Java Developer-Full Stack

Job Description:

We’re looking for a Software Engineer who’s passionate about building scalable, high-performance applications using Java and Kotlin on AWS. You’ll collaborate closely with cross-functional teams — including DevOps, QA, and Product — to design, develop, and deliver robust software solutions.

Our culture values collaboration, ownership, and continuous learning. We embrace modern technologies to solve real-world problems and continuously evolve our platform to meet changing business needs.

Key Responsibilities

• Develop and enhance features to collect, process, and deliver user-generated content.
• Collaborate with engineers, product managers, and designers to build end-to-end solutions.
• Write clean, maintainable, and efficient code following best practices.
• Participate in design discussions, code reviews, and technical brainstorming sessions.
• Identify and fix performance bottlenecks and technical issues.
• Contribute to CI/CD pipelines, infrastructure automation, and developer tooling initiatives.
• Maintain and improve application reliability, scalability, and security.

Required Skills & Experience

• 4+ years of full-stack development experience using Java/Kotlin and AWS.
• Hands-on experience in API development for front-end applications.
• Strong understanding of relational databases (PostgreSQL, MySQL) and handling large datasets.
• Experience working with CI/CD tools (CircleCI, GitHub Actions, Drone).
• Experience with Infrastructure as Code using Terraform.
• Exposure to event-driven architectures (SQS, SNS, Kafka, Kinesis, Pub/Sub) and idempotent patterns.

Nice-to-Have Skills

• Familiarity with automated database migration tools (Liquibase, Flyway).
• Experience with cloud storage (AWS S3, GCP Cloud Storage, Azure Blob) or document data stores (DynamoDB, MongoDB).
• Experience containerizing applications using Docker and deploying to ECS or Kubernetes.
• Proficiency with Git and collaborative development workflows.
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Should have strong hands on experience of 8-10 yrs in Java Development.

Should have strong knowledge of Java 11+, Spring, Spring Boot, Hibernate, Rest Web Services.

Strong Knowledge of J2EE Design Patterns and Microservices design patterns.

Should have strong hand on knowledge of SQL / PostGres DB. Good to have exposure to Nosql DB.

Should have strong knowldge of AWS services (Lambda, EC2, RDS, API Gateway, S3, Could front, Airflow.

Good to have Python ,PySpark as a secondary Skill

Should have ggod knowledge of CI CD pipleline.

Should be strong in wiriting unit test cases, debug Sonar issues.

Should be able to lead/guide team of junior developers

Should be able to collab with BA and solution architects to create HLD and LLD documents

Experience • 1-3 years

Skill to Test

• Java EE (Servlets, JSTL, JSP, JDBC)

• ReactJS

Primary Skills

• Java EE (Servlets, JSTL, JSP, JDBC)

• Frontend frameworks (ReactJS and/or Angular)

• Pure JavaScript, jQuery

• Bootstrap, HTML5, CSS, SASS

Secondary Skills (nice to have)

• Passionate about implementing UX\UI of web applications

• Microsoft SQL Server (writing optimized queries, stored procedures, triggers etc.)

• API Design (REST, JAX-RS)

• Understanding Apache Tomcat configuration and deployment of web applications

• Understanding of browser technologies and limitations

• Authentication and Authorization (SAML, OAuth, OpenID, Okta)

2

Soft Skills

• Thrives collaborating in a team environment with a diverse range of people

• Passionate about delivering an amazing customer experience

• Able to have a change of mind, and able to change the minds of others

• Writes clearly and concisely

• Capable of working without a company office, with a fully remote team

Growth Skills

• Possesses a good work ethic; a self-starter with a desire to grow

• Always looking for better ways to get the job done

Interested candidates are requested to email their resumes with the subject line "Application for [Job Title]".

Only applications received via email will be reviewed. Applications through other channels will not be considered.

Overview

Adesso India specialises in optimization of core business processes for organizations. Our focus is on providing state-of-the-art solutions that streamline operations and elevate productivity to new heights.

Comprised of a team of industry experts and experienced technology professionals, we ensure that our software development and implementations are reliable, robust, and seamlessly integrated with the latest technologies. By leveraging our extensive knowledge and skills, we empower businesses to achieve their objectives efficiently and effectively.

Job description

The client’s department DPS, Digital People Solutions, offers a sophisticated portfolio of IT applications, providing a strong foundation for professional and efficient People & Organization (P&O) and Business Management, both globally and locally, for a well-known German company listed on the DAX-40 index, which includes the 40 largest and most liquid companies on the Frankfurt Stock Exchange.

We are seeking talented Java Application Developers to join our dynamic DPS team. In this role, you will design and implement change requests for existing applications or develop new projects using Jakarta EE (Java Enterprise Technologies) and Angular for the frontend. Your responsibilities will include end-to-end process mapping within the HR application landscape, analyzing developed functionalities, and addressing potential issues.

As part of our dynamic international cross-functional team you will be responsible for the design, development and deployment of modern high quality software solutions and applications as an experienced and skilled Full-stack developer. 

Responsibilities:

Design, develop, and maintain the application.

Write clean, efficient, and reusable code.

Implement new features and functionality based on business requirements.

Participate in system and application architecture discussions.

Create technical designs and specifications for new features or enhancements.

Write and execute unit tests to ensure code quality.

Debug and resolve technical issues and software defects.

Conduct code reviews to ensure adherence to best practices.

Identify and fix vulnerabilities to ensure application integrity.

Working with other developers to ensure seamless integration backend and frontend elements.

Collaborating with DevOps teams for deployment and scaling.

Requirements:

Bachelor’s degree in computer science or information technology, or a related field.

Proven experience as a skilled Full-stack developer. Experience in Utilities / Energy domain is appreciated.

Strong experience with Java (Springboot), AWS / Azure or GCP, GitLab and Angular and / or React. Additional technologies like Python, Go, Kotlin, Rust or similar are welcome

Excellent problem-solving and debugging skills. 

Strong communication and collaboration abilities to work effectively in a team environment.

Skills & Requirements

Java, Spring Boot, Jakarta EE, Angular, React, AWS, Azure, GCP, GitLab, Python, Go, Kotlin, Rust, Full-stack Development, Unit Testing, Debugging, Code Review, DevOps, Software Architecture, Microservices, HR Applications, Cloud Computing, Frontend Development, Backend Development, System Integration, Technical Design, Deployment, Problem-Solving, Communication, Collaboration.

Key Responsibilities:

• Design low level specification for the feature/module in consultation with product architect(s).

• Closely work with product managers/owners, architect(s) to understand the business requirements and code optimally.

• Propose and implement different algorithms in software code for high performing, high throughput, and low latency product features.

• Should be able build, make enhancements and maintain existing native web application user interface based on NodeJS, JavaScript or TypeScript, Angular, React, and Next/Vue.

• Develop and maintain generic solutions and utilities that can be integrated into any product.

• Integrate intelligent product performance indicators into the product to periodically monitor and take preemptive actions.

Key skills and experience required for the job:

• Technology: OOAD, Java/J2EE, Data Structures and Algorithms, Design Patterns, Spring Boot, Microservices/Cloud Native architecture, Cloud Foundry, Docker, K8S, RDBMS, SQL, NoSQL, Redis/HazleCast, jUnit, Mockito, Rabbit MQ, JMS, Apache Camel, KAFKA, WebSocket messaging, gRPC, GraphQL, Angular/React/Vue.js

• Source Control: Git, GitLab, GitHub etc.

• Design: UML, ArchiMate, EA Sparx, MS Visio, Lucid Chart, Figma

• DevSecOps: GitHub Workflows, Helm, Jenkins, CloudBees Flow, uDeploy, Nexus Repo, Site Reliability etc.

• Cloud Technologies: MS Azure, AKS, Azure Event Hub/Grid, Azure Storage, GCP, PCF, AKAMAI, APIGEE or equivalent.

• Code Quality: Sonar, MF Fortify, SAST, DAST

• Process: Safe Agile, DevOps, TDD and BDD

• Experience: 6 – 10 Years of software product development using Java/J2EE along with a minimum of 2 years of web user interface development using any TypeScript framework.

• Education: Bachelors/master’s in engineering or equivalent.

• Soft Skills: Communication, Analytical thinking, Problem Solving, Judgement & Decision Making, Planning & Organizing and Teamwork

Nice to have skills for the job:

• APM : Knowledge of AppDynamics, Grafana, Dynatrace, Splunk, Elk

**Responsibilities:**

- Lead the backend development team, providing mentorship and guidance to junior developers.

- Design, develop, and maintain robust backend systems using Node.js and NestJS with TypeScript.

- Implement event sourcing and message queue solutions using technologies such as Kafka or RabbitMQ.

- Utilize strong PostgreSQL knowledge to design, optimize, and manage databases effectively.

- Implement DevOps practices and tools to ensure continuous integration and delivery (CI/CD), containerization with Docker, and orchestration with Kubernetes.

- Collaborate closely with frontend developers to integrate backend services with user interfaces seamlessly.

- Lead and contribute to architectural discussions and decisions to ensure scalability, reliability, and performance of our systems.

- Troubleshoot and resolve technical issues promptly, demonstrating strong analytical and problem-solving skills.

**Requirements:**

- Bachelors or Masters degree in Computer Science, Engineering, or a related field.

- 5+ years of experience in software development, with a significant focus on backend technologies.

- Proven leadership experience as a team lead or senior developer, with a track record of mentoring junior developers and leading successful projects.

- Profound expertise in Node.js and NestJS with TypeScript.

- Experience with event sourcing and message queues (e.g., Kafka, RabbitMQ).

- Strong knowledge of PostgreSQL, including database design, optimization, and management.

- Solid understanding of DevOps practices and tools (CI/CD, Docker, Kubernetes, AWS/GCP/Azure).

- Ability to collaborate effectively with cross-functional teams, including frontend developers.

- Strong analytical skills and problem-solving abilities.

- Excellent communication and leadership skills.

Building web application front end & backend

React

Spring Core, Spring MVC

Spring Boot

Spring Webflux/Reactive

Mongo DB/Cassandra

HTML, CSS, Javascript,

Cloud Basics (AWS/GCP/Azure)

Cloud Functions (AWS/GCP/Azure)

We are looking for a FULL-TIME OFFICE POSITION Java Developer (2-3 years experience) who is proficient with coding and can design, develop, test, and implement Java applications and resolve technical issues.

As a Java Developer, we are looking for a highly skilled candidate, who will be responsible for building great web applications in Java, analyzing business objectives and user requirements, suggesting necessary changes for the existing Java applications, compiling detailed technical documentation, and determining application functionalities and features.

Do you think you fit this description well? Then apply now!

Expected Responsibilities

• Understanding the business requirements
• Designing and developing the front end for customer-facing applications using the MVC framework
• Creating RESTful APIs for the front-end developers with and with ORM or raw query for any Database technologies like MySQL or MongoDB
• Creating self-contained, reusable, and testable modules and components
• Ensuring a clear dependency chain regarding the app logic as well as the file system
• Supporting continuous improvement by investigating alternatives and technologies and presenting these for architectural review
• Writing non-blocking code and resorting to advanced techniques, such as multi-threading, when required

Required Skills And Qualifications

• MCA/BTech degree in Computer Science, Engineering, or a related subject
• Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
• Experience with Docker or any other containerization tools
• Growth mindset and a positive and collaborative attitude
• Professional, precise communication skills
• Fluency in English, both written and spoken

Must-Haves

• At least 2-3 years of experience as a Java Developer
• Experience with Amazon Web Services (S3, Lambda, Elastic Beanstalk, and other AWS modules)
• Hands-on experience in Core Java, Spring Boot, and Spring framework (Embedded Tomcat), REST API skills
• Deep understanding of Java, servlets in J2EE, web-based request handling with Microservices architecture
• Experience with JavaScript-based front-end frameworks like Angular JS or React JS
• Good understanding of Design Patterns, Data structures, and Algorithms
• Exposure to Agile principles and methodologies, including Continuous Integration and Test Driven Development
• Comprehensive knowledge of OO design principles and development patterns
• Java Batch Scheduling (e.g., Flux, Quartz) knowledge
• Previous experience working with clean code, SOLID principles, TDD

A Little About Who We Are

Klizo Solutions, founded by Joseph Ricard, is an IT company that develops outstanding applications and techs in an enterprise environment, located near CC2 in the New Town Area, Kolkata.

But it isn’t the first brainchild of our founder, as he also has multiple start-ups to his credit, including one of the largest music apps in the Philippines and Italy and a first-of-its-kind Cannabis Vending Machine.

So, naturally, being a part of a company founded and run by such a visionary tech leader and a serial entrepreneur, our employees always have ample opportunities to learn and grow as the company evolves.

Currently, our big happy Klizo family consists of 50+ employees. But we want to extend the happiness of working and collaborating with talented individuals even further. And by this, we mean we will hire more talents over the next few weeks!

Perks Of Being A Klizonian

• Training will be provided (if required)
• 5-day working in a week
• On-time salary every month
• Cool and approachable management
• Numerous opportunities for growth

Job Type: Full Time

• Proficiency in Java, with a good understanding of its ecosystems
• 2+ Yrs experience in microservices
• Sound knowledge of Object-Oriented Programming (OOP) Patterns and Concepts
• Familiarity with different design and architectural patterns
• Skill for writing reusable Java libraries
• Know how of Java concurrency patterns
• Basic Understanding of the concepts of MVC (Model-View-Controller) Pattern, JDBC (Java Database Connectivity), and RESTful web services
• Experience in working with popular web application frameworks like Play and Spark
• Relevant Knowledge of Java GUI frameworks like Swing, SWT, AWT according to project requirements
• Ability to write clean, readable Java code
• Experience in handling external and embedded databases
• Understanding basic design principles behind a scalable application
• Skilled at creating database schemas that characterize and support business processes
• Basic knowledge of JVM (Java Virtual Machine), its drawbacks, weaknesses, and workarounds
• Implementing automated testing platforms and unit tests
• In-depth knowledge of code versioning tools, for instance, Git
• Understanding of building tools like Ant, Maven, Gradle, etc
• Expertise in continuous integration
• Other required skills of a java developer include the basic knowledge of:
• JavaServer pages (JSP) and servlets
• Web frameworks like Struts and Spring
• Service-oriented architecture
• Web Technologies like HTML, JavaScript, CSS, JQuery
• Markup Languages such as XML, JSON
• Abstract classes and interfaces
• Constructors, lists, maps, sets
• File IO and serialization
• Exceptions
• Generics
• Java Keywords like static, volatile, synchronized, transient, etc
• Multi-threading and Synchronization

• Liaise with fellow developers.
• Designing and implementing microservices which use the spring boot framework.
• Working in compliance with the full Software Development Life Cycle.
• Connecting microservices to interact with databases.
• Understanding of how streaming technologies work such as Kafka.
• Identifying and finding solutions to bugs.
• Ensure you've written adequate test cases to verify design requirements are being met.
• Create well written documentation for the individual microservices.