You will get HTML, JS & PHP Bug Fixing, CSS & Responsive & Layout Fix
Project details
I will use all my knowledge acquired throughout my career to resolve the matter in context in the most professional way possible, always maintaining good communication with the client and clarifying and documenting each action carried out
Programming Languages
PHP, HTML & CSS, JavaScriptCoding Expertise
Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$5
|
Standard
$15
|
Advanced
$30
|
|---|---|---|---|
| Delivery Time | 1 day | 1 day | 3 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
About Roberto Antonio
Full Stack Developer | SaaS, APIs, AI Integrations & Automation
Maia, Portugal - 12:14 am local time
I'm Roberto Machado, a Software Developer based in Portugal with 5+ years of professional experience designing, developing, and maintaining software solutions for e-commerce, logistics, IoT, and SaaS businesses.
I specialize in building custom software, SaaS platforms, internal business systems, AI-powered solutions, and complex integrations. I don't only write code — I take projects from idea to production: defining architecture, designing databases, developing backend and frontend systems, integrating external services, deploying applications, and continuously improving them.
Currently, I work as a software developer for a major e-commerce company in Portugal, while also being the sole developer responsible for the technology of a delivery company in Porto. In this role, I make technical decisions, design new features, optimize existing systems, and build solutions that improve daily business operations.
Some of the problems I help companies solve:
• Automating repetitive business processes to reduce operational costs
• Building SaaS platforms from concept to production
• Developing internal management systems and dashboards
• Integrating third-party platforms and APIs
• Creating AI-powered tools and chatbots
• Improving performance and scalability of existing applications
• Modernizing legacy systems and improving workflows
Recent projects and results:
• Developed an AI chatbot for a delivery company that reduced customer support requests by more than 70% by automating repetitive interactions.
• Built and maintain business-critical systems for a logistics company, including workflow improvements and billing process optimization.
• Designed and developed a complete multi-tenant SaaS platform for restaurants from scratch. The platform includes restaurant management, digital menus, online ordering, Stripe payments, delivery platform integrations, optimized image handling, subdomain-based stores, and administration dashboards.
• Worked on an IoT platform for a Chilean startup that processes continuous streams of measurement data, requiring optimized rendering, real-time visualization, charts, and aggregated analytics.
My technical experience includes:
Backend:
PHP, Laravel, CodeIgniter, Node.js, NestJS, REST APIs, SQL
Frontend:
JavaScript, TypeScript, Vue.js, modern web interfaces and dashboards
Databases:
PostgreSQL, MySQL, database architecture, data modeling and optimization
Infrastructure:
Docker, Git, deployment workflows and application maintenance
Integrations:
Stripe, Google Maps, Uber APIs, Onfleet, OpenAI/ChatGPT integrations, webhooks and third-party services
AI Development:
AI chatbots, LLM integrations, business automation workflows, and practical AI solutions focused on improving operations.
I work with startups, small businesses, and companies that need a reliable technical partner to build, improve, or automate their software.
If you need someone who can understand your business challenges, make technical decisions, and deliver a complete solution — from architecture to production — I would be happy to discuss your project.
Steps for completing your project
After purchasing the project, send requirements so Roberto Antonio can start the project.
Delivery time starts when Roberto Antonio receives requirements from you.
Roberto Antonio works on your project following the steps below.
Revisions may occur after the delivery date.
The first step is to explore your site to identify and diagnose the issue.