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David Simões

@davidsimes

Full Stack Engineer at D&L designing a modular JavaScript AI assistant with voice integration, remote access, and extensible integrations.

Brazil

Message

What I'm looking for

I’m open to global and remote opportunities, where I can build secure, scalable systems and contribute to clean architecture and meaningful products.

At D&L, I designed and implemented a modular AI assistant architecture using Node.js, with voice integration, remote access, and extensible integrations. I documented the project’s architecture and approach.

As a Frontend Developer at D&L, I led development of a responsive Admin Control Panel that improved operational efficiency by 30%. I also created a reusable component library that reduced feature delivery time by 20%.

I contributed to a secure authentication system using OAuth2 and JWT, and built reusable interfaces with React, Redux, and Material-UI. My work has included integrating RESTful APIs and improving application security.

I’m interested in clean architecture and building secure, scalable systems that align with business goals. My background includes React and Node.js engineering, along with a degree in Information Technology.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

D&L

Apr 2026 - Present (7 months)

Designed and implemented a modular AI assistant architecture using Node.js, with voice integration, remote access and extensible integrations.

Documentation:
https://documentcrustai.netlify.app/

Current

Frontend Developer

Current

D&L

Mar 2020 - Present (6 years 8 months)

💼 Frontend Developer
Tech Stack: React.js | Redux | Material-UI | Node.js | Express.js | OAuth2 | JWT

🔹 Responsibilities:

Built dynamic, reusable, and scalable UI components using React.js and Redux.

Collaborated with designers to deliver intuitive, user-friendly interfaces.

Integrated RESTful APIs to ensure smooth data communication between frontend and backend.

Participated in code reviews,

Current

Senior Frontend Developer

Current

Novéo Travaux

Jan 2020 - Present (6 years 10 months)

• Desenvolveu e manteve APIs RESTful com FastAPI (Python) e microserviços escaláveis, com padrões de Clean Code e DDD, integrando serviços de IA e processamento de dados.

• Implementou mensageria assíncrona com AWS SQS para comunicação entre microserviços, garantindo desacoplamento e resiliência em ambientes distribuídos.

• Orquestrou ambientes com Docker e Kubernetes, mantendo pipelines de CI/C

Current

Senior Software Engineer

Current

Novéo Travaux

Jan 2020 - Present (6 years 10 months)

• Applied Domain-Driven Design tactical patterns (entities, value objects, aggregates, repositories, domain events, domain services) to model core business domains in Node.js/TypeScript services, keeping business rules isolated from infrastructure concerns.