Justworks

Senior Software Engineer, Applied AI (Mexico City)

Justworks
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21 days ago
Mexico City, MexicoSenior
H1B Sponsor

Responsibilities

  • Design, build, and own the agent platform orchestration layer and internal-system tool integrations.
  • Develop APIs, data access patterns, and service integrations that enable agents to execute operational workflows.
  • Architect knowledge and memory infrastructure for agent retrieval and cross-system actions.
  • Implement trust and safety capabilities including audit trails, human-in-the-loop controls, and guardrails.
  • Build agent evaluation and testing infrastructure for accuracy, reliability, and regression measurement.
  • Partner with Operations to identify automation opportunities and convert process knowledge into agent capabilities.
  • Mentor engineers as the foundational team grows.

Requirements

  • At least five years of backend engineering experience building and operating production systems.
  • Hands-on experience with LLMs and AI agents, including orchestration, retrieval-augmented generation, or tool/function calling.
  • Strong API design and system integration skills.
  • Product-minded approach with the ability to contribute to product decisions and question requirements.
  • Proven ownership of complex projects in ambiguous, early-stage environments.
  • Ability to design, build, and operate production systems with strong backend fundamentals.
  • Curiosity and motivation to develop practical expertise in AI, LLMs, and agent systems.
  • Ability to work pragmatically and autonomously in a fast-paced environment.

Benefits

  • Welcoming, casual, and supportive startup environment.
  • Great benefits and wellness program offerings.
  • Company retreats and opportunities to interact with and learn from startup community leaders.
  • Role based in the Justworks Mexico City office.

Tech Stack

Apache KafkaAWSC#CircleCIDatadogDockerElasticsearchGitGoJavaJavaScriptKubernetesMySQLPythonRedisRuby on RailsTerraform
Justworks

About Justworks

1,001-5,000 employees

Justworks takes the busyness out of growing a business and alleviates the unknown. We’ve combined a simple platform and exceptional 24/7 customer service with the power of a PEO, so all teams have more time to focus on what matters. Get access to corporate-level benefits, seamless payroll, HR tools, and compliance support—all in one place.

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