Java Developer

Oncology Voice Network LLC; Pleasanton, Northern (CA, KY); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Saicon in Pleasanton, CA seeks a Senior Java Developer to design, build, and maintain scalable backend applications using Java and Spring Boot. You will architect microservices, optimize databases, and drive best practices across the team.

The role requires 10+ years in Java, strong Spring expertise, REST API design, and experience with CI/CD, Docker/Kubernetes, and cloud platforms. You will mentor juniors, participate in architectural decisions, and ensure security and performance.

Qualifications

• 10+ years of professional Java development experience.
• Strong Spring Boot & Spring Framework expertise.
• Experience designing microservices and REST APIs.
• Proficient with relational DBs (MySQL, PostgreSQL, Oracle).
• Familiarity with NoSQL (MongoDB, Redis) a plus.
• Experience with CI/CD and DevOps practices.

Responsibilities

• Design, develop, and maintain backend applications using Java and Spring Boot.
• Architect microservices-based solutions and contribute to system design discussions.
• Write clean, efficient, and well-documented code.
• Design and optimize database schemas, queries, and stored procedures for performance and scalability.
• Collaborate with cross-functional teams including PMs, QA, DevOps, and frontend devs.
• Conduct code reviews and mentor junior developers.
• Participate in architectural decisions and contribute to technical roadmaps.
• Ensure security, scalability, and reliability standards are met.
• Stay current with emerging technologies and CI/CD improvements.

Skills

Java

Spring Boot

Spring Framework

Microservices

Relational DBs

NoSQL

REST APIs

Hibernate/JPA

Maven/Gradle

Git

JUnit/Mockito

Docker/Kubernetes

Cloud

Design patterns

Education

Bachelor's or Master's in CS/Engineering

Tools

Docker

Kubernetes

Kafka

RabbitMQ

Jenkins

Git

Job description

# Java DeveloperSaicon · Pleasanton, CACONTRACTPosted Sep 11, 2026## Job DescriptionAbout the Role We are looking for a Senior Java Developer with deep expertise in Java, Spring Boot, and database technologies to join our engineering team. You will play a key role in designing, developing, and maintaining scalable, high-performance applications, while mentoring junior developers and driving technical best practices across the team. Key Responsibilities • Design, develop, and maintain robust, scalable, and high-performance backend applications using Java and Spring Boot • Architect microservices-based solutions and contribute to system design discussions • Write clean, efficient, and well-documented code following industry best practices • Design and optimize database schemas, queries, and stored procedures for performance and scalability • Collaborate with cross-functional teams including product managers, QA, DevOps, and frontend developers • Conduct code reviews and provide constructive feedback to team members • Troubleshoot, debug, and resolve complex production issues • Mentor junior and mid-level developers, fostering technical growth within the team • Participate in architectural decisions and contribute to technical roadmaps • Ensure application security, scalability, and reliability standards are met • Stay current with emerging technologies and recommend improvements to existing systems • Contribute to CI/CD pipeline improvements and DevOps practices Required Skills & Qualifications • 10+ years of professional experience in Java development • Strong hands-on experience with Spring Boot, Spring Framework (Spring MVC, Spring Data, Spring Security) • Proven experience designing and building microservices architecture • Strong expertise in relational databases (e.g., MySQL, PostgreSQL, Oracle) — schema design, query optimization, indexing • Experience with NoSQL databases (e.g., MongoDB, Redis, Cassandra) is a plus • Solid understanding of RESTful API design and development • Experience with ORM frameworks (Hibernate/JPA) • Proficiency in build tools (Maven/Gradle) and version control (Git) • Experience with unit testing frameworks (JUnit, Mockito) and TDD practices • Familiarity with containerization and orchestration (Docker, Kubernetes) • Experience with message queuing systems (Kafka, RabbitMQ, or similar) is a plus • Understanding of cloud platforms (AWS, Azure, or GCP) • Strong knowledge of design patterns, SOLID principles, and clean code practices • Experience with CI/CD tools (Jenkins, GitLab CI, or similar) • Excellent problem-solving, analytical, and communication skills • Bachelor's or Master's degree in Computer Science, Engineering, or related field (or equivalent practical experience) Preferred Qualifications • Experience with event-driven architecture • Exposure to Agile/Scrum methodologies • Prior experience in a technical leadership or mentorship role • Knowledge of performance tuning and application monitoring tools (e.g., New Relic, Datadog, Splunk) • Experience working in a fast-paced, cross-functional product environment## Additional DetailsCity: PleasantonState: CaliforniaCountry: US