I design and build scalable, data-driven digital systems with a strong focus on clean architectures, structured problem-solving, and measurable business impact.

My background combines software engineering, analytics, and digital transformation projects in large enterprise environments.
I enjoy translating complex requirements into reliable systems that support informed decision-making.

Digital Systems & Architecture

• Scalable backend design
• Structured data models and APIs
• Event-based and data-driven system design

Data & Analytics

• KPI frameworks & funnel logic
• Data modeling and forecasting
• Decision-support dashboards

Engineering

• Java • Spring Boot
• Angular • TypeScript
• REST APIs

Platforms & Tooling

• PostgreSQL • Supabase
• Cloudflare Workers
• Grafana (decision-support dashboards)
• Git & CI/CD

Full-stack application for managing horses, owners, and multi-generation pedigrees.

Focus

• Modeling complex real-world relationships
• Structured domain logic and clean architecture
• REST-based backend with a modern frontend

Tech

• Java, Spring Boot, Angular, TypeScript, H2
  → Validation layer, layered architecture, family-tree visualization

🔗 Repository:
https://github.com/mrgreata/horse-owner-management-app

End-to-end ticketing platform developed in a multi-person software engineering project (TU Wien).
Includes fully dynamic seatmap generation, pricing logic, validation, and a complete booking workflow.

Focus

• Complex seatmap rendering (stage, runway, symmetric layouts)
• Backend–Frontend integration
• Automated data generation
• Full booking flow: selection → validation → checkout

Tech

• Java, Spring Boot, PostgreSQL
• Angular, TypeScript
• Cypress E2E Testing, JUnit, MockMvc

→ Built core Seatmap Module, including generator, data model, and editor UI.

🔗 Repository:
https://github.com/mrgreata/ticketing-seatmap-app

Digital marketplace platform for structured listing, browsing, and management of high-value assets.

Focus

• Scalable data ingestion and persistence
• Clear user flows and platform logic
• Relational data modeling

Tech

• Next.js, TypeScript, PostgreSQL

Personal portfolio enhanced with a fully self-hosted analytics system.

Focus

• Privacy-friendly event tracking
• Serverless data ingestion
• Dashboard-based insight generation

Tech

• Cloudflare Workers
• Supabase (PostgreSQL)
• Grafana
• JavaScript

🔗 Live site:
https://mrgreata.github.io/developer-portfolio
🔗 Repository:
https://github.com/mrgreata/developer-portfolio

Applied time-series models to predict demand and behavioral patterns.

Focus

• Translating data into forecasts and insights
• Model evaluation and accuracy comparison

Methods

• ARIMA
• Holt-Winters

• Designing scalable backend systems
• Applying data analytics to real business problems
• Improving system reliability and maintainability
• Exploring digital transformation use cases at scale

• Portfolio: https://mrgreata.github.io/developer-portfolio
• LinkedIn: https://linkedin.com/in/marlon-greta
• Email: marlongreta1@gmail.com

I’m always open to discussions around digital systems, data-driven decision-making, and technology-enabled transformation.
Feel free to reach out.