Hi, I'm Juan José Serrano

Junior AI/ML Engineer • Software Architect • Team Leader

Currently working as a Junior AI/ML Engineer with 1+ years of experience in fine-tuning transformer models and building production ML systems. Specialized in LLMs, BERT, GPT, T5 architectures with expertise in PyTorch, TensorFlow, and PEFT. Strong software engineering foundation with clean architecture patterns and scalable system design. Started my professional journey at 16 and secured my first internship in sophomore year.

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Juan José Serrano Mora

About Me

Junior AI/ML Engineer with proven expertise in transformer models and production systems

Hello! I'm an AI/ML Engineer with a strong Software Engineering foundation

Started working at 16 and secured my first internship in my sophomore year. Currently a Junior AI/ML Engineer while pursuing my Bachelor's in AI/ML Engineering at Northern Arizona University. I specialize in fine-tuning transformer models (LLMs, BERT, GPT, T5), implementing software architecture patterns, and building scalable production ML systems. My approach combines 1+ years of hands-on AI/ML experience with solid software engineering principles, emphasizing clean architecture, modular design, and maintainable code for production-ready AI solutions.

AI/ML Experience 1+ years
Code Contributions 100k+ LOC
Specialty AI/ML + Software Eng
Leadership Team Lead & Mentor

My AI/ML engineering expertise and leadership experience include:

  • Fine-tuning Large Language Models (LLMs, BERT, GPT, T5) using PyTorch & TensorFlow
  • Building Production ML Pipelines with PEFT and Transformer Architectures
  • Optimizing Training/Inference Performance for Scalable AI Systems
  • Software Architecture Patterns for ML Systems & Clean Code Design
  • Team Leadership & Cross-functional Collaboration in AI Projects
  • DevOps for ML: Docker, Kubernetes, and CI/CD for AI Applications
  • Technical Documentation (1000+ pages) & Knowledge Transfer
  • Educational AI/ML Content Creation for Broad Audiences
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K+ Lines of Code
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Pages ML Documentation
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ML Models Fine-tuned
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Year as Junior AI/ML Engineer

Resume

My professional and academic journey

Junior AI/ML Engineer

Sept 2025 - Present

Imascono - Zaragoza, Spain

Current Role: Fine-tuning large language models (LLMs) across transformer architectures (text-to-text, image-to-text) using PyTorch, TensorFlow, Transformers, and PEFT. Production ML Systems: Developing and deploying machine learning pipelines from scratch, improving efficiency of training and inference processes. Real-world Impact: Implementing production-grade systems with emphasis on scalability, performance optimization, and business-ready AI solutions. Cross-functional Teamwork: Collaborating with engineering teams to deliver AI solutions that meet technical and business requirements.

PyTorch TensorFlow LLM Fine-tuning PEFT Production ML Pipelines

AI/ML Engineer Intern

Jun 2025 - Aug 2025

Imascono - Zaragoza, Spain

Transformer Model Expertise: Fine-tuned encoder, decoder, and encoder–decoder transformers, optimizing inference performance for various NLP and multi-modal tasks. OpenAI-Compatible API: Built a specialized API compatible with OpenAI standards for integration and user context management in production environments. Massive Code Contributions: Contributed 50K+ new lines of code and refactored 30K+ lines, applying ML engineering best practices and clean architecture patterns. ML Documentation Leadership: Authored 100+ pages of ML/LLM technical documentation covering model architectures, training pipelines, and evaluation protocols.

Transformer Models NLP OpenAI API ML Engineering Technical Documentation

DevOps Developer

Oct 2024 - Nov 2024

Entertainment Solutions - Zaragoza, Spain

PMS Development: Contributed to code development and troubleshooting in Go, PHP, JavaScript, CSS, and HTML for a comprehensive Property Management System, ensuring functionality across all services. DevOps Leadership: Supported DevOps workflows, leading code integration, debugging, and deployment processes. Team Collaboration: Collaborated with the engineering team to maintain service reliability and implement best practices for system maintenance.

Multi-language Development System Integration Team Collaboration Problem Solving

Software Engineer Intern

Jun 2024 - Aug 2024

Entertainment Solutions - Zaragoza, Spain

First Internship Achievement: Secured this position in my sophomore year, marking the beginning of my professional journey. Software Architecture Excellence: Applied software architecture principles (modular design, clean architecture, and design patterns) to build scalable and maintainable systems. PMS Expertise: Worked within Product Management Systems, collaborating in planning, development, and delivery workflows. Testing Innovation: Designed and implemented a dedicated testing service, ensuring reliability, automation, and integration. Best Practices Leadership: Followed and promoted best practices in code quality, refactoring, and documentation.

Software Architecture Clean Architecture Design Patterns Test Automation

Shift Lead / Barista

Jun 2023 - Dec 2023

Hotel Sauce, Zaragoza, Spain

Early Leadership Development: At age 18, took responsibility for the afternoon shift team, coordinating tasks, distributing roles, and ensuring smooth service operations. Multi-role Excellence: Worked as barista, waiter, and kitchen assistant, with additional responsibilities in sales and customer interaction. Team Development: Gained leadership and teamwork skills, fostering collaboration and maintaining service quality under high-demand periods. Skill Building: Strengthened abilities in public relations, customer service, sales, and active learning while managing team dynamics.

Team Leadership Multi-role Management Customer Relations High-pressure Performance

Construction Worker

Jun 2021 - Aug 2021, Jun 2022 - Aug 2022

Construction Projects, Zaragoza, Spain

Early Work Experience: Started working at age 16, gaining valuable work ethic and discipline during summer breaks from high school. Team Collaboration: Worked in collaborative teams to complete construction projects on schedule while adhering to strict safety standards. Physical & Mental Discipline: Gained hands-on experience in disciplined, physically demanding work environments, emphasizing reliability and responsibility. Project Support: Assisted in site preparation, equipment handling, and quality control to support timely project completion over two consecutive summers.

Work Ethic Teamwork Safety Standards Physical Discipline

Bachelor of Science, AI/ML Engineering

Graduating May 2026

Northern Arizona University – Flagstaff, AZ

Relevant Coursework: C, C++, Java, Python, Golang, TypeScript, bash, HTML and more. Core Subjects: Artificial Intelligence, Machine Learning, Unsupervised Learning, Deep Learning, Natural Language Processing. Final Year Focus: Advanced AI/ML systems, production machine learning, and real-world application development.

AI/ML Engineering Deep Learning NLP Multi-language Programming

NASA Space Apps Hackathon & CodeLab Hackathon

2023 - 2025

Team Lead / Participant

Leadership Excellence: Led 6+ member teams in project design and delivery under intense time pressure, demonstrating strong leadership capabilities. Agile Methodology: Applied agile collaboration, pair programming, and effective project coordination across multiple high-stakes hackathon events. Cross-functional Management: Successfully managed diverse teams with different technical backgrounds and skill levels. Innovation Under Pressure: Consistently delivered innovative solutions while maintaining team morale and productivity in competitive environments.

Team Leadership Agile Management Innovation High-pressure Performance

University Student Representative

2025 - Present

Northern Arizona University

Advocated for peers and coordinated initiatives across the department. Served as a liaison between students and faculty to improve academic programs and student experience.

Advocacy Communication Initiative Coordination

Technical Content Creator

Jun 2024 - Present

@oneaiengineer - Independent Creator

Educational Leadership: Specialized in content creation on TikTok, sharing engaging and educational videos about Computer Science, Artificial Intelligence, and Software Engineering. Community Impact: Mission to inspire curiosity, simplify technology, and make learning both accessible and enjoyable for a broad audience. Technical Communication: Blending creativity with technical expertise to transform complex AI/ML and software engineering topics into digestible content. Knowledge Transfer: Building a platform for technical education and community engagement in the tech space.

Technical Communication Educational Leadership Community Building Content Strategy
Show Resume

Projects

Open Source Projects

Interested in seeing more projects?

View GitHub

Skills

Technologies and tools I master

AI/ML & Deep Learning

PyTorch / TensorFlow 95%
Hugging Face Transformers 90%
LLM Fine-tuning & PEFT 88%
NLP & Multi-modal AI 85%

Software Engineering

Clean Architecture & Design Patterns 92%
Modular System Design 88%
Code Refactoring & Optimization 90%
Testing & Quality Assurance 85%

Leadership & Collaboration

Team Leadership & Management 90%
Cross-functional Collaboration 88%
Mentoring & Knowledge Transfer 85%
Technical Communication 92%

Tools & Frameworks

Python
Go
JavaScript
Docker
Kubernetes
Git

Recommendations

Professional testimonials from colleagues and supervisors

Dr. Óscar Rubio Martín

Technology Director at Imascono

Development of Innovative Products

August 10, 2025 • Direct Supervisor

"Juan José has been the best intern I've had in the last 5 years. From his very first week with us, he made an impressive impact: he quickly grasped the key concepts of LLMs and fine-tuning, and successfully debugged and optimized a fine-tuning project. Since then, he has continued to evolve the architecture, code, training datasets, and documentation."

"During this time, Juan José has consistently demonstrated hard work, strong skills in AI development, and a remarkable blend of passion and creativity."

AI/ML Development LLM Fine-tuning Problem Solving Documentation

José Ángel Caudevilla Casaus

DevOps Engineer at Trioteca

October 22, 2024 • Direct Supervisor

"I had the pleasure of working with Juan José at Entertainment Solutions, where he contributed to our software development team. Throughout his time with us, he demonstrated a strong foundation in programming, problem-solving, and software design."

Software Development Problem Solving Programming Software Design

Contact

Have a project in mind? Let's talk!

Email

jserranom04@gmail.com

Phone

(725) 290-5641

Location

Flagstaff, AZ

Availability

Mon - Sun: 6:00 - 20:00

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