Frontend Developer (AI)

Location: Leuven, Belgium; hybrid with 3 days on-site and 2 flexible days. Candidates applying from outside Belgium must have EU-wide work authorization. Visa support is available only to candidates already residing in Belgium.

Salary: €60,000–€75,000 gross per year for payroll, or €450–€540 per day for freelance; payroll representation bonus of €140–€200 per month.

Company

Engineering consulting company assigning the successful candidate to a client project involving a new AI inference optimization product.

What you will do

• Build the frontend of a new production software product for optimizing AI inference.
• Own frontend architecture and development from a clean slate through the first MVP.
• Collaborate with the designer to refine and implement complex UX and UI concepts.
• Evaluate and establish the core frontend technology stack, architecture, and coding standards.
• Integrate frontend components with backend APIs and AI services.
• Deliver responsive, accessible, performant, tested, and production-ready interfaces.

Requirements

• 3+ years of frontend development experience in a production environment.
• 3+ years of UX/UI design experience in a production environment.
• Strong practical familiarity with modern UX/UI principles and implementation.
• Hands-on experience with TypeScript, React, and TanStack, or similar modern frontend technologies.
• Fluent English.
• Bachelor’s degree in IT, Computer Science, Design, or equivalent proficiency gained through experience, including an additional 2–3 years of frontend work experience.

Culture & Benefits

• Permanent payroll or freelance B2B engagement available.
• Hybrid work arrangement with 3 on-site days and 2 flexible days.
• Visa support is limited to candidates already residing in Belgium.
• Immediate start.