Python Developer (AI focus)

WeSoftYou is an Inc. 5000 US-based product development company delivering software for venture-backed startups and enterprise organizations. WeSoftYou creates web and mobile solutions and custom B2B and B2C applications for various industries and business areas, including Healthcare, e-Learning, Retail, Web3, Fintech, and AdTech. About the Role We are looking for a highly skilled Python Developer to join our engineering team and help build scalable, AI-powered backend solutions. In this role, you will be responsible for designing, developing, and maintaining robust backend services, integrating advanced AI capabilities, and working with modern retrieval and knowledge management systems. You will collaborate closely with product managers, AI engineers, and frontend developers to deliver high-performance applications that leverage Large Language Models (LLMs), external data providers, and intelligent automation workflows. Responsibilities Design, develop, and maintain scalable backend services using Python. Build and enhance RESTful APIs using Django REST Framework and FastAPI. Integrate and optimize AI services, including Large Language Models (LLMs) and third-party model APIs. Develop and maintain Retrieval-Augmented Generation (RAG) systems, including vector databases, embedding pipelines, and retrieval mechanisms. Implement AI orchestration workflows using LangChain and related frameworks. Integrate multiple external APIs and data providers into backend systems. Design reliable, maintainable, and high-performance system architectures. Participate in technical design discussions, code reviews, and architectural decisions. Ensure software quality through automated testing, CI/CD pipelines, and monitoring practices. Troubleshoot and resolve production issues while continuously improving system reliability and performance. 3+ years of strong commercial experience with Python. Proven experience with Django REST Framework and FastAPI. Hands-on production experience integrating AI solutions, including LLMs and model APIs. Strong knowledge of LangChain and Retrieval-Augmented Generation (RAG) architectures. Experience working with vector databases, embeddings, semantic search, and retrieval systems. Solid experience integrating multiple third-party APIs and external data sources. Strong understanding of software architecture and system design principles. Experience building scalable and reliable backend systems. Knowledge of CI/CD processes and modern DevOps practices. Experience with automated testing and application monitoring. Strong problem-solving skills and ability to work independently. English proficiency at B2 level or higher — mandatory for daily written and verbal communication with the international team. What we offer: 📈 Professional Growth opportunities: Ambitious goals and interesting projects; Regular & transparent performance review and feedback process; Possibility for both vertical or horizontal growth (in case you want to try a different path). 😌 Comfortable Working conditions Flexible working hours; Provision of required equipment; Remote working model. 🎁 Benefits program 18 paid days off + 2 public holidays; Free tax reporting support by our Financial department; Help with individual entrepreneurs’ questions and accounting support; Financial support and additional days off for various occasions (e.g. marriage, childbirth, etc.);