Full Stack Lead Developer - Next JS & Kotlin

Capgemini - West Chester, PA

Full-time - Senior

West Chester, PA

10,001+ employees

Professional, Scientific, and Technical Services

About the position

We are seeking a highly skilled Full Stack Lead Developer proficient in Next.js and Kotlin to join our dynamic team. The ideal candidate will have hands-on experience in developing scalable web applications and microservices, ensuring seamless integration between front-end and back-end components. Familiarity with accessibility standards, CI/CD pipelines, and unit testing will be advantageous for building and maintaining diverse application stacks.

Responsibilities

• Develop and maintain user-friendly web interfaces using React and Next.
• Implement reusable components and ensure performance optimization of front-end applications.
• Collaborate with designers to translate UI/UX wireframes into interactive and responsive web interfaces.
• Manage state using tools like Redux or Context API.
• Ensure cross-browser compatibility and accessibility compliance (e.g., WCAG standards).
• Use tools like axe, Lighthouse, or Deque to identify and resolve accessibility and performance issues.
• Write and maintain unit tests for front-end components using Jest, React Testing Library, or similar frameworks.
• Design, develop, and maintain back-end services and APIs using Kotlin.
• Build and optimize microservices for scalability and reliability.
• Implement RESTful or GraphQL APIs to connect with front-end applications.
• Work with relational and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB).
• Use Kotlin Coroutines for efficient asynchronous programming.
• Write unit and integration tests using tools like Junit, TestNG and Mockito to ensure code quality.
• Develop, customize, and maintain web applications using Sitecore CMS.
• Design and implement Sitecore components, templates, and pipelines.
• Troubleshoot, debug, and resolve issues related to Sitecore implementations.
• Develop, test, and maintain iOS applications using Swift.
• Debug and optimize application performance for speed and scalability.
• Perform code reviews and address issues identified by static code analysis tools like SonarQube.
• Design, develop, and maintain microservices using Spring Boot and related technologies.
• Collaborate with cross-functional teams, including designers, product managers, and other developers.
• Participate in code reviews, testing, and debugging to ensure high-quality deliverables.
• Write clean, maintainable, and scalable code adhering to best practices.
• Supervise and improve application performance.
• Contribute to the architecture and technical direction of the project.
• Ensure applications meet accessibility and usability standards.

Requirements

• Proficiency in React/Next.js and its ecosystem (e.g., React Router, Redux, Context API).
• Strong experience with Kotlin for back-end microservice development.
• Hands-on experience in building RESTful and/or GraphQL APIs.
• Knowledge of MVVM, MVC, or other architectural patterns.
• Proven understanding of HTML, CSS, and JavaScript (ES6+).
• Knowledge of asynchronous programming and state management in front-end applications.
• Familiarity with relational and NoSQL databases.
• Experience in unit testing for both front-end and back-end components.
• Understanding of accessibility standards (WCAG, ARIA) and tools like axe and Lighthouse.
• Experience with CI/CD tools like Jenkins or GitHub Actions.
• Understanding of Agile/Scrum methodologies.
• Strong analytical and problem-solving skills.
• Excellent communication and teamwork abilities.
• Ability to adapt and learn new technologies as required.
• Knowledge of microservices design patterns (e.g., Service Discovery, Circuit Breaker, API Gateway).
• Experience in developing microservices using Spring Boot.
• Proficiency in Java 8+ with strong knowledge of object-oriented programming concepts.

Nice-to-haves

• Strong understanding of the Swift programming language and iOS SDKs.
• Familiarity with SwiftUI, UIKit, and Foundation.
• Knowledge of Xcode and debugging tools for performance optimization.
• Experience with cloud platforms (e.g., AWS, GCP, Azure).
• Familiarity with CI/CD pipelines and version control systems like Git.
• Knowledge of microservices architecture and Kubernetes/Docker for containerization.
• Exposure to testing frameworks (e.g., Mocha for React; TestNG or JUnit for Kotlin).
• Experience with Sitecore CMS for content management and personalization.
• Experience with JSS (JavaScript Services) and Sitecore Headless implementations.
• Familiarity with Solr, Lucene, or other search providers.
• Hands-on experience with Helix architecture and Sitecore template design.
• Familiarity with message brokers like RabbitMQ, Kafka, or ActiveMQ.
• Experience with RESTful API development and tools like Swagger/OpenAPI.

Benefits

• Paid parental leave
• Paid holidays
• Dental insurance
• 401(k)
• Paid time off
• Adoption assistance
• Vision insurance