Skill needed: Terraform, Redis, Python, PostgreSQL, FastAPI, Asyncio, Amazon Web Services (AWS).
Employer: Supersonik
🚀 About SupersonikSupersonik helps B2B SaaS companies sell faster with AI-powered product demos. On a live video call, our AI Agent shares the screen to walk buyers through a personalized, interactive demo in any language. This lets teams skip long sales calls and focus on closing deals.We’re backed by Andreessen Horowitz (a16z) and work with leading SaaS companies worldwide.🧩 About the RoleWe’re hiring Staff Engineers (10+ years of experience) to join our core team in Barcelona.You’ll be solving complex, technical problems and shaping the product and architecture from day one. You should thrive in high-growth startup environments, be fluent in modern Python and async programming and know how to build scalable, event-driven systems. You care about fast, real-time systems and enjoy working at the intersection of performance, AI and great user experience.If you love solving first-principles problems, navigating ambiguity and want to build a product people love you’ll fit right in.What You’ll Work OnScale a real-time, event-driven backend architecture where milliseconds matterDesign and implement low-latency APIs using FastAPI and AsyncioSolve engineering challenges in performance optimization, observability, and resilienceEnd to end contributions from frontend to infrastructure.Collaborate on prompt engineering, LLM behaviors, LLM fine-tuning and UXBuild and maintain infrastructure-as-code with Terraform and AWSContribute to 0→1 product development with a small, fast-moving teamOur StackBackend: Python, FastAPI, Asyncio, Redis, PostgreSQLInfra: AWS, Terraform, CI/CDFrontend: ReactTooling: GitHub, Datadog, LinearBonus PointsExperience with LLMs (prompting, training, alignment)Experience with TTS, STT and real-time voiceExperience with browser automationsDeep knowledge of AWS, Terraform, and distributed systemsExperience shipping 0→1 products in a startupWhat You’ll GetAbove-average salarySignificant equity in a company backed by A16zFull ownership, real impact, and fast learning cyclesA tight-knit team that values clarity, speed, and smart execution