Senior Software Engineer, Applied AI (Netherlands)

JustworksNetherlandsHybridFull-time15 Sept 2026

Justworks is seeking a Senior Software Engineer, Applied AI in the Netherlands to join a small, highly autonomous team building an AI agent platform that transforms operations at scale. The role involves designing and owning core components of the agent platform, including orchestration, tool integrations, knowledge infrastructure, and trust and safety frameworks. The ideal candidate has 5+ years of backend engineering experience, hands-on experience with LLMs and AI agents, and a product-minded, ownership-driven approach.

What you'll do

Design, build, and own core components of the agent platform, from the orchestration layer to the tool integrations connecting it to internal systems.
Build and evolve the capabilities layer: APIs, data access patterns, and service integrations for agents to execute operational workflows.
Architect the knowledge and memory infrastructure, allowing agents to retrieve the data and act across our systems.
Design and implement the trust and safety framework, including audit trails, human-in-the-loop controls, and guardrails for safe and auditable AI-driven operations.
Contribute to agent evaluation and testing infrastructure, defining how we measure accuracy, reliability, and regression across agent behaviors.
Partner directly with Operations to understand workflows, identify automation opportunities, and translate process knowledge into agent capabilities.
Mentor other engineers on the team as it grows.

What you need

Must-have

GoRuby on RailsJavaScriptJavaC#PythonVue.jsMySQL

Soft skills

self-drivencuriousownership mindsetproduct-mindedpragmaticresourcefulproactivementoring

Senior Software EngineerApplied AIAI agentsLLMbackend engineeringHuman Resources ServicesHybridNetherlandsFull-time

/What you'll do

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Must-have

Soft skills

What you'll do

What you need