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Guillermo Montaraz Soriano

@guillermomontarazsor

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Backend engineer at Triple Cherry who built Kotlin game logic and reusable frameworks for web games.

Spain

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At Triple Cherry, I implemented Kotlin business logic and game mechanics, and developed more than 30 web games across the backend and frontend. I also built real-time client-server communication with WebSockets.

I designed a reusable framework for new game mechanics and a configurable button-panel system reused across the framework's machines. As Front-End Team Lead, I led four developers, reviewed code, and contributed to architecture improvements in an Agile/Scrum environment.

Previously, at Capgemini, I optimized SQL queries, modeled data, and developed ETL pipelines with Spark and Scala deployed on AWS and Azure. I now work on personal Angular web applications and video game projects.

Experience

Work history, roles, and key accomplishments

Current

Independent Software Development

Current

Personal Projects

Sep 2024 - Present (2 years 1 month)

Developed personal web applications with Angular and video game projects. Engaged in continuous learning, including an Angular course on Udemy.

Angular Web Development Game Development

Full Stack Developer, Front-End Team Lead

Triple Cherry

Apr 2022 - Sep 2024 (2 years 5 months)

Implemented backend business logic in Kotlin and developed over 30 web applications for online casino platforms. Diagnosed and fixed critical bugs in the company's base framework affecting over 40 projects, and designed a reusable framework for game mechanics. Promoted to Front-End Team Lead, leading 4 developers and conducting code reviews in an Agile/Scrum environment.

Kotlin JavaScript CreateJS NodeJS AWS SQL HTML CSS Bootstrap WebSockets Agile Scrum Code Review Team Leadership

Data Engineer / Big Data

Capgemini

Sep 2021 - Apr 2022 (7 months)

Optimized SQL queries and modeled data for a banking project with OpenBank. Developed ETL processes and pipelines with Apache Spark (Scala) for large data volumes, deployed on AWS and Azure.

SQL ETL Apache Spark Scala AWS Azure Data Modeling Data Pipelines

Neural Network Programmer

INIT, Universitat Jaume I

Feb 2021 - May 2021 (3 months)

Developed a GAN for facial aging and CNN/LSTM models for human behavior prediction using Python and TensorFlow. Prepared and cleaned data, evaluated models, and tuned hyperparameters.

Python TensorFlow Gan CNN LSTM Data Preparation Model Evaluation Hyperparameter Tuning

Education

Degrees, certifications, and relevant coursework

Udemy

Angular: De cero a experto, Angular

2025 - 2025

Completed the Angular: De cero a experto course.

Microsoft

Microsoft Azure Fundamentals (AZ-900), Cloud Fundamentals

2021 - 2021

Earned the Microsoft Azure Fundamentals (AZ-900) certification.

Universitat Jaume I

Grado en Diseño y Desarrollo de Videojuegos, Video Game Design and Development

2017 - 2021

Grade: 7.82/10

Activities and societies: Final project with Matrícula de Honor; coursework included Programming, Algorithms, Databases, Software Engineering, Operating Systems, Networks, AI, and Computer Graphics.

Completed a degree in Video Game Design and Development with a final project grade of 10/10 and an average grade of 7.82/10.