[Hiring] Full-Stack Engineer (AI-First) @Fulcrum

Role Description

We are looking for a Full-Stack Engineer (AI-First) who will help build the MVP and shape the technical foundation of the product. The role combines full-stack development with AI-driven workflows. The engineer will:

• Design and develop core product functionality for an AI-powered platform with autonomous agents.
• Build and improve the agent runtime that allows AI agents to execute tasks, interact with tools, and run in isolated environments.
• Develop chat-based and conversational interfaces that enable users to interact naturally with their AI agents.
• Implement and evolve the memory system that allows agents to learn from conversations and store long-term context.
• Design and build APIs and backend services powering agents, integrations, and real-time features.
• Work with vector databases and RAG pipelines to support intelligent retrieval and context building.
• Build real-time experiences (streaming responses, live updates) for interactive agent execution.
• Participate in building the multi-agent orchestration layer, enabling collaboration between multiple AI agents.
• Contribute to the AI tool ecosystem, integrating external services and building extensible agent skills.
• Collaborate with product, design, and engineering teams to iterate quickly and deliver new features.

Qualifications

• 3+ years of experience with JavaScript / TypeScript.
• Strong experience with React (React 18+) and Node.js.
• Experience building applications with Server-Side Rendering (SSR).
• Experience developing REST APIs.
• Experience integrating LLM APIs (OpenAI, Anthropic, or similar).
• Experience working with databases (experience with SurrealDB or similar NoSQL databases is a plus).
• Experience with Redis or streaming systems (e.g., Redis Streams), also Docker and containerized environments.
• Experience with Git-based workflows and CI/CD pipelines.
• Understanding of basic security principles in web applications.
• Ability to work in an AI-powered development workflow (using modern AI tools in development), with AI agents / agentic systems.
• Experience with Own Agent Building.

Requirements

• Experience working with multi-agent systems (agent orchestration, task delegation, agent-to-agent communication).
• Experience building RAG pipelines and working with vector databases (pgvector, Pinecone, Weaviate, SurrealDB vector).
• Experience integrating MCP (Model Context Protocol) servers or building extensible agent tools.
• Experience with real-time communication (Server-Sent Events, WebSockets, Redis Pub/Sub).
• Experience with browser automation tools such as Playwright or Puppeteer.
• Experience deploying applications in container-based cloud environments (Railway or similar platforms).
• Experience building modern UI systems using Tailwind and component libraries (e.g., shadcn/ui).

Benefits

• Flexible schedule & opportunity to work remotely or workspace in Kyiv (kooperativ.cc).
• Friendly & open team who have fun creating cool projects together.
• Opportunity to boost your professional & personal growth.
• Regular team gathering activities.
• 20 business days of paid vacation + UA national holidays.
• Medical insurance full coverage.
• 10 + 5 days paid sick leave.