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eCommerce Frontend Development Node.js Python WordPress
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Marcio A.

@marcioazambujo

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5.0
3

3.6

3.6

100%

Ecommerce | Web Scraping | AI | Mobile App

$15 USD / Hour

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Brazil (6:42 PM)

Joined on July 27, 2022

$15 USD / Hour

I’m a Software Engineer with 11+ years of experience building scalable, production-grade applications end-to-end. I combine modern front-end development (TypeScript, React, Next.js) with robust back-end systems in Python (FastAPI/Django) and C#/.NET (ASP.NET Core), delivering clean architecture, well-documented APIs, and reliable deployments. I specialize in bringing AI into real products not demos. I build and integrate LLM features such as RAG (retrieval-augmented generation), agents and tool-calling workflows, vector search, and AI chatbots, with a strong focus on security, accuracy, evaluation, monitoring, and cost/latency optimization. I’m also comfortable across data and infrastructure: PostgreSQL/SQL Server, MongoDB, Redis, Docker, CI/CD, and cloud deployments on AWS/Azure. If you need someone who can design, build, and ship software with strong engineering fundamentals and practical AI communicating clearly and delivering on time, I can help.

Verifications

On time

100%

On budget

100%

Accept rate

60%

Portfolio

Portfolio

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5.0 · 3 Reviews
Reviews
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Frontend Style Refactor (React + Supabase) £60 GBP

He completed the project very quickly. I am going to work with him for a long time

Deep S.

@Deep02323

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Saskatoon, Canada

2 days ago

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Local OCR-Based PDF Statement Reader (Bank + Tax PDFs → JSON) for Node.js/Next.js + MySQL ₹45,000 INR

Great work. Delivered on time.

Amitkumar Dineshbhai P.

@amitkumarpraj

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Motamiya Mangrol, India

1 month ago

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Complete & Finalize WordPress eCommerce Website -- 2 (archived) $60 USD

Excellent developer to work with. Very knowledgeable, patient, and detail-oriented. They quickly understood the problem, explained everything clearly, and delivered exactly what was needed. Communication was smooth and professional throughout the project. Highly recommended and I would definitely work with them again.

Former Client (inactive)

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Experience

Senior Full Stack Software Engineer | .NET - Gen AI - Vue - Python - Azure

Oct, 2023 - Present

2 years, 5 months

Steamtec

Oct, 2023 - Present

2 years, 5 months

I optimized critical insurance systems for high availability using .NET Core, Python, and Redis, implementing distributed caching and monitoring with Azure Insights and Hangfire. Led the migration to a microservices architecture with Clean Architecture and CI/CD DevOps. Integrated Generative AI, LLMs, and Prompt Engineering practices. Applied robust security (OWASP, SSL/TLS, JWT, OAuth 2.0) and quality control with SonarQube, managing Linux and Windows servers with Selenium and Cypress tests.

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Florianopolis, Brazil

Oct, 2023 - Present

2 years, 5 months

Senior Full Stack Software Engineer | .NET - Node - Angular - React - AWS

Sep, 2022 - Aug, 2023

11 months, 1 day

Logstore

Sep, 2022 - Aug, 2023

11 months, 1 day

Leading a team of 4, I improved delivery and bug resolution through delegation and pair programming. I refactored legacy modules and implemented CI/CD with AWS and Docker, reducing deployment time. I introduced Kubernetes and enhanced observability.

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São Paulo, Brazil

Sep, 2022 - Aug, 2023

11 months, 1 day

Mid Full Stack Software Engineer | .NET - Vue - Mongo - Microservices - Azure

Dec, 2021 - Aug, 2022

8 months

Pmweb

Dec, 2021 - Aug, 2022

8 months

I led the migration from ASP.NET MVC to .NET Core APIs with no downtime, using performance profiling and automated testing. I adopted microservices and Event-Driven patterns to improve scalability and performance. I used Redis, Kafka/RabbitMQ, Elasticsearch, and MongoDB, along with Prometheus and Grafana for monitoring, resolving critical bugs, and ensuring continuous operation.

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Porto Alegre, Brazil

Dec, 2021 - Aug, 2022

8 months

Education

Universidade Cruzeiro do Sul

2018 - 2024

6 years

Computer Science

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Brazil

2018 - 2024

6 years

Qualifications

React Native

2021

Udemy

Expertise in developing cross-platform mobile applications using React Native and JavaScript.

2021

JavaScript Advanced Developer

2020

Codecademy

Expert in JavaScript programming, including ES6 features, asynchronous programming, and advanced algorithms.

2020

Data Science with Python Certification

2025

DataCamp

Expertise in data analysis and visualization using Python, focusing on libraries like NumPy, Pandas, and Matplotlib.

2025

Publications

Advanced State Management with React and Redux

2020

University of Cruzeiro do Sul - Department of Computer Science

This advanced article is aimed at students who already have a foundation in React. It details how to use Redux for effective state management in large-scale applications, with practical examples and tips for optimizing performance in complex systems.

2020

Building a Secure Web Application with .NET Core

2021

University of Cruzeiro do Sul - Department of Computer Science

This article explores the use of .NET Core for building secure web applications. It covers best practices for securing data, implementing authentication, and securing APIs in modern applications, serving as an internal resource for courses within the university.

2021

Introduction to Machine Learning with Python

2021

University of Cruzeiro do Sul - Department of Computer Science

This article covers the fundamental concepts of Machine Learning, with a special focus on how to use Python to build and train models. The publication is aimed at computer science students, providing an accessible introduction to machine learning techniques.

2021

Certifications

P

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