Software Engineer Sr Fullstack Frontend

MercadoLibre
Buenos Aires
Workplace: HybridFull timeFunction: Software EngineeringSkills: ["Product mindset","Developer Experience focus","Interdisciplinary teamwork","Technical English","Continuous learning"]

Design and scale secure, high-impact web systems that democratize e-commerce and financial services in Latin America. Build scalable, intuitive frontend interfaces with a focus on Developer Experience, performance, usability, and maintainability, and develop fullstack solutions integrating GenAI/LLMs, agents, and MCPs. Deliver end-to-end features by integrating RESTful APIs, microservices, and backend components while applying engineering best practices like componentization, automated testing, code reviews, and clean design.

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MercadoLibre
MercadoLibre
4 days ago

Software Engineer Sr Fullstack Frontend

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Source: Company careers pageValidated by: Fursa AI
Last checked: 31 minutes agoStatus: Live

Job Summary

Design and scale secure, high-impact web systems that democratize e-commerce and financial services in Latin America. Build scalable, intuitive frontend interfaces with a focus on Developer Experience, performance, usability, and maintainability, and develop fullstack solutions integrating GenAI/LLMs, agents, and MCPs. Deliver end-to-end features by integrating RESTful APIs, microservices, and backend components while applying engineering best practices like componentization, automated testing, code reviews, and clean design.
Location: Buenos Aires
Workplace: Hybrid
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Design and develop scalable, robust web interfaces prioritizing Developer Experience, performance, usability, and maintainability.
  • •Build frontend and fullstack solutions integrating GenAI, LLMs, agents, and MCPs with simple, modular, reusable experiences.
  • •Deliver end-to-end solutions integrating RESTful APIs, microservices, and backend components with product, data, backend, and machine learning teams.
  • •Apply engineering best practices including componentization, automated testing, code review, clean design, documentation, and development standards.
  • •Measure adoption, productivity, and impact metrics and continuously evolve solutions by adopting new technologies and trends.

Key Requirements

  • •Solid experience developing frontend applications with React, TypeScript, JavaScript, HTML, and CSS for scalable, performant, maintainable systems.
  • •Knowledge of frontend architecture, componentization, state management, testing, and interface design best practices.
  • •Experience integrating RESTful APIs with backend services and microservices, plus fullstack skills using Python, Node.js, or similar technologies.
  • •Hands-on with engineering practices and tools such as Git, CI/CD, unit testing, mocking, code review, and delivery best practices.
  • •Knowledge of or strong interest in GenAI and LLMs, with product mindset, Developer Experience focus, and the ability to work in interdisciplinary teams (technical English).
Skills:Product mindsetDeveloper Experience focusInterdisciplinary teamworkTechnical EnglishContinuous learning
Languages:English
Tech Stack:ReactTypeScriptJavaScriptHTMLCSSGenAILLMsAgentsMCPsRESTful APIsAPIsMicroservicesPythonNode.jsGitCI/CDUnit testingMockingCode review

Company Brief

MercadoLibre
Operates Latin America's leading e‑commerce marketplace and fintech ecosystem, offering online buying and selling, classifieds, payment processing, credit, and logistics services across multiple countries in the region.
Industry: Online Marketplaces
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: Buenos Aires, Argentina
Founded: 1999
Glassdoor
Glassdoor: 3.8
WebsiteLinkedIn