Senior Software Engineer (TypeScript / React / AWS) - AI startup

💰 Salary: 25 000 – 28 000 PLN net/month (B2B) + 26 days paid annual leave + equity (ESOP)📍 Location: Remote (Poland) + meetup in Poznań once per monthOur client is an early-stage startup building a real-time AI platform that supports professionals during live conversations. The system processes interactions in real time and delivers contextual insights, knowledge, and guidance while conversations are happening.The founding team has strong experience in distributed systems, AI platforms, and enterprise SaaS and is currently expanding the engineering team to accelerate product development.RoleThe client is looking for a Senior Software Engineer who enjoys owning features end-to-end, from frontend interfaces to backend services and cloud infrastructure. You will work closely with the founding team on building a real-time AI-powered product, contributing to both product development and technical architecture.ResponsibilitiesBuild full-stack features using TypeScriptDevelop React-based user interfacesDesign and maintain backend services and APIsWork with AWS cloud infrastructureBuild and run Docker-based servicesImprove performance and reliability of real-time systemsRequirementsStrong experience with TypeScript and ReactHands-on experience with AWSExperience with Docker and LinuxComfortable working with Git workflowsFluent EnglishExperience working in remote teamsNice to HaveExpressTailwind CSSExperience with real-time systemsKnowledge of WebSockets / streamingExperience with LLM frameworks (e.g. LangChain)What the Client OffersOpportunity to build a product from an early stageDirect influence on architecture and product directionWork with experienced foundersRemote-first environmentCompetitive salary + equityHigh level of ownership and autonomy