Freelance | Fully Remote | Full-time | 2-week contract | Immediate start We’re looking for an experienced Full-Stack Developer with strong back-end expertise to support an innovative project focused on AI-powered media tools, automated workflows and video processing. You’ll take ownership of developing and integrating API-driven applications, combining responsive front-end experiences with robust back-end systems that automate AI-generated content, video production and digital delivery. This is a hands-on development role for someone with strong API integration experience, who can independently build scalable applications, manage complex asynchronous workflows and work with emerging AI media technologies. What you'll be doing: Developing responsive, mobile-first applications using React or Next.js, optimised for iPad kiosk experiences Building robust back-end services using Node.js or Python Developing and managing webhooks, job queues and asynchronous workflows Integrating AI platforms including Anthropic (Claude), Runway and ElevenLabs through APIs Managing structured JSON outputs and automated data processing Implementing cloud storage solutions such as AWS S3 and databases including Postgres, Supabase or Airtable Building automated video processing workflows using FFmpeg for video stitching, audio replacement and text overlays Integrating image quality checks using AWS Rekognition or MediaPipe Developing automated email and SMS delivery workflows linking users to hosted video content Ensuring secure data handling and compliance with GDPR and biometric privacy requirements Testing, troubleshooting and optimising integrations to ensure reliable performance What you'll bring: Strong full-stack development experience, with particular expertise in back-end development and API-driven applications Proficiency in React or Next.js alongside Node.js or Python Proven experience building API integrations, webhooks and asynchronous processing workflows Experience working with AI APIs, ideally including Claude, Runway or ElevenLabs Strong understanding of structured JSON data and automated workflows Experience with cloud storage and databases such as AWS S3, Postgres, Supabase or Airtable Knowledge of video processing technologies, particularly FFmpeg Familiarity with image recognition and quality-checking tools such as AWS Rekognition or MediaPipe Understanding of secure data management, GDPR and biometric privacy considerations Experience developing responsive applications for mobile and tablet devices Ability to work independently, troubleshoot complex integrations and deliver within tight project timelines Ideally, experience with lip-sync tools such as HeyGen or Sync Labs, live event activations, kiosk applications or prompt testing and quality control workflows If you’re a Full-Stack Developer with a passion for AI-powered applications, media automation and building innovative digital experiences, and enjoy taking ownership of technically challenging projects, we’d love to hear from you!