Senior Java Engineer - Onsite

 Job Description

The Senior Java Engineer will lead the design, development, migration, and support of scalable Java-based microservices and APIs in a modern cloud environment. This role requires strong hands-on engineering capability, technical leadership, and experience modernizing legacy systems.

Responsibilities

• Plan and execute migration from legacy monolithic code to modern, scalable Java-based microservices without disrupting live systems.
• Lead API design and development, including specifications, endpoints, data models, and protocols such as REST and GraphQL.
• Lead data strategy and migration of shared databases into service-specific data layers while maintaining data integrity.
• Identify and resolve data or system bottlenecks early in the development lifecycle.
• Deploy and operate workloads on Kubernetes in AWS, including deployment manifests, Helm, scaling, rollouts, and resource requests/limits.
• Tune and optimize databases through query performance tuning, indexing strategy, connection pooling, migration strategy, and caching patterns.
• Write production-grade code for core services and remain deeply involved in the codebase.
• Ensure seamless API integration with internal systems, external systems, applications, and third-party services.
• Promote adoption of AI in the API development lifecycle, including use of GitHub Copilot for coding.
• Implement authentication, authorization, encryption, and other security best practices to protect data and services.
• Monitor and optimize API performance, scalability, and reliability.
• Support on-call operations.

Qualifications

Skills

• 8+ years of experience leading technical teams in building scalable modern Java services.
• Proven experience breaking down large, complex legacy monoliths into smaller, independent services.
• Deep hands-on knowledge of modern Java, Spring Boot, Hibernate, and REST API development.
• Experience with relational databases such as PostgreSQL or MySQL.
• Strong experience designing, building, and maintaining APIs.
• Ability to lead engineering teams while remaining hands-on with development.
• Experience with Docker, Kubernetes, and Helm.
• Familiarity with application security principles and secure development practices.
• Familiarity with Git version control.
• Familiarity with OAuth.
• Ruby-to-Java migration experience preferred, but not required.