V
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- Handle memory by separating lasting preferences from temporary instructions and managing corrections, outdated information, and deletions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
