Markov Chain Attribution for Marketing Channels
Discover how Markov Chain models go beyond last-click attribution to measure true marketing impact.
Backend Engineer (Java, Spring Boot) | Data & Analytics Systems
I build backend systems and data platforms that transform raw business data into actionable insights (ERP, KPIs, APIs, dashboards).
My Skills
Backend
Java, Spring Boot, REST APIs, MySQL
Data
SQL (MSSQL, BigQuery), Python (pandas), Tableau
Tools
Docker, AWS, Git, CI/CD
Featured Systems:
Production-Ready Blogging Platform (Spring Boot, AWS, Docker)
A Java Spring Boot blog with secure login, role-based access, and rich text editing, hosted on AWS EC2 via Docker.
Full-stack CRM system built with Spring Boot, React, and Docker
Full-stack CRM application using Spring Boot, React, MySQL, and Docker Compose.
Data Cleaning & KPI Engineering
Transforming raw eCommerce data into reliable business KPIs using SQL and BigQuery.
Featured Posts:
Part 3: User Registration & Default Role
Learn how to implement secure user registration with default role in Spring Boot. Full code walkthrough for production-r...
![Part 2: Why I Chose char[] for Passwords — And What I Learned](/_astro/P0nVCOqI.DZ_RjyqK_Z7DLIi.jpg "Part 2: Why I Chose char[] for Passwords — And What I Learned")
Part 2: Why I Chose char[] for Passwords — And What I Learned
I used char[] for passwords in my Spring app. Here’s why it’s not a magic bullet — and what actually matters for securit...
Part 1: Spring Security Setup in Spring Boot MVC with Thymeleaf
Learn how to set up Spring Security in a Spring Boot MVC app using Thymeleaf. SecurityFilterChain, form login, CSRF prot...
Experience
• Built ERP reporting systems and KPI dashboards using SQL and PHP
• Migrated legacy systems to SAP B1 and HANA
• Designed data models and business process workflows
• Developed backend systems with Java, Spring Boot, and REST APIs
Last Posts:
Chapter 4.2 Clustering in Action: Product & Customer from TheLook
How K-Means, DBSCAN & Hierarchical clustering reveal hidden patterns in customer behavior and product performance. Full analysis w...
Chapter 4.1: How Demographics Influence Customer Behavior
The analysis demonstrates a robust statistical methodology using z-tests and GLM modeling to evaluate cancellation rates across de...
Part 3: User Registration & Default Role
Learn how to implement secure user registration with default role in Spring Boot. Full code walkthrough for production-ready apps.
Part 2: Why I Chose char[] for Passwords — And What I Learned
I used char[] for passwords in my Spring app. Here’s why it’s not a magic bullet — and what actually matters for security.
Part 1: Spring Security Setup in Spring Boot MVC with Thymeleaf
Learn how to set up Spring Security in a Spring Boot MVC app using Thymeleaf. SecurityFilterChain, form login, CSRF protection, an...
Chapter 3.5: Measuring Inventory & Supply Chain Efficiency
Discover how to calculate key supply chain metrics like Inventory Turnover, Fill Rate, and Service Level using SQL. Turn data into...
Building Marketing KPIs from Raw Event Data Using SQL
Learn how to engineer core marketing KPIs using SQL from raw event data in BigQuery.
Chapter 3.3: Calculating Customer Experience KPIs
Analyze key metrics like delivery time, return rate, and OTIF to assess customer satisfaction and logistics performance.
Chapter 3.2: Sales & Profitability — Beyond Revenue
Learn how to calculate total sales and gross profit from eCommerce data using SQL.
Chapter 3.1: Data Cleaning & Prep for Reliable Insights
How I cleaned and prepared the TheLook dataset—handling missing values, duplicates, and ensuring data integrity for accurate KPIs.
Secure Docker Secrets on AWS: Real-World Guide
Secure Spring Boot + MySQL on AWS using Docker Secrets. No hardcoded passwords. Real-world config for secure, production-ready dep...
Mastering MySQL Backups & Restores in Docker: A Real-World Guide
When you're running a Spring Boot app with Docker, your data is everything. Here’s how I handle MySQL backups and restores — the r...
Chapter 2: Exploring the theLook eCommerce Database
A data analyst's hands-on exploration of the theLook eCommerce dataset in BigQuery, revealing how to understand an unfamiliar data...
The AI Accountability Gap: When Hype Outpaces Reality
Despite bold claims of revolution, AI is failing to deliver real economic value—replacing accountability more than jobs.