melendez.dev

Automation of Complex Processes

I'm Daniel, a fullstack software engineer. I build custom systems that eliminate repetitive manual work in industrial companies. Co-founder of Oxen Digital, based in Antofagasta, Chile.

Technical Ecosystem

TypeScriptReact.jsAstroNode.jsNext.js
Connect on LinkedInView GitHub

My experience

Experience

Co-founder & Fullstack Software Engineer

Logo de Oxen DigitalOxen DigitalAntofagasta, Chile • Remote
1 year and 5 months
  • I manage the entire B2B software development lifecycle, from architecture to production deployment, prioritizing scalability and return on investment.
  • I automated business workflows by building a corporate intranet. I developed a calculation engine that reduced quote generation time to less than 1 minute (React, Node.js, Supabase).
  • I designed and implemented the AGPIA Industrial Park’s web ecosystem (Astro, Tailwind), integrating an automated lead capture workflow that operates 24/7 and leading the way in local SEO rankings.
ReactAstroNode.jsSupabaseTailwind CSSTypeScript

Fullstack Developer

Logo de DP-FIRE Chile SpADP-FIRE Chile SpAAntofagasta, Chile • On-site
2 years and 4 months
  • I optimized web platform infrastructure, reducing fixed hosting costs by 89% (~$492 USD annual savings) by migrating to a hybrid serverless model at the Edge and active usage billing (Railway/Cloudflare/Turso).
  • I led the document automation of critical operations under time pressure, developing a dynamic template engine that generated more than 400 technical protocols in seconds from Excel spreadsheets. This dramatically accelerated project closure and billing.
  • I developed scripts to extract data from client PDFs to automate the signing, review, and completion of pending documents, eliminating hundreds of hours of manual work and earning direct recognition from the client and the team.
  • I redesigned the corporate intranet, migrating to a hybrid Edge microservices architecture (Cloudflare Workers Hono + Express) with Edge databases (Turso/libSQL), applying Clean Architecture, DDD, TDD (Vitest), and CI/CD (GitHub Actions).
  • I migrated the corporate e-commerce to Next.js coupled with Payload CMS v3 and Turso (SQLite Edge), eliminating the need for expensive dedicated servers and reducing CMS hosting cost to $0 USD.
  • I improved the security and UX of the platforms by integrating 2FA authentication, real-time catalogs, and predictive search engines (Algolia).
Next.jsReactNode.jsPayload CMSCloudflare WorkersTurso (libSQL)Drizzle ORMClean ArchitectureDomain-Driven DesignVitest (TDD)GitHub ActionsTailwind CSSAlgolia

IT Applications Developer - Trainee

Logo de Puerto AngamosPuerto AngamosMejillones, Chile • On-site
2 months
  • I automated the generation of operational reports by replacing manual analysis in spreadsheets with Python scripts (Pandas, NumPy).
  • I implemented EDI messaging for data synchronization and participated in CI/CD workflows using Azure DevOps and Git.
PythonPandasNumPyAzure DevOpsGit

My Success Stories

Projects

2026Hackathon IACCProject preview: Smart Recording of Clinical Interventions (Talita Kum)Smart Recording of Clinical Interventions (Talita Kum)Offline-First PWA designed for therapists to record clinical interventions in corridors via voice dictation in seconds.
2025Corporate WebProject preview: Corporate Website: AGPIA Industrial ParkCorporate Website: AGPIA Industrial ParkCustom web platform development to establish the AGPIA Industrial Park's online presence and authority.
2026EcommerceProject preview: E-commerce: DP-FIREE-commerce: DP-FIREMigration and redesign of B2B e-commerce to Next.js coupled with Payload CMS v3 and Turso (SQLite Edge), optimizing infrastructure.
2026Custom SystemProject preview: Management System & Intranet: DP-FIREManagement System & Intranet: DP-FIREFull redesign of multi-company corporate intranet to a hybrid Edge microservices architecture to eliminate operational bottlenecks.
Hackathon IACC / 2026

Smart Recording of Clinical Interventions (Talita Kum)

Offline-First PWA designed for therapists to record clinical interventions in corridors via voice dictation in seconds.

Smart Recording of Clinical Interventions (Talita Kum)

Impact & Results

  • Offline-First: Temporary persistence in IndexedDB and Service Workers that syncs automatically when internet returns.

  • IA Human-in-the-loop: Transcription via Whisper and structuring into 5 clinical fields using GPT-4o-mini with human validation.

  • Cybersecurity: Full and immediate local cache destruction after sync to prevent medical data exposure.

Tech Stack

Next.jsTurso (libSQL)OpenAITypeScriptTailwind CSS
View Architecture / Case StudyVisit Live Project
Corporate Web / 2025

Corporate Website: AGPIA Industrial Park

Custom web platform development to establish the AGPIA Industrial Park's online presence and authority.

Impact & Results

  • #1 in Local Search: Absolute dominance on Google for industrial sector searches in the region.

  • 24/7 Lead Generation: Continuous and automated reception of qualified prospects inquiring about warehouse availability.

  • 100% Custom: Clean and modern codebase, designed to load in milliseconds and optimized for conversion.

Tech Stack

AstroReactTailwindResend
Visit Live Project
Ecommerce / 2026

E-commerce: DP-FIRE

Migration and redesign of B2B e-commerce to Next.js coupled with Payload CMS v3 and Turso (SQLite Edge), optimizing infrastructure.

Impact & Results

  • Financial Savings: Reduced fixed hosting costs of CMS and database to $0 USD (previously $39/mo).

  • Coupled Architecture: Payload CMS v3 integrated directly into Next.js App Router as a native route.

  • Edge Database: Migration from Neon PostgreSQL to Turso (libSQL) global distributed replicas with minimal latency.

Tech Stack

Next.jsPayload CMSTurso (libSQL)Drizzle ORMTailwind CSS
View Architecture / Case StudyVisit Live Project
Custom System / 2026

Management System & Intranet: DP-FIRE

Full redesign of multi-company corporate intranet to a hybrid Edge microservices architecture to eliminate operational bottlenecks.

Impact & Results

  • Hybrid Edge Architecture: Cloudflare Workers gateway for lightweight flows and Express on Railway for heavy processing (PDF/Excel).

  • Clean Architecture: Complete decoupling of media storage (R2/S3) using Ports and Adapters.

  • Robustness and CI/CD: Automated testing suite with Vitest (TDD) and continuous deployment pipeline via GitHub Actions.

Tech Stack

ReactCloudflare WorkersExpressTurso (libSQL)Drizzle ORMVitestGitHub Actions
View Architecture / Case Study

My company

Oxen Digital

I work with companies through Oxen Digital, where we automate manual processes for mining suppliers and contractors in northern Chile: quoting, dispatch, inventory, technical documentation and more. We measure the process before and after, and the client owns 100% of the code.

Visit Oxen Digital

Testimonials

Testimonials

"I am extremely grateful for the opportunity to have worked with Daniel; he has always been a great asset in identifying improvement opportunities and developing solutions tailored to user needs. A great example of this is the intranet he developed at DPF... which facilitated communication and eliminated the data loss caused by the old Excel registration process."
Marianela BarreraCommercial Engineer
"We didn't exist on the internet. Oxen put us on the map in Antofagasta... We went on to lead Google searches, and today we receive constant inquiries from clients looking for services, products, and warehouse availability."
Sara Sofia
Sara SofiaAdministrator, AGPIA Industrial Park

About me

MY PHILOSOPHY

About me

I'm a fullstack software engineer focused on eliminating repetitive manual work inside companies. Quotes that take hours, spreadsheets only one person knows how to use, information lost in email threads: that's where I come in.

I care about software that shows up in the business, not just in the repository. That's why I measure processes before and after, and design for the people who use the tool every day, including those who aren't digital natives.

I co-founded Oxen Digital to do this with industrial companies in northern Chile.

Read more about me

Latest Case Studies

Latest Case Studies

Technical articles, software architecture insights, and development/automation strategies.

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Recommended Resources

Recommended Resources

A curated collection of tools, tutorials, repositories, and articles that I find valuable.

Explore all resources
Frontend Development

AdventJS

Daily programming challenges in JavaScript and TypeScript created by Midudev to improve your programming logic skills.

WEBSITEVisit resource
Design & Architecture

Excalidraw

A virtual whiteboard for sketching diagrams with a hand-drawn style. Ideal for capturing ideas, diagrams, and more.

WEBSITEVisit resource
Community & Learning

Fazt Tech

YouTube channel featuring practical programming tutorials, web development, databases, and developer tools.

YOUTUBEVisit resource

Certifications

Recent Certifications

Platzi2026

Advanced Next.js Course

Platzi2025

JavaScript Fundamentals

Platzi2025

Tailwind CSS

Let's connect

Get in touch

Have a proposal, want to connect, or learn more about me? Drop me a message and I'll get back to you as soon as possible.