Full Stack Developer - REMOTE ONLY MEXICO About ScalepexScalepex is a nearshore partner that empowers businesses to scale efficiently and effectively through exceptional services. With a strong focus on customer success, innovation, and cultural alignment, we support companies in building high-performing teams across industries.At Scalepex, we believe in fostering an environment where our people can thrive, grow their careers, and make a real impact.About the RoleWe are looking for a Full Stack Developer to join a high-impact team building a Partner Marketplace platform from the ground up.This is a hands-on full-stack engineering role. You will be embedded in a small, senior team, working across backend services, frontend applications, and cloud infrastructure. You will own real features end-to-end from API contracts to UI components to deployment pipelines and you will be expected to move fast without breaking things.Key Responsibilities 🔹 Backend DevelopmentScaffold and develop new Node.js services: Catalog, Order, Store, Payment, and Admin BFFFork and adapt existing Auth, User, Notification, and Customer Support services for the marketplace contextExtract and reuse cart logic, Stripe integration, and store management patterns from existing production codeDesign and implement REST APIs with clear contracts (OpenAPI), proper versioning, authentication, and error handlingBuild Ordering Platform Partner API integration for user account creation, order sync, and catalog ingestionImplement Redis caching, Kafka event handling, and async processing patterns where appropriateWrite database migrations and manage MySQL schemas across services🔹 Frontend DevelopmentBuild the customer-facing React/Next.js web application: product browsing, cart, checkout, order confirmation, and account managementBuild the admin dashboard: order management UI, product toggle controls, customer lookup, and metrics viewsImplement Stripe payment flows including payment intent creation, form handling, and webhook-driven confirmationIntegrate Firebase Auth for authentication flows and Firebase Cloud Messaging for push notificationsEnsure mobile-responsive, accessible, and performant UI across all surfacesManage client-side state using Zustand or TanStack Query as appropriate to the data type🔹 Infrastructure & QualitySupport CI/CD pipeline setup and maintenance using GitHub Actions and AWS servicesWrite unit, integration, and end-to-end tests targeting 80% code coverage on critical pathsParticipate in code review, architectural discussions, and technical planning sessionsContribute to observability setup: structured logging, alerting, and monitoring configurationSupport load testing, performance optimization, and UAT coordination in Phases 4 and 5Must have 3–5 years of experience as a Full Stack Developer Strong experience with Node.js + React Experience building REST APIs Solid understanding of microservices architecture Experience with SQL databases (MySQL) Familiarity with cloud environments (AWS) Experience with payment integrations (Stripe is a plus)Nice to Have Marketplace or e-commerce experience Kafka or event-driven systems Kubernetes Elasticsearch / OpenSearch Terraform or Infrastructure as CodeContractor scheme100% Remote About ScalepexScalepex is a nearshore partner that empowers businesses to scale efficiently and effectively through exceptional services. With a strong focus on customer success, innovation, and cultural alignment, we support companies in building high-performing teams across industries.At Scalepex, we believe in fostering an environment where our people can thrive, grow their careers, and make a real impact.About the RoleWe are looking for a Full Stack Developer to join a high-impact team building a Partner Marketplace platform from the ground up.This is a hands-on full-stack engineering role. You will be embedded in a small, senior team, working across backend services, frontend applications, and cloud infrastructure. You will own real features end-to-end from API contracts to UI components to deployment pipelines and you will be expected to move fast without breaking things. Key Responsibilities 🔹 Backend DevelopmentScaffold and develop new Node.js services: Catalog, Order, Store, Payment, and Admin BFFFork and adapt existing Auth, User, Notification, and Customer Support services for the marketplace contextExtract and reuse cart logic, Stripe integration, and store management patterns from existing production codeDesign and implement REST APIs with clear contracts (OpenAPI), proper versioning, authentication, and error handlingBuild Ordering Platform Partner API integration for user account creation, order sync, and catalog ingestionImplement Redis caching, Kafka event handling, and async processing patterns where appropriateWrite database migrations and manage MySQL schemas across services🔹 Frontend DevelopmentBuild the customer-facing React/Next.js web application: product browsing, cart, checkout, order confirmation, and account managementBuild the admin dashboard: order management UI, product toggle controls, customer lookup, and metrics viewsImplement Stripe payment flows including payment intent creation, form handling, and webhook-driven confirmationIntegrate Firebase Auth for authentication flows and Firebase Cloud Messaging for push notificationsEnsure mobile-responsive, accessible, and performant UI across all surfacesManage client-side state using Zustand or TanStack Query as appropriate to the data type🔹 Infrastructure & QualitySupport CI/CD pipeline setup and maintenance using GitHub Actions and AWS servicesWrite unit, integration, and end-to-end tests targeting 80% code coverage on critical pathsParticipate in code review, architectural discussions, and technical planning sessionsContribute to observability setup: structured logging, alerting, and monitoring configurationSupport load testing, performance optimization, and UAT coordination in Phases 4 and 5Must have 3–5