Senior application developer

Mission Within the R&D organization, you will contribute to the design, development and testing of solutions that enhance and maintain ADP products. You will work in a Scrum team and collaborate with product owners, business analysts, architects, Tech Lead, quality engineers and developers to deliver secure, scalable and reliable solutions aligned with ADP engineering and quality standards. Key Responsibilities - Develop and maintain backend services, APIs and responsive frontend applications. - Translate functional and technical requirements into clean, testable and maintainable code. - Contribute to the design and development of AI-powered solutions. - Write unit and integration tests and actively participate in code reviews. - Apply secure coding, performance, observability and documentation standards. - Contribute to CI/CD pipelines, production support and continuous improvement. - Identify technical risks, drive performance and security improvements, and support production issue resolution. - Define scalable architecture, coding standards and engineering practices in collaboration with architects and the Tech Lead. - Contribute to the technical design and end-to-end implementation of complex features across backend and frontend components. Technical Environment Backend – Java | .NET - Advanced proficiency in Core Java, design patterns and SOLID principles - Spring Framework: Spring Boot, Spring MVC and Spring Security - Hibernate and JPA - RESTful APIs and microservices - Memory management and performance optimization - Message queuing systems such as Kafka or RabbitMQ - Advanced proficiency in C# and modern .NET, with the ability to design scalable and maintainable services - NET Core Web API and RESTful service development - Entity Framework Core and LINQ - Dependency injection, asynchronous programming and clean architecture principles - Unit testing with xUnit, NUnit or MSTest and mocking frameworks such as Moq - Secure API development, authen