Sr. Java Developer

Wissen Technology is now hiring for a 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:

• Experience - 4+ 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.

Role: Core infrastructure for two global applications.

Key responsibilities:

Heavy Data Lifting: Designing and maintaining complex MongoDB aggregation pipelines and executing high-volume bulk updates.

Systems Connectivity: Managing the lifecycle of Bridges, WebSockets, and REST APIs for global traffic.

Global Reliability: Troubleshooting performance regressions, managing SSL/TLS certificates, and optimizing AWS S3/EC2 resources.

Core Logic: Implementing server-side push notifications, custom payment flows, and background Cron orchestration.

Requirements (Must Have)

Production Experience: Proven experience managing backend services for live, high-traffic applications. (Must have)

Note: Learning projects, bootcamps, and online courses will not be considered.

Python Mastery: Expert-level proficiency in backend Python development. (Must have)

MongoDB Expertise: Deep knowledge of Aggregations and Bulk operations. (Must have)

AWS Proficiency: Direct experience with S3 and EC2 in a production setting. (Must have)

Infrastructure Logic: Ability to manage SSL/Encryption and optimize resource allocation (Cron vs. API). (Must have)

We’re Hiring Backend Developers | Java / Go / Python | 3–5 Years | Bangalore

We are expanding our engineering team and looking for talented Backend Developers with 3–5 years of experience to join us in Bangalore.

If you enjoy building scalable systems, working with modern cloud technologies, and solving complex problems, this opportunity is for you!

💼 Position

Backend Developer (Java / Go / Python)

📍 Location: Bangalore

👨‍💻 Experience: 3–5 Years

🔎 What You Bring

✔ Strong proficiency in Go or similar backend languages like Python with Fast API or JAVA with Springboot .

✔ Experience designing RESTful APIs

✔ Hands-on experience with AWS / GCP

✔ Experience working with PostgreSQL, Redis, Kafka, or SQS

✔ Strong experience with Microservices architecture

✔ Hands-on experience with CI/CD pipelines

✔ Experience with containerized environments (Docker / Kubernetes)

✔ Familiarity with monitoring tools like Prometheus, Grafana, and Spring Actuator

✔ Strong understanding of data structures, algorithms, and system design fundamentals

✔ Ability to own features end-to-end and solve complex engineering problems

✔ Strong focus on code quality, observability, and operational ownership

✔ Comfortable working in fast-paced, high-growth environments

Java JD

Exp: -2- 4 Years

Location: - Manyata Tech Park, Bangalore, Karnataka, India

Immediate Joiners-15 Days

Job Responsibilities

• Strong experience with Spring and Spring Boot, Spring MVC, Spring Data, Spring Security
• • Exposure working in microservices and containerization(Docker/Kubernetes)
• • Experience with Web Services (JSON, REST, JAX-RS, Spring based REST services)
• • Strong with Java and J2EE/Java EE (including servlets, JSP, JSF, JDBC)
• • Strong understanding of Java Multithreading
• • Experience working with DB like Mongo, Casandra etc.
• • Experience with at least one of the development tools like Git, Gradle, Maven, Sonar, Jenkins, Artifactory etc
• • Experience with web application servers like Tomcat, Jetty, JBoss etc
• • Experience with TDD, code testability standards, JUnit/Mockito
• • Experience with DevOps practices and CICD model of development
• • Good understanding of OOP, design patterns and industry best practices
• • Agile project experience along with working on Agile tools like JIRA
• • Strong written and verbal communication skills
• Good to have Skills:
• • Strong interpersonal skills and time management skills
• • Strong analytical and troubleshooting skills

Exp - 4-6 years

Immediate joiners preferred

Location - Bangalore

Java + Spring boot 

Microservice 

MYSQL 

Design principal 

-Clear Communication: Practice clear and concise communication to effectively convey technical concepts.

- In-Depth Knowledge: Be prepared to provide detailed insights into experiences with specific technologies and tools, showcasing expertise.

- Specific Examples: Share real-world examples or projects where they have applied the mentioned technologies to demonstrate practical knowledge.

- Problem-Solving Skills: Be ready to discuss how they have solved real-world technical challenges in previous roles.

- Continuous Learning: Emphasize a commitment to continuous learning and staying updated with industry trends, especially in rapidly evolving fields like cloud technologies.

Requirement:

• Min 2-3 Year Experience. Preferably in the E-commerce domain. 
• Proficient with both MySQL and NoSql Databases (Elastic, Mongo)
• Strong hold on PHP and preferably good knowledge of Python
• Experience with JavaScript/JQuery
• Ability to do software design for a enterprise web application
• Working knowledge of a MVC front-end framework
• Proficient in HTTP protocol, REST APIs, JSON
• Ability to do database design and modeling
• Proficient in OOPS concepts and writing code using classes
• Ability to write modular and clean code

Role:

• Software Development of various product line 
• Creation web-services and optimization for existing and new feature rollouts
• Collaborate with Product Managers and design solutions 
• Develop very high sense of ownership, the zeal to build scalable applications
• Build customer facing technology product 
• Individual Contributor

We are looking for Product Developers-Java Technology with hands-on experience in Core java and socket programming with the flair for working on cutting-edge solutions.

Responsibilities and duties:

• Responsible for the development and unit testing of various modules in JAVA and other related technologies. 
• Need to do requirement understanding, preparing initial concept and possible architecture design. 
• Responsible for feasibility analysis and POC development. 
• Ability to understand the product architecture and end-to-end system flow. 
• Ability to relate and analyze tasks as per overall product architecture and philosophy. 
• Work in Agile SCRUM development model and be able to plan, estimate, execute and deliver quality work as per committed timeline. 
• Ability to continuously analyze and contribute to lean processes, quality improvements, product growth, and productivity improvements within the team.

Required Skills: 

• JAVA - Core JAVA Concepts, Socket Communication, Multithreading, Exception Handling, Collections Framework, Reflections, I/O, XML, HTML, JSON, YML
• Database version management tools like Liquibase etc.
• Version control system like GIT. Hands-on experience with strong knowledge of branching, merging,
• Build systems like Maven, Gradle, Ant etc.
• Hands-on experience in running development environment on Unix/Linux (Ubuntu, CentOS).
• Cloud computing experience, Integration with third-party devices, experience in writing REST APIs, shell scripting knowledge will be an added advantage.

  We are looking for Product Developers-Java Technology with hands-on experience in Core java and socket programming with the flair for working on cutting-edge solutions.

Roles & Responsibilities:

• Design and Build API/Micro services using Spring boot.
• Experience in Spring Reactive programming.
• Exposure to docker and containerization
• Developing enterprise grade highly scalable java-based application
• Writing test cases using Java testing framework like JUnit, Mockito.
• Proficient understanding of code version tools, such as Git, SVN
• Displaying initiative and an ability to lead others, and develop applications team disciplined manner
• Participating in application solutions including assisting with planning and architectural design, development, resolution of technical issues, and application rationalization.
• Utilizing and applying robust analytic thinking with the ability to identify, debug, and resolve technical issues.
• Achieving significant contributions within a small team of developers to lead teams and deliver solutions within an Agile methodology, whilst ensuring quality, timeliness and team-wide adherence to good architectural practice and guidelines.
• Good Experience in Application Software Design and Development, Object Oriented Analysis and Design (OOAD), Software Testing and Debugging.
• Conduct peer code reviews