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 month Our 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. Role The 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. Responsibilities • Build full-stack features using TypeScript • Develop React-based user interfaces • Design and maintain backend services and APIs • Work with AWS cloud infrastructure • Build and run Docker-based services • Improve performance and reliability of real-time systems Requirements • Strong experience with TypeScript and React • Hands-on experience with AWS • Experience with Docker and Linux • Comfortable working with Git workflows • Fluent English • Experience working in remote teams Nice to Have • Express • Tailwind CSS • Experience with real-time systems • Knowledge of WebSockets / streaming • Experience with LLM frameworks (e.g. LangChain) What the Client Offers • Opportunity to build a product from an early stage • Direct influence on architecture and product direction • Work with experienced founders • Remote-first environment • Competitive salary + equity • High level of ownership and autonomy