Full Stack Web Developer (Frontend / Backend)

About the role

Largo is seeking a Full Stack Web Developer to join its Lausanne office and help build user‑facing platforms that deliver AI‑driven audience insights. You will work closely with data‑science and AI teams to turn complex simulation models into intuitive web experiences for global clients in entertainment and advertising.

Key responsibilities

• Design and develop high‑performance dashboards that visualise AI insights, digital twin simulations and predictive analytics.
• Build scalable backend APIs and micro‑services to process large audience datasets, simulation models and media assets.
• Collaborate with AI engineers to integrate proprietary AI workflows into client‑facing features.
• Optimise applications for fast data visualisation, low latency and high stability.
• Participate in code reviews, architecture decisions, automated testing and CI/CD pipelines.

Required profile

• Minimum 3 years of professional full‑stack development experience.
• Strong product sense and curiosity about emerging technologies.
• Attention to detail to ensure seamless user experiences.

Required skills

• JavaScript / TypeScript
• React or Vue.js (or similar modern frameworks)
• D3.js, Chart.js, Recharts for data visualisation
• Python (FastAPI, Django, Flask) or Node.js for backend APIs
• PostgreSQL and NoSQL/key‑value stores
• Docker and containerised deployments
• Cloud platforms: AWS or GCP