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NellyCN/README.md

Hi👋 I'm Nelly Cumpa

Backend & Full Stack Developer | Java · Spring Boot · React · SQL | Data & Business Solutions

Developer with a background in Banking and Finance, focused on building web applications, backend services, and data-driven business solutions.

I combine software development, data analysis and business knowledge to design practical technological solutions, with experience in Java, Spring Boot, React, JavaScript, SQL and Python.

My projects cover backend development, microservices, web applications, data analysis and Business Intelligence, with a focus on solving real business needs through technology.


👩‍💻 About Me

  • Background in Banking and Finance, transitioning into software development.
  • Experience with Java, Spring Boot, REST APIs, SQL, MongoDB.
  • Building applications with React and JavaScript.
  • Data analysis using Python (Pandas, Matplotlib, Seaborn).
  • Knowledge of business processes, data modeling, and BI tools.
  • Interested in opportunities involving Backend, Full Stack, Automation, Data, and Business Intelligence.

🚀 Featured Projects

"Each project reflects my focus on connecting backend systems, data analysis, and business processes to deliver practical solutions."

MadeByJane — E-commerce & Business Management

Web application for the managing and selling handmade products, combining e-commerce functionality with business-oriented features.

Technologies: React · Vite · Tailwind CSS · JavaScript · REST APIs · LocalStorage

Focus: E-commerce · Sales · Products · Business Processes · UX

Repository · Live Demo


Banking Microservices

Backend solution based on a microservices architecture for banking operations, developed using reactive programming and REST APIs.

Technologies: Java · Spring Boot · Spring WebFlux · MongoDB · REST APIs · Postman

Focus: Backend Development · Microservices · APIs · Banking Domain · Software Architecture

Repository-transactions Repository-customers


TelecomX LATAM — Data Analysis

Data analysis project focused on understanding customer behavior and identifying factors associated with customer churn.

Technologies: Python · Pandas · Matplotlib · Seaborn · numpy · Jupyter Notebook · Google Colab

Focus: Data Cleaning · Exploratory Data Analysis · Data Visualization · Customer Churn · Business Insights

Repository


Business Intelligence Sales Platform

Business Intelligence solution designed to organize and analyze sales, costs, products and business performance through structured data and KPIs.

Technologies: Excel

Focus: Data Modeling · ETL · Sales Analysis · KPIs · Business Intelligence · Process Automation

Repository


Alura Store — Data Analysis

Data analysis project focused on evaluating sales performance, product behavior and business indicators to support business decision-making.

Technologies: Python · Pandas · Matplotlib · Seaborn · numpy · Google Colab

Focus: Data Analysis · Data Visualization · Sales Performance · Business Insights

Repository


🛠️ Technical Skills

Core Skills

  • Backend & APIs: Java · Spring Boot · REST APIs · Microservices
  • Databases: SQL Server · MySQL · Oracle · MongoDB
  • Data Analysis: Python · Pandas · Matplotlib · Seaborn
  • Business Intelligence: Excel · Power BI · ETL basics

Complementary Skills

  • Frontend: React · Next.js · Vite · Tailwind CSS · HTML · CSS
  • Other Tools: Git · GitHub · Postman · Jira · Trello · Notion · Figma
  • Extra: Node.js · Jupyter Notebook · Google Colab · UniVerse-SQL

🎯 Professional Focus

I focus on backend development and data-driven solutions, applying my knowledge and personal projects to connect technology, data, and business processes.

My goal is to continue growing as a developer, building solutions that integrate backend systems, data analysis, and business intelligence to solve real business problems.


📫 Let's Connect

LinkedIn · GitHub


Building software, working with data, solving business problems.

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  1. madebyjane-store madebyjane-store Public

    🧶 E-commerce Full-Stack para productos artesanales. React 18, Tailwind CSS & Node.js. Un caso de estudio de desarrollo ágil: de la idea al MVP en producción.

    JavaScript 1

  2. UPSK-AI-APPS-001-chat-with-your-files UPSK-AI-APPS-001-chat-with-your-files Public

    Forked from Laboratoria/UPSK-AI-APPS-001-chat-with-your-files

    JavaScript 1

  3. alura-store alura-store Public

    Proyecto de análisis de ventas de tiendas para Alura Latam con Python y visualización de datos.

    Jupyter Notebook 2

  4. TelecomX_LATAM TelecomX_LATAM Public

    Análisis de evasión de clientes (Churn) en Telecom X utilizando Python, Pandas y visualización de datos para identificar patrones y factores asociados a la cancelación de servicios.

    Jupyter Notebook 1

  5. PFinal-BankSystem_ms-customers PFinal-BankSystem_ms-customers Public

    🛡️ Microservicio de Gestión de Clientes construido con Spring Boot 3.3.6. Incluye arquitectura de capas, documentación interactiva con Swagger y +90% de cobertura de código con JaCoCo. 🚀

    Java 1

  6. P3-BankSystem_ms-transaction P3-BankSystem_ms-transaction Public

    Java