Senior Full Stack Software Engineer

We are looking for Senior Fullstack Software Engineers (Frontend-focused) to join FusionHit's fast-paced, high-impact environment supporting. In this role, you will lead UI modernization initiatives for enterprise retail and supply chain systems, driving architecture decisions and elevating frontend 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 applications while collaborating closely with backend engineers building Java/Spring Boot services, 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) Requirements BS/MS in Computer Science, Software Engineering, or related field6+ years of experience in Fullstack/Frontend Engineering5+ years of hands-on experience with modern JS/TS frontend frameworks (React, Next.js, Angular, or Vue) - our stack spans multiple frameworks across projectsAdvanced expertise in TypeScript, including complex type modeling and scalable architecture patternsExperience designing and maintaining shared component libraries and design systemsWorking knowledge of Java/Spring Boot backend services and Postgres-backed REST APIs, sufficient to integrate and troubleshoot end-to-endStrong understanding of phased modernization strategies over legacy backend systemsDeep experience with Playwright (E2E) and Jest (unit testing)Experience managing CI/CD pipelines in GitLabExperience implementing monitoring and observability strategies using DatadogRetail, store operations, or supply chain system experience (strong plus)Comfortable engaging with stakeholders and incorporating real-world user feedbackBonus: Android and/or iOS frontend experienceExcellent communication skills in English (C1 preferred, strong B2 may be considered) Key Responsibilities Lead frontend architecture decisions and modernization strategy across multiple JS framework stacksDesign scalable UI solutions and integrate with Java/Spring Boot APIsDrive best practices in code quality, testing, and CI/CD automationCollaborate cross-functionally with backend, DevOps, and product teamsMentor mid-level engineers and promote engineering excellenceDefine testing strategies using Playwright and JestEnsure performance optimization and monitoring using DatadogLead phased migration from legacy systems to modern frontend architectureIncorporate user feedback and real-world retail workflows into UI improvements Benefits Certified as a Great Place to Work, offering a supportive and inclusive work cultureWork from home positionPersonal and Professional Development Courses & CertificationsFlexible Schedule3 Sick Days per yearBirthday OffExtra Days for Special OccasionsTeam Building Meal ReimbursementEquipment GrantedMonthly RecognitionsHigh Impact Committees