Java Developer

Our client is looking for a Java Developer (2-5 -years) to join their high-performance, on-site engineering team in Buffalo, NY. This role is tailor-made for someone who has already moved beyond basic CRUD apps and is confident owning complex back-end systems, collaborating with DevOps and QA, and delivering resilient, secure services in a cloud-native environment.

You’ll work alongside our front-end and infrastructure teams to build API-driven

architectures that scale. We want someone who understands why performance,

observability, and clean design patterns matter, and who thrives in environments where delivery speed and code quality go hand in hand.

Key Responsibilities:

• Design and develop robust, testable Java services using Spring Boot and RESTful APIs, integrating with secure cloud-based systems.
• Architect backend components to support real-time applications, asynchronous workflows, and data-rich transactions.
• Lead or contribute to service-level design decisions, schema modeling, dependency management, and system health monitoring.
• Optimize performance through effective use of logging, caching, multi-threading, and error-handling strategies.
• Collaborate cross-functionally with React developers, DevOps, and QA engineers to deliver full-stack solutions.
• Integrate AWS services such as ECS, SecretManager, PostgresSQL
• Participate in Agile ceremonies, peer code reviews, technical planning sessions, and architecture discussions.
• Travel to client sites across the U.S. and Canada to support system rollouts, troubleshoot deployment issues, and represent the engineering team as needed.

Qualifications:

• 2+ years of hands-on professional experience in backend software development with Java and Spring Boot.
• Strong experience or skillset with: REST API development, Relational (e.g., PostgreSQL), AWS services like S3, and EC2 or Lambda
• Solid grasp of OOP principles, design patterns, and system modularity.
• Experience in CI/CD workflows, Git, and Agile methodologies.
• Ability to independently own, troubleshoot, and enhance production services in secure environments.
• Excellent communication and technical documentation skills.
• Message queues, event-driven architectures, or pub/sub systems, Authentication/authorization strategies (e.g., JWT, OAuth2), Monitoring and logging tools and Visualization (e.g., Grafana, micrometer)
• Full-stack experience with React, Express, or other front-end frameworks
• Experience in highly regulated industries (e.g., healthcare, finance, government)

Eligibility & Work Requirements:

• This position is open to ALL applicants who can meet the eligibility criteria and successfully pass and obtain a U.S Security Clearance. Candidates who are U.S Permanent Residents or requiring visa sponsorship (including OPT, CPT, H-1B, or any other temporary visa) are not eligible and will not be considered.
• The role requires regular travel within the United States and occasional travel to Canada. Applicants must be able to travel without restrictions.