by ibarrajo 10 hours ago

  Location: Seattle, WA
  Remote: Yes
  Willing to relocate: Yes (SF, NYC for the right role)
  Technologies: Go, Python, Kotlin, TypeScript | Cadence/Temporal, Kubernetes, Kafka, Postgres, Redis | GCP, AWS | LLM integrations, workflow orchestration
  Résumé/CV: https://elninja.com/resume
  LinkedIn: https://www.linkedin.com/in/elninja
  GitHub: https://github.com/ibarrajo
  Email: alex [at] elninja.com
Senior backend/platform engineer with 10+ years building distributed systems at scale (Uber, DoorDash). Looking for a hands-on IC role on a strong team — infrastructure, developer platforms, or applied AI systems.

Most recently at Uber as Developer Advocate for Cadence, an open-source workflow orchestration engine powering 12B+ workflows/month. Partnered with engineering teams across the org to drive adoption, debug production issues, and scale fault-tolerant pipelines — including integration with Uber's Michelangelo ML platform. Fine-tuned LLMs on internal corpora and built classification systems for developer support triage.

Since then I've been building: a self-orchestrating workflow engine with LLM-driven agents, AI-powered job automation pipelines, and a couple of side projects — El Minarete (https://elminarete.com), a Lotería card game generator, and Lomito (https://lomito.org), a civic platform for animal welfare in Mexico. Recently pitched Pursuit at the Venture Mechanics' AI Scalathon — an agent-to-agent recruiting platform where AI interviews AI to match candidates to roles.

Previously: Kotlin microservices migration and refund rules engine at DoorDash. NLP resume-matching pipelines at Jobscan. Founded a healthtech startup (CTO).

Interested in: infrastructure, developer tooling, workflow orchestration, applied ML/AI — especially in healthcare, logistics, finance, or defense. I want to build systems that matter with people who care about craft.