Cleyton Silva

Senior Software Engineer

Senior Software Engineer with 16+ years of experience building scalable, high-performance web applications and distributed systems across e-commerce, telecommunications, automotive, and startup environments.
Specialized in full-stack development with React, Next.js, Node.js, and TypeScript, with strong expertise in AWS cloud-native architecture, system design, and API-driven applications. Experienced in designing and delivering production-grade software with a focus on scalability, performance, reliability, and maintainability.
Proven experience leading cross-functional engineering teams and delivering end-to-end solutions from architecture and design to production deployment. Strong background in optimizing system performance, improving CI/CD pipelines, and enabling faster, safer software delivery in agile environments.
Recently focused on AI-powered applications and conversational systems, building production-ready platforms for web and WhatsApp using LLMs (OpenAI, DeepSeek). Hands-on experience with prompt engineering, context management, and optimizing AI systems for performance, cost efficiency, and scalability.
Currently a Senior Software Engineer at Loblaw Digital, contributing to core platform initiatives and modernizing frontend architecture with Next.js in a large-scale e-commerce ecosystem.

Main skills

Frontend: ReactJS, NextJS, JavaScript, TypeScript, Jest, Storybook

Backend: NodeJS (ExpressJS, Fastify, NestJS)

Databases: PostgreSQL, MongoDB, SQL Server, Redis

Cloud: AWS (ECS, EC2, S3, Amplify, RDS, SQS, SES, CloudFront), Cloudflare, Vercel, Railway, Upstash

Version Control: Git (GitHub, GitLab, Bitbucket)

Project Management: Jira, Trello

Professional Experience

Loblaw Companies Limited - Senior Software Engineer (May 2025 - Present)

Working as a Senior Software Engineer on the Core team at Loblaw, responsible for maintaining and evolving several e-commerce platforms across the Loblaw group.

EOS Loan - Senior Software Engineer (December 2022 - May 2025)

As a Senior Software Engineer, I lead a team of talented developers, ensuring high performance, speed, and quality in all deliverables.

DevSkin - IT Consulting - Senior Full Stack Engineer (December 2021 - November 2023)

As a Full-Stack JavaScript Developer, I worked extensively with Node.js (Express) and React, delivering scalable and high-performing web applications.

Innovation Intelligence AI - Senior Full Stack Engineer (December 2020 - December 2021)

As a Senior Full-Stack Engineer, I focused primarily on backend development with Node.js (Express), while also contributing to frontend development using React.

Oi - Senior Software Developer (February 2017 - November 2020)

As a Senior Software Developer, I contributed to the development of a B2B software platform designed to streamline sales and business operations.

HSTC - Senior Software Developer (March 2016 - March 2020)

As a Software Developer, I worked on diverse applications, with a primary focus on JavaScript, ReactJS, and Node.js.

Stefanini - Software Developer (March 2014 - March 2016)

As a contracted Software Developer at FIAT's automotive manufacturing plant, I specialized in process automation systems for vehicle production.

Oi/Telemar - Software Developer (August 2011 - March 2014)

As a Software Developer, I worked with a legacy PHP structure and utilized EXTJS for the application interface.

Newcom IT S/A - PHP Developer (October 2010 - August 2011)

As a contracted Software Developer for Oi Telecommunications, I contributed to multiple software solutions supporting the operations team.