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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 agents, workflow orchestration
Résumé/CV: https://elninja.com/resume
LinkedIn: https://www.linkedin.com/in/elninja
Email: alex [at] elninja.com
GitHub: https://github.com/ibarrajo
Senior backend/platform engineer, 10+ years building distributed systems at scale (Uber, DoorDash). Looking for a hands-on senior/staff IC role — infrastructure, developer platforms, or applied AI systems.At Uber I was Developer Advocate for Cadence, an open-source workflow orchestration engine powering 12B+ workflows/month. Drove adoption across dozens of teams, debugged production issues at scale, and integrated Cadence into Uber's Michelangelo ML platform. Fine-tuned LLMs on internal corpora and built classification systems for developer support triage. Currently building: an autonomous personal operating system with LLM-driven agent orchestration (graph-based scheduling, MCP integrations), an AI-powered job application pipeline, and a consumer AI product. Shipping code daily and looking for a team where that energy is the norm. |