Senior Full-Stack Developer

AITHENA 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.
We 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
• 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)
• Flexible working hours – we care about you (!) and your output
• English and Polish classes 2 times a week (online)
• Bright and memorable corporate life: corporate parties, gifts to employees on significant dates