Senior Java Developer

Ingrain Systems Inc; Pleasanton (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Ingrain Systems Inc. is seeking a Senior Java Developer to join the engineering team. You will design, develop, and maintain scalable backend applications using Java and Spring Boot, while mentoring junior developers and driving best practices.

You will architect microservices, optimize database schemas, and collaborate with cross-functional teams to deliver high-performance software. Strong problem-solving, communication, and leadership skills are required, along with 10+ years of Java

Qualifications

• 10+ years of professional Java development experience.
• 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) 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).

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 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.

Skills

Java

Spring Boot

Microservices

Relational DBs

NoSQL

REST API

Hibernate/JPA

Maven/Gradle

Git

JUnit/Mockito

Docker/Kubernetes

Cloud Platforms

Design Patterns

SOLID

CI/CD

Communication

Education

Bachelor's or Master's in CS/Engineering or related field

Tools

Maven/Gradle

Git

Hibernate/JPA

Docker

Kubernetes

SQL

NoSQL

Job description

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