Java Backend Developer

Java Backend DeveloperLocation: Phoenix, AZ (NEED LOCALS) - Onsite InterviewDuration: Long-termInterview: OnsiteAbout ConnectedX Inc:ConnectedX is focused on Digital Transformation and Product Engineering Services, enabling clients achieve their business, operating and technology needs for the digital age. Our unique industry-based, consultative approach helps clients implement digital transformation initiatives. Headquartered in Dallas, Texas, U.S. ConnectedX is a preferred partner for leading Fortune 1000 enterprises and is consistently admired by the clients and employees across the globe.Position OverviewThe ideal candidate is a self-driven backend engineer who thrives in fast-paced environments and possesses a strong passion for building scalable, secure, and high-performance applications. They should have exceptional problem-solving abilities, deep expertise in API and payment integrations, and the ability to collaborate effectively across cross-functional teams while delivering enterprise-grade solutions.The successful candidate will play a critical role in building secure, reliable, and scalable microservices-based solutions that support mission-critical business operations. This position requires a deep understanding of distributed systems, API management, payment processing workflows, and cloud-native development practices.As part of a collaborative engineering team, you will contribute to system architecture, backend development, performance optimization, security implementation, and production support while ensuring adherence to industry best practices and coding standards.Required QualificationsBachelor's Degree in Computer Science, Information Technology, Engineering, or a related field.5–7 years of hands-on backend development experience.Strong proficiency in Java and object-oriented programming principles.Hands-on experience with Kotlin development.Experience developing services using Go (Golang).Extensive experience building REST APIs and microservices architectures.Strong experience with API Gateway technologies and API lifecycle management.Proven experience integrating and supporting payment gateway platforms.Strong understanding of distributed systems and scalable application design.Experience working with relational and NoSQL databases.Solid understanding of software design patterns and system architecture principles.Experience with Git-based source control systems.Preferred QualificationsExperience working in FinTech, Digital Payments, Banking, or E-commerce environments.Knowledge of payment regulations and compliance standards.Experience with event-driven and serverless architectures.AWS API Gateway or Apigee certifications.Cloud platform certifications (AWS, Azure, or GCP).Exposure to high-volume transactional systems handling millions of requests daily.