Senior Software Engineer
Automation systems. Frontend architecture. SaaS products.
I build production-grade systems that handle real load — browser automation at scale, modern React/Next.js platforms, and full-stack SaaS products. Currently at iVisa, where I've reduced manual operations by 60%+ through enterprise automation.
Remote · Travel-Tech SaaS · Series B
- 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 and eliminating recurring production failures that previously required manual intervention.
- Designed 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.
Independent SaaS · CRM platform for sales teams
- Sole architect and engineer — designed and shipped an entire production CRM SaaS from zero, including multi-tenant architecture, authentication, real-time data sync, and Stripe payment infrastructure.
- Built the full stack with Next.js 14, TypeScript, Firebase (Firestore + Auth), and Tailwind CSS, deployed on Vercel with automated CI/CD pipelines.
- Integrated Stripe subscription infrastructure supporting recurring billing, plan upgrades, and full customer lifecycle management — production-ready revenue model from day one.
- Designed a scalable Firestore multi-tenant data model supporting isolated per-team workspaces with real-time synchronization.
Software Engineer
·Bombo Peru S.A.C.Lima, Peru · Digital product agency
- Delivered 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 and PCI-compliant data handling.
SeguiPro
Production CRM SaaS for sales teams
A full-stack CRM platform purpose-built for sales teams. Designed, architected, and shipped end-to-end as a solo engineer — from multi-tenant data modeling to subscription infrastructure. Built for real users, real scale, and real revenue.
Engineering challenge
Designed a scalable multi-tenant Firestore architecture where team data stays completely isolated, real-time sync works across all clients simultaneously, and subscription tiers cleanly gate feature access — all owned and maintained by a single engineer.
Architecture
Multi-tenant SaaS
Auth
Firebase Auth
Payments
Stripe subscriptions
Real-time
Firestore sync
Deployment
Vercel + CI/CD
Frontend
Backend
Automation
Data & Storage
Infrastructure
Payments & Auth
Actively leverages AI-assisted development workflows (Claude, GitHub Copilot) for engineering acceleration, rapid prototyping, and debugging — treating AI as a force-multiplier for shipping production code faster.
I'm a Senior Software Engineer with 5+ years of experience building production automation systems, scalable SaaS products, and modern frontend platforms. My work sits at the intersection of engineering depth and product thinking.
At iVisa, I architect the automation infrastructure that processes visa applications at global scale. Independently, I designed and shipped SeguiPro — a production CRM SaaS with multi-tenant architecture, Stripe subscriptions, and real-time sync, built and maintained as a solo engineer.
I work well autonomously, move fast without cutting corners, and care about the business outcomes behind every system I build. I thrive in environments where engineering ownership is valued.
Education
App Academy
Fullstack Software Engineering · 2019
University of Piura
B.S. Industrial & Systems Engineering · 2018
Let's work together.
I'm open to senior engineering roles — remote-first, US companies, SaaS startups, and automation-heavy teams. If you're building something interesting, I'd like to hear about it.
sebastian.mendo1995@gmail.com