Java Back End Developer

Job Title : Senior API Developer (Spring Boot Microservices + Apigee/APIM)

Experience : 6+ Years

Employment Type : Contract

Role Level : Senior

Project : Leading South Africa Telecommunications Operator

Department : Application & Experience Engineering

Job Overview :

We are seeking a Senior API Developer with strong expertise in Spring Boot Microservices and API Gateway technologies (Apigee/Azure API Management) to design, develop, and manage secure, scalable APIs for enterprise applications and partner integrations.

The ideal candidate will build high-performance APIs exposing business insights, analytics, and AI/ML services while ensuring security, scalability, and reliability.

Mandatory Skills :

Java, Spring Boot, Microservices, REST APIs, Apigee or Azure API Management (APIM), OAuth2, OpenID Connect (OIDC), JWT, Docker, Kubernetes (AKS), API Security, API Gateway, Microservices Architecture, Kafka (Preferred).

Key Responsibilities :

• Design, develop, and maintain secure RESTful APIs using Spring Boot Microservices.
• Build scalable microservices following best practices for resilience, performance, and maintainability.
• Configure and manage APIs using Apigee or Azure API Management (APIM), including authentication, rate limiting, traffic management, and analytics.
• Implement API security using OAuth2, OpenID Connect (OIDC), API Keys, and Mutual TLS.
• Collaborate with Full Stack, AI/ML, Solution Architecture, and Cybersecurity teams to deliver enterprise-grade integrations.
• Support external partner integrations and internal enterprise systems through well-designed API contracts.
• Optimize API performance, monitor usage, troubleshoot issues, and maintain API lifecycle, versioning, and documentation.

Required Skills :

• 6+ years of experience in Backend/API Development.
• Strong hands-on experience with Java, Spring Boot, and Microservices Architecture.
• Expertise in Apigee or Azure API Management (APIM).
• Strong understanding of REST APIs, API versioning, and API lifecycle management.
• Experience implementing OAuth2, OpenID Connect (OIDC), JWT, API Security, and Authentication.
• Experience with Docker, Kubernetes (AKS), and Cloud-native deployments.
• Familiarity with Kafka or other event-driven messaging platforms is a plus.
• Excellent understanding of enterprise integration patterns and scalable API design.

Good to Have :

• Experience with Azure Cloud.
• Telecom, Banking, FinTech, or other regulated industry experience.
• Certifications in Apigee, Microsoft Azure, or Microservices Architecture.

Key Responsibilities

• Frontend Development: Designing and building responsive, interactive user interfaces using React.js, HTML5, CSS3, and modern JavaScript (ES6+).
• Backend Development: Developing robust, scalable server-side applications and microservices using Java and the Spring Boot framework.
• API Integration: Creating and consuming RESTful APIs to ensure seamless communication between the React frontend and the Java backend.
• Database Management: Designing and optimizing database schemas and queries using SQL (e.g., MySQL, PostgreSQL, Oracle) or NoSQL (e.g., MongoDB) databases.
• State Management: Managing application state in React using tools like Redux, Hooks, or Context API.
• Testing & Quality Assurance: Writing unit and integration tests using frameworks such as JUnit for backend and Jest or React Testing Library for frontend.
• DevOps & Deployment: Collaborating on CI/CD pipelines and using containerization tools like Docker and Kubernetes for application deployment. 
• Indeed
•  +14

Required Skills & Qualifications

• Core Technical Skills:
• Deep proficiency in Java (8+) and the Spring ecosystem (Spring Boot, Spring Security, Spring Data JPA).
• Expertise in React.js workflows, component-based architecture, and hooks.
• Strong understanding of Microservices architecture and cloud platforms (AWS, Azure, or GCP).
• Experience & Education:
• Typically requires a Bachelor's degree in Computer Science or a related field.
• Proven experience (often 1–5+ years depending on seniority) in full-stack development.
• Tools: Version control systems like Git, build tools like Maven or Gradle, and Agile project management tools like Jira. 
• Indeed
•  +13

Typical Salary Ranges (India)

• Freshers: ₹3.8 Lakh to ₹12 Lakh per year.
• Experienced (5+ years): ₹18 Lakh to ₹30 Lakh+ per year.
• Average (General): Approximately ₹29 Lakh per year for high-demand specialized roles. 

Who You Are:

• You’ve built scalable, production-ready APIs in fast-paced environments, and are comfortable with the challenges that come with a growing startup.
• You understand event-driven architectures and have hands-on experience building real-time applications.
• You are fully capable of taking ownership of backend systems, from designing the database schema to writing efficient, maintainable code.
• You think beyond the code: optimizing performance, scalability, and security are as important as building new features.
• You’re comfortable troubleshooting complex issues, whether that’s API bottlenecks, database performance, or production issues.

Responsibilities:

• Design, implement, and manage a NestJS backend with a modular, scalable architecture that can easily handle real-time events and communication.
• Develop and maintain WebSocket services for real-time event-driven updates and ensure seamless communication across the system.
• Integrate RabbitMQ for reliable internal messaging, handling queues and ensuring event-driven workflows are efficient and fault-tolerant.
• Implement database management strategies using MongoDB, Redis, and Elasticsearch, ensuring efficient data handling, indexing, and optimization.
• Integrate with external APIs (JSON-RPC, XML-RPC, REST) to enhance system capabilities.
• Ensure high performance of the system by optimizing database queries, implementing caching strategies using Redis, and ensuring optimal indexing and data flow.
• Implement role-based authentication and authorization mechanisms using JWT, OAuth, and RBAC patterns within NestJS.
• Follow security best practices to ensure sensitive data is protected, credentials are stored securely, and the system is resilient to common vulnerabilities.
• Work collaboratively with cross-functional teams to ensure seamless integration between different services and technologies.

Must-Have Skills:

• Strong proficiency in Node.js and NestJS with TypeScript.
• Solid experience with MongoDB, Redis, and Elasticsearch for data storage and real-time data handling.
• In-depth knowledge of WebSockets and Socket.IO in NestJS Gateways, enabling real-time communication and updates.
• Experience with RabbitMQ for message queuing and asynchronous task handling.
• Strong understanding of authentication & authorization systems using JWT, OAuth, and RBAC (Role-Based Access Control).
• Expertise in optimizing APIs, including techniques for caching, improving database performance, and reducing latency.
• Familiar with API security best practices, including secure storage of credentials, encryption, and safeguarding sensitive data.

Key Skills:

• TypeScript, NestJS, WebSockets, Socket.io
• Redis, MongoDB, Elasticsearch, RabbitMQ
• API Optimization, JWT, OAuth, RBAC
• Real-time communication, Event-driven architecture

We are looking for a highly skilled Senior Consultant Java Developer to join our team. As a Java Developer, you will play a crucial role in creating robust back-end applications and database structures. You will work closely with Frontend Developers and Lead Engineers to deliver high-quality backend code and APIs. The ideal candidate is a quick learner who can jumpstart development, highly motivated, and thrives in a collaborative environment.

Key Responsibilities:

• Develop and maintain back-end applications using Java/Java EE, Spring, and SQL.
• Design and develop RESTful services and APIs.
• Collaborate with Frontend Developers and Lead Engineers to ensure seamless integration of front-end and back-end components.
• Mentor junior team members and coordinate with lead/manager.
• Quickly adapt to new technologies and development practices.

Technical Skills and Experience:

• 6-7 years of experience in building software applications.
• Expertise in Java/Java EE, SQL, and database design (Oracle 11g, 12c).
• Strong experience with frameworks such as Spring, Spring Boot, Hibernate, and JPA.
• Knowledge of Microservices architecture and design patterns.
• Experience with application servers (Tomcat, WLS).
• Familiarity with XML technologies.
• Hands-on experience with Docker and Kubernetes.
• Experience with NoSQL databases.
• Proficient with code repository tools (e.g., SVN, Git, Mercurial).
• Prior experience with IDEs like JBuilder, Eclipse, and IntelliJ.

Key Attributes :-

• Self-starter with a high degree of motivation and a go-getter attitude.
• Ability to work in a dynamic, flexible, and collaborative environment.
• Excellent verbal and written communication skills.
• Strong leadership skills and technical ownership.
• Critical problem solver with the ability to anticipate and address issues promptly.

If you are a motivated Java Developer with a passion for back-end development and a desire to work in a collaborative and fast-paced environment, we encourage you to apply.

Software Architect

Bangalore, India / Engineering/ Full-time

Job Overview:

As a Software Architect, you will play a crucial role in designing, developing, and maintaining robust and scalable backend solutions for our software applications. You will be responsible for making strategic technical decisions, and collaborating with cross-functional teams to ensure the successful delivery of high-quality software products with scalable backend infrastructure. 

Responsibilities:

• System Architecture:
• Design and architect scalable, efficient, and maintainable backend systems.
• Collaborate with cross-functional teams to understand business requirements and translate them into technical specifications.
• Technical Leadership:
• Provide technical leadership and guidance to the development team, ensuring best practices and coding standards are followed.
• Mentor and coach team members, fostering a culture of continuous learning and improvement.
• Backend Development:
• Lead the development of backend components, modules, and features primarily on Ruby on Rails tech stack and also be open to contribute in other tech stacks based on Java/Kotlin and Python.
• Implement and maintain APIs, data models, and database structures to support application functionality.
• Performance Optimization:
• Identify and address performance bottlenecks, ensuring optimal system response times and resource utilization.
• Implement caching strategies and other performance optimization techniques.
• Collaboration:
• Collaborate with frontend developers, product managers, and other stakeholders to integrate frontend and backend components seamlessly.
• Participate in code reviews to ensure code quality, adherence to standards, and knowledge sharing within the team.
• Security and Compliance:
• Implement and enforce security best practices to safeguard sensitive data.
• Stay updated on industry trends and emerging technologies to ensure compliance and security standards are met.
• Documentation:
• Create and maintain comprehensive technical documentation for the backend architecture, APIs, and development processes.
• Continuous Improvement:
• Proactively identify opportunities for process improvement and contribute to the evolution of development methodologies and practices.

Qualifications:

• Overall 10+ years of experience, with 2+ years as a Software Architect with a focus on backend development using Ruby on Rails.
• In-depth knowledge of Ruby on Rails framework, database design, and API development.
• Strong understanding of software architecture principles, design patterns, and best practices.
• Experience with performance optimization, scalability, and security considerations.
• Excellent communication and collaboration skills.
• Leadership experience with a demonstrated ability to mentor and guide development teams.
• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent work experience).

Bonus points:

• Familiarity with front-end technologies and frameworks(ReactJs).
• Experience with other programming languages.(Kotlin/Python)
• Experience with cloud platforms and microservices architecture.
• Knowledge of DevOps practices and tools.(AWS, Kubernetes, )

Join us in revolutionizing the way software solutions are developed, and contribute to building cutting-edge applications that make a positive impact on our users and the industry.

Your Opportunity

You will primarily be responsible for implementing features & building platforms to enable on-device and device/server-side combined ML workflows. You will possess strong skills in object-oriented software design and programming. You are excited about developing new features, maintaining existing code, fixing bugs, and contributing to overall system design.

Your Impact

To design, architect, develop and maintain the backend for AI products by working closely with the Engineering Team. To ensure successful consumption of Saarthi.ai technology by APIs, SDKs, or Applications, thereby enabling productization and monetization of the AI solutions.

What You’ll Do

· Work with development teams and product managers to ideate software solutions

· Design server-side architecture

· Along with SAAS application deliverables even the client-side deliverables need to be taken care

· Develop and manage well-functioning databases and applications

· Write effective APIs

· Test software to ensure responsiveness and efficiency

· Troubleshoot, debug and upgrade software

· Create security and data protection settings

· Build features and applications with a mobile responsive design

· Write technical documentation

· Work with data scientists and analysts to improve software

What You Bring

· Proven experience as a Back-End Developer or similar role.

· Experience developing desktop applications.

· Strong working experience with back-end development using Node.JS, JavaScript.

· Strong knowledge of databases (MongoDB, PostgreSQL).

· Experience with System Design and Architecture.

· Familiarity with common stacks.

· Familiarity with Parallel Threading, Concurrent calling and Aggregation Queries.

· Ability to write quality unit tests

· Setting up CI/CD, and integrating with logging and monitoring systems for the products or platforms

· Excellent communication and teamwork skills.

· Degree in Computer Science, Statistics or relevant field

Have an experience building backend server side applications in Node.js and Express.js

Have in-depth knowledge and experience of using ES6+ features and Object Oriented Principles

Have sound knowledge and are familiar with databases like MongoDb - (Preferred) and Mysql.

Have good exposure to cloud native technologies (AWS Lambda, S3, RDS, etc) 

Have working knowledge of version control (Git) and continuous deployment 

Have experience in optimising backend API’s and database queries for optimal performance.

You are good at problem solving and have analytical skills 

You are flexible in adapting new technologies and frameworks as per the projects needs

About the Company
Based in California’s Silicon Valley, WebShar is focused on enabling innovative teams to bring their ideas to life. WebShar provides software development consulting services to innovative companies around the world. Through years of cutting edge technical expertise, the WebShar team utilizes their extensive knowledge of modern software development methodologies to help companies create innovative software solutions.

About the Job Role

 Primary  

• Java, J2EE, Spring MVC
• Hibernate or other ORM
• Web technology and security, REST framework
• Any one UI technology and ready to learn a new one.
• Database knowledge (MySQL, Oracle, Postgres)
• Unit testing frameworks
• Version Control (Eg., Git)

Good To Have  

• Microservices architecture implementation using docker and kubernetes
• Web technologies like HTML, CSS and Javascript
• Python, Shell Scripting

• Identify and analyze user requirements
• Prioritize, assign and execute tasks throughout the software development life cycle
• Document development phases
• Design database architecture
• Develop Java EE applications
• Write well-designed, efficient code
• Review, test and debug team members’ code
• Schedule product releases with internal teams
• Ensure our applications are secure and up-to-date
• Stay up-to-date on emerging technologies

• 6 to 8 years of work experience as a Senior Java Developer or similar role
• Experience designing, building and testing Java EE applications
• In-depth knowledge of popular Java frameworks like Spring MVC
• Experience with Object-Oriented Design (OOD)
• Good delegation and time management skills
• Problem-solving abilities
• BSc in Computer Science, Engineering or relevant field