HighLevel

Lead Backend Engineer – Calendar AI

HighLevel

full-time

Posted on:

Location Type: Remote

Location: Remote • 🇮🇳 India

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Job Level

Senior

Tech Stack

GoJavaScriptNode.jsTypeScript

About the role

  • Design and implement LLM-powered onboarding assistants using Google/OpenAI/Anthropic models with deterministic orchestration (LangChain, LlamaIndex, custom pipelines)
  • Build RAG workflows using vector databases (Pinecone, Weaviate, Qdrant, pgvector) to inject contextual booking data into model prompts
  • Develop AI-driven configuration engines that translate natural language into structured booking primitives (services, schedules, resources, capacity, pricing rules)
  • Design optimization models for resource utilization, workload distribution, capacity forecasting, and conflict reduction
  • Integrate AI pipelines into backend systems using Node.js/TypeScript/Go services
  • Build scheduling-aware reasoning modules that handle constraints, buffers, lead times, resource availability, and business rules
  • Create scalable data pipelines for embeddings generation, context indexing, and model fine-tuning/hybrid retrieval
  • Implement latency-optimized inference orchestration with streaming responses, caching, and hybrid decision engines
  • Own the AI Runtime Layer enabling vertical-specific booking logic, plugins, actions, and smart suggestions
  • Lead and mentor the engineering team, enforce architectural standards, and drive long-term AI roadmap

Requirements

  • 5+ years of backend engineering experience, with at least 2 years building LLM, RAG or intelligent systems
  • Experience with OpenAI/Anthropic/Google/Meta LLMs (GPT-4+, Claude, Gemini, Llama)
  • Strong with LangChain, LlamaIndex, or custom LLM orchestration frameworks
  • Expertise with RAG architectures
  • Experience building prompt pipelines, tools/agents, and compound reasoning workflows
  • Comfort with guardrails, validation layers, hallucination reduction, and safety
  • Strong proficiency in Node.js/TypeScript/Go for platform integration

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
LLMRAGLangChainLlamaIndexNode.jsTypeScriptGovector databasesembeddings generationinference orchestration
Soft skills
leadershipmentoringarchitectural standards enforcementroadmap development