docker and Kubernetes (K8S).
● Write unit tests for both backend and frontend code to ensure code quality and reliability.
● Participate in code reviews to maintain code quality standards and mentor junior developers.
● Contribute to a culture of continuous improvement, proposing and driving best practices in backend development, testing, and deployment.
Required Skills And Experience
● Bachelors or Masters in computer science or related fields.
● 5+ years of experience in backend development, with strong expertise in Java (must-have).
● Solid experience with frontend frameworks such as React or Angular.
● Hands-on experience with RESTful APIs, Docker, and NoSQL databases (such as MongoDB, Cassandra, etc.).
● Strong experience with SQL databases (such as MySQL, PostgreSQL, etc.), including database design, optimization, and query writing.
● Familiarity with cloud platforms (AWS, Azure, Google Cloud) and Kubernetes (K8S).
● Experience in writing unit tests and understanding of test-driven development (TDD) principles.
● Strong understanding of Agile/Scrum methodologies.
Nice to Have:
● Exposure to Automation Testing Frameworks (e.g., Selenium, Cypress).
● Experience working in a SaaS (Software as a Service) environment.
● Knowledge of Agile/Scrum methodologies.

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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.
Experience: 2-8 years
Skills
* Hands-on development skills in Java8 features like Streams, Lambda expressions, Enhanced for loops, Parallel processings, etc.
* Hands-on development skills in Springboot, Microservices & JPA/Hibernate.
* Experience in designing, analyzing and troubleshooting large-scale distributed systems.
* Experience in any Java based rule engine implementation for workflows.
* Experience in Dockers, ElasticSearch, Messaging and any RDBMS.
* Experience with Swagger, Git, Jenkins & Maven.
* Experience with any of Nosql databases.
- Bachelor's or Master’s degree in Computer Science or equivalent area
- 10 to 20 years of experience in software development
- Hands-on experience designing and building B2B or B2C products
- 3+ years architecting SaaS/Web based customer facing products, leading engineering teams as software/technical architect
- Experiences of engineering practices such as code refactoring, microservices, design and enterprise integration patterns, test and design-driven development, continuous integration, building highly scalable applications, application and infrastructure security
- Strong cloud infrastructure experience with AWS and/or Azure
- Experience building event driven systems and working with message queues/topics
- Broad working experience across multiple programming languages and frameworks with in-depth experience in one or more of the following: .Net, Java, Scala or Go-lang
- Hands-on experience with relational databases like SQL Server, PostgreSQL and document stores like Elasticsearch or MongoDB
- Hands-on experience with Big Data processing technologies like Hadoop/Spark is a plus
- Hands-on experience with container technologies like Docker, Kubernetes
- Knowledge of Agile software development process

Developer – Golang
Responsibilities:
-
An individual contributor who will be part of the Software R&D team working on the following areas
-
Backend work in Golang, Micro services architecture
-
Work with internal team and customers to deliver solutions that will meet the customer needs with respect to the performance security, scalability and functionality.
-
Implementation of API and authentication methods using JWT
-
Writing scalable, robust, testable, efficient, and easily maintainable code
-
Translating software requirements into stable, working, high performance software
Skills
-
2-5 years of experience in Go programming language
-
Strong experience in working with Goroutine and channel patterns
-
Experience in Go framework for DB, JSON, Sockets, Web Frameworks and tools
-
Knowledge of logging and configuration packages like Zap, Viper
-
Experience in writing unit tests for Golang code
-
Familiarity with code versioning tools such as Git or Azure Repo
-
Should have knowledge of MySQL, PostgreSQL, or any RDBMS
-
Good knowledge of Linux / Ubuntu

● At least 5 years' experience that includes at least 3 years of experience as Salesforce
developer in translating business requirements into working solutions using Salesforce
● Architect, design, implement, test and deliver applications and systems in Salesforce.
● Design and implement solutions to automate development tasks, releases, and
maintenance of the Salesforce platform.
● Build internal solutions, with custom front ends (web, mobile) and backend services that
automate business processes.
● Integrate third party products into internal systems as well as support and upgrade
implemented systems. Author design documents and present design reviews
● Work in an agile development environment making regular incremental progress. Partner
with LAM developers, Business Analysts in NYC to define and implement solutions that
improve internal business processes
● Expertise in batch, queueable and scheduled jobs, future methods, Apex and triggers
● Build shareable components with HTML, CSS, JavaScript and lightning framework like –
Aura and / or Lightning Web Components
● In depth understanding of SFDC Profiles/Roles and Sharing Rules, Validation Rules,
Tasks, Workflow rules, and Triggers, etc.
● Experience with developer practices for code bulkification to adhere to Salesforce
governor limits on such items as SOQL queries
● Ability to communicate effectively with the team
● Ability to identify gaps in functional/business requirements and should be able to
effectively communicate this to both Business analysts, Project lead / manager
● Experience Salesforce CRM with Sales & Service Cloud
Desired Qualifications:
● 5+ years of experience in coding with minimum 3 years in Salesforce
● Must have in Java/Web Services development.
● Must have 1+ year of Lightning Web Component & 2+ years of Aura (Lightning)
Component experience.
● Must have Salesforce Platform Developer 1 and / or Salesforce Advanced Developer
certification.
● Masters / Bachelors in Computer Engineering, Information Technology or relevant
engineering field.
● 3+ years Java development experience including solid experience in HTML, JavaScript,
jQuery, JSON, XML, REST, SOAP, CSS, SOQL & SOSL.
● 1+ year of experience with integrations using REST, SOAP Webservices.
Please Note, Job Timings are from 12 PM - 9 PM
- Should have experience in supporting the application and infrastructure 24x7.
- Should have good working knowledge on troubleshooting skills of Operating Systems (Linux/Windows)
- Good experience on Java/j2EE application supporting and AWS infra supporting.
- Ability to work with 3rd parties/FOPS and provide required instruction to troubleshoot and restore faults.
- Respond quickly and effectively to production issues, troubleshooting solutions, and taking responsibility for seeing those solutions through resolution.
- Identify root cause and corrective actions for highly complex availability, capacity, security, performance, and quality issues affecting the database.
- Strong knowledge of Linux/Unix operating system.
- Good knowledge in scripting languages like Shell, Python.
- Good Knowledge on Databases like Mongo, Mysql, SQL Server.
- Respond to alerts and take corrective action to ensure the high-availability of our production environments and participate in an after-hours on-call rotation.
- Experience/Knowledge of other cloud platforms (Azure, Google Cloud) is a plus
- Strong verbal and written communications skills are a must
- Must have production support experience as the requirement is 24X7X365 production support.
- A Bachelors or master’s degree in engineering.
- 2-4 years of experience in software product development.
- Excellent in Data structure, Algorithms & Problem-solving skills.
- Should be willing to code in Node.js/Java/Python/ROR/Golang
- Write extensive, efficient code to address complex modules and that handles interaction between multiple components.
- Customer-focused, react well to changes, work with teams and able to multi-task.
- 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
As a Senior Software Engineer - I,you'll take on complex problems that span multiple components and teams. As SSE - I, you could expect to:
- Independently own one or more multiple modules, which includes: requirement analysis, design, development, maintenance & support
- Write extensive, efficient code to address complex modules and that handles interaction between multiple components.
- Rapidly iterate to add new functionalities and solves complex problems with simple and intuitive solutions
- Produce architecture with clean interfaces, that are efficient and scalable
- Participate and contribute to architectural discussions
- Perform design and code reviews
- Perform technical feasibility and trade off studies & guides others to perform these studies
- Solve production issues. Investigate and provide solutions to minimize the business impact due to outage
- Continuously improve performance metrics of modules you own.
- Actively mentor and develop junior developers in all software development practices
- Participate in the hiring process (referrals, interviews, attending recruiting events or writing blogs)
- Onboard and mentors new team members, helps shape the culture of the team
- Collaborate effectively across teams to solve problems, execute and deliver results
Minimum Requirements:
- A minimum of 4 years of relevant software development experience






