Java Developer

We're looking for a Senior Java Developer to help design, build, and support scalable enterprise applications in a hybrid environment with onsite collaboration in Oakland, Rancho Cordova, or Alpharetta. This role offers the opportunity to work on modern Spring Boot microservices, RESTful APIs, and cloud-ready solutions while contributing to application modernization and CI/CD initiatives.
Responsibilities

• Design, develop, test, and deploy high-performance applications using Core Java and Spring Boot microservices.
• Build and maintain RESTful APIs and integrate solutions with internal and external systems.
• Translate business requirements into effective technical designs and implementations.
• Participate in architecture discussions, design reviews, and code reviews to improve solution quality.
• Troubleshoot production issues, including performance, scalability, and reliability concerns.
• Collaborate with Product Owners, Architects, DevOps, QA, and other cross-functional partners.
• Work within Agile delivery practices and contribute to engineering best practices.
• Support CI/CD efforts and application modernization initiatives.
• Design and optimize database structures, queries, and stored procedures for relational database environments.

Skills

• 7+ years of Java application development experience.
• Strong hands-on experience with Core Java, including object-oriented programming, collections, multithreading, concurrency, exception handling, JVM concepts, and performance tuning.
• Experience with Java 8+ features such as streams, lambda expressions, and functional programming concepts.
• Practical experience with Spring Boot, Spring MVC, Spring Data JPA/Hibernate, Spring Security, and Spring Cloud.
• Proven background designing and developing microservices-based solutions.
• Experience creating and supporting REST APIs.
• Strong database skills with Oracle or SQL Server, including SQL, schema design, query optimization, stored procedures, and performance tuning.
• Experience with Git, Maven or Gradle, Jenkins, and SonarQube.
• Ability to collaborate effectively, solve problems proactively, and communicate clearly across technical and non-technical teams.

Preferred Skills

• Exposure to Azure services such as Azure Kubernetes Service, Azure Functions, Azure Service Bus, Azure App Services, Azure DevOps, or Azure Key Vault.
• Experience with Docker and Kubernetes.
• Familiarity with Kafka, RabbitMQ, or other messaging technologies.
• Knowledge of API gateways and event-driven architectures.
• Understanding of OAuth and JWT-based security practices.
• Experience with cloud-native or distributed system development.
• Background supporting enterprise applications in modern engineering environments.

Horizontal is committed to fostering an inclusive, equitable, and welcoming workplace where people of all backgrounds can thrive. We value diverse perspectives and encourage candidates from all communities to apply.

By applying for this position, you acknowledge and agree that Horizontal Talent may contact you regarding your application using automated technology, including phone calls, SMS/text messages, or email, which may be delivered by our virtual AI recruiter, Alex.

Please apply through this online posting or by visiting our Job Board at Applications will be accepted for 4 weeks. For those that join the team, we offer competitive compensation and benefits including medical, dental, vision, and retirement. Check out all we have to offer and how you can become part of the Horizontal Talent Team. The pay range for this role is $41 - $78 per hour based on qualifications and experience.