{"id":1216832,"url":"https://alion.io/job/mercado-libre-senior-software-engineer-frontend-cards-nfc","title":"Senior Software Engineer Frontend - Cards NFC","company":{"id":237,"name":"Mercado Libre","domain":"mercadolibre.com","url":"https://alion.io/company/mercado-libre","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Eightfold","truth_index":{"grade":"B","score":84,"open_postings":64,"ghost_share":0.016,"stale_share":0.563,"repost_share":0.047,"time_to_fill_p50_days":36,"computed_at":"2026-10-20T05:45:00Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Buenos Aires, Argentina"],"countries":["AR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Express","optional":false},{"name":"Git","optional":false},{"name":"Jest","optional":false},{"name":"Jira","optional":false},{"name":"Node JS","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-21T19:22:38Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-10-20T14:47:05Z","board_verified":true,"closed_at":null,"days_open":28,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":28},"description":"Descripción breve\nComo Senior Frontend Software Engineer en Mercado Libre, diseñarás y escalarás sistemas innovadores y seguros que resuelven problemas reales y de alto impacto. Trabajarás en un entorno dinámico con tecnología de vanguardia, aplicando buenas prácticas de ingeniería, modelos de IA propios y aprendizaje continuo, con el propósito de democratizar el comercio electrónico y los servicios financieros en América Latina.\nImagináte emprendiendo proyectos desafiantes, dinámicos e innovadores y siendo responsable de:\nDesarrollar y mantener soluciones end-to-end de alta calidad para múltiples productos.\n\nEntender desafíos de negocio y proponer mejoras centradas en la experiencia de usuario.\n\nColaborar con Producto y UX para relevar necesidades y definir soluciones técnicas y funcionales.\n\nDiseñar métricas, estrategias de rollout progresivo y soporte para aplicaciones regionales.\n\nImpulsar la evolución técnica mediante revisiones de código, buenas prácticas y mentoría.\n\n¿Qué buscamos en vos?\nDominar lenguajes como React, TypeScript y Node.js.\n\nPoseer experiencia en SSR, arquitecturas por componentes y ciclo de vida de aplicaciones.\n\nContar con conocimiento de testing con Jest y React Testing Library.\n\nTener experiencia con Express.js, webhooks e integraciones frontend-backend.\n\nConocer sobre SOLID, Clean Code, observabilidad, Git y Jira.\n\n¿Te animás a dejar huella en la tecnología de América Latina?\n¡Postulate y sumate a nuestro propósito!\nModalidad de trabajo híbrida. 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