SENIOR FULLSTACK SOFTWARE ENGINEER (BACKEND-FOCUSED, JAVA/SPRING BOOT)

We are looking for Senior Fullstack Software Engineers (Backend-focused) to join FusionHit’s fast-paced, high-impact environment supporting. In this role, you will lead backend architecture and modernization initiatives for enterprise retail and supply chain systems built on Java/Spring Boot, driving design decisions and elevating engineering standards across teams, while remaining comfortable working across the stack. You will play a key role in transforming legacy platforms into scalable, maintainable, and performance-driven services while collaborating closely with frontend engineers (working across multiple JS frameworks), DevOps, and product stakeholders. This project focuses on modernizing enterprise-level retail systems that directly support business-critical store and supply chain operations. Location: Remote – Latin America (must reside and have work authorization in LatAm) Availability: Significant overlap with Mountain Standard Time (MST) • BS/MS in Computer Science, Software Engineering, or related field. • 6+ years of experience in Backend/Fullstack Engineering. • 5+ years of hands-on experience with Java and Spring Boot building enterprise-grade REST APIs and microservices. • Strong experience with Postgres-backed data layers and API design for high-traffic retail systems. • Working knowledge of modern JS/TS frontend frameworks (React, Next.js, Angular, or Vue), sufficient to integrate and troubleshoot end-to-end across our multi-framework frontend stack. • Strong understanding of phased modernization strategies over legacy backend systems. • Deep experience with automated testing for backend services (unit, integration, contract) and Playwright/Jest awareness for E2E coordination. • Experience managing CI/CD pipelines in GitLab. • Experience implementing monitoring and observability strategies using Datadog. • Retail, store operations, or supply chain system experience (strong plus). • Comfortable engaging with stakeholders and incorporating real-world user feedback. • Excellent communication skills in English (C1 preferred, strong B2 may be considered). Key Responsibilities • Lead backend architecture decisions and modernization strategy for Java/Spring Boot services. • Design scalable, secure REST APIs and microservices on Postgres-backed data stores. • Drive best practices in code quality, testing, and CI/CD automation. • Collaborate cross-functionally with frontend, DevOps, and product teams across multiple JS framework stacks. • Mentor mid-level engineers and promote engineering excellence. • Ensure performance optimization and monitoring using Datadog. • Lead phased migration from legacy backend systems to modern service architecture. • Incorporate stakeholder feedback and real-world retail workflows into system design. • Certified as a Great Place to Work, offering a supportive and inclusive work culture. • Work from home position. • Personal and Professional Development Courses & Certifications. • Flexible Schedule. • 3 Sick Days per year. • Birthday Off. • Extra Days for Special Occasions. • Team Building Meal Reimbursement. • Equipment Granted. • Monthly Recognitions. • High Impact Committees.