IT Software Specialist

Hello! I'm João Silva, an experienced IT software professional based in São Paulo, Brazil, with over 10 years of experience in delivering high-quality, scalable, and secure software solutions to clients across the globe. I specialize in full-cycle software development, from initial concept and system design to deployment and long-term support. Whether you’re a startup looking to build your MVP or an enterprise in need of digital transformation, I offer tailored solutions that align with your goals, timeline, and budget.

🔧 Technical Expertise

My skills span across front-end, back-end, and DevOps, allowing me to take ownership of entire projects or seamlessly integrate with your existing team. Here's an overview of my key competencies:

🖥️ Front-End Development:

• HTML5, CSS3, JavaScript (ES6+)

• React.js, Vue.js, Angular

• TypeScript

• Responsive Design & Cross-Browser Compatibility

• Tailwind CSS, Bootstrap, Material UI

• Performance Optimization & Accessibility

⚙️ Back-End Development:

• Node.js, Express.js

• Python (Django, Flask)

• Java (Spring Boot)

• PHP (Laravel)

• Ruby on Rails

• RESTful APIs, GraphQL

🗃️ Database & Storage:

• PostgreSQL, MySQL, SQLite

• MongoDB, Firebase

• Redis, Elasticsearch

• Cloud-based storage (AWS S3, Azure Blob, Google Cloud Storage)

☁️ Cloud & DevOps:

• AWS (EC2, Lambda, RDS, S3, CloudFront)

• Google Cloud Platform

• Docker, Kubernetes

• Jenkins, GitHub Actions, GitLab CI/CD

• NGINX, Apache

• Infrastructure as Code (Terraform)

🧠 Other Tools & Skills:

• Agile & Scrum methodologies

• Jira, Trello, Asana

• Git, Bitbucket, GitLab

• API integration (Stripe, Twilio, OAuth, etc.)

• Unit & Integration Testing (Jest, Mocha, PyTest)

🌍 Languages

• Portuguese (Native)

• English (Fluent – professional proficiency)

• Spanish (Intermediate – conversational)

Clear communication is a key pillar of my freelance work. I’ve worked with clients in North America, Europe, and Asia and I’m fully comfortable in conducting meetings, demos, and support in both English and Portuguese.

👨‍💻 Career Summary

Over the past decade, I’ve worked in diverse roles ranging from software developer to technical lead, including full-time employment, remote work, and freelancing. My projects have ranged from e-commerce platforms and SaaS applications to internal enterprise systems, AI-based tools, and mobile apps. Below are a few highlights:

🔹 Freelance Software Engineer (2018–Present)

Clients from US, Canada, UK, Germany, and Brazil

• Designed and developed over 40 custom web and mobile applications using React, Node.js, and Python.

• Built scalable back-end systems using cloud infrastructure (AWS and GCP) serving thousands of concurrent users.

• Integrated third-party services like payment gateways (Stripe, PayPal), social logins, analytics tools, and CRMs.

• Delivered MVPs for over 15 startups, helping them secure funding and grow user bases.

• Collaborated remotely with distributed teams using Git, Slack, Zoom, and Agile tools.

🔹 Senior Software Engineer – FinTech Startup (2015–2018)

São Paulo, Brazil

• Led the development of a payment reconciliation platform using Java and Angular.

• Implemented secure authentication systems, audit logs, and encryption at rest/in transit.

• Reduced cloud costs by 30% through refactoring and migrating infrastructure to serverless architecture.

• Mentored junior developers and led code reviews, ensuring clean, maintainable code.

🔹 Software Developer – IT Services Company (2012–2015)

São Paulo, Brazil

• Delivered custom CRM, ERP, and HRM systems for local enterprises.

• Developed modules for accounting, customer support, and data visualization.

• Worked closely with business analysts to convert client requirements into functional modules.

📈 What I Offer

As a freelancer, I’m committed to delivering more than just code. I offer complete solutions that work for your users, your business, and your future roadmap.

✅ End-to-End Development
✅ Scalable Architecture Design
✅ UI/UX Best Practices
✅ Code Quality & Documentation
✅ Transparent Communication
✅ On-Time Delivery
✅ Post-Launch Support

I take a problem-solving approach to every project. Whether it’s choosing the right tech stack, improving performance, or implementing a new feature, I always aim for practical, sustainable solutions.

💼 Selected Projects

Here are a few real-world projects I’ve worked on recently:

1. SaaS Platform for Remote Team Management

• Stack: React, Node.js, MongoDB, AWS

• Features: Role-based permissions, time tracking, video meetings, analytics dashboard

• Impact: Helped reduce operational overhead by 25% for client companies.

2. E-commerce Storefront & Admin Panel

• Stack: Vue.js, Laravel, MySQL, Stripe API

• Features: Product catalog, order management, payment integration, customer chat

• Impact: Successfully launched within 6 weeks, with full SEO optimization.

3. AI-Based Resume Parser

• Stack: Python, Flask, OpenAI API, PostgreSQL

• Features: Upload CVs, extract structured data, match job descriptions

• Impact: Improved HR screening speed by 40% for a recruiting agency.

🌐 Location & Availability

📍 Based in São Paulo, Brazil (GMT-3)
🕒 Available for full-time, part-time, or hourly contracts
🖥️ Flexible to your time zone – I regularly work with teams in the US and Europe
💬 Open to short-term or long-term engagements

🌟 Client Testimonials

"João has been absolutely critical to the success of our platform launch. He not only delivered high-quality code but also helped us think strategically about scalability and user experience."
— Alex M., Startup Founder (USA)

"A brilliant full-stack developer who truly understands business logic and communicates clearly. We’ll definitely hire João again."
— Carla T., Product Manager (Germany)

📣 Let’s Connect!