Get in touch

Available for freelance work

Full-stack engineer for SaaS, AI workflows, and real-time systems.

I build enterprise-grade platforms with TypeScript, React, and cloud infrastructure — integrating LLMs, vector search, and SSO without sacrificing code quality or system design.

Tools I work with every day

  • React
  • Remix
  • TypeScript
  • Node.js
  • Tailwind CSS
  • MongoDB
  • Redis
  • AWS
  • Docker
  • FastAPI
  • Pinecone
  • Sanity

Selected work across SaaS, real-time systems, and front-end delivery

Recent projects where I owned architecture, implementation, or end-to-end delivery — from enterprise platforms to fleet management and client-facing front-end work.

Murmuratto

Case study

AI platform for regulated manufacturing leaders

Enterprise SaaS that captures frontline insights, drives compliance, and surfaces decision-ready intelligence for engineering leaders in life sciences and advanced manufacturing.

  • Remix
  • React
  • TypeScript
  • TanStack Query

Personify Health

Case study

Enterprise health platform web experience

Marketing pages and blog for a global digital health platform — hybrid WordPress and React delivery with performance optimization.

  • React
  • TypeScript
  • WordPress
  • Twig

Johnnie-O

Case study

Premium Shopify commerce storefront

High-performance golf and lifestyle e-commerce built on Shopify Hydrogen — pixel-perfect Figma implementation for a premium retail brand.

  • React
  • TypeScript
  • Shopify Hydrogen
  • Tailwind CSS

Outreach

Case study

Agentic AI platform marketing experience

Pixel-perfect front-end for Outreach’s agentic AI revenue platform — enterprise landing pages, product storytelling, and conversion-focused UI.

  • React
  • TypeScript
  • Tailwind CSS
  • SASS

DAWG Motors

Case study

Real-time fleet platform and EV product launch

Micromobility fleet management with live vehicle tracking, in-app chat, and a product launch site for IoT-backed asset optimization.

  • React
  • TypeScript
  • WebSockets
  • Mapbox

Ergeon

Case study

Outdoor construction quoting at national scale

Contributed to a production platform with 3D fence quoting, live video estimates, and thousands of verified customer reviews across the US.

  • React
  • TypeScript
  • Redux
  • Jest

I use AI as a development accelerator — not a shortcut around engineering fundamentals. The goal is always software that holds up in production: typed, tested, observable, and built for the team that maintains it.

Lisandro Seia

Full-Stack Software Engineer

Services - Full-stack engineering for products that need to ship and scale.

I work with founders and teams who need someone who can own the stack — from UI polish to auth, APIs, AI integrations, and deployment.

Laptop showing a web application interface
  • Single Page Applications. Modern, fast SPAs with React or Remix — from lean MVPs to enterprise platforms with SSR, data fetching, and polished UX.
  • SaaS Development. Multi-tenant architectures, executive dashboards, SSO, role-based access control, and real-time data systems built to scale.
  • SEO, Accessibility & Performance. Audits and fixes for existing sites: Core Web Vitals, WCAG compliance, Lighthouse scores, semantic HTML, and modern web standards.
  • Landing Pages. High-converting, pixel-perfect pages from Figma — shipped fast, with strong performance scores and clean handoff.
  • CRM Integrations. Connect HubSpot, Attio, and other CRMs to your site — automated lead capture, pipeline updates, and email flows.

Have a project in mind?

Tell me what you are building — SaaS, landing page, audit, or CRM integration. I will get back to you within one business day.

Get in touch

Direct contact

lisandroseia11@gmail.comLinkedIn