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Fullstack Developer · Web & Mobile Apps

Who I Am

I'm a fullstack developer from Fresno, California, building web and mobile apps. I focus on clear, modern interfaces and reliable backends—React Native, Node, Firebase, and more.

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Latest Project

Pro Cleaning App

Pro Cleaning

React Native Expo Firebase
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Available for Work

Open to freelance and full-time opportunities.

Hire Me

What I Do

  • Web design
  • Web development
  • Mobile apps

Technologies & Clients

React Firebase Node JavaScript TypeScript React Native Expo Firebase Node JavaScript TypeScript

What Clients Say

  • Roberto

    Roberto

    Ruben was hired to create a ordering ecosystem featuring dual interfaces for customers and kitchen staff. Customers enjoy a seamless experience with real-time order tracking and menu browsing, while the dedicated Cook Dashboard empowers staff to manage availability, toggle order acceptance, and track statuses from "Pending" to "Completed" in real-time.

Daniel lewis
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Daniel lewis

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Resume

Education

  1. Clovis Community College

    2021 — 2025

    This fall, I will complete my final course, Engineering Electric Circuits, to earn my Associate of Science in Software Engineering.

    This course studies elements of discrete mathematics which have applications to computer science. Topics include sets, propositional and predicate logic, relations and functions, proof techniques, graph, trees, and discrete probability.

    • Transfer Credits: (A, CSU, UC, CAL-GETC)
    • C-ID: COMP 152
    • Key Topics: Sets, propositional and predicate logic, relations and functions, proof techniques, graphs, trees, discrete probability

    This course introduces object-oriented design concepts, recursion, manual and automatic memory management; implementation of data structures including linked lists, stacks, queues, binary search trees, heaps, and hash tables; insertion, searching, and deletion. C++ language is used.

    • Key Topics: Object-oriented design, recursion, memory management, data structures (linked lists, stacks, queues, binary search trees, heaps, hash tables), C++ programming

    This course introduces problem solving, algorithm development, procedural and data abstraction using C++ language; program design, coding, debugging, testing, and documentation.

    • Transfer Credits: (A, CSU, UC)
    • C-ID: COMP 112, COMP 122
    • Key Topics: Problem solving, algorithm development, procedural and data abstraction, C++ programming, program design, debugging, testing, documentation

    Solutions to first order ordinary differential equations, including separable, linear, homogeneous of degree zero, Bernoulli and exact with applications and numerical methods. Solutions to higher order differential equations using undetermined coefficients, variation of parameters, and power series, with applications. Solutions to linear and non-linear systems of differential equations, including numerical solutions. Matrix algebra, solutions of linear systems of equations, and determinants. Vector spaces, linear independence, basis and dimension, subspace and inner product space, including the Gram-Schmidt procedure. Linear transformations, kernel and range, eigenvalues, eigenvectors, diagonalization and symmetric matrices.

    • Transfer Credits: (A, CSU, UC, CAL-GETC)
    • C-ID: MATH 240, MATH 260, MATH 910S
    • Key Topics: Differential equations (first order, higher order, systems), Matrix algebra, Vector spaces, Linear transformations, Eigenvalues and eigenvectors, Diagonalization

    Course description to be added.

    • Key Topics: Advanced calculus topics

    Course description to be added.

    • Key Topics: Calculus fundamentals

    Course description to be added.

    • Key Topics: Introduction to calculus

    Classical mechanics, properties of matter, gravitation, fluid mechanics, oscillatory motion and mechanical waves. This course is calculus-based.

    • Transfer Credits: (A, CSU, UC, CAL-GETC)
    • C-ID: PHYS 205, PHYS 200S (PHYS 4A + PHYS 4B + PHYS 4C)
    • Key Topics: Classical mechanics, properties of matter, gravitation, fluid mechanics, oscillatory motion, mechanical waves, calculus-based physics

    The topics covered in this course include: Mechanical waves, Thermodynamics, electricity, magnetism.

    • Transfer Credits: (A, CSU, UC, CAL-GETC)
    • C-ID: PHYS 210, PHYS 200S (PHYS 4A + PHYS 4B + PHYS 4C)
    • Key Topics: Mechanical waves, thermodynamics, electricity, magnetism

  2. Center for Advanced Research and Technology

    2019 — 2021

    During my time at the Center for Advanced Research and Technology, I developed a strong foundation in both cybersecurity and game design. In my first year, I focused on cybersecurity, completing projects to secure smart home systems and earning my CompTIA Security+ certification. The following year, I transitioned to 3D video game design, where I collaborated in teams of four, taking on roles such as artist, programmer, UI designer, and animator. My team successfully designed and developed a single-player racing game set in a compact representation of San Francisco and a 2D platformer game inspired by classic titles like Mario, demonstrating effective task distribution and cohesive game development.

My skills

  • Web design
    70%
  • Graphic design
    70%
  • C++
    90%
  • JavaScript
    40%
  • React Native
    75%
  • Firebase
    70%
  • Node.js
    65%

Days I Code

  • Your GitHub chart

Portfolio

  • Pro Cleaning App

    Pro Cleaning

    Application

    A comprehensive mobile app for professional cleaning services featuring job scheduling, customer management, service tracking, and payment processing. Built to streamline operations for cleaning businesses and enhance customer experience.

    React Native Expo Firebase

    Outcome: Successfully deployed and helping cleaning professionals manage their business operations efficiently with improved scheduling and customer communication.

    Buy Now: $2,000 Premium with Customizations: $2,250 - $2,750 Similar Project? Get a Quote
  • Rizo Pizzeria

    Rizo Pizzeria

    Application

    A production-ready mobile app for Rizo Pizzeria featuring online ordering, real-time order tracking, menu browsing, and seamless payment integration. Built to enhance customer experience and streamline restaurant operations.

    React Native Expo Firebase

    Outcome: Successfully deployed and in active use—increased online orders by 40% and improved customer satisfaction with streamlined ordering and real-time tracking.

    Buy Now: $500 Premium with Customizations: $750 - $1,000 Similar Project? Get a Quote
  • Shelton Springs HOA App

    Shelton Springs Home Owners Association App

    Application

    A production-ready mobile app for HOA community management with real-time notifications, document sharing, and resident communication.

    React Native Expo Firebase

    Outcome: Successfully deployed and in active use by Shelton Springs HOA—streamlined operations and improved resident engagement.

    Buy Now: $1,500 Premium with Customizations: $2,000 - $2,500 Similar Project? Get a Quote
  • Gadget Garage App

    Gadget Garage

    Application

    A comprehensive mobile app for managing and tracking your tech gadgets, warranties, and maintenance schedules. Built with modern mobile technologies.

    React Native Firebase Node.js

    Outcome: Live production app helping users organize their tech inventory efficiently.

    Buy Now: $500 Premium with Customizations: $750 - $1,000 Similar Project? Get a Quote
  • Rosa's Beauty Salon

    Rosa's Beauty Salon

    Application

    A modern booking and management system for beauty salons. Features appointment scheduling, client management, and service tracking.

    Web App JavaScript
    Similar Project? Get a Quote
  • Zoom Realty

    Zoom Realty

    Web development

    A modern real estate website with property listings, search functionality, and agent profiles. Responsive design optimized for all devices.

    HTML CSS JavaScript
    Buy Now: $500 Premium with Customizations: $750 - $2,500 Similar Project? Get a Quote
  • Real Estate

    Estate

    Web development

    A clean and modern real estate platform showcasing properties with advanced filtering and search capabilities.

    HTML CSS JavaScript
    Similar Project? Get a Quote
  • Homeverse

    Homeverse

    Web development

    An elegant real estate website featuring property showcases, virtual tours, and seamless user experience.

    HTML CSS JavaScript
    Similar Project? Get a Quote

Blog

Copy-Paste Snippets

Handy code snippets you can copy

React Native Expo Start 
npx create-expo-app my-app
        cd my-app
        npx expo start
Blog post image

Design

Design conferences in 2022

This is where the full blog post content will be displayed. You can add detailed content here including multiple paragraphs, images, and other rich content.

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Services
& Pricing

Transparent pricing for all development services. All projects include consultation, planning, and professional delivery. Get a custom quote tailored to your specific needs.

Services & Pricing

  • Web & Mobile App Development

    Custom projects built to your specifications. Includes Firebase integration, responsive design, real-time notifications, and deployment setup.

    $1,000 - $5,000 Fixed Price
    Get a Quote

  • Code Licensing

    Reusable app templates with full source code. Includes 12 months support, customization assistance, documentation, and commercial use license. Examples: Shelton Springs HOA App.

    $1,000+ One-time License

    12 months support included, then $200/year maintenance

    Get a Quote

  • PC Services (Gadget Garage)

    Hardware builds, repairs, and upgrades. Includes Gadget Garage app setup, system optimization, warranty tracking, and maintenance scheduling.

    $100 - $300 Per Service
    Get a Quote

Note: All prices are starting points. Final quotes depend on project scope, complexity, and specific requirements. Contact me for a detailed estimate tailored to your needs.

Hire Me

Looking for a skilled developer to bring your project to life? I specialize in creating modern, responsive web applications and mobile apps that deliver exceptional user experiences.

Whether you need a complete website, a mobile app, or custom development solutions, I'm here to help turn your vision into reality.

What I Offer

  • Web development icon

    Web Development

    Custom websites and web applications built with modern technologies. Responsive design, fast performance, and SEO optimization.

  • mobile app icon

    Mobile App Development

    Cross-platform mobile applications using React Native and Expo. iOS and Android apps with native performance.

  • design icon

    Full-Stack Solutions

    Complete solutions from frontend to backend. Database design, API development, and cloud integration with Firebase.

My Expertise

  • React Native
    75%
  • JavaScript
    40%
  • Firebase
    70%
  • Node.js
    65%
  • Web Design
    70%
  • C++
    90%

Let's Work Together

Fill out the form below to discuss your project. I'll get back to you within 24 hours to discuss your requirements and provide a quote.

Contact

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