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PayoneerPosted 3 weeks ago

Principal Engineer (AI Fluent)

On-siteHerzliya, Tel Aviv, Israel

Full TimeSenior LevelLargeFintech Services

Job Summary

Own the full loop from problem definition through production delivery, architecting AI solutions without hand-held specs. Build with AI as your primary tool to accelerate delivery, co-design decision logic with stakeholders, and construct evaluation harnesses before shipping. Manage production support and monitoring for systems handling real money, maintaining reliability, security, and cost awareness. Report to a Domain Architect while working directly with senior engineering and business leaders on high-impact challenges.

Required Qualifications

  • 7Y+ of Experience shipping production AI systems
  • Understanding of agentic architectures
  • Strong eval instincts
  • Full-stack range
  • Comfortable across any stack
  • Honest communication
  • Understanding of production concerns such as reliability, maintainability, security, observability, latency, and cost
  • Real fluency with AI coding tools
  • Think in workflows, not endpoints
  • Clear judgment about when to trust AI output and when to rewrite it
  • Goes beyond using AI - builds skills, workflows, and harnesses, not just prompts
  • Understanding of common AI-system risks such as hallucinations, prompt injection, data leakage, unreliable tool execution, and uncontrolled autonomy
  • 7Y+ of Experience shipping production AI systems - running them in the real world and fixing what breaks, not just building them
  • Understanding of agentic architectures - orchestration, multi-step workflows, fallback and error logic
  • Strong eval instincts - you define metrics, build test sets, and don't ship until you can measure
  • Full-stack range - comfortable across the prompt, RAG pipeline, orchestrator, and backend
  • Comfortable across any stack - you go where the right solution is
  • Honest communication - you flag problems early and give direct, candid feedback
  • You understand production concerns such as reliability, maintainability, security, observability, latency, and cost
  • Real fluency with AI coding tools - genuinely fast, not just 'familiar with'
  • Think in workflows, not endpoints - agentic loops, skills, and orchestrated flows; CRUD with an LLM bolted on isn't a system
  • Clear judgment about when to trust AI output and when to rewrite it
  • Goes beyond using AI - builds skills, workflows, and harnesses, not just prompts
  • You understand common AI-system risks such as hallucinations, prompt injection, data leakage, unreliable tool execution, and uncontrolled autonomy

Desired Qualifications

  • Fintech or regulated-environment experience - understanding why 'probably fine' isn't acceptable when money is moving

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