
Skills
- Strong analytical thinking and problem-solving abilities.
- Solid understanding of system design, data structures, and algorithms.
- Proven experience in designing and implementing scalable architectures and robust design patterns.
- Ability to deliver end-to-end features and enhancements with minimal supervision.
- Proficient in debugging and resolving complex production issues and identifying root causes quickly.
- Ability to quickly learn and integrate new systems into existing platforms.
Programming Languages
- Strong expertise in Java or Python.
Database Skills
- Proficiency in SQL, with hands-on experience in PostgreSQL and MySQL.
Experience with NoSQL technologies, including MongoDB and Redis.

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Company Name – Wissen Technology
Group of companies in India – Wissen Technology & Wissen Infotech
Work Location - Senior Backend Developer – Java (with Python Exposure)- Mumbai
Experience - 4 to 10 years
Kindly revert over mail if you are interested.
Java Developer – Job Description
We are seeking a Senior Backend Developer with strong expertise in Java (Spring Boot) and working knowledge of Python. In this role, Java will be your primary development language, with Python used for scripting, automation, or selected service modules. You’ll be part of a collaborative backend team building scalable and high-performance systems.
Key Responsibilities
- Design and develop robust backend services and APIs primarily using Java (Spring Boot)
- Contribute to Python-based components where needed for automation, scripting, or lightweight services
- Build, integrate, and optimize RESTful APIs and microservices
- Work with relational and NoSQL databases
- Write unit and integration tests (JUnit, PyTest)
- Collaborate closely with DevOps, QA, and product teams
- Participate in architecture reviews and design discussions
- Help maintain code quality, organization, and automation
Required Skills & Qualifications
- 4 to 10 years of hands-on Java development experience
- Strong experience with Spring Boot, JPA/Hibernate, and REST APIs
- At least 1–2 years of hands-on experience with Python (e.g., for scripting, automation, or small services)
- Familiarity with Python frameworks like Flask or FastAPI is a plus
- Experience with SQL/NoSQL databases (e.g., PostgreSQL, MongoDB)
- Good understanding of OOP, design patterns, and software engineering best practices
- Familiarity with Docker, Git, and CI/CD pipelines
Architect, develop and maintain highly scalable, reliable and secure distributed backend
systems on Cloud (AWS or Azure) or on-premises environments for its customers
and partners.
Work closely with your fellow engineers to develop systems capable of concurrently
processing massive amounts of voice data both in online real-time as well as offline
environments.
Drive accountability for test driven development, delivery of high-quality features and
resilient enterprise class solutions.
Lead a culture of team ownership and direct individual and team accountability to
continuously improve how they work to achieve results.
Work in a startup environment, pushing boundaries with deep involvement with business.
Requirements (what we are looking for)
The right person is better than the right set of experiences and these are the traits we’ve
identified make great additions to our team.
BE//BTech/ME/MTech in Computer Science or a related field from a Tier I or Tier II
University.
6-8 years of hands-on software development and deployment experience (experience of
working in a consumer product startup during its growth phase will be a plus) of which 1 – 2
years of experience would be in leading a team of software developers.
Expertise in Java 8+ and Spring Boot is a must
Good experience in messaging platforms like RabbitMQ/Kafka
Good experience in distributed systems and relational & NoSQL databases like PostgreSQL,
MySQL, Redis, MongoDB, etc.
Expertise in one or more of: Python, NodeJS, GoLang would be preferred
Must have hands on experience in products which handle multiple concurrent calls (API),
handle CPU intensive jobs, consist of multiple asynchronous system calls.
Worked on microservices based architecture and design
Managed/ Owned infrastructure on AWS/Microsoft Azure/private clouds and setup high
availability systems
Knowledge of Docker and Kubernetes
Knowledge of RESTful APIs, caching concepts, the HTTP protocol and general web
architecture
3+ years of hands-on experience in Go Lang & its design patterns
Worked in telecom domain
Good understanding of events & handler
Strong understanding & hands on experience in concurrency, go routines & channels
Strong understanding & hands on experience in Spring frameworks and their modules
Integration experience with REST or SOAP APIs
Strong hands-on experience in webservices and API
Good to have:
Docker & Kubernetes
Python development knowledge
Experience in Cloud technologies
Soft Skills:
Good communication skills & presentation skills.
Self-driven work attitude
Should be independently able to drive the tasks.
- Proven hands-on Software Development experience
- Proven working experience in Java development
- Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2, Hibernate)
- Experience in the Spring boot , hibernate Framework
• Experience in software product development
• Proficient in Python, Django, Pandas, GitHub and AWS.
• Good knowledge of PostgreSQL, MongoDB
• Strong Experience in designing REST API’s
• Experience with working on scalable interactive web applications
• Understanding of the threading limitations of Python and multi process architecture
• Familiarity with some ORM (Object Relational Mapper) libraries
• Good understanding of Test Driven Development - Unit and Integration testing
Role and Responsibilities:
The candidate will play be critical role by developing highly scalable applications that provide practical solutions to clients in the financial services’ domain
• Design, build, test and maintain scalable and stable off the shelf application or custom-built technology solutions to meet business needs
• Write testable code that enables extremely high levels of code coverage
• Promote coding,code review, testing and deployment best practices through hands-on research and demonstration
• Contribute to the entire implementation process including driving the definition of improvements based on business need and architectural improvements










