2 months ago
Remote, SpainSenior
Responsibilities
- Design, build, and own core agent-platform components, including orchestration and internal-system tool integrations.
- Build APIs, data-access patterns, and service integrations that enable agents to execute operational workflows.
- Architect knowledge and memory infrastructure for retrieval and cross-system action.
- Implement trust and safety capabilities including audit trails, human-in-the-loop controls, and guardrails.
- Develop agent evaluation and testing infrastructure to measure accuracy, reliability, and regressions.
- Partner with Operations to identify automation opportunities and translate workflows into agent capabilities.
- Mentor engineers as the team grows.
Requirements
- 5+ years of backend engineering experience building and operating production systems.
- Hands-on experience with LLMs and AI agents, including orchestration, RAG, or tool/function calling.
- Strong API design and system integration skills.
- Ability to contribute product thinking and question requirements, not just execute them.
- Proven ownership of complex projects in ambiguous, early-stage environments.
- Strong backend engineering fundamentals and ability to design, build, and operate production systems.
- Curiosity and motivation to develop practical expertise in AI, LLMs, and agent systems.
- Pragmatic, resourceful, product-minded, and ownership-oriented approach.
Benefits
- Great benefits and wellness program offerings.
- Company retreats and opportunities to interact with and learn from startup-community leaders.
- Hybrid work arrangement, as indicated in the posting.
Tech Stack
Apache KafkaAWSC#CircleCIDatadogDockerElasticsearchGitGoJavaJavaScriptKubernetesMySQLPythonRedisRuby on RailsTerraformVue.js
Categories
About Justworks
Justworks provides a PEO and SaaS platform for small and midsize businesses to run payroll, offer benefits, and manage HR and compliance. Products include access to health insurance and 401(k), payroll and contractor payments, onboarding tools, and reporting, sold via subscriptions and PEO service fees. Founded in 2012 and headquartered in New York City, the company is privately held and serves employers across the United States.