Senior Python Developer (LLM frameworks)

On The Spot Development is a software development company that builds R&D teams for heavily invested startups and tech companies from the UK, EU, and Israel.

This job opportunity is for a position within one of our teams. You will be directly employed by On The Spot and will collaborate closely with our partner companies, contributing to their product's journey.

‍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 Backend Developer to build scalable Python solutions, optimize performance, design RAG pipelines with LlamaIndex, and solve complex challenges in an Agile environment.

• Write clean, concise, and scalable Python 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
• Design and implement RAG pipelines based on LlamaIndex
• Work on performance optimization, testing, and troubleshooting

• Bachelor’s degree in Computer Science, Engineering, or relevant experience
• 7+ years of experience in Python development
• Proven experience with LLM frameworks (LlamaIndex or LangChain)
• Strong knowledge of PostgreSQL and experience with designing and implementing data-intensive systems
• Experience with cloud platforms (Google Cloud Platform, AWS, Azure)
• Solid understanding of software design principles, concurrency, synchronization, memory management, data structures, algorithms, etc.
• Ability to prioritize and organize effectively with good communication skills
• Strong analytical and troubleshooting skills

• Basic DevOps skills, including Google Cloud Platform, K8S, Docker, CI/CD, and GitHub actions
• Linux administration skills

• 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 supportin 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