Java Developer

Job Details:

• Role: Principal Engineer, Java Angular
• Experience: 11-13 Years
• Employment Type: Full-time
• Work Mode: Remote

Job Description

REQUIREMENTS:

• Total experience: 11+ years.

• Strong hands-on experience in Java and Spring Boot for backend application development.

• Must-have expertise in Angular for building modern, scalable web applications.

• Strong experience in designing and developing RESTful APIs and service-based architectures.

• Hands-on experience with PostgreSQL and relational database design.

• Experience working with API Management/Integration platforms such as Apigee, Kong, or MuleSoft.

• Strong understanding of Object-Oriented Programming (OOP), software design patterns, clean architecture, and separation of concerns.

• Hands-on experience with CI/CD pipelines, containerized development, and cloud-native deployment environments.

• Strong experience implementing automated testing across unit, integration, and end-to-end testing.

• Experience applying secure coding practices, including authentication, authorization, input validation, data protection, and OWASP principles.

• Familiarity with AI-assisted development tools for code generation, refactoring, documentation, and engineering productivity.

• Strong experience working in Agile (Scrum/Kanban) product development environments.

• Experience participating in code reviews, technical design discussions, and architecture reviews.

• Strong debugging, problem-solving, communication, and stakeholder collaboration skills.

• Ability to write clean, maintainable, scalable, and production-quality code following engineering best practices.

RESPONSIBILITIES:

• Design, develop, and maintain scalable backend services using Java Spring Boot.

• Design, develop, and maintain modern frontend applications using Angular.

• Build, enhance, and maintain RESTful APIs, integrations, and business services.

• Develop scalable, secure, and high-performance full-stack applications following clean architecture principles.

• Apply software design patterns, object-oriented principles, and clean coding practices throughout the development lifecycle.

• Contribute to system architecture, technical design, solution decomposition, and implementation decisions.

• Review and improve application architecture, code quality, maintainability, and overall engineering standards.

• Implement secure coding practices, ensuring application security, data protection, and compliance with OWASP guidelines.

• Develop and execute automated tests across unit, integration, and end-to-end testing levels.

• Build and manage CI/CD pipelines while supporting containerized and cloud-native deployments.

• Leverage AI development tools responsibly to accelerate coding, testing, refactoring, documentation, and engineering productivity.

• Perform code reviews, root cause analysis, debugging, and performance optimization to improve system reliability and scalability.

• Collaborate closely with Product Managers, Architects, QA, Platform teams, and other stakeholders in Agile environments.

• Identify technical risks early and recommend effective solutions to ensure high-quality software delivery.

• Drive continuous improvement in engineering practices, development processes, and product quality.

Qualifications

Bachelor’s or master’s degree in computer science, Information Technology, or a related field.  

KEY RESPONSIBILITIES

• Collaborate effectively within a lean team structure focused on core legacy application support, optimization, and modernization.
• Drive robust lift-and-shift strategies as well as meticulous deep-architectural refactoring initiatives for existing enterprise applications.
• Actively leverage AI-based development tools (e.g., GitHub Copilot) and modern DevOps automation to significantly accelerate software delivery speed and enhance engineering standards.
• Perform detailed code analysis, proactive performance tuning, regression testing, and systemic stabilization of legacy software environments.
• Ensure absolute end-to-end ownership of development pipelines and tasks with minimal supervisor oversight.
• Align all newly developed modern features and components with the pre-existing tech stack structure and corporate architecture standards.
• Collaborate dynamically with cross-functional stakeholders to align engineering sprints with critical operational milestones and ensure smooth delivery.

REQUIRED SKILLS & QUALIFICATIONS

• Modernization Expertise: Proven hands-on experience navigating complex legacy software codebases, performing technical debt evaluations, and executing migration patterns.
• Full-Stack Core Proficiency: Deep practical competence in at least one backend ecosystem and frontend ecosystem as applicable: Backend: Node.js, Java, or .NET Frontend: Angular or React
• Cloud & CI/CD Frameworks: Comprehensive deployment experience utilizing major cloud architectures (AWS or Azure) and establishing structured automation pipelines (Jenkins, GitHub Actions, etc.).
• AI & Automation Tooling: Hands-on exposure to modern AI-assisted coding extensions, continuous testing applications, and progressive DevOps automation.
• Quality & Observability: Solid diagnostic knowledge utilizing code coverage analysis, structured logging, monitoring suites, and system-level debugging tools.
• Core Competencies: Superior standalone problem-solving capacity, clear professional communications skills, an autonomous work ethic, and a preference for in-office team collaboration

Tech Stack

Frontend: React.js, TypeScript, Next.js, React Native, Redux, GraphQL, Tailwind CSS

Backend & Infra: Java (Spring Boot), Microservices, AWS ECS, Redis, ScyllaDB, MongoDB,

GraphQL, AWS Lambda, MySQL, Aurora

Event Driven & AI: SQS, Kinesis, Claude, Cursor, LangChain

Observability: Prometheus, Grafana, CloudWatch, Sentry

Engineering Excellence: JVM tuning, GC profiling, Circuit Breakers, Async Tracing

We’re hiring an experienced Full Stack Engineer (React + Java) with 5–10 years of

experience to design, build, and scale real-time web applications for our global B2B

hotel marketplace.

You’ll work across the stack—from building intuitive, data-driven UIs to

high-performance backend services that power our distribution engine.

Responsibilities

● Build and maintain end-to-end features spanning React.js frontends and Java

(Spring Boot) microservices and database integrations .

● Develop responsive, performant, and accessible UIs integrated with REST

and GraphQL APIs.

● Design and scale low-latency, high-throughput microservices for real-time

data workflows.

● Implement event-driven systems using Kafka or SQS for asynchronous

communication.

● Collaborate closely with Product, Design, and Architecture teams to translate

business requirements into scalable technical solutions.

● Optimize application performance via caching strategies, async processing,

and database tuning.

● Implement and maintain CI/CD pipelines, test automation, and monitoring

frameworks.

● Leverage AI-assisted tools (Claude, Cursor, etc.) to boost velocity and maintain

code quality.

● Participate in code reviews, design discussions, and architecture decisions.

● Write clean, maintainable code, follow design patterns, maintain high test

coverage, and document key technical decisions.

Requirements

● 6–10 years of full stack development experience with a proven track record in

production systems.

● Strong proficiency in React.js, JavaScript/TypeScript, Redux (or similar state

management) and modern frontend frameworks.

● Solid backend experience with Java, Spring Boot, and Hibernate.

● Database experience with MySQL, MongoDB, or ScyllaDB.

● Hands-on with microservices, AWS (ECS/Lambda), SQS, and GraphQL.

● Familiarity with event-driven architectures and caching layers (Redis) and

asynchronous processing.

● Working knowledge of observability tools (Prometheus, Grafana, CloudWatch,

Sentry).

● Understanding of data structures, algorithms, and system design

fundamentals.

● Passion for clean code, testability, and engineering excellence.

● Strong analytical and communication skills with the ability to collaborate across

Product, Design, and QA teams.

● Comfortable in a remote-first, asynchronous, and ownership-driven culture.

Nice to Have

● Experience with React Native or mobile web frameworks.

● Exposure to Kafka, Kinesis, or other event-streaming platforms.

● Familiarity with CI/CD (GitHub Actions, Docker) and container orchestration

(ECS).

● Experience with AI-assisted development, LLMs, or LangChain pipelines.

● Domain exposure to B2B platforms, travel-tech, or high-scale marketplaces.

● Background in Test-Driven Development (TDD) or Agile methodologies.

Why Join Us?

● Work on mission-critical, high-scale systems used by global hotel brands.

● Build real-time, low-latency products impacting millions of hotel transactions

daily.

● Be part of a remote-first, AI-accelerated engineering culture that values

autonomy and quality.

● Collaborate with senior engineers and architects solving complex distributed

system challenges.

● Competitive compensation with equity participation and career growth

opportunities.

● Learn and work with cutting-edge AI tools—from code generation to

observability automation.

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

 Key Responsibilities

• Design, develop, test, and maintain full-stack applications using Java (backend) and React (frontend)
• Work with and integrate third-party APIs
• Implement and maintain authentication and authorization mechanisms such as SAML, OAuth, OpenID, and Okta
• Collaborate with cross-functional teams in a remote, global environment
• Ensure high standards of code quality, performance, and reliability
• Participate in planning, status updates, and team meetings across multiple time zones

Required Technical Skills

• Strong experience in Java backend development
• Hands-on experience with React for frontend development
• Experience working with third-party APIs
• Solid understanding of authentication and authorization frameworks (SAML, OAuth, OpenID, Okta)
• Experience with cloud-based version control systems such as GitHub or Bitbucket
• Understanding of browser technologies and limitations
• Familiarity with AWS services, primarily EC2 and S3
• Experience with logging and monitoring tools such as New Relic and Grafana

Secondary / Nice-to-Have Skills

• CRM development experience (Salesforce, Dynamics, ServiceNow)
• Exposure to modern data and analytics patterns, including AI and Machine Learning use cases
• Experience with Apache Solr
• Understanding of Apache Tomcat configuration and deployment of web applications

This role requires overlap with multiple time zones for planning meetings, status updates etc. on a regular basis. The duration of these overlaps can change depending on the type of meeting. Upland India has the flexibility to manage your working hours accordingly to he/p in your work-like balance. You can find out more about this during your interview conversation.

Upland Software is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other legally protected status.

Upland RightAnswers is the complete connected knowledge management solution that uses AI and machine learning to improve the user and customer experience by enabling organizations to create a trusted knowledge sharing culture. The solution consists of robust content authoring tools, portals for customers and agents to search the knowledge base, and a robust API for customers to build their own experiences or integrate to alternate forms of self-service delivery.

Our R&D teams are truly global with some legacy concentration in the US in New Jersey, with our customers being enterprise level around the world. The team is small enough for employees to play a pivotal role in the development of our product, but we're supported by a large global business meaning it's also big enough for you to learn and develop your skills within an experienced team.

About Upland

Upland Software (Nasdaq: UPLD) helps global businesses accelerate digital transformation with a powerful cloud software library that provides choice, flexibility, and value. Upland India is a fully owned subsidiary of Upland Software and headquartered in Bangalore. We ore a remote-first company. Interviews and on-boarding ore conducted virtually.

Skill 1 : Java, Spring boot, Microservices and React.

Exp : 3+

Location : Hyderabad and Chennai.

Notice Period : Immediate to 30 days.

Position Overview

We are seeking a highly skilled React Native Developer with a strong background in the MERN (MongoDB, Express.js, React.js, Node.js) stack to join our dynamic team. The ideal candidate will have a minimum of 2 years of professional experience and a proven track record of developing robust, scalable mobile applications using React Native. This role offers an exciting opportunity to work on innovative projects and significantly contribute to the growth and success of our startup.

Key Responsibilities

●     Develop High-Quality Mobile Applications: Create user-friendly mobile applications using React Native, ensuring high performance and responsiveness.

●     Collaborate with Cross-Functional Teams: Work closely with product managers, designers, and other developers to define, design, and deliver new features.

●     Maintain Clean and Efficient Code: Write clean, maintainable, and efficient code following industry best practices and coding standards.

●     Optimize Application Performance: Enhance application performance for speed and scalability.

●     Participate in Code Reviews: Engage in code reviews, discussions, and knowledge-sharing sessions to improve team output and code quality.

●     Troubleshoot and Debug: Identify and resolve application issues to ensure smooth functionality.

●     Stay Updated with Trends: Keep abreast of emerging technologies and trends in mobile development to incorporate best practices.

Requirements

●     MERN Stack Proficiency: Strong expertise in MongoDB, Express.js, React.js, and Node.js.

●     RESTful APIs and Web Services: Solid understanding and experience in integrating RESTful APIs and web services.

●     Version Control Systems: Proficient with Git for version control.

●     Mobile UI/UX Design Principles: Knowledge of best practices in mobile UI/UX design.

●     Problem-Solving Skills: Excellent analytical and problem-solving abilities.

●     Team and Independent Work: Ability to work both independently and as part of a team in a fast-paced startup environment.

●     Communication and Collaboration: Strong verbal and written communication skills, with the ability to collaborate effectively with team members.

Nice to Have

●     GraphQL: Familiarity with GraphQL for efficient data fetching.

●     Cloud Services: Knowledge of cloud services such as AWS or Firebase.

The key skills and expertise needed are:

1. eCommerce/Retail experience can be optional but needs to have experience with any high volume customer facing web/mobile site

2. Web Development, Front End Development, AND In the browser performance profiling

3. Java, Spring Boot, React, Node, Redux, Webpack, Microservices, AND experience with AWS technologies to make the overall application stack more resilient

4. Performance Profiling of web/mobile experiences and experience with working in CICD environment

5. Experience working with Web based and mobile ecommerce sites or similar public facing websites with high customer volume

6. Needs to be able to work at the code level doing performance profile to evaluate how the website and associated digital platform is built to find performance improvement opportunities

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