João Fernandes

Fullstack Developer | AI & Data Analyst
Leiria, PT.

About

Highly driven Fullstack Developer with 2+ years of experience specializing in AI-driven applications, including RAG and LLM integrations, alongside robust web, mobile (iOS/macOS/WatchOS), and desktop development. Leverages expertise in Python, JavaScript, React, Next.js, and data analysis to build high-performance, secure, and user-centric solutions. Passionate about leveraging technology to solve complex problems and eager to contribute innovative solutions in dynamic environments like New York City.

Work

OfficeGest - Software de Gestão
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Software Developer

Leiria, Leiria, Portugal

Summary

Contributes to the development and maintenance of scalable web applications, leveraging modern frameworks and backend solutions to enhance product functionality and user experience.

Highlights

Contributed to the development and maintenance of scalable web applications, utilizing modern frameworks like Next.js and React.js to ensure high performance and responsiveness.

Implemented robust backend solutions with Python, Node.js, and Laravel, integrating databases such as MySQL and PostgreSQL to support critical business operations.

Collaborated with cross-functional teams to define technical requirements and deliver features, enhancing product functionality and user experience.

Applied best practices in code quality, security, and deployment using Docker, contributing to a stable and efficient development lifecycle.

Freelance
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Fullstack Developer

Leiria, Leiria, Portugal

Summary

Led end-to-end development of diverse web and native applications for multiple clients, delivering custom solutions and integrating complex APIs.

Highlights

Developed multiple e-commerce web platforms, integrating external APIs and a dropshipping solution to enhance sales channels and operational efficiency.

Engineered a comprehensive task, machine, and worker management software for the molds industry, integrating with invoicing software APIs to streamline operations.

Built an automotive parts sales application with a robust API and database, enabling rapid import and consolidated display of thousands of parts from international scrap yards.

Created custom WordPress plugins and enhanced existing web infrastructures to meet specific client requirements for functionality and performance.

SINMETRO
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Data Analysis Intern

Leiria, Leiria, Portugal

Summary

Analyzed data and developed various dashboards to enhance operational control and quality management within an industrial setting.

Highlights

Created diverse Grafana dashboards for energy and quality control, enabling real-time performance monitoring and data-driven decision-making.

Developed front-end snippets using HTML, JavaScript, and CSS to support web application functionality and user interface enhancements.

Managed, cleaned, and maintained MS SQL databases, ensuring data integrity and optimizing performance for critical business operations.

Education

Politécnico de Leiria
Leiria, Leiria, Portugal

Superior Technology Course (CST)

Data Analysis and Market Studies

Grade: 15

Courses

Explored various data analysis and statistical libraries in Python, including Pandas, Matplotlib, SciPy, and NumPy for advanced data manipulation and visualization.

Gained in-depth knowledge of statistical methods, data protection regulations, and best practices for database development and usage (MS Access).

Developed expertise in questionnaire design, survey structuring, and advanced sampling techniques for market research.

Completed a capstone project on 'Stock Market Analysis,' studying the development and correlation of 4 indices (PSI20, CAC40, DAX30, NASDAQ) and Bitcoin, including outlier detection and explanation.

Languages

Portuguese

Native

English

Native

German

Conversational

Skills

Artificial Intelligence

AI, RAG (Retrieval-Augmented Generation), MCP Tools, LLM Integrations, TensorFlow.

Programming Languages

Python, Go, JavaScript, TypeScript, PHP.

Frontend Development

React.js, Next.js, HTML, CSS, Tailwind CSS, Shadcn, Mantine, Tamagui, Vite.

Backend Development

Node.js, Laravel, API REST.

Databases

MySQL, PostgreSQL, MSSQL, Supabase, Microsoft Access, SQL.

Mobile & Desktop Development

iOS, MacOS, WatchOS, React Native, Expo.

DevOps & Tools

Docker, Linux, Ubuntu, Git, WordPress, Monday.

Data Analysis

Pandas, Matplotlib, SciPy, NumPy, Grafana, Dashboards, Microsoft Excel, SPSS, Exploratory Data Analysis, Google Forms, Statistical Methods, Analytical Capacity.

Project Management

Research, Strategy.