SEBASTIAN MENDO LOPEZ
Senior Software Engineer · Full Stack & Automation Specialist
Peru · Open to US Remote · +51 984 381 904 · sebastian.mendo1995@gmail.com · sebastianmendo.com · seguipro.com · GitHub · LinkedIn
Professional Summary

Senior Software Engineer with 5+ years of experience building production-grade automation systems, scalable web applications, and SaaS products. Specializes in browser automation architecture (Playwright, Puppeteer), modern React/Next.js frontends, and full-stack TypeScript engineering. At iVisa, reduced manual operations workload by 60%+ through enterprise-scale automation serving thousands of global visa applicants. Independently architected and shipped SeguiPro — a production CRM SaaS platform — owning the full stack from data model to deployment. Leverages AI-assisted development workflows to accelerate engineering velocity and prototype faster. Known for deep technical ownership, autonomous execution, and delivering measurable business impact.

Technical Skills
Languages:TypeScript, JavaScript (ES6+)
Automation:Playwright, Puppeteer, Browser Automation, Chrome Extensions, Web Scraping
Frontend:React, Next.js 14, Tailwind CSS, HTML5, CSS3
Data & Storage:Firestore (NoSQL), MongoDB, SQL, PostgreSQL
Backend:Node.js, Express, REST APIs, Firebase (Firestore · Auth · Functions)
DevOps & Cloud:Git, Vercel, CI/CD Pipelines, Webpack
Payments & SaaS:Stripe, OAuth 2.0, Multi-tenant Architecture, SaaS Subscriptions
AI & Workflow:AI-assisted development (Claude, GitHub Copilot), Rapid Prototyping
Professional Experience
Senior Software Engineer — iVisa
2022 – Present
Remote  ·  Travel-Tech SaaS  ·  Series B  ·  Visa processing at global scale
  • Architected a fleet of production automation bots using Playwright and Puppeteer, processing government visa form submissions at scale — reducing manual operations workload by 60%+ and eliminating thousands of hours of repetitive processing annually.
  • Owned the full product lifecycle of an internal Chrome Extension used daily by operations teams: designed the architecture, shipped 30+ production features, and maintained secure REST API bridges to the core platform.
  • Reverse-engineered and modernized a legacy automation pipeline — improving reliability, observability, and long-term maintainability — eliminating recurring production failures that previously required manual intervention.
  • Designed and implemented high-throughput REST API integrations between the core platform and browser automation layer, enabling real-time data flows for mission-critical, high-volume visa processing workflows.
  • Partnered cross-functionally with product, operations, and engineering to translate complex business workflows into scalable automated systems, directly reducing operational overhead and increasing team throughput.
Founder & Full Stack Engineer — SeguiPro
2023 – Present
seguipro.com  ·  Independent SaaS  ·  CRM platform purpose-built for sales teams
  • Sole architect and engineer of SeguiPro — designed and shipped an entire production CRM SaaS platform from zero, including multi-tenant architecture, authentication, real-time data sync, and Stripe payment infrastructure.
  • Built the full stack using Next.js 14, TypeScript, Firebase (Firestore + Auth), and Tailwind CSS, deployed on Vercel with automated CI/CD pipelines and environment-specific configuration.
  • Integrated Stripe subscription infrastructure supporting recurring billing, plan upgrades, and full customer lifecycle management — establishing a production-ready revenue model from day one.
  • Designed a scalable Firestore multi-tenant data model supporting isolated, per-team workspaces with real-time synchronization — architected for production scale, not MVP shortcuts.
  • Drove all product decisions — UX design, feature prioritization, authentication flows, onboarding, and deployment — demonstrating end-to-end ownership of both engineering and product strategy.
Software Engineer — Bombo Peru S.A.C.
2020 – 2022
Lima, Peru  ·  Digital product agency  ·  Multi-client production web applications
  • Spearheaded architecture and delivery of 40+ features across multiple production web applications, consistently executing on tight startup timelines.
  • Built type-safe, reusable component libraries in React + TypeScript that reduced frontend development time and improved engineering consistency across client projects.
  • Engineered third-party payment API integrations ensuring transaction reliability, security standards, and PCI-compliant data handling across production environments.
  • Developed backend REST APIs using Node.js and Express supporting internal tooling and client-facing product features across the full stack.
Education
App Academy — Fullstack Software Engineering
San Francisco, CA
2019
University of Piura — B.S. Industrial & Systems Engineering
Piura, Peru
2013 – 2018

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