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Java Developer

ConnectedX, Inc.Phoenix, AZ🇺🇸United StatesPosted 28 Aug 2026

Why This Role Stands Out

Elevate your career as a Java Backend Developer at ConnectedX, Inc., where you'll contribute to impactful projects with significant growth opportunities. This role is perfect for experienced developers who thrive in collaborative environments and are eager to expand their skills in API architecture and payment gateway integrations. Apply today to join a reputable company and make your mark in the technology sector.

Quick Overview

Seniority
Mid Senior
Work mode
On Site
Location
Phoenix, AZ, United States
Posted
5 days ago
DockerMicroservicesSQLSpringSpring BootAPI GatewayAWSAzureGitGoGoogle CloudJWTJavaKafkaKotlinKubernetesPhoenixRESTRabbitMQ

Job Description

Who we are:    
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.  
Job Title: Java Backend Developer
Location: Phoenix (Onsite – In-Person)
Interview Process: One-Shot In-Person Interview Only
Experience Required: 5–7 Years
Employment Type: Full-Time / Contract
Work Authorization: Open to all work-authorized candidates (No visa restrictions)
Job Description
We are seeking an experienced Java Backend Developer to join our team supporting a strategic initiative for our Client in Phoenix, AZ. The ideal candidate will have strong expertise in backend development, API architecture, and payment gateway integrations. Candidates with experience in Kotlin and/or Go (Golang) are highly preferred.
This role requires a hands-on engineer who can design, build, and support scalable, secure, and high-performance backend services in a modern microservices environment.
Key Responsibilities
  • Design, develop, and maintain scalable backend applications using Java.
  • Build and enhance RESTful APIs and microservices for enterprise-grade applications.
  • Develop and support integrations with payment processing and payment gateway platforms.
  • Work extensively with API Gateway technologies to manage, secure, and monitor APIs.
  • Collaborate with architects, product owners, and cross-functional teams to deliver high-quality solutions.
  • Implement secure coding practices and ensure compliance with enterprise security standards.
  • Troubleshoot production issues and optimize application performance.
  • Participate in code reviews, technical design discussions, and architecture decisions.
  • Contribute to CI/CD pipelines and DevOps best practices.
Required Qualifications
  • 5–7 years of hands-on experience in Java backend development.
  • Strong experience with Java, Spring Boot, and Microservices architecture.
  • Solid experience designing and developing REST APIs.
  • Hands-on experience with API Gateway platforms (Apigee, Kong, AWS API Gateway, MuleSoft, or similar).
  • Proven experience working with Payment Gateway integrations and payment processing systems.
  • Strong understanding of distributed systems, event-driven architecture, and backend design patterns.
  • Experience with relational and NoSQL databases.
  • Familiarity with cloud environments and containerization technologies.
  • Strong problem-solving and communication skills.
Preferred Qualifications
  • Experience with Kotlin development.
  • Experience with Go (Golang) development.
  • Prior experience in financial services, fintech, payment processing, or banking domains.
  • Experience with messaging technologies such as Kafka or RabbitMQ.
  • Knowledge of OAuth2, JWT, API security, and authentication frameworks.
Technical Skills
Must Have:
  • Java
  • Spring Boot
  • Microservices
  • REST APIs
  • API Gateway
  • Payment Gateway Integration
  • SQL/NoSQL Databases
  • Git
Nice to Have:
  • Kotlin
  • Go (Golang)
  • Kafka
  • Docker
  • Kubernetes
  • Cloud Platforms (AWS/Azure/Google Cloud Platform)
Additional Information
  • Location: Phoenix, AZ (100% Onsite)
  • Interview: One-shot In-Person Interview (No virtual option)
  • Experience: 5–7 Years
Priority Skills: API Gateway, Payment Gateway Experience, Kotlin, Go (Golang), Java Backend Development.

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