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Hi, I'm Guillermo Contreras Goya, a passionate data analyst and automation engineer based in Valencia, Spain. I specialize in using AI and machine learning technologies to optimize processes and improve operational efficiency. With a background in marine science and a current MSc in Data Science, I enjoy tackling complex problems through data-driven solutions and automation. I have experience designing machine learning models, developing AI chatbots, and managing cross-functional projects. I'm enthusiastic about innovation and collaboration, always aiming to create scalable and ethical AI solutions that bring measurable benefits to businesses and stakeholders.…Hi, I'm Guillermo Contreras Goya, a passionate data analyst and automation engineer based in Valencia, Spain. I specialize in using AI and machine learning technologies to optimize processes and improve operational efficiency. With a background in marine science and a current MSc in Data Science, I enjoy tackling complex problems through data-driven solutions and automation. I have experience designing machine learning models, developing AI chatbots, and managing cross-functional projects. I'm enthusiastic about innovation and collaboration, always aiming to create scalable and ethical AI solutions that bring measurable benefits to businesses and stakeholders.

Guillermo Contreras Goya

AI Engineer, Copywriter, Data Scientist, +5

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Hi, I'm Guillermo Contreras Goya, a passionate data analyst and automation engineer based in Valencia, Spain. I specialize in using AI and machine learning technologies to optimize processes and improve operational efficiency. With a background in marine science and a current MSc in Data Science, I enjoy tackling complex problems through data-driven solutions and automation. I have experience designing machine learning models, developing AI chatbots, and managing cross-functional projects. I'm enthusiastic about innovation and collaboration, always aiming to create scalable and ethical AI solutions that bring measurable benefits to businesses and stakeholders.…Hi, I'm Guillermo Contreras Goya, a passionate data analyst and automation engineer based in Valencia, Spain. I specialize in using AI and machine learning technologies to optimize processes and improve operational efficiency. With a background in marine science and a current MSc in Data Science, I enjoy tackling complex problems through data-driven solutions and automation. I have experience designing machine learning models, developing AI chatbots, and managing cross-functional projects. I'm enthusiastic about innovation and collaboration, always aiming to create scalable and ethical AI solutions that bring measurable benefits to businesses and stakeholders.

Available to hire

Hi, I’m Guillermo Contreras Goya, a passionate data analyst and automation engineer based in Valencia, Spain. I specialize in using AI and machine learning technologies to optimize processes and improve operational efficiency. With a background in marine science and a current MSc in Data Science, I enjoy tackling complex problems through data-driven solutions and automation.

I have experience designing machine learning models, developing AI chatbots, and managing cross-functional projects. I’m enthusiastic about innovation and collaboration, always aiming to create scalable and ethical AI solutions that bring measurable benefits to businesses and stakeholders.

Skills

Experience Level

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Fluent

Catalan; Valencian

Fluent

French

Intermediate

Work Experience

Data Analyst / Automation Engineer at Valencia Mar

July 1, 2023 - Present

Designed and optimized ML models in Python and R to predict yacht sailing routes, improving routing efficiency and operational planning. Built an AI chatbot using TensorFlow and PyTorch to automate web inquiries, cutting response time by 30% and boosting customer satisfaction by 25%. Developed SQL-based pipelines for data mining and cleansing; applied statistical methods to enhance chatbot NLP accuracy and ensure ethical data handling. Conducted trend analysis and predictive modelling for yachting behaviour based on historical and live data. Collaborated with developers and stakeholders to integrate AI solutions into customer-facing systems. Documented and maintained automation scripts, ensuring reproducibility and scalability.

AI & Coding Reviewer at Appen

May 1, 2023 - Present

AI prompt tutor and reviewer for coding and mathematics tasks, ensuring logical accuracy, instructional clarity, and effective model outputs. Developed and fine-tuned high-performance models designed to challenge state-of-the-art language systems, improving response accuracy and robustness. Reviewed LLM outputs in Spanish, Catalan, English, and French, with a focus on linguistic precision, contextual relevance, and compliance with AI safety protocols.

Project Manager & Data Analyst at Mola Oceans

March 31, 2023 - July 21, 2025

Processed and cleaned raw sensor data from unmanned surface vehicles (USVs) using Python and SQL, improving data accuracy by 30%. Developed a Python-based automation tool to standardize environmental data workflows and enhance predictive reliability. Led 3D design and additive manufacturing efforts, integrating cloud platforms to streamline prototyping and testing. Coordinated cross-functional teams across data science, engineering, and operations to deliver scalable visualization tools. Managed project timelines and technical deliverables across multiple environmental tech initiatives. Supported quality control processes for sensor datasets and ensured data integrity in automation pipelines.