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Backend Engineer focused on AI Agents, Memory & Context

Vantum
Contract type
Ongoing
Work mode
100% remote
Experience
3 years

Job description

Key details

  • Build and improve the prompts, memory, context, and backend systems behind Ask Vantum's chat harness
  • Write, test, and refine system prompts and model behavior instructions
  • Manage context by deciding what the model needs each turn, what to retrieve, and what to leave out
  • Handle memory by separating lasting preferences from temporary instructions and managing corrections, outdated information, and deletions
  • Build queries and retrieval to pull relevant tasks, goals, calendar entries, notes, and documents
  • Build tool execution actions that validate inputs, enforce permissions, and handle failures
  • Monitor reliability and evaluation by tracing bad responses, reproducing failures, and verifying improvements
  • Monitor response quality, latency, and cost while keeping client information properly scoped
  • Company mission
  • Information not specified

Primary stack

Core technologies

TypeScript

Benefits

  • Work closely with the founders and see feedback from real users
  • Have a say in how we solve problems
  • Room to take on broader technical ownership as you demonstrate judgment and impact

Requirements & details

  • Strong backend fundamentals and ability to get useful, reliable behavior from language models
  • Ability to write precise prompts and explain how instructions, examples, tool descriptions, and output schemas affect behavior
  • Ability to debug beyond the prompt to identify unclear instructions, missing context, poor retrieval, tool failures, or application code issues
  • Ability to test changes by comparing behavior across representative cases, tracking prompt versions, and checking for regressions
  • Ability to build solid backend systems with maintainable TypeScript, validated APIs, scoped database queries, and safe persistence changes
  • Ability to show work by walking through something you built, explaining decisions, and describing a failure you investigated
  • Clear communication in English for system prompts, technical discussions, and PRs
  • Ownership mindset: clarify ambiguous work, flag blockers early, and carry changes through to verification
  • Experience with chat systems, agent harnesses, memory, or retrieval is a strong advantage
  • Demonstrated ability matters more than years of experience, degrees, or employer names
  • TypeScript, Next.js, PostgreSQL, Prisma, OpenRouter
  • TypeScript

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