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Senior Backend Engineer at Rep.ai. Location Information: Europe Only. . Headquarters:. . URL:. . https://rep.ai. . . Company Overview. Rep.ai. is building the next generation of live chat — powered by . human-level AI avatars. .. Tired of clunky, frustrating chatbot popups? So are we. Rep.ai reimagines online communication by replacing outdated bots with . AI-powered video avatars. that feel like talking to a real human — but available 24/7, infinitely scalable, and trained to convert. See it in action at . rep.ai. .. Job Description. We’re hiring a . Senior Software Engineer. to join our core team and help build the infrastructure behind AI Live Chat. You’ll work on systems that power real-time interactions, intelligent agent behaviors, and seamless integrations across the web — all at scale.. This is a high-impact role for someone who thrives in fast-moving environments, loves clean code, and wants to help shape the future of AI-powered customer experience.. What You’ll Do. Build core systems. using Python, Postgres, and AWS.. Design and maintain APIs. that support real-time video chat and AI agent behavior.. Optimize performance and scalability. , ensuring our AI avatars feel fast and natural.. Harden security. , especially in cloud environments, and proactively mitigate vulnerabilities.. Write clean, testable code. , and help maintain high engineering standards through code review and documentation.. Solve hard problems. , debug complex issues, and help evolve our system architecture as we scale.. What We’re Looking For. 8+ years of experience in software development with strong fluency in . Python. Deep knowledge of . Postgres. and SQL. Production experience with . AWS. services. Familiarity with front-end technologies and frameworks (e.g., React). Strong grasp of . RESTful API design. Git proficiency and comfort with version control workflows. A track record of writing clean, maintainable, and efficient code. Excellent problem-solving and communication skills. Experience in . agile teams. and working asynchronously. Bonus: leadership or mentoring experience. Why Join Us. Competitive compensation. Fully remote / async team. A chance to shape the future of how humans and AI interact online. If you’re an experienced engineer ready to build ambitious, intelligent systems with real-world impact — . we’d love to hear from you.. 👉 Check out what we’re building at . rep.ai. and apply now.. . To apply:. . https://weworkremotely.com/remote-jobs/rep-ai-senior-backend-engineer.