Fullstack Engineer (AI Systems)

TL;DR

Fullstack Engineer (AI Systems): Building end-to-end product features for a proactive AI chat app that handles long-running workflows, persistent context, and real-world task completion with an accent on multi-step reasoning, external tool interactions, and reliability despite non-deterministic models. Focus on designing agent workflows for planning, failure recovery, real-time interactions, and integrating LLMs with memory and tools into production-grade systems.

Location: Remote from Singapore

Company

A1 is building a proactive AI chat app for everyday users, emphasizing high reliability for workflows, persistent context, and real-world actions.

What you will do

• Build end-to-end product features across frontend, backend, and AI integrations
• Design agent workflows handling planning, tool use, multi-step failures, and recovery
• Integrate LLMs, memory, and external tools into reliable production systems
• Develop real-time AI interactions with streaming, partial results, and low latency
• Improve system reliability, observability, and fallback mechanisms
• Collaborate with ML, backend, and product teams to ship features

Requirements

• Strong experience in fullstack engineering (frontend + backend)
• Solid understanding of system design and API architecture
• Experience with LLMs, RAG systems, or AI-powered applications
• Ability to handle ambiguity and make pragmatic decisions
• Strong ownership to take features from idea to production
• Comfort in fast-moving environments with evolving requirements

Culture & Benefits

• Work in small, high-talent-density, hands-on team
• Make collective decisions at rapid speed, balancing quality and learning
• Bring structure, exercise judgment, and execute independently

Hiring process

• Applications evaluated by technical team
• 3-4 interviews via virtual meetings and/or onsite
• Prompt decision with offer for strong fits