Senior Software Engineer (Vanilla JavaScript / WebGL)

Voovio is a global deep-tech company, based in Spain and Houston (USA). Through photorealistic 3D models and our patented Enhanced Reality technology, we help process industry leaders transform their processes into digital simulations and tools.

Want to work in a collaborative international environment? Do you thrive on building high-impact technology used by major global clients? Join Voovio as we grow our engineering team!

Job Description

We are looking for a Senior Software Engineer with strong fundamentals in software development and architecture to join our development team in Spain. A solid background in mathematics (geometry and linear algebra) and experience with WebGL is a huge plus.

This role is best suited for someone who enjoys writing high-performance, framework-free solutions from scratch.
You will have a unique opportunity to shape and drive the development of a core part of our proprietary front-end library, with direct impact on end-user experience.

This is a remote role for candidates based in Spain and authorized to work in the country.

Key Responsibilities

• Lead the design, development, and optimization of our proprietary JavaScript-based front-end library.
• Collaborate with cross-functional teams to define requirements and deliver new features.
• Write and maintain efficient, clean and reusable code with minimal external dependencies.
• Ensure high performance and compatibility across different browsers and devices.
• Develop interactive 3D experiences using WebGL where applicable.

Required Qualifications:

• University degree in Computer Science, Engineering, Mathematics, or related field.
• At least 5 years of professional software development experience.
• Deep expertise in vanilla JavaScript, HTML5, and CSS.
• Experience building complex browser-based tools or libraries from scratch.
• Strong understanding of web technologies, browser behavior, performance, and layout/rendering.
• Solid mathematical foundation (e.g., geometry, linear algebra) and familiarity with WebGL is a plus.
• Excellent communication and collaboration skills.
• English level B2 or higher.
• Must reside in Spain and be legally authorized to work here.

Why Join Us

• 100% remote work from anywhere in Spain
• Flexible hours (8-hour workday; 7 hours in August)
• Competitive salary
• Optional benefits including restaurant vouchers, Caser Seguros discounts, etc.
• Autonomy to lead technical design on complex systems
• Ongoing learning and personal development support

If you are a passionate software engineer with a proven track record of deliverables and innovation, we’d love to hear from you!