Senior Researcher in Theoretical Photonics, Simulation and Initial Prototyping
Location: Barcelona (Hospitalet de Llobregat) and Laboratories | On-site
Start date: Immediate
Project: Deep Tech | Photonics | Microelectronics | R&D&I
Contract type: Temporary project-based (6–12 months, with possibility of extension)
What are we looking for?
As part of the groundbreaking Tarranix Project, we are seeking a senior researcher with experience in advanced photonics who is capable of:
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Evaluating the scientific feasibility of a 3D optical transistor with six logical states based on light polarization
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Simulating its behavior using specialized software (training provided if needed)
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Developing and characterizing an initial functional prototype at the millimetric ornanometric scale to validate its basic performance
This is a strategic position that will define the technological core of a one-of-a-kind photonic chip, with the potential to overcome silicon limitations and offer a viable alternative to quantum computing.
Responsibilities
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In-depth review of the state of the art in multilevel photonic logic and advanced optical materials
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Development and characterization of the physical and mathematical model of the proposed transistor
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Writing of the scientific feasibility report of the device
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Functional simulation using tools such as Lumerical, COMSOL, or similar (with team support)
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Design and implementation of an initial physical prototype (optical bench or microfabrication)
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Execution or support of the experimental optical characterization of the prototype: spectral analysis, insertion loss, polarization response, etc.
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Comparative analysis with conventional electronic transistors
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Collaboration with the chip design team for future scaling phases
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Contribution to scientific publications, patent writing, and participation in international conferences
Requirements
Education
PhD in Physics, Photonics, Applied Optics, Nanoscience, or related fields
Experience
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5+ years of research in advanced photonics, theoretical optics, or optoelectronic device design
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Experience in designing and experimentally characterizing integrated photonic circuits
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Relevant publications in international scientific journals
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Experience in prototyping (millimetric or nanometric scale) is desirable, but not required
Skills
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Strategic scientific vision, rigorous reasoning, and technical creativity
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Ability to work in a multidisciplinary team
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Good command of technical English
What we offer
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Direct participation in a disruptive deep-tech project with global impact
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Collaboration with experts in photonic design, materials science, AI, and advanced computing
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Flexible hours and potential compatibility with academic career
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Scientific recognition as co-author of the foundational concept of the Tarranix transistor
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Long-term career prospects as Head of R&D in Photonic Computing
How to apply
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Send your updated CV, cover letter (max. 1 page), and scientific references
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Application deadline: Open until the position is filled
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Email subject: Application – Photonics Researcher Tarranix
About Tarranix
Tarranix is a science and technology initiative based in Spain focused on the development of the first 3D multilevel photonic chip. This chip is based on spherical optical transistors capable of representing six logical states using light polarization. Supported by public funding and industrial partnerships, Tarranix represents a new paradigm in computing, with potential applications in AI, telecommunications, and cybersecurity.
Frontend 3D Developer – React & Immersive Environments
Location: Barcelona / On-site
Contract type: Full-time or internship agreement
Start date: Immediate
At BrainLab Fira, we are building a virtual world that brings together education, culture, and creativity. Our mission is to offer an interactive experience where anyone can learn, explore and connect in a visual, accessible, and meaningful way. The project is growing fast, with new spaces, customizable avatars, and features designed to make knowledge an immersive and engaging experience.
We’re looking for a frontend developer with experience in React and web 3D technologies who shares this vision. Someone with strong technical skills and a sensitivity for user experience. A team player who enjoys tackling complex challenges and can turn ideas into interactive interfaces and 3D environments accessible from any browser.
Purpose of the Role
The main objective of this role is to develop and implement immersive interfaces and experiences for metaverse projects using React and advanced 3D web technologies.
This position is key to building products that combine 3D visualization, user interaction, and technical performance, supporting the project’s creative and technological growth.
Main Responsibilities
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Develop user interfaces using React.js, including tools such as Next.js and Redux
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Integrate graphic engines such as Three.js, Babylon.js, or React Three Fiber
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Connect experiences with REST APIs and WebSockets for real-time interaction
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Collaborate with UX/UI designers to create intuitive interfaces
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Optimize performance and load of 3D scenes in web browsers
Additional Responsibilities
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Implement support for WebXR, AR, or VR as needed
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Participate in code reviews, continuous integration, and development best practices
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Document code and maintain project structure
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Support backend and deployment tasks if needed (Node.js, Docker, Vercel, etc.)
Required Education
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Minimum: University degree or higher vocational training in Computer Engineering,Web Development, or related fields
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Additional preferred training: Courses in React.js, game development,WebGL/WebXR, or 3D UX
Recommended Experience
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At least 1 year working with React in production
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Experience in projects involving 3D engines or interactive web development
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Experience in video games, virtual reality, or digital innovation sectors is a plus
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Experience with Node.js, databases, and cloud deployment is desirable
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For internships, no prior experience is required, although academic or personal projects will be valued
Technical Skills
Required:
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React.js, Next.js,JavaScript/TypeScript
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React Three Fiber, Three.js, Babylon.js
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Git
Preferred:
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Vite, Webpack, ESLint
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Figma for design integration
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Testing with Jest or Cypress
Valuable knowledge:
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WebGL, WebXR, Unity Web Export
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Backend: Node.js, Express, MongoDB or PostgreSQL
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DevOps: Docker, AWS, Vercel, Heroku
What We Offer
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Involvement in a real project with social and cultural impact
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Flexible schedule and option for hybrid or remote work
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Office located in Hospitalet de Llobregat, next to Fira Barcelona
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Open, creative team with a long-term vision
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A space for technical, creative, and personal growth
How to Apply
To learn more about our work culture, visit our LinkedIn profile: https://www.linkedin.com/company/brainlabfira
3D Technical Artist (specialized in web-based videogames)
Location: Barcelona / On-site
Contract type: Full-time or internship agreement
Start date: Immediate
At BrainLab Fira, we are building a virtual world that blends education, culture, and creativity. Our goal is to offer an interactive experience where anyone can learn, explore, and connect in a visual and accessible way. The project is rapidly growing, with new spaces, customizable avatars, and features designed to make learning an immersive and engaging experience.
We are looking for someone who enjoys turning ideas into form and texture. A person with an artistic eye and a technical mind, who feels comfortable working in a team and knows how to bring environments, objects, and characters to life in a way that works smoothly on the web.
Your Role in the Team
You will be responsible for modeling and optimizing low poly 3D assets to ensure they perform well in web browsers.
Your work will help bring our virtual world to life, balancing visual aesthetics with technical efficiency.
Responsibilities
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Low poly 3D modeling with Blender, optimized for web environments (WebGL,Three.js, Unity, etc.)
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Texturing models in Substance Painter using PBR maps
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Applying materials and shaders, basic rigging, and weight painting
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Designing UX/UI elements that support intuitive user experiences
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Creating sketches and concept art for characters or props
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Using Marvelous Designer for fabric and clothing simulations
Additional Skills Valued
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Basic animation (pose-to-pose, idle/walk cycles)
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Rigging experience or basic knowledge of Unity or Unreal Engine
Required Education
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Minimum: Bachelor's degree, Master’s degree, or Higher Vocational Training in 3D Design, Animation, Fine Arts, Digital Arts, or related fields
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Preferred: Courses or certifications in texturing, rigging, 3D animation, or UX/UIdesign
Recommended Experience
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At least 1 year of experience in real projects such as video games, interactive environments, or 3D web experiences
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Previous experience in video game development (indie, commercial, or academic) is highly valued
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Experience working in multidisciplinary teams or animation studios is a plus
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No prior experience is required for internship positions, but academic or personal projects will be taken into account
Essential Tools
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Blender (intermediate to advanced level)
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Substance Painter
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Photoshop (for editing textures and 2D assets)
Nice-to-Have Tools
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ZBrush
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Marvelous Designer
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Unity or Unreal Engine
What We Offer
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Stability and room to grow
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Flexible working hours and remote-friendly options
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Participation in a purpose-driven project with educational impact
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A creative, flat, and collaborative work environment
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Private office in Hospitalet de Llobregat, available whenever you want to come in
How to Apply
To learn more about our work culture, visit our LinkedIn profile: https://www.linkedin.com/company/brainlabfira