# Xein Deniel

Xein Deniel is a full-stack engineer based in the Philippines, specializing in high-performance interfaces, thoughtful motion, and polished web experiences.

Site: https://xeind.net/
Contact: xd@xeind.net

## Experience

### Full-Stack Engineer, Pioneer Dev AI (Dec 2025 – Now)

Boulder, Colorado · https://www.pioneerdev.ai/

Owning frontend infrastructure for an operator management system, and building the data-intensive React and Remix interfaces that run on it

Stack: TypeScript, React, Astro, Prisma

### Full-Stack Developer – Intern, ChatGenie (Aug 2025 – Sep 2025)

Pasig City, Metro Manila · https://www.chatgenie.ph/

Trained in advanced Gen AI prompting techniques including chain-of-thought and multi-agent systems, and explored Azure AI services for model deployment

Stack: Ruby on Rails, Vue.js, GraphQL

### Developer – Intern, Creative Dynamix, Inc. (Aug 2024 – Sep 2024)

Pasig City, Metro Manila · https://www.cdynamix.net/

Worked as an Intern, developing and maintaining finance modules in Microsoft Dynamics 365 using X++, resolving bugs and optimizing workflows

Stack: Microsoft Dynamics 365, X++

## Projects

### Vallow (Personal, 2026)

Lazygit-style terminal UI for [fallow](https://docs.fallow.tools "Rust static-analysis engine") findings: dead code, duplicates and complexity, with a code preview.

Began as a native Neovim split in Lua; the Go rewrite runs anywhere a terminal does.

Built with: Go, Rust, Lua, Neovim

https://github.com/xeind/vallow · Neovim Plugin: https://github.com/xeind/vallow.nvim

### Nightingale (Personal, 2025)

Warm contrast theme for [Zed](https://zed.dev/extensions/nightingale) and [Neovim](https://github.com/xeind/nightingale.nvim).

Dark and light variants with full TreeSitter support for Neovim.

Built with: Zed, Neovim, Lua, TreeSitter

https://zed.dev/extensions/nightingale

### ATAX (Personal, 2024)

Chaotic-map encryption scheme achieving high diffusion, randomness, and strong security.

Validated with Entropy 7.9982, UACI 33.46%, NPCR 99.61%, Correlation -0.0008, and 21ms runtime.

Built with: TypeScript, Python, React, Docker

### Pioneer Dev (Client, 2026)

Redesigned the landing page end to end: new themes, a rebuilt stack, and a move to [Astro](https://astro.build).

Lighthouse performance above 98.

Built with: Astro, TypeScript

https://pioneerdev.ai

### Chozi (Client, 2026)

Server-rendered browse pages for every province, canton and zone on a [Next.js](https://nextjs.org) property marketplace, each in its own sitemap.

One linked JSON-LD graph, templated meta descriptions, one route-owned H1 per page, and a listing map that loads only near the viewport.

Built with: Next.js, React, TypeScript

https://chozi.com

### Match Guarantee (Client, 2026)

Replaced a WordPress booking page with [Astro](https://astro.build) funnels on Cloudflare: every step saves to D1 and syncs to GoHighLevel.

A/B-tested consultation funnels, an assessment engine and three calculators, with UTM and first-touch attribution on every lead.

Built with: Astro, Cloudflare, D1, TypeScript

https://matchguarantee.com

### Yield (Client, 2026)

Built with: React, TypeScript, Prisma

### filipinameet (Client, 2026)

Moved the marketing site off Framer and onto Astro.

Lighthouse performance score went from 67 to 90.

Built with: React, TypeScript

https://filipinameet.com

### slavicmeet (Client, 2026)

Owned the landing page end to end.

Holds a Lighthouse performance score of 85.

Built with: Astro, Tailwind, Cloudflare

https://slavicmeet.app

## Recognition

- **Claude for Open Source** — Anthropic, Program (2026). Claude Max 20x, free for six months, for maintainers and contributors keeping the open-source ecosystem running. Accepted on vallow.nvim. · https://claude.com/contact-sales/claude-for-oss
- **DEP Engineering Program** — Data Engineering Pilipinas, Cohort (2026). A six-month build sprint where selected builders ship a public GitHub project, a real data pipeline, and a deployable dashboard. · https://dataengineeringpilipinas.github.io/dep-data-engineering-open-track/

## Writing

- [Moving from tmux to herdr](https://xeind.net/blog/tmux-to-herdr.md): I moved from tmux to herdr in an afternoon and spent the evening debugging one dropped keystroke. The bug was in my hand, not the software.
- [vallow Got Me Into Claude for Open Source](https://xeind.net/blog/claude-for-open-source.md): Over a year ago I didn't know what a dotfile was. Then I built a Neovim plugin nobody asked for, put it online, and it opened a door I didn't know existed.
- [My Hyper Key ✦](https://xeind.net/blog/hyper-key.md): Caps Lock is the most wasted key on the keyboard. I turned it into a launcher for everything.
- [Why I Moved from Next.js to Astro](https://xeind.net/blog/nextjs-to-astro.md): I couldn't break past 95 on mobile PageSpeed. Astro gave me 100 across the board without sacrificing anything.

## Elsewhere

- Tools Xein Deniel uses: https://xeind.net/tools.md
- github.com: https://github.com/xeind
- twitter.com: https://twitter.com/xeinvi
- linkedin.com: https://linkedin.com/in/xeind