Immediate Joiners only.
JD:
Hands on Experience in Java, Advanced java ,JSP Servelets, Core java,
spring , hibernate , J2EE , springboot.
Experience into Restful Web services and Database like MS sql.
Should be able to work independently.
Should be able to work with team.
Employment Type

About ComUnus Technologies
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This Is NOT a Typical Java Role If your experience is mostly CRUD APIs, controller wiring, or shallow service layers — this role is not for you. We are looking for a top tier backend engineer who thrives on:
* Designing complex algorithms
* Building high-performance, memory-efficient systems
* Owning deep backend logic that actually moves the needle
You will work close to the core engine of the product, not the edges.
What You’ll Be Trusted With
* Architect and build backend systems that must perform under load
* Design and implement custom algorithms for real-world, non-trivial problems
* Solve performance bottlenecks involving CPU, memory, I/O, and concurrency
* Build backend services where latency, throughput, and correctness matter
* Own document & PDF processing pipelines end-to-end:
-Composition
-Rendering
-Optimization
- High-volume generation
* Make hard technical decisions and stand by them
Non-Negotiable Skills
* Exceptional Java expertise (Core Java, Spring Boot, Java 8+)
* Strong command over:
- Data structures & algorithms
- Multithreading & concurrency models
- JVM internals & memory management
* Proven experience building custom algorithms (this will be evaluated)
* Deep backend engineering experience with Spring / Spring Boot
* Strong understanding of:
- API design principles
- Fault tolerance & resilience
- Performance tuning & profiling
* Ability to reason about time complexity, space complexity, and trade-offs
* Strong database fundamentals (query optimization, indexing, transactions)
* Experience with message brokers (ActiveMQ, Kafka, RabbitMQ)
* Exposure to Kubernetes-based deployments or large-scale microservices
Interview Focus (Be Prepared)
* Algorithm design & problem solving
* Deep Java fundamentals
* System design discussions (backend-heavy)
* Performance tuning scenarios
* Real-world debugging and optimization challenges
Responsibilities:
• Collaborate with cross-functional teams, including front-end developers, product managers, and designers, to understand project requirements and translate them into technical specifications.
• Design and develop server-side logic, APIs, and database schema to support the functionality and performance requirements of our SaaS platform.
• Write clean, modular, and well-documented code using any relevant programming language preferably Java with SpringBoot.
• Optimize the backend systems for maximum speed and scalability, ensuring high performance and responsiveness of the application.
• Implement data storage solutions using PostgreSQL or other relational databases, ensuring data integrity and security.
• Conduct thorough testing and debugging to identify and resolve any issues or bugs in the backend code.
• Stay up-to-date with emerging technologies, industry trends, and best practices in backend development and contribute to the continuous improvement of our development processes.
Requirements:
• Proven work experience as a Backend Developer or similar role, with a focus on server-side development.
• Proficiency in working with relational databases, particularly PostgreSQL, and writing efficient SQL queries.
• Familiarity with SaaS concepts and architecture.
• Experience with API design and development, including RESTful APIs.
• Solid understanding of software development principles, including object-oriented programming, design patterns, and data structures.
• Experience with version control systems, such as Git.
• Strong problem-solving and analytical skills, with keen attention to detail.
• Excellent communication and teamwork skills, with the ability to collaborate effectively with cross-functional teams.
• Bachelor's degree in Computer Science, Engineering, or a related field is preferred, but not mandatory
Job Description:
Minimum 3+ years of experience
Java, OOPS, Data structure, Design Patterns, Multithreading, Spring, Hibernate, Java Script based technology, knowledge of J2EE, PL - SQL..
Core Java Topics including Language Features, Architecture.
OOP Concepts in depth with real time scenarios
Understandings of special Keywords and their applicability as well as advantages and
disadvantages - Like static, final, this, super etc. static should be in depth
Singleton class, Serialization, Cloning, Anonymous Inner class concepts.
In depth concept of Dynamic and static polymorphism & Multiple Inheritance issue/ resolve.
Concepts on String, Exception Handling, Array etc.
Java SE 8 and 9 Features: Functional Inheritance, Lambda Expression, default and static method
etc.
Collection Classes in detail along with the internal data structure and working principle.
Multithreading concept. Concept on ConcurrentHashMap etc.
Analysis of Algorithm - Time Complexity – Big O Calculation
Code Optimizing techniques, Different Algorithm designs and strategies.
Design patterns in Java
Different Sorting & Searching Algo with their Time complexity analysis
Problem solving using Hackerrank or similar sites, with focus on Arrays, Linked Lists, Hash Maps,
Trees, Balanced Trees, Stacks, Queues, Strings , Big Number , Data Structures, Object Oriented
Programming
Exception Handling – Advanced, Sorting, Search, Recursion, Graph Theory.
Note: Core Java + PL/SQL (Unix will be add on)
Responsibilities
- Understand existing business operations tool used by customer support and business teams.
- Work with Engineering Manager to upgrade the system to improve system stability and response times.
- Independently lead design and implement new features as per business requirements provided by Product Management team.
- Develop elegant, modular and maintainable solutions. Document all design, operations steps for knowledge sharing purposes.
- Guide junior team members on feature implementation and provide relevant training on existing modules.
Must-know Technologies
- Java EE
- Java Server Facelets (JSF)
- Java Persistence API (JPA), Hibernate
- SQL
- HTML, CSS, JavaScript
- Payara/GlassFish/similar application server environments
Preferred Skills
- 2-8 years of overall experience in software design and development.
- Ability to analyze existing application, implement new features and re-architect the application in case of inefficiencies.
- Strong object-oriented skills and ability to apply design patterns.
- Experience mentoring junior engineers on development, code review, project planning.
Job Position: JAVA Software Engineer
Job Location: Bangalore
Experience: 2 to 12 years
Job Responsibilities:
• Responsible for developing Web Applications using J2EE components.
• Responsible for developing standalone applications using Core Java and JDBC.
Desired Qualification: BE / B.Tech / MCA / MSc in Computer Science or IT
Added advantage: Sun Certified Java Programmer (SCJP), Sun Certified Web Component Developer (SCWCD) certification
Desired Skills:
- Strong skills in JAVA programming languages and focus specially on the following areas Servlets, JSP, Web Services, Struts framework, JDBC/JPA/mybatis (ibatis)/Hibernate, Threads, Collections and Design Patterns.
- Strong skills in web technologies HTML 4/5, JQuery, AJAX, Java Script and CSS.
- Thorough understanding of Object Orientation.
- Above average skills in SQL with familiarity in any of the standard RDBMS – MySQL, MSSQL or Oracle.
- Must have good written and oral communication in English language.
- Must be completely hands-on and an individual contributor and a self-starter; must be able to complete assignments (suitable to his/her experience) with minimal assistance.
- Very good at Analytical and Logical skills.
- Solid understanding of the web development lifecycle.
- Ability to learn quickly and deliver software on time.
Proficient with full development stack (MySQL, Redis, Memcached, MVC frameworks, jQuery, Server Administration, CSS, HTML, etc) and understanding of OOP design, AJAX, jQuery, and MySQL
Understands how to build an optimized web app and has experience with caching and other scaling techniques
The desire and energy to work long hours so that we can continuously improve our website at the quickest pace possible
Passionate about working in a startup and creating a great product
Must love to program, must be willing to learn, and must be creative. If you are the type of person who finds learning a new technology or language an exhilarating experience, you will love it here.
Must be able to show us projects and or websites that you have created. Bonus points if you’ve created these projects/websites outside of your work (we love seeing proof of how much you love technology and coding).
Education - relevant degree in Engineering preferable
Java Developer
Responsibilities
• Design and development of RESTful Web Services
• Hands on database experience (Oracle / PostgreSQL / MySQL / SQLServer)
• Hands on experience with developing web applications leveraging Spring Framework
• Hands on experience with developing microservices leveraging Spring Boot
• Knowledge in Application Server Tomcat
• Continuous Integration tools (Jenkins)
• Ability to communicate effectively in English, with good verbal and written skills
• Strong believer and follower of SDLC principles with an emphasis on Quality & Standards based
• development
What we need
• 3-4 years of experience in Java/J2EE technologies
• Core Java
• Spring Framework
• Spring DI, Spring AOP, Autowiring
• Spring Boot
• Spring ORM / Spring Data JPA
• Willing to learn technology/domain on demand basis
• Good team interactions.








