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BJAK

Staff Software Engineer, AI Applications

Posted 2 Months Ago
Remote or Hybrid
Hiring Remotely in United States
Expert/Leader
Remote or Hybrid
Hiring Remotely in United States
Expert/Leader
Lead application engineering for an AI-powered email product across backend, mobile, and desktop platforms. Design reliable AI workflows involving orchestration, state, tool use, retries, fallbacks, and failure handling. Build APIs connecting AI capabilities to product experiences, make architectural trade-offs, establish observability and operational excellence, and lead a small team of senior engineers through hands-on technical mentorship and code development.
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About Act

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.

Our first application is an agent-first mobile communication app. We believe building applications that users use daily for communication, coordination and collaboration needs will help integrate AI into their lives. The net effect is to eliminate misinformation, achieve low coordination costs, enable high quality tasks and collaboration at scale with minimal or little prompting.

 
Role
  • Lead application architecture and engineering across backend, mobile and desktop platforms

  • Design systems for AI-powered workflows, including orchestration, state management, retries and failure recovery

  • Build and review backend services, APIs and integrations that connect AI systems with product features

  • Make technical decisions on system design, performance, reliability, security and infrastructure

  • Lead a small team of senior engineers through technical design, code reviews and engineering guidance

  • Work with ML and product teams to integrate AI capabilities into production applications

  • Improve system performance, monitoring, testing and production reliability

 
Requirements
  • 8+ years of software engineering experience, including technical leadership of production applications

  • Strong backend engineering expertise, including APIs, databases, distributed systems and cloud infrastructure

  • Experience designing and scaling systems across multiple services or application platforms

  • Hands-on experience integrating LLMs or AI-powered features into production applications

  • Ability to make architecture decisions, review code and resolve difficult engineering problems

  • Experience leading senior engineers through technical design, code reviews and mentorship

  • Strong understanding of system performance, concurrency, reliability and production monitoring

 
Nice to Have
  • Experience building AI agents, orchestration systems or multi-step workflows

  • Experience developing applications across web, mobile and desktop platforms

  • Experience with messaging, email, collaboration or productivity applications

  • Experience leading engineering teams in early-stage technology companies

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