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Alejandro Manzano DiazAM

Alejandro Manzano Diaz

Senior Unity Developer C# · Android/iOS/VR · Webgl

€200/day
Barcelona, ES
8-15 years

Average response time: 1 hour

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About Alejandro

Senior Unity Developer freelance with over 12 years of experience developing video games, interactive applications, VR/AR experiences, simulators, and cross-platform 3D solutions.

I work with Unity 3D and C# to create interactive products from scratch or integrate into existing teams, bringing a complete technical vision: architecture, gameplay, UI, optimization, integration of external services, testing, and build preparation.

I have participated in published projects for Android, iOS, web, desktop, and Nintendo, including interactive narrative apps, casual games, 3D prototypes, immersive experiences, and cross-platform solutions.

My profile combines advanced Unity development with a very practical product mindset. I can help companies, startups, and studios turn an idea into a functional prototype, improve an existing project, or develop a complete solution ready to grow.

Main Areas:

• Unity 3D / C#
• VR, AR, and immersive experiences
• Game Development and gameplay systems
• Simulators and interactive 3D applications
• Mobile, WebGL, desktop, and Nintendo
• System architecture and design patterns
• Integration with Firebase, AWS, APIs, and external services
• UI, user logic, and narrative systems
• Technical QA, testing, debugging, and optimization

I am looking to collaborate on projects where Unity is the foundation for creating solid, visual, and well-built interactive experiences: video games, 3D apps, simulators, interactive training, VR/AR, prototypes, or internal tools.

Specialties: Unity 3D, C#, Unity Developer, Unity Developer, Game Developer, video game development, gameplay, mobile games, Android, iOS, WebGL, VR, AR, virtual reality, augmented reality, simulators, 3D apps, interactive 3D, mobile apps, Firebase, AWS, APIs, debugging, testing, and optimization.
  • Spanish

    Native or bilingual

  • Catalan

    Native or bilingual

  • English

    Conversational

Can work on-site
Barcelona (up to 50km)

Experience

  • Gamelex Studio
    Senior Unity Developer Freelance
    VIDEO GAMES AND ANIMATION
    December 2022 - Today (3 years and 6 months)
    Barcelona, Spain
    Freelance development of projects in Unity 3D and C#, including video games,
    VR/AR experiences, simulators, 3D apps, interactive prototypes, and
    cross-platform solutions.
    I work on both greenfield projects and improving existing products,
    providing a complete technical vision: architecture, gameplay,
    UI, integration of external services, optimization, testing, debugging, and
    build preparation.
    Unity WebGL VR Artificial Intelligence Mobile Application
  • Serialify
    Unity Developer
    VIDEO GAMES AND ANIMATION
    October 2020 - December 2022 (2 years and 2 months)
    Barcelona, Spain
    Development in Unity 3D and C# for Serialify, a startup from Grupo Planeta focused on interactive stories where the user can make decisions and modify the development of the experience.

    The application was developed in Unity and published for Android, iOS, and web, combining interactive narrative, UI, user logic, and cross-platform content systems.

    Main Responsibilities:

    • Development of features in Unity 3D and C#
    • Implementation of interactive systems for branching stories
    • Integration of narrative content, decisions, and scene flow
    • Development and improvement of UI/UX within Unity
    • Product adaptation for Android, iOS, and web
    • Bug resolution, functional testing, and stability improvement
    • Collaboration with design, content, and product teams
    • Optimization and maintenance of existing features

    Project highlighted for combining technology, narrative, and user experience in a cross-platform interactive application.
    Unity 3D Android iOS C# AWS
  • Divertap
    Unity Game Developer
    VIDEO GAMES AND ANIMATION
    September 2015 - October 2019 (4 years and 1 month)
    Barcelona, Spain
    During this period, I worked as the lead developer on several titles, taking on key technical responsibilities from implementing game mechanics and systems to preparing builds, fixing bugs, and cross-platform adaptation.

    Experience highlighted by direct responsibility for complete published games, combining programming, product vision, problem-solving, and cross-platform development.
    Unity 3D Nintendo Cross-platform C# Android

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Education

  • Postgraduate degree in
    Universitat Oberta de Catalunya
    2020
    Posgrado en
  • Higher Technician in Cross-Platform Application Development Academic Discipline
    Centre d'Estudis Politècnics
    2015
    Técnico Superior en Desarrollo de Aplicaciones Multiplataforma Disciplina académica

Skill set

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