Sr. Software Engineer-Enterprise Platform Modernization and Architecture

Company Description: Hirezon, an HR technology company that offers a comprehensive suite of solutions to streamline various aspects of human resources management. Our product portfolio includes an Applicant Tracking System (ATS), Employee Onboarding & Contract / Offer Letter System, Performance Evaluation & Management System and HR Forms Tracking System. With a focus on simplifying and enhancing HR processes, Hirezon empowers organizations to efficiently manage their recruitment, onboarding, performance evaluations, HR forms approval tracking, and employee referrals, ultimately contributing to a more productive and engaged workforce. Job Description: JOB DUTIES/ POSITION DESCRIPTION Hirezon, LLC in Westborough, MA seeks Sr. Software Engineer-Enterprise Platform Modernization and Architecture to design, develop, modernize, test, deploy, document and maintain Hirezon's multi-tenant HR technology SaaS platform supporting applicant tracking, recruiting, on-boarding, talent management, workflow automation, bulk communications, secure document management and applicant review workflows. Requires brownfield modernization of a long-running Java/J2EE/JSP/Servlet, Tomcat, Spring, Hibernate, SQL Server, JavaScript, and Angular platform while maintaining production continuity across clustered application nodes. Design asynchronous queue-based processing and REST APIs; assume end-to-end ownership of solution design, rollout, production support, and on-call responsibilities and support deployments across Rackspace, AWS, and Azure environments. Develop and integrate AI-enabled application capabilities, including semantic search, recruiting workflow applications, document analysis, and related technologies that support modernization of the Hirezon platform. Requirements: EDUCATION/EXPERIENCE REQUIRED Requires Proof of Experience with: Developing production enterprise applications using Java, JSP, Servlets, Spring Framework, Hibernate/JPA, SQL Server or comparable relational databases, REST APIs, JavaScript, and Angular or comparable modern web frameworks Modernizing/enhancing mature legacy or brownfield enterprise software platforms by integrating new technologies to effect architectural change while maintaining operational continuity and system reliability. Owning end-to-end design, rollout, production support, on-call support, operational troubleshooting, and post-deployment stabilization of enterprise software systems. Developing or supporting large-scale multi-tenant SaaS applications with tenant-aware configuration, permissions, data isolation, or feature controls. Designing and supporting distributed systems, asynchronous queue-based processing, message-driven workflows, idempotent processing, database lease/locking coordination, scheduler coordination, or equivalent multi-node work-distribution patterns. Developing enterprise integrations and REST API services connecting legacy systems, cloud services, document stores, ticketing/workflow systems, or external service providers. Implementing production reliability patterns such as circuit breakers, retry/backoff, external-service isolation, background processing, graceful degradation, monitoring, alerting, or performance optimization. Implementing application security, authentication, authorization, auditing, secure document access, and protection of sensitive applicant, employee, customer, or regulated data. Deploying, monitoring, troubleshooting, and supporting enterprise applications in cloud or hosted environments such as Rackspace, AWS, Azure, Kubernetes, Tomcat clusters, or comparable infrastructure. Technically leading engineering teams through legacy-system integration, architecture modernization, code reviews, technical design reviews, and mentoring software engineers Requires Masters Degree in Computer Science, Computer Science & Engineering, Software Engineering or related field. Foreign degrees accepted plus 7 years' experience in software engineering or related occupation. Position is based at Hirezon's Westborough, MA office and is not a remote position. On-site presence is required five (5) days per week. Application Instructions: To apply for this position please click "apply now". Please submit the resume and cover letter online PI