About On The SpotWe bring startups and disruptive tech companies to the local market, offering engineers the opportunity to work on innovative, high-impact products. Join us and become a member of their R&D team while we take care of employment, HR support, a benefits package, and an enjoyable work environment.About the team‍AITHENA is a startup focused on creating an AI-powered tool to enhance the regulatory review process in the pharmaceutical industry.Our goal is to build an AI-powered assistant for document analysis and review related to pharmaceutical regulations, enabling efficient search and user query responses based on a comprehensive database of legal case documents.‍About the roleWe are seeking a Senior Full-Stack Developer to build and maintain robust backend services while implementing UI components for their own features within an existing application.The primary focus will be on backend development — designing scalable APIs, optimizing performance, and ensuring high reliability — while contributing to front-end tasks as needed to deliver complete, end-to-end functionality in an Agile environment.‍Responsibilities Write clean, concise, and scalable code, ensuring stability and proper unit testing Diagnose complex technical issues, evaluate options, and implement optimal solutions Implement new requirements in an Agile environment, adhering to architectural principles and standards Collaborate with the team to provide input on architecture and design, ensuring solutions are aligned with best practices

Work on performance optimization, testing, and troubleshooting

Requirements 5+ years of experience in development with Python Experienced in frontend development using React Strong analytical and troubleshooting skills Knowledge of PostgreSQL and experience with designing and implementing data-intensive systems Solid understanding of software design principles, concurrency, synchronization, memory management, data structures, algorithms, etc. Ability to prioritize and organize effectively with good communication skills English B1+ Nice to have Basic DevOps skills, including Google Cloud Platform, K8S, Docker, CI/CD, and GitHub actions Experience with LLM frameworks (LlamaIndex or LangChain) Linux administration skills ‍Benefits Work in a highly professional team. Informal and friendly atmosphere in the team Paid vacation — 20 business days per year, 100% sick leave payment for 10 business days Equipment provision Partially compensated educational costs (for courses, certifications, professional events, etc.) Legal and Accounting support in Poland Ability to work from our comfortable office in Warsaw at Prosta 51 5 sick days per year Medical insurance (after the end of the probationary period) English and Polish classes 2 times a week (online)