Open to opportunities

João Silva

@joosilva4

Message

Senior full-stack software developer specializing in web, mobile, and AI solutions.

Brazil

Message

What I'm looking for

I seek roles building production web, mobile, and AI products where I can lead architecture, implement ML-driven features, and work in collaborative, product-focused teams emphasizing reliability and growth.

I am a senior full-stack software developer with deep experience building web, mobile, and AI-driven products, including chatbots and search systems powered by RASA, Mistral AI, and OpenAI. I have led development of production platforms, rebuilt and upgraded legacy systems, and delivered cross-platform apps using React, Nest.js, Flutter, and modern backend stacks.

My work emphasizes practical, efficient solutions that produce lasting impact: I updated the Proplexa.ai site with AI features, built Itsyou AI Search Bot and its web and mobile apps, and led crypto exchange platform development at Optlynx. I combine engineering rigor with AI/ML tooling (PyTorch, TensorFlow, Hugging Face, OCR) and DevOps practices to ship reliable products.

Experience

Work history, roles, and key accomplishments

Current

AI Developer

Current

ProplexaAI

Jan 2026 - Present (2 months)

Implemented AI features and chatbot functionality for the Proplexa.ai website, improving user interactions with conversational AI components.

Rasa Mistral AI OpenAI API JavaScript React RESTful APIs NLP Chatbot

Current

Web & Mobile Developer

Current

ProplexaAI

Sep 2025 - Present (6 months)

Developed web and mobile features for Proplexa.ai, integrating AI-driven components and maintaining responsive web and mobile experiences.

React Flutter JavaScript RESTful APIs Mobile Development CI CD Git

AI Developer

ItsyouAI

Jul 2025 - Jan 2026 (6 months)

Built the Itsyou AI Search Bot using RASA and Mistral (7B) models to generate human-like responses to customer queries, improving support automation.

Rasa Mistral AI OpenAI API React Flutter NLP

Web & Mobile Developer

ItsyouAI

Jan 2025 - Jul 2025 (6 months)

Developed the Itsyou.ai website and Admin Desktop app plus Android/iOS mobile apps using React.js, Nest.js and Flutter to deliver cross-platform solutions.

React Nest Flutter JavaScript TypeScript Mobile Apps CI CD

Senior Developer

Optlynx

Jul 2023 - Nov 2024 (1 year 4 months)

Led development of Optlynx's crypto exchange service platforms (BOS, COINSWIPE, XEXON), implementing card payment integrations and transaction workflows.

PHP Payment Integration MySQL Security APIs Microservices DevOps