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ERL.

Eric Russel M. LopezFull-Stack Software Developer

Since 2020, I've been developing software across web, mobile, and desktop. Most of my projects focus on business operations, recruitment, logistics, and tools that people rely on beyond the first release.

Project areas

  • Real Estate
  • Logistics
  • Healthcare
  • Finance

Focus Areas

  • System Architecture
  • Relational Database Design
  • API Development
  • Deployment & Hosting

Rusbyte Studio

Founder of Rusbyte — independent studio developing client software from database design to deployment.

About

What I do and how I got here.

Most of my work revolves around web applications, database systems, and business platforms that continue to evolve after launch. Under the Rusbyte brand, projects involve writing server-side logic, structuring database schemas, and building user interfaces for logistics, real estate, and internal operations.

The focus is on system architecture and code maintainability. Most recently, this involved structuring the database tables and access control rules for Oakford Realty, an Australian real estate company. Relational structures and API endpoints are built to match actual business operations rather than technical convenience.

Beyond web platforms, projects include microcontroller-based automation and hardware integration, including a fire-detection robot that received campus recognition. Also served as Web Assistant Lead for Google Developer Groups on Campus, coordinating technical workshops on React, Node.js, and Firebase.

Maintainable Architecture

01

Codebases should be structured so the next developer (or myself in six months) can pick them up and make changes without breaking existing features.

Server-Side Boundaries

02

Access control and data validation are enforced at the database and API layers, not just on the client. If a user shouldn't see it, the server doesn't send it.

Operational Efficiency

03

Software needs to load quickly and work reliably. This means profiling SQL queries, keeping payload sizes small, and keeping the interface accessible.

Experience

Work history.

Professional roles and initiatives focused on database integrity, api architectures, and client platforms.

Founder & Full-Stack Developer

Work

Rusbyte — Independent Software Development Studio

Present

Independent software studio focused on custom business platforms, mobile tools, and backend architecture. The work involves writing normalized database schemas, building user interfaces, securing API endpoints, and configuring deployments that continue to evolve after release.

  • Translating client business requirements into working software layouts and database schemas.
  • Writing REST APIs, implementing user authentication, and setting up role-based access control.
  • Building reporting dashboards to monitor operations and help clients track their daily workflows.
  • Managing deployment pipelines, server configurations, and hosting environments.

Full-Stack Developer

Work

Oakford Realty

Real estate company operating in Australia · Feb 2026 – Mar 2026

Developed features for an Australian real estate platform to manage listings, client history, and daily agency operations.

  • Created the relational database schemas for tracking properties and agent assignments.
  • Developed backend API routes and client-facing dashboards for listings administration.
  • Set up user authentication and role-based permissions to protect client documents.
  • Consolidated properties and active transaction logs into unified dashboard views.
  • Optimized query runtimes and refactored core components to improve load times.

Web Development Assistant Lead

Leadership

Google Developer Groups on Campus

Academic Year 2024–2025

Co-led campus workshops on web development basics, assisting students with learning fundamental concepts and building simple applications.

  • Mentored students on React, Node.js, and Firebase during lab hours and live coding reviews.
  • Supported campus tech event coordination and developer bootcamps.
  • Prepared curriculum notes and conducted step-by-step coding demonstrations.
  • Received a Certificate of Completion from GDG on Campus.
Technical Validation

Certifications and technical credentials.

Certifications in databases, web technologies, and document management.

  • Certification

    Information Technology Specialist (ITS) — Databases

    Certiport / Pearson VUE

    Covers relational database design, SQL query writing, and administration. Applied to normalizing schemas and structuring data in client projects.

    June 2026
  • Certificate

    Web Development Assistant Lead — Certificate of Completion

    Google Developer Groups on Campus

    Awarded for coordinating web development workshops, delivering tutorials on JavaScript and React, and leading code reviews for students.

    AY 2024–2025
  • Associate

    Microsoft Office Specialist (MOS) — Word 2019 Associate

    Microsoft / Certiport

    Covers document layout and structure. Useful for technical specifications, API documentation, and database schema diagrams.

    May 2024
Skills

The stack I build with.

What I use day-to-day to design, build, and ship software.

Frontend

01

Responsive, accessible interfaces that work well across devices and are easy to maintain.

  • React
  • Next.js
  • TypeScript
  • JavaScript
  • Tailwind CSS
  • HTML5
  • CSS3
  • Responsive Design

Mobile App Dev

02

Cross-platform and native mobile apps — performant rendering, offline support, and device integration.

  • Flutter
  • React Native
  • Kotlin

Desktop Applications

03

Desktop apps and GUIs with event-driven architecture and native system integration.

  • Python
  • PyQt
  • PySide
  • Tkinter
  • Java
  • JavaFX
  • Swing

Backend

04

APIs, auth systems, business logic, and backend services for real-world workflows.

  • Node.js
  • Java
  • Python
  • REST APIs
  • Authentication
  • Role-Based Access Control
  • PHP
  • Server Actions

Databases

05

Schema design, query optimization, and data integrity — built to last.

  • SQL
  • MySQL
  • Firebase
  • Database Design
  • Query Optimization

Cloud & Deployment

06

Deployments, environment management, and keeping production stable.

  • Vercel
  • Railway
  • Git
  • GitHub
  • CI/CD
  • Environment Management

Tools

07

The tools and workflows I rely on every day.

  • VS Code
  • Git
  • npm
  • Claude
  • ChatGPT
  • Copilot
  • Gemini

Practices

08

The practices I follow to keep code clean and projects on track.

  • Clean Architecture
  • SEO
  • Performance Optimization
  • Code Review
Solutions

Systems developed for operational workflows.

Featured web applications and backend systems developed around operational business requirements.

Embedded Systems & IoT

Software meets hardware.

Microcontroller projects, sensor integrations, and hardware builds for safety and monitoring.

Outstanding Investigatory Project

Fire Rescue Robot

An autonomous robot that navigates hazardous zones and locates fires. I wired the circuits, designed the power routing, and wrote the microcontroller code to read flame and ultrasonic sensors in real-time.

  • Microcontroller programming and event-driven sensor polling loops
  • Integration of flame sensors and ultrasonic transducers for navigation
  • Control logic for autonomous heat source localization and safety systems
  • Custom circuit design, hardware prototyping, and power supply routing
  • Embedded Systems
  • Sensors
  • Automation
  • Robotics

Food Spoilage Detector

An IoT monitoring station that detects food spoilage early by tracking storage conditions. Built with an Arduino Uno, MQ-4 gas sensor, and atmospheric sensors — triggers LCD alerts when readings go out of range.

  • Arduino hardware integration with MQ-4 gas telemetry and DHT sensors
  • Low-latency polling of atmospheric methane levels and ambient temperature
  • Local alert logic using physical indicators and LCD status displays
  • Applying embedded engineering to automate storage condition audits
  • Arduino Uno
  • MQ-4 Gas Sensor
  • IoT
  • Atmospheric Monitoring
Independent Studio

Founder & Full-Stack Developer

Rusbyte — Independent Software Development Studio

Rusbyte was established to handle software projects directly with clients, managing the process from database schema to deployment. The studio develops web applications, mobile tools, and backend systems, with a focus on database integrity and maintainable codebases.

Software Discipline

Every project is built for real use: structured architecture, documented schema definitions, and secure access configurations.

Full-Stack Delivery

Developing from the database layer up to the user interface, ensuring backend APIs and client interfaces are correctly aligned.

Iterative Development

Releasing software incrementally, testing with operational data, and refining based on usage feedback.

Read the Rusbyte case studyVisit Studio Site
Contact

Inquiries & Collaborations.

Open to full-time roles, freelance projects, and collaborations. Drop a message or reach out below.

Email

ericrussellopez@gmail.com

GitHub

See the code