Senior Context Engineer

Responsibilities: - Build and scale the context and retrieval infrastructure powering AI agents. - Design ingestion, chunking, embedding, vectorization, and retrieval pipelines. - Develop integrations with platforms such as Slack, Notion, Mixpanel, Amplitude, and marketing tools. - Build low-latency semantic search and context APIs. - Design evaluation frameworks to improve retrieval quality and AI performance. - Own the architecture of AI knowledge and context systems end-to-end. Requirements: - Strong experience in Node.js and TypeScript. - Hands-on experience building production RAG (Retrieval-Augmented Generation) systems. - Experience with Vector Databases such as Pinecone, pgvector, Weaviate, or Milvus. - Strong understanding of Embeddings, Semantic Search, Hybrid Search, and Retrieval Pipelines. - Experience building third-party integrations using APIs, OAuth, and Webhooks. - Strong System Design and Distributed Systems knowledge. - Experience working on AI Agents, LLM-powered applications, or AI Infrastructure platforms. - Familiarity with AI development tools such as Claude, Cursor, OpenAI, LangChain, or LangGraph. Company Summary Propel helps clients unlock the full potential of their customer base. Our solutions empower clients to enhance retention, minimize churn, and drive revenue growth. By leveraging advanced segmentation strategies, we help our clients tailor experiences that resonate with their audience, maximizing the value of every customer interaction. Propel's lifecycle marketing solutions help transform the clients' customer relationships into lasting partnerships, ensuring their business thrives in a competitive landscape. We help elevate our clients' marketing strategy and turn their existing customers into loyal advocates! Here's the truth: most brands spend big on acquisition and hope customers stick around. But hope isn't a strategy. At Propel, we turn behavioral data and AI into lifecycle marketing that actually works - fewer churned users, higher LTV, and campaigns built on real insights, not guesswork. Personalization is the future of retention. As customer behavior evolves faster than ever, Propel is building the data and AI infrastructure that helps B2C brands deliver the right experience to every user, every time. That's not a goal. We're already doing it. Why Join Us At Propel, We're building the future of AI-powered retention. Global team, zero bureaucracy; if you're obsessed with lifecycle marketing, we want to talk. Understand what matters to our employees. Give them what they need to do their best work. We're a 100% remote team spread all across the world. We have a hybrid workplace policy and an outcome-oriented work culture.

Required Skills ['Node.js', 'Agentic AI', 'Generative AI', 'LLMs', 'Machine Learning', 'Orchestration']

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