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Goldcast

Posted 1 Oct 2026

Founding Engineer (Backend + AI)

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Employment
Full time
Team
Software Engineering
Posted
1 Oct 2026

About the role

This is a hands-on founding engineering role where you will have significant ownership over architecture, technical direction, experimentation, and productionization.


Responsibilities:

  • Design and build production-grade LLM and Agentic AI systems from 01.
  • Develop multi-step AI agents capable of tool calling, reasoning, planning, and autonomous task execution.
  • Build agent orchestration using LangGraph, LangChain, or equivalent frameworks.
  • Implement agent memory, state management, context management, and retrieval systems.
  • Build RAG pipelines using embeddings, vector databases, retrieval, ranking, and context optimisation.
  • Design and maintain LLM evaluation and testing frameworks/harnesses for measuring agent and model performance.
  • Work with multiple LLM providers/models such as OpenAI, Anthropic, Gemini, open-source models, etc.
  • Build AI feedback loops using production trajectories, evaluations, user feedback, and task outcomes.
  • Optimise latency, token usage, inference cost, reliability, and task success rate.
  • Develop APIs and backend services using Python / FastAPI / Go / Node.js or equivalent.
  • Build production infrastructure using Docker, Kubernetes, cloud platforms, CI/CD, observability, and monitoring.
  • Collaborate closely with founders and product teams to identify high-impact AI use cases and rapidly prototype solutions.
  • Establish engineering best practices for AI reliability, evaluation, observability, safety, and scalability.

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