Senior Java Developer (Spring Boot)

re-zoo-me; Pleasanton, Northern (CA, KY); Hybrid; USD 140,000 - 220,000; Full time

Job summary

re-zoo-me is seeking a Senior Java Developer with extensive Java, Spring Boot, and database expertise to design and build scalable backend services. This role focuses on architectural decisions, mentoring, and delivering reliable systems in a fast-paced product environment.

You will design microservices, optimize queries, and collaborate with product, QA, DevOps, and frontend teams to drive technical excellence and secure, resilient software delivery.

Qualifications

• 10+ years of professional Java development experience.
• Strong hands-on experience with Java, Spring Boot, and Spring Framework components.
• Proven experience designing and building microservices architectures.

Responsibilities

• Design, develop, and maintain backend applications using Java and Spring Boot.
• Architect microservices and contribute to system design discussions.
• Write clean, well-documented code following best practices.

Skills

Java

Spring Boot

Microservices

SQL/Relational DBs

NoSQL

REST API

Hibernate/JPA

Maven/Gradle

Git/Jenkins

Docker/Kubernetes

Education

Bachelor's or Master’s in CS/Engineering

Tools

Maven/Gradle

Git

Jenkins/GitLab CI

Docker

Kubernetes

Job description

Senior Java Developer (Spring Boot)

Experience Required: 10+ Years

Location: Onsite 5 days at Pleasanton

Looking for: Retail experience, strong java, spring boot

Interview: 3 rounds with hiring manager and Sr Developers. There will be 2 coding interviews

About 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