Node.js Developer (+ LangChain, LangGraph, RAG)

Viseven Group is an international MarTech company specializing in interactive content and cloud solutions for global pharmaceutical companies since 2009. They are looking for a Node.js Developer to work on their eWizard web platform.

• Designing and implementing workflows for AI agents using LangChain, LangGraph, and context management tools
• Implementing AI-based search and recommendation systems using Retrieval-Augmented Generation (RAG) technology
• Conducting code reviews
• Fixing bugs and refactoring code
• Participating in task planning and estimation
• Writing unit tests and end-to-end tests
• Self-testing developed changes in the target environment
• Applying OOP principles and design patterns in practice
• Documenting stages of the development process for further support
• Tracking modern technologies and best practices for GenAI application development

• 4+ years of commercial experience in backend development
• Proficient in TypeScript and Node.js
• Deep knowledge of MongoDB and database design
• Practical experience with large language models: prompt engineering, RAG implementation, AI agent development
• Knowledge of AI tools and frameworks: LangChain, LangGraph, LangSmith
• Understanding vector databases, embeddings, and semantic search
• Strong understanding of software design principles/patterns and modern development practices
• English - at least Pre-Intermediate level

• Competitive remuneration and regular salary review
• Professional and career growth
• Paid vacation - 18 working days a year (20 working days after 2 years of collaboration)
• Sick leave with no documentation required - 4 working days a year
• Documented sick leave - 20 working days a year
• Family-related leave - 3 paid working days (in case of marriage, childbirth, or serious loss)
• Comprehensive medical insurance (including a massage course and physiotherapy)
• English language courses
• Opportunities to participate in professional forums and conferences
• Regular corporate events and team building
• Experienced team and friendly atmosphere
• Nice working environment: comfortable, fully equipped office and the possibility to work from home