Careers

Operations ML Engineer

EngineeringRemote

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About the team

Legitmark is building the trust layer for resale. We believe that authentication should be fast, accurate, and accessible to everyone, from individual sellers to the world's largest marketplaces. Our team of experts and engineers authenticate millions of items annually, helping buyers shop with confidence and sellers maximize value.

About the role

As an AI/ML Engineer on our Operations team, you'll build intelligent automation that makes our operations dramatically more efficient. This role sits at the intersection of machine learning, computer vision, and workflow orchestration. You'll identify bottlenecks, automate repetitive decisions, and build systems that route work to the right people at the right time. This is a greenfield opportunity. You'll design and build our operations AI infrastructure from the ground up, working closely with the team that processes items daily. The goal is to dramatically reduce manual work: automating image quality checks, pre-filling forms with high-confidence predictions, intelligently assigning tasks, and flagging exceptions before they become problems. This is a high-ownership role. We're a small team moving fast, which means you'll take projects from idea to production with minimal handoffs. You'll work directly with the founding team and have real input into what we build, not just how. We expect you to leverage modern AI-assisted development tools to ship quickly and maintain high quality. This role is remote-first with flexible hours. We work asynchronously across time zones and value output over presence.

In this role, you'll:

  • Own the full lifecycle: from prototyping with operations to deploying and monitoring in production
  • Design ML pipelines for image analysis, classification, and intelligent task routing
  • Build orchestration systems that coordinate multi-step workflows with confidence thresholds and human escalation paths
  • Create feedback loops that capture operator corrections and continuously improve predictions
  • Set up evaluation frameworks so we actually know when automation is working
  • Partner directly with operations to find the highest-leverage automation opportunities

How we work

We're an AI-native engineering team. We use Cursor with Claude as our primary development tools and expect engineers to be proficient with AI-assisted workflows. That includes debugging, code generation, refactoring, and rapid prototyping. If you're still writing every line manually, this probably isn't the right fit. This doesn't mean we want prompt-and-pray engineers. You need deep technical fundamentals to know when the AI is wrong, architect systems correctly, and debug complex production issues. AI tools make good engineers faster; they don't replace engineering judgment. We're pragmatic about ML. We reach for foundation models and APIs before training custom models, optimize for time-to-value, and only build complex systems when simpler approaches fail. You should have strong opinions about when to fine-tune vs. prompt engineer vs. build from scratch.

We're looking for someone with:

  • 3-5 years of experience building and deploying ML systems in production
  • Strong Python fundamentals and hands-on experience with ML frameworks
  • Experience with computer vision tasks (image quality, classification, object detection)
  • Familiarity with LLM APIs (OpenAI, Anthropic, Google) and prompt engineering
  • Ability to design systems with confidence scoring, thresholds, and graceful human fallback
  • Strong communication skills and ability to work asynchronously
  • Comfort with ambiguity and a bias toward shipping

Nice to have:

  • Experience with agentic AI patterns and orchestration frameworks (LangChain, LangGraph, CrewAI, or similar)
  • Background building human-in-the-loop systems where operator feedback improves the model
  • Familiarity with workflow engines (Conductor, Temporal, Prefect)
  • Experience automating operations in logistics, fulfillment, or high-volume processing environments

You might thrive in this role if:

  • You're a builder. You enjoy taking problems from zero to one and iterating quickly based on feedback.
  • You're AI-native. You've internalized AI tools into your workflow and can't imagine going back.
  • You're operations-curious. You want to deeply understand our workflows, not just build generic ML systems.
  • You think in systems. You design for failure modes, edge cases, and the humans who will work alongside your automation.
  • You ship. You'd rather get something in front of users and iterate than spend months perfecting it in isolation.