Senior FullStack Engineer (TypeScript, Node.js, AI)

About the Position

Radency is looking for a Senior FullStack Engineer (TypeScript, Node.js, AI) to work on an AI-first SaaS platform that allows AI agents to interact with the open web - finding, extracting and structuring data in real-time.

Responsibilities8

• Design and develop core API (endpoints, SDK)
• Build stable and understandable interfaces for AI agents and clients
• Work with processes of web data handling: search, extraction and structuring
• Optimize performance, latency, and reliability of the system
• Improve performance, reliability, and developer experience (auth, rate limiting, observability)
• Integrate AI frameworks (LangChain, CrewAI) into the product
• Collaborate with ML and infrastructure teams
• Take full responsibility for functionality development - from idea to production

Requirements7

• 5+ years of commercial development experience using TypeScript and Node.js
• Experience designing and developing APIs (REST / RPC / SDK)
• Experience integrating with external APIs
• Practical experience with AI/LLM stack: LangChain / CrewAI
• Understanding principles: performance optimization, rate limiting, authentication / authorization, observability
• Experience working in cross-functional teams and strong communication skills
• English - Upper-Intermediate+

Benefits5

• Training, health, and sports budgets — $750 per year
• 20 days of time off, 10 public holidays, unlimited sick leaves
• Remote-first work format
• Consistent support for the Armed Forces of Ukraine - as of March 2026, donated over 25 million UAH
• Do not work with Russian and Belarusian customers and engineers