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Who Is Marcelo B. Diani? Senior Full Stack Developer & Team Lead

Senior Full Stack & DevOps | Team Lead | Founder | E-commerce & AI Specialist. Graduated in Computer Engineering at the University of São Paulo (USP), in São Carlos, Brazil (2019). Mathematics Olympiad medalist. Have been working for 7+ years mostly with JavaScript/TypeScript with strong experience in web development. E-commerce specialist on maximizing online sales. AI enthusiast. Always with a positive mindset.

What Skills and Technologies Does Marcelo Diani Use?

Marcelo Diani is proficient in a wide range of modern technologies spanning frontend, backend, databases, DevOps, cloud infrastructure, and AI/ML.

Technical Skills Overview
FrontendBackendDatabaseDevOps & CloudAI & Machine Learning
React, Next.js, TypeScript, Angular, Tailwind CSS, Three.jsNode.js, Express, GraphQL, REST, Python, .NETPostgreSQL, MongoDB, DynamoDB, RedisAWS, Docker, GitHub Actions, Terraform, CDKLLMs, LangChain, RAG, OpenAI, Gemini

What Is Marcelo Diani's Professional Experience?

  1. Clearer.io — Team Lead / Senior Full Stack Developer / Scrum Master (2022 – 2025). Led two teams of 7 developers. Managed 14+ Shopify apps with millions in annual revenue. Migrated from Heroku to AWS using CDK. Implemented observability with Datadog.
  2. Acesso Comercial — Founder (2021 – 2022). Founded an e-commerce startup similar to Shopify with ERP, CRM, and AI features. Created 600+ online stores. 1,000+ tests.
  3. Vórtx DTVM — Full Stack Developer (2020 – 2021). Financial company. Digitized 1,800 records from Excel to automated platform. Generated 200,000 dynamic PDFs.
  4. Ênfase Instituto Jurídico — Full Stack Developer Intern (2019 – 2020). Education company. Built postgraduate platform from scratch for 13,000+ students. Used Kafka for event-driven architecture.

How Can You Hire Marcelo Diani as a Freelance Developer?

I'm always open to new opportunities and interesting conversations.. Contact Marcelo via WhatsApp, email (marcelodianib@gmail.com), LinkedIn, or GitHub. He offers full stack development, technical consulting, team leadership, and e-commerce optimization services. Available for remote work worldwide across all time zones.

Frequently Asked Questions

What technologies does Marcelo Diani specialize in?
I specialize in React, Node.js, TypeScript, Next.js, and AWS. I also have strong experience with MongoDB, PostgreSQL, Docker, GraphQL, and AI/ML technologies including LLMs, LangChain, and RAG. My full tech stack spans frontend, backend, databases, DevOps, and cloud infrastructure.
How can I hire Marcelo Diani as a freelance developer?
You can reach me via WhatsApp, email, or LinkedIn. I offer full stack development, technical consulting, team leadership, and e-commerce optimization services. Fill out the quote request form above or send me a message directly — I typically respond within 24 hours.
What is Marcelo Diani's educational background?
I hold a Computer Engineering degree from the University of São Paulo (USP), São Carlos campus, graduating in the top 10 of 61 students in 2019. I'm also a gold medalist at the OBMEP national mathematics olympiad and hold a CPA-20 financial certification with a 93% score.
What kind of projects does Marcelo Diani build?
I build web applications, e-commerce platforms, SaaS products, mobile apps, and AI-powered solutions. Notable projects include leading 14+ Shopify apps generating millions in annual revenue, founding an e-commerce startup with 600+ stores, and building open-source tools like BoolTools SEO Crawler.
Where is Marcelo Diani located and does he work remotely?
I'm based in São Paulo, Brazil, and available for remote work across all time zones. I have extensive experience working with international teams, including 3 years leading remote teams for a Boston-based company. I speak Portuguese (native), English (advanced), German, Spanish, and Italian.
How many years of experience does Marcelo Diani have?
I have 7+ years of professional experience in software development, with 3+ years in leadership roles. I've managed teams of up to 7 developers, written over 1,000 tests, and managed 25+ production applications across various industries including e-commerce, fintech, and education.
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Hello, I'm

Marcelo B. Diani

Senior Full Stack & DevOps | Team Lead | Founder | E-commerce & AI Specialist

Top 4% Cursor user in 2025

“My mission is to improve people's lives through technology.”

About Me

Graduated in Computer Engineering at the University of São Paulo (USP), in São Carlos, Brazil (2019). Mathematics Olympiad medalist. Have been working for 7+ years mostly with JavaScript/TypeScript with strong experience in web development. E-commerce specialist on maximizing online sales. AI enthusiast. Always with a positive mindset.

Languages

0+
Years of Experience
0+
Years of Leadership
0+
Tests Written
0+
Apps Managed
Live GitHub StatsREST API / fetch / React

Experience

2022 – 2025
Boston, Massachusetts, Remote

Clearer.io logoClearer.io

Team Lead / Senior Full Stack Developer / Scrum Master

  • ›Led two teams as Team Lead (7 developers). Responsible for PR reviews, 1:1 meetings, external meetings, individual goal tracking, Scrum ceremonies, sprint planning and task breakdown in Jira.
  • ›Helped manage more than 14 apps to Shopify App Store with tens of thousands of users monthly and total revenue of millions per year.
  • ›Created a library with CDK and moved apps from Heroku to AWS to reduce hosting costs and improve architecture management through IaC.
  • ›Added unit tests and end-to-end tests using Datadog, allowing faster feature delivery without regressions. Added Codacy for static code analysis.
  • ›Added observability with logging and tracing in Datadog, reducing debugging time. Implemented caching with Memcached. Created Lambda functions using DynamoDB and LLMs.
JavaScriptTypeScriptNode.jsReactNext.jsMongoDBPostgreSQLRESTRedisReact NativeAWSCDKDataDogHerokuCodacyCloudflare
2021 – 2022
São Carlos, São Paulo

Acesso Comercial logoAcesso Comercial

Founder

  • ›Founder and developer of a startup to help small stores sell online similar to Shopify with ERP, CRM, blog (with SSR) and omnichannel chat.
  • ›Built with 3 microservices (auth, core, metrics) in Linux server. Used Github Actions for Blue-Green deployment with Docker and Nginx.
  • ›Used React, Node.js, GraphQL, Relay, MongoDB, AWS (S3). Created features using AI with OpenAI, Gemini and Typesense for RAG.
  • ›Led two developers and coordinated with designers, social media, lawyers, and consultants.
  • ›Setup more than 1,000 unit, integration and end-to-end tests. Created around 600 stores.
TypeScriptNode.jsReactNext.jsMongoDBGraphQLAWSGitHub ActionsDockerWebSocketLLMsRAGSSRBullMQRedis
2020 – 2021
São Paulo, São Paulo

Vórtx DTVM logoVórtx DTVM

Full Stack Developer

  • ›Worked at a financial company collecting and maintaining client data for fund investments.
  • ›Used Angular and Node for 3 microservices and 2 lambdas, and .NET Core connected with MongoDB cluster.
  • ›Moved 1,800 records from manual Excel sheets to an online automated platform, eliminating paper-based workflow.
  • ›Delivered the project to external users in 6 months, saving at least one full-time employee of manual effort.
  • ›Implemented refresh token, pagination optimization (reducing time to 500ms), and generated 200,000 dynamic PDFs.
C#.NETJavaScriptAngularSQL ServerMongoDBRESTGitHub ActionsLambdaPuppeteerRedux
2019 – 2020
São Carlos, São Paulo

Ênfase Instituto Jurídico logoÊnfase Instituto Jurídico

Full Stack Developer Intern

  • ›Worked at a distance education company using JavaScript frameworks, React and Node with PostgreSQL across 3 main products.
  • ›Developed a postgraduate platform from scratch and one for law job positions, both with about 13,000 active students.
  • ›Architected front end with Atomic Design for componentization, resulting in easier maintenance.
  • ›Built platform connected with an event system using Kafka for user statistics.
  • ›Organized company events for promoting integration among members from different teams.
JavaScriptNode.jsReactPostgreSQLGraphQLRelayKafkaPrismaStyled Components

Skills & Technologies

Interact with the sphere to explore my tech stack

Frontend

ReactNext.jsTypeScriptAngularReact NativeCSS3HTML5RelayReduxStyled ComponentsStorybook

Backend

Node.jsGraphQL.NETC#PythonRESTExpressPrismaKafkaBullMQWebSocket

Database

MongoDBPostgreSQLSQL ServerRedisDynamoDBTypesense

DevOps & Cloud

AWSDockerCDKLambdaCI/CDGitHub ActionsCloudflareHerokuVercelDataDogGrafanaPrometheusOpenTelemetry

AI & Machine Learning

LLMsLangChainRAGTensorFlowCursor

Other

GitCypressPuppeteerSEOFigmaUnity

Interactive Lab

Explore interactive simulations across engineering and computer science

Interactive Lab

Security Awareness

See what your browser reveals — and how this site protects you

Your Digital Fingerprint

This is what any website can learn about you from a single visit

Scanning your browser...

This data is collected client-side for demonstration only and is NOT stored or transmitted.

Side Projects

WithWillow.ai

2026

Contributions to the secure MCP gateway connecting AI agents to enterprise systems.

TypeScriptMCPSecurityEnterprise

BoolTools SEO Crawler

2026

Open-source SEO/GEO auditing tool for optimizing search engine and AI search visibility.

AstroGolangSEOGEOOpen Source

Welcome to Brazil

2026

Complete guide for foreigners to visit, live, and thrive in Brazil.

TypeScriptNext.jsReactVercel

marcelodiani

2025

My portfolio website (marcelodiani.online).

TypeScriptNext.jsReactThree.jsVercel

vc-chess

2025

Real-time multiplayer chess game — no account required.

TypeScriptNext.jsReactWebSocketReal-time

vc-billings

2025

Personal monthly payment tracker (Next.js + Drizzle + Neon Postgres).

TypeScriptNext.jsDrizzleNeonPostgreSQL

vc-ecommerce

2025

E-commerce storefront template.

TypeScriptNext.jsReactE-commerce

vc-plumbing-quote-landing

2025

Service quote landing page.

TypeScriptNext.jsReactLanding Page

vc-product-landing-page

2025

Product launch landing page (Next.js + Framer Motion).

TypeScriptNext.jsReactFramer Motion

Language Translator

2025

React Native + Python translator using LangGraph and OCR.

PythonFastAPITypeScriptReact NativeLangGraphOCRLLMs

Learn Code

2025

Online interface to learn languages and frameworks through concepts and puzzles.

TypeScriptReactNext.jsVercel

Coding Classes

2025

Recorded coding classes teaching AI-assisted development techniques.

JavaScriptNode.jsReactCursorSupabase

Banner Generator

2025

Banner generation tool leveraging multiple LLMs for quality output.

TypeScriptNode.jsLLMs

Crypto Tax Calculator

2022

Cryptocurrency calculator (JavaScript).

Node.jsJavaScriptTests

Platform Jump Game

2021

Unity C# mobile game with obstacles and global ranking on Google Play.

C#UnityFirebaseGoogle Play

PicBird

2021

Mobile game built with Unity and C#.

UnityC#MobileGame

Education & Achievements

USP Logo

Computer Engineering

University of São Paulo (USP)

2015 – 2019

Final grade: 7.8 — Top 10 of 61 students. Completed with no failed courses.

📊

CPA-20 Certification

2020

Score 93% — Ranked 1st among all candidates at the company.

🏅

Mathematics Olympiad — OBMEP

2009 – 2012

Gold medal winner. Participated in the 4-year program at UNESP for medalists.

💻

Hackathon Elo+Getnet

2018

Developed a solution to facilitate consumer purchases in a weekend hackathon.

🤖

Warthog Robotics — USP

2015 – 2016

Control Department of USP São Carlos robotic team for robot soccer championships.

📚

Pontinha Project

2019

Taught English to students in a public school once a week for 6 months.

🧥

USP Winter Clothing Drive

2019

Collected about 60,000 pieces of clothing for institutions in São Carlos region.

🎄

Operation Christmas

2018 – 2019

Gathered food and distributed Christmas presents for children in need.

Blog

Latest insights on software development and engineering

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Describe Your Project

Let's Connect

I'm always open to new opportunities and interesting conversations.

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Frequently Asked Questions

Common questions about my services, experience, and how we can work together

I specialize in React, Node.js, TypeScript, Next.js, and AWS. I also have strong experience with MongoDB, PostgreSQL, Docker, GraphQL, and AI/ML technologies including LLMs, LangChain, and RAG. My full tech stack spans frontend, backend, databases, DevOps, and cloud infrastructure.

You can reach me via WhatsApp, email, or LinkedIn. I offer full stack development, technical consulting, team leadership, and e-commerce optimization services. Fill out the quote request form above or send me a message directly — I typically respond within 24 hours.

I hold a Computer Engineering degree from the University of São Paulo (USP), São Carlos campus, graduating in the top 10 of 61 students in 2019. I'm also a gold medalist at the OBMEP national mathematics olympiad and hold a CPA-20 financial certification with a 93% score.

I build web applications, e-commerce platforms, SaaS products, mobile apps, and AI-powered solutions. Notable projects include leading 14+ Shopify apps generating millions in annual revenue, founding an e-commerce startup with 600+ stores, and building open-source tools like BoolTools SEO Crawler.

I'm based in São Paulo, Brazil, and available for remote work across all time zones. I have extensive experience working with international teams, including 3 years leading remote teams for a Boston-based company. I speak Portuguese (native), English (advanced), German, Spanish, and Italian.

I have 7+ years of professional experience in software development, with 3+ years in leadership roles. I've managed teams of up to 7 developers, written over 1,000 tests, and managed 25+ production applications across various industries including e-commerce, fintech, and education.

Curious About the Code?

This entire portfolio is open source. Explore how it was built — from 3D scenes and real-time data widgets to the AI assistant and game engine.

Next.js 16 & React 19Three.js 3D ScenesAI Chat AssistantBilingual (EN/PT)Real-Time Data APIsCanvas Games & Demos
View Source on GitHub
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