Lighthouse Technology Services is partnering with our client to fill their Sr. Java Software Engineer III position! This is a 12+ month contract and will be hybrid in Buffalo, NY. This role will be a W2 employee of Lighthouse Technology Services. No C2C or subcontracting arrangements will be considered. What You'll Be Doing: Lead complex systems analysis, design, and development efforts for enterprise Java applications Serve as principal application designer for critical components and major modifications Direct and mentor less experienced engineers, coordinating development tasks across projects Design and build scalable REST APIs and microservices using Java and Spring Boot Drive SaaS migration initiatives, implementing OAuth 2.0, retries, idempotency, and reconciliation logic Develop and deploy solutions within Azure, incorporating security, observability, and resiliency best practices Manage CI/CD pipelines and Infrastructure as Code (IaC) to streamline delivery Prepare technical specifications, test plans, and documentation for complex initiatives Evaluate vendor software and recommend new technologies to improve system performance Ensure adherence to development standards, risk protocols, and regulatory requirements What You'll Need to Have: 6+ years of systems analysis and application development experience Advanced proficiency in Java, Spring Boot, and REST API development Strong understanding of concurrency, performance tuning, and enterprise-grade testing practices Proven experience with Azure cloud development, including security, observability, and resiliency Hands-on experience with CI/CD pipelines and Infrastructure as Code (IaC) Demonstrated expertise in enterprise API design, including OAuth 2.0, retries, and idempotency Experience supporting SaaS migrations, including data validation and reconciliation processes Proven mentoring and leadership capabilities within a technical project environment Pay Range: $80-88/hr Questions about any of our jobs? Email us at recruiting@lhtservices.com View all of our open jobs here: jobs.lhtservices.com