Jefferson M.

Jefferson M.

Brazil
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About Me

Senior Full Stack Engineer with 12+ years of experience building and scaling high-performance platforms end-to-end. Strong frontend expertise with SvelteKit, React, Next.js, and TypeScript, combined with solid backend experience in Node.js and PHP (Laravel) for API-driven and headless architectures. Proven track record working in early-stage and high-growth environments, owning features from concept to production, designing scalable systems, and integrating complex data pipelines. Experienced in building Al-powered and automation-driven platforms, including data ingestion, vendor matching systems, and document validation workflows. Strong focus on performance, scalability, and clean system design.

AI, ML & LLM

Tailwind

Frontend

Svelte React Next.js JavaScript

Backend

PHP Node.js Laravel REST APIs

Database

PostgreSQL MySQL MongoDB SQLite

DevOps

Docker AWS CloudFlare

QA & Testing

Cypress Vitest Mocha

Workflow

Git Github GitHub Actions

Other

Linux Nginx Playwright Typescript Vite NestJS Microservices Graphql

Work history

Avenue Code (USA - Remote)
Senior Software Engineer
2021 - 2026 (5 years)
Remote

  • Owned full lifecycle development of platform features, from ideation to deployment, ensuring scalability and maintainability.

  • Designed and implemented data-driven systems, including integrations with external APIs and data sources for real-time insights and analytics.

  • Built frontend applications using SvelteKit, React, and Next.js, leveraging Vite for optimized builds and performance.

SvelteKit React Next.jsViteNode.jsLaravel DockerNginxCI/CD Pipelines GitHub Actions Playwright CypressClaude Cursor
MJV (Brazil / USA Clients)
Senior Software Engineer
2019 - 2021 (2 years)
Remote

  • Designed and delivered scalable web platforms with SvelteKit, React, and API-first backend architectures.

  • Built and maintained backend services using Node.js and Laravel, focusing on clean API design.

  • Developed data integration layers connecting third-party services and financial systems.

SvelteKit React Node.jsLaravel MySQLPostgreSQLCypressVitest
Cely
Senior Software Engineer
2018 - 2019 (1 year)
Remote

  • Built scalable platforms using Svelte and React with API-driven backend services.

  • Integrated GraphQL and REST APIs for efficient data consumption.

  • Structured frontend architecture with Vite and component-driven design (Storybook and Tailwind).

SvelteReact API GraphqlREST APIs ViteStorybookTailwindMySQLPostgreSQL
Unimed Natal
Senior Software Engineer
2013 - 2018 (5 years)
Remote

  • Developed healthcare systems with frontend-heavy architecture and backend integrations.

  • Built document management and compliance tracking systems with validation workflows.

  • Designed dashboards and real-time data systems.

Balaio Ideias Digitais
Software Engineer
2012 - 2013 (1 year)
Remote

  • Developed web platforms and booking systems focused on UX and performance

  • Built reusable frontend components and optimized interfaces

  • Worked with relational databases ensuring data integrity and performance

M3 Media Digital
Software Engineer
2011 - 2012 (1 year)
Remote

  • Developed responsive websites and CMS platforms

  • Focused on performance optimization and scalable frontend architecture

  • Worked with relational databases ensuring data integrity and performance

Education

Education
Bachelor in Information Systems
Estácio
2018