// ENGINEERING & DEVELOPMENT

Web Development & Automations

Solutions engineered from the ground up: native code, zero unnecessary dependencies, high performance, and automated workflows designed for real-world operations.

</> Available for Projects

Leandro Da Silva

"Leandrus" Remote · UTC-4

Engineering Philosophy Vanilla Web · Zero Bloat · Clean & Modular Code

Core Stack PHP 8+ · Vanilla JS · HTML5/CSS3 · MySQL · REST APIs

Automation & Data n8n Pipelines · Two-way Webhooks · Messaging Bots

Environments & Deploy Ubuntu / Linux Workstation · Git · Apache / Nginx

< 150 ms Ultra-Fast Load Native architecture without bloatware

100/100 Google Lighthouse SEO, Accessibility & Performance

+80% Operational Efficiency Via autonomous n8n workflows

0% Plugin Dependency Clean code maintainable for years

Services & Solutions

Custom software development and intelligent automation engineered to solve operational bottlenecks with speed and full control:

High-Performance Websites

Corporate sites, high-converting landing pages, and native e-commerce. Instant loading (<1s) and complete technical SEO optimization without vulnerable CMS plugins.

Advanced Technical SEO · 100% Core Web Vitals · Custom E-Commerce

Bespoke WebApps & Portals

Internal business tools, client portals, lightweight CRMs, and interactive platforms engineered precisely around your operational workflow.

Real-Time Dashboards · Secure Authentication · REST APIs

Workflow Automation with n8n

Connect your software stack and eliminate repetitive tasks. Autonomous WhatsApp/Telegram bots, real-time alerts, and continuous database synchronization.

Bi-Directional Webhooks · WhatsApp/CRM Integration · 24/7 Autonomy

Game Development & Simulation

2D/3D browser-native games, interactive physics loops, and simulated environments for brand gamification, marketing campaigns, or interactive entertainment.

HTML5 Canvas / WebGL · Real-Time Physics · Agile Prototyping

Projects & Case Studies

Native E-Commerce Platform (Proprietary Store)

Upcoming Launch

End-to-end proprietary online store engineered without heavy CMS or frameworks to ensure lightning-fast performance (<100ms TTFB), full inventory database control, and a lean custom admin portal.

Modern PHP architecture free of bloated third-party dependencies
Optimized MySQL database for real-time catalog and order tracking
Responsive native frontend built with HTML5, CSS3, and Vanilla JS

PHP 8 Vanilla JS MySQL CSS3 Moderno E-Commerce Nativo

Automated Commercial Inquiries Agent (n8n + API)

In Production

Autonomous routing pipeline linking website forms and messaging channels with store inventory databases. Resolves frequent customer questions, qualifies leads, and alerts on urgent orders in real time.

n8n workflow with Webhook triggers and structured JSON parsing
Messaging channel integration for instant customer replies and notifications
Real-time inventory synchronization and customer registration

n8n Workflow Webhooks REST API JSON Automatización 24/7

CRM Dashboard & Operational Telemetry

In Active Development

Lightweight web application for contact management, lead pipeline tracking, and real-time operations monitoring without recurring subscription bloat.

Modular architecture with dynamic real-time state synchronization
Sales lead lifecycle management and live interaction audit logs
High-contrast dark UI optimized for focused daily productivity

PHP Modular Vanilla JS Realtime State Dark UI WebApp CRM

Interactive Physics & Web Game Engine

Laboratory / Prototype

Interactive physics engine and simulation loop engineered for modern browsers. Focus on tire slip, vehicle acceleration, weight transfer, and consistent 60 FPS rendering.

Native HTML5 Canvas game loop without heavy third-party gaming bundles
Physics model for acceleration, braking dynamics, and weight distribution
Responsive multi-input controls and optimized frame-draw memory

HTML5 Canvas Game Loop 60 FPS Física Vectorial Simulación Web

Working Methodology

A transparent, predictable process with clear communication at every milestone:

Diagnosis & Requirements

We define exact technical scope, business objectives, and realistic timelines with zero hidden fees.

Architecture & Prototyping

Database schema design, data flow diagrams, and functional UI wireframes for your review before writing business logic.

Agile Development & QA

Clean, modular engineering with scheduled functional progress demos and rigorous load and performance benchmarking.

Deployment & Handover

Production deployment, server/DNS configuration, and full code handover with clear documentation so you stay in total control.

Engineering Philosophy

// 01 RENDIMIENTO

Native Performance

Leveraging modern browser standards and native language power before importing bulky libraries.

// 02 MANTENIBILIDAD

Maintainability & Zero Debt

Clean, modular architectures that last for years without breaking due to framework version churn.

// 03 AUTOMATIZACIÓN

Pragmatic Automation

Eliminating manual bottlenecks by interconnecting operational services to let code work for the business.

Technical Capabilities

Native Web Semantic HTML5, Modern CSS & Vanilla JS
Backend & Data PHP, MySQL & REST API design
Automation n8n pipelines, Webhooks & API integrations
Infrastructure Linux environments, lean deployments & web optimization

Commercial Inquiries & Estimates

24/7 AI Agent Deploying on VPS server

Chat with my AI Assistant (available 24/7) to scope project requirements, get instant cost estimates, and resolve technical queries, or reach out directly by email:

Send Direct Email

The AI Agent is in final deployment stage on the server. For immediate inquiries and project quotes, please email me at info@leandrus.net

Technical Profiles & Code

GitHub LinkedIn