Cristhian Melo

I'm a software engineer who likes building things and figuring out how they work under the hood. I've worked on web, desktop, and mobile apps. I enjoy the whole process: from design and frontend work to backend systems, data, and infrastructure. I care especially about software architecture and writing code that's easy to maintain.

I've used Linux for over a decade. Two ideas from that world have stayed with me: keep things simple and do a good job of whatever I take on. I try to bring both to the software I build.

Lately, I've been tinkering with Rust and pitching in on open-source projects.

Why rxtsel? It started as "ratsel": easy to say, easy to remember. But the usernames and domains I wanted were taken, so I swapped the "a" for an "x". I thought people would still pronounce it the same way. Turns out most people just spell it out. Fair enough.

Projects

Experience

  1. SoundAdvice

    Toronto, Canada · Remote

    Full Stack Developer

    Lead full stack development for a music mentorship platform with online and in-person events, mentor booking, payments, streaming, courses, community, and internal administration.

    • Designed modular architecture with DDD, SOLID, testing, ports/adapters, and CI/CD to support product growth.
    • Built public Stripe checkouts with webhooks, idempotency, rate limits, and full purchase traceability.
    • Integrated private streaming with Cloudflare Stream/R2, signed URLs, and recorded event conversion into masterclass-style content.
    • Implemented a Rust-powered community engine with SSO, identity mapping, and private room access based on purchases, events, and permissions.
    • Azure
    • Docker
    • GitHub Actions
    • Linux
    • Redis
    • Vitest
    • TypeScript
    • Next.js
    • PostgreSQL
    • Tailwind CSS
    • Stripe
    • Rust
    • Drizzle
    • Playwright
    • Supabase
    • Git
    • CI/CD
    • SOLID
    • Clean Architecture
    • Runbooks
    • REST
    • OpenAI
    • Cloudflare Stream
    • R2
    • DevOps

    Frontend Developer

    Turned Figma designs into a pixel-perfect landing page and improved core product flows across mentors, booking, emails, notifications, contests, and progressive legacy migration.

    • Next.js
    • Tailwind CSS
    • Vitest
    • TypeScript
    • shadcn/ui
    • Git
    • Figma
    • Extreme Programming
    • WPO
  2. Visual Dealers

    Los Angeles, California · Remote

    Frontend Developer

    Built landing pages, e-commerce sites, WordPress websites, and digital campaigns with focus on UI, performance, and conversion, raising Lighthouse scores from ~40 to 96-100 on key projects.

    • CSS
    • Figma
    • PHP
    • WordPress
    • JavaScript
    • MySQL
    • WPO
    • Email Marketing
  3. Vehement

    Bogotá, Colombia · Remote

    Frontend Developer

    Built corporate sites, landing pages, dashboards, CMS workflows, bots, and SEO-first web experiences, improving Core Web Vitals, indexation, and migration from ZIP/Drive handoffs to GitHub and CI/CD.

    • Astro
    • Next.js
    • Tailwind CSS
    • Git
    • WordPress
    • TypeScript
    • Strapi
    • MySQL
    • Figma
    • CSS
    • CI/CD
    • WPO
    • SEO
    • Bots

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