Senior Java Software Engineer Job Description
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We are seeking an experienced Full Stack Java Engineer to join our team. As a key member of our engineering team, you will play a pivotal role in the modernization of our legacy system into a clean, modular system.
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This is a hands-on role for a senior developer leader who enjoys solving complex challenges and driving software evolution across the full stack. You will work closely with leadership and a small engineering team to gradually refactor and rebuild our core system while keeping the production environment stable, secure, and performant.
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Key Responsibilities:
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* Modernization & Architecture:
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o Participate in the architectural design and progressive refactoring of a legacy Java-based SaaS system into a clean, modular system.
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o Define and document architectural principles, modular boundaries, and migration strategy.
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* Full Stack Engineering:
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o Contribute to backend (including DB) and frontend development using modern Java and web frameworks.
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o Refactor and re-architect legacy code to increase clarity, testability, and extensibility.
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* Cloud Infrastructure & DevOps:
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o Maintain and enhance the AWS-hosted environment including services like Lambda, EC2, RDS, and S3.
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o Implement observability and monitoring solutions (e.g., CloudWatch, Sentry).
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* System Maintenance & Stability:
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o Monitor, debug, and resolve performance bottlenecks and system issues in production.
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o Automate maintenance workflows and system health checks.
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o Collaborate with stakeholders to address bugs, technical debt, and service improvements.
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* Team Enablement:
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o Share architectural knowledge through diagrams, documentation, and code reviews.
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o Advocate for modern design principles and mentor developers on best practices.
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Required Qualifications:
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* 5+ years of Java development experience, including modern versions (Java 8+), Spring Boot, or equivalent frameworks.
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* Deep knowledge of software architecture, particularly in domain-driven design, modular monoliths, and clean layering.
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* Experience implementing or migrating to Hexagonal Architecture, CLEAN architecture, strangler fig or similar patterns.
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* Hands-on experience with AWS services including Lambda, RDS, EC2, and S3.
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* Solid understanding of CI/CD, infrastructure as code (Terraform/CloudFormation), and DevOps practices.
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* Proficiency in troubleshooting distributed systems and handling complex production issues.
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* Working knowledge of relational databases (PostgreSQL, MySQL) and data modeling.
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* Comfort with front-end technologies (HTML/CSS/JS) for full-stack development where needed.
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* Strong version control experience with Git.
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* Excellent written and verbal communication skills.
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Nice to Have:
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* Familiarity with compliance/regulatory environments (e.g., HIPAA, SOC2).
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* Exposure to modern frontend frameworks like React or Vue.
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* Familiarity with observability tooling like Sentry, Prometheus, or ELK.
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Why This Role Matters
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This role offers the opportunity to tackle a meaningful challenge of modernizing a production system with real-world impact. You will have ownership in the architectural direction and leave a long-term legacy in the codebase. You will work in a collaborative, flexible, remote-first team culture and influence technical standards, practices, and development workflows from the ground up.
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