{"id":4257818,"url":"https://alion.io/job/mercado-libre-software-engineer-mercado-pago","title":"Software Engineer - Mercado Pago","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":"A","score":90,"open_postings":74,"ghost_share":0.014,"stale_share":0.338,"repost_share":0.081,"time_to_fill_p50_days":37,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","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":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CAPA","optional":false},{"name":"React.js","optional":false},{"name":"Claude","optional":true},{"name":"JavaScript","optional":true},{"name":"Model Context Protocol","optional":true}],"status":"live","first_seen_at":"2026-11-13T12:40:49Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-13T14:21:50Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"¡Hace historia en la democratización del comercio y de los servicios financieros, transformando la vida de millones de personas en América Latina con Mercado Libre!\nConstruye experiencias conversacionales agénticas de punta a punta para el chat de Mercado Pago. En este rol, el foco está en frontend y en convertir una experiencia de soporte en una banca personal potenciada por agentes de inteligencia artificial.\nEn Mercado Pago estamos construyendo Personal Banker como un producto para nuestros usuarios. El equipo trabaja en un entorno agéntico con repositorios, skills versionadas, evaluaciones automáticas y observabilidad, pensado para que personas y agentes construyan juntos. La posición está calibrada en nivel semi senior y requiere experiencia con React. La versatilidad técnica es importante: el equipo trabaja sobre distintas capas según lo que necesite el producto. Los conocimientos de Go son deseables.\nDesafíos:\nDiseñar e implementar experiencias conversacionales agénticas de punta a punta sobre el chat de Mercado Pago.\n\nConstruir arquitecturas con planificación multipaso, uso de herramientas, memoria, guardrails y evaluaciones automáticas.\n\nLlevar funcionalidades desde el problema de producto hasta su métrica en producción.\n\nIterar con observabilidad sobre el comportamiento de los modelos y contribuir a definir prácticas para construir con agentes como colaboradores.Experiencia y conocimientos:\n\nAprender con agilidad en base a desafíos, potenciándote con tecnología y GenAI.\n\nApasionarse por salir de la zona de confort, dar el máximo, superar los propios límites y emprender en un ambiente sano, alegre y divertido.\n\nContar con 4 años de experiencia en posiciones similares y experiencia integrando LLMs en productos.\n\nContar con experiencia en frontend con React y fundamentos sólidos de arquitectura, patrones frontend, plataforma web y performance.\n\nTener criterio para resolver problemas ambiguos y curiosidad por la IA agéntica; se valorarán Go, servidores MCP, skills de Claude, RAG y experiencia en fintech o productos sensibles.Conoce más sobre nuestra cultura y negocio en nuestro Career Site.\n\n¡Lo mejor está llegando!\nHíbrido. 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