Python Backend Developer

About company: System for optimization of different workforce strategies using AI.

About the product: Solution for searching and matching specialists with vacancies, that also helps with different stages of hiring like interviews, etc. There chatbot (NLP/LLM) and other AI based/ML solutions.

About the role: As a Python Backend Engineer you will be responsible for developing backend systems for LLM-based AI solutions, building and maintaining APIs, implementing RAG and ensuring seamless AI system integration.

Responsibilities:

• Integrate AI models with APIs, databases, and business applications;
• Implement RAG;
• Work with SQL databases (PostgreSQL) to store and manage AI-related data;
• Implement caching strategies and load balancing for efficient AI request handling;
• Write code (SOLID practices), all sorts of tests, and pair reviews;
• Communicate with product analysts, customer success, designers, other developers;
• Participate in SCRUM.

We are looking for:

• Education: Bachelor’s degree in Computer Science or equivalent experience;
• Python 5+ years with experience in backend frameworks (FastAPI);
• Experience with LLM APIs (e.g., OpenAI, Mistral);
• Knowledge of Retrieval-Augmented Generation (RAG) and working with vector databases (e.g., Opensearch);
• Experience with cloud platforms (AWS) and containerization (Docker);
• Proficiency in database management (SQLAlchemy, PostgreSQL);
• Proficiency in LangChain for prompt chaining, memory handling, and tool integrations;
• Experience designing and optimizing AI prompts;
• Strong English communication skills;
• Being into the latest AI advancements and experiment with state-of-the-art techniques.

As a plus:

• Experience with fine-tuning LLMs;
• Experience with AI Agents and autonomous workflows;
• Experience with microservices;
• Experience with message queues (RabbitMQ);
• Experience with Redis for caching, session management.

Work format: completely remote, full-time.

Timezone: Europe.