Full Stack Engineer (Ruby on Rails, Hotwire, Turbo) - Up to €120k Join One of the Fastest-Growing AI Companies on the Planet (30M+ Users and Counting!) A-Tech is partnering with one of the Top 15 Largest and Fastest-Growing AI Companies globally. In less than two years, they’ve scaled to over 30 million users , redefined what it means to connect with AI, and launched a flagship product that dominates the AI companionship space. Now, they’re building a second product set to transform the creator economy: think best-in-class tools for AI video, image generation, and storytelling, accessible to every creator. Their mission? To create human-first AI that’s safe, ethical, and emotionally intelligent. Backed by elite leadership (ex-IPO founders, ex-Blackstone, Deloitte Fast50) and a global remote team of 55+ top-tier engineers, product minds, and creatives , this is your chance to build groundbreaking AI at scale. We’re looking for a product-driven Full-Stack Engineer to help build, refine, and scale core systems in a fast-paced, high-growth environment. You’ll work across frontend and backend -writing elegant Rails code, leveraging Hotwire for slick UI, and shipping user-facing features that power millions of conversations a day. You’ll be trusted with meaningful ownership and encouraged to move fast, collaborate deeply, and raise the bar every day. What You’ll Work On: Build features end-to-end across Ruby on Rails + Hotwire (Stimulus, TurboFrames, TurboStreams) Own both frontend and backend tasks from design to deployment Partner with Product, SREs, and Data Scientists to ship high-performance, user-centric features Maintain clean code quality through PR reviews, testing, and refactoring Help shape the product roadmap alongside world-class leadership Your Background: 3+ years of software engineering experience, ideally in product-focused, fast-moving environments Strong backend expertise in Ruby on Rails Solid frontend experienceusing Hotwire , Stimulus, TurboFrames, and TurboStreams Experience building and scaling user-facing features for large-scale web applications Excellent communication, collaboration, and ownership mindset A passion for AI, cutting-edge tech, and building delightful user experiences Bonus: if you’re comfortable working on products involving uncensored AI models, NSFW content , or content moderation. Why You’ll Love This Role: 100% Remote with async-friendly culture and global teammates (have a B2B or Contractor contract) Massive growth : 30M+ users in 18 months - aiming for 100M+ next Tech-forward team with full access to GPT-4, Mistral, Hugging Face Pro Proven leadership from IPO’d companies and world-class startups Real product ownership - you’re not just shipping code, you’re shaping the product Ethical AI backed by a proprietary internal moderation engine Company laptop + $200 wellbeing budget #J-18808-Ljbffr