Senior Backend Developer (AI agents experise and VPN projects)

• We’re seeking a super-experienced Senior Back-end Developer with deep expertise in JavaScript/TypeScript, particularly in Node.js, combined with practical experience in AI prompt engineering. You’ll architect, build, and optimize scalable applications that seamlessly integrate AI-assisted functionalities and modern backends.
• Prior experience with VPN services and network protocols.

Requirements

Position name: Senior Node.js Developer(with AI agents experience) for VPN Mobile App
Level: Senior

Hard skills:

• 8+ years of Software Engineering experience
• Strong experience with Node.js (Express.js, Koa.js, Nest.js)
• Strong Software Design knowledge: OOD, FP, Design patterns
• Experience building and maintaining VPN, proxy, and secure networking backend systems
• Solid understanding of network protocols, tunneling, traffic routing, and encryption standards
• Practical hands-on experience with AI prompt engineering, leveraging ArgumentCode, ClaudeCode, Cursor, or equivalent developer-AI tools.
• Deep understanding of RESTful and GraphQL APIs, modern web performance, and security.
• Solid understanding of LLM context design, tool integration, and code-generation workflows.
• Excellent knowledge of modern systems architecture components including microservices, event sourcing, and distributed data processing systems
• Advanced experience with SQL databases, especially PostgreSQL
• Experience with Docker & CI/CD processes
• Experience with AWS (or similar services like GCP or Azure)
• Experience with Serverless framework, AWS Lambdas, AWS CloudFormation
• Knowledge of Agile (preferably SCRUM) development practices