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César Andrés Lizárraga

Senior/Staff Infrastructure Engineer | Software Architect
St. Louis, MO | calizarr@gmail.com
github: http://github.com/calizarr
LinkedIn: http://linkedin.com/in/calizarr

Professional Summary

Strategic and hands-on Senior Infrastructure Engineer with over 15 years of experience in cloud-native architecture, Kubernetes orchestration, and large-scale software development. Proven expertise in leading cross-functional teams to deliver high-availability systems, including architecting platforms that secured multimillion-dollar contracts. Adept at bridging the gap between low-level hardware (IoT/Embedded) and high-level cloud infrastructure to drive innovation and operational excellence.

Technical Skills

  • Infrastructure & DevOps: Kubernetes (K8s), ArgoCD, Argo Workflows, OpenTofu/Terraform, Ansible, Cilium eBPF, Talos Linux, Proxmox, Bare-metal.
  • Languages & Frameworks: Golang (Learned on the job), Python (Django, FastAPI), Scala (Learned on the job), BASH, SQL, Java.
  • Cloud Platforms: AWS (EC2, S3, DynamoDB, IAM, Route53, GuardDuty, WAF), DigitalOcean.
  • Databases & Data Platforms: PostgreSQL, AWS RDS, SQLite, DynamoDB, Ray, MLFlow.
  • Observability & Reliability: Prometheus, Grafana, Linkerd, ELK Stack, Incident Response, Postmortem Leadership, PiHole/Unbound.
  • Security & Compliance: AWS WAF, AWS GuardDuty, SSL/TLS Encryption-in-transit, OSS Review Toolkit (ORT), SOC2 Compliance, Dependency Vulnerability Remediation.
  • Hardware & IoT: Raspberry Pi (4b, Pico 2W), Arduino, Logic Analyzers, I2C/SPI/UART troubleshooting, field canopy sensors, SMD harvesting/organization
  • Developer Tools: Git, Tekton, Jenkins, Travis CI, GNU Emacs, IntelliJ IDEA.

Relevant Experience

CIBO Technologies | St. Louis, MO

Senior Software Engineer (Infrastructure) | March 2021 – October 31, 2025

  • Architected and standardized core infrastructure for API-driven microservices backed by PostgreSQL, increasing platform reliability, reducing disaster recovery RTO through high-availability guardrails, and optimizing developer self-service.
  • Developed custom Kubernetes Admission Webhooks in Golang to automate complex lifecycle operations, reducing manual configuration errors by approximately 75%.
  • Led SOC2 Compliance and AWS Architecture reviews, ensuring enterprise-grade security and hardening the security posture of public-facing domains.
  • Orchestrated full-stack vulnerability remediation using the OSS Review Toolkit (ORT), navigating complex dependency trees in Scala and TypeScript to resolve critical security flaws while implementing "fuzzy pinning" strategies to prevent future regressions.
  • Scaled R&D capabilities by deploying Ray and MLFlow clusters, approximately accelerating model training times by 30% and deployment times by 50% for the Data Science and Computer Vision teams as well as reducing our budget by eliminating unused, existing EC2 instances with GPUs.
  • Contributed to upstream open-source projects to resolve critical bugs, eliminating the long-term maintenance overhead of internal private forks.

Interim Lead of Infrastructure | April 2020 – March 2021

  • Directed strategic roadmap development for a growing 4-person infrastructure team, aligning technical debt reduction with 12-month business milestones.
  • Managed cross-departmental security coordination and mentored junior engineers, improving team velocity by approximately 50% during a critical leadership transition.

Engagement Engineering Lead (Project Lead) | July 2017 – April 2020

  • Architected a custom distributed application suite that secured a multimillion-dollar partnership, utilizing PostgreSQL for complex data modeling and schema design.
  • Optimized client research workflows by eliminating structural bottlenecks using high-level product and architectural design, reducing scientist workflow time from months to days and data processing time from weeks to hours.
  • Engineered scalable microservices in Scala and Python, successfully supporting 100+ concurrent users running c omputational and data intensive workflows from prototype through global deployment.

Nanaya | St. Louis, MO

Co-founder / Infrastructure & Software Engineer | July 2014 – Present

  • Managed technical operations for a global platform with 300,000+ users, ensuring 99.9% uptime through proactive PostgreSQL query optimization while facilitating communication between developers and R&D teams.
  • Migrated legacy infrastructure to a container-based model, which reduced deployment overhead by 50% and significantly improved developer iteration speed.
  • Refined production-level algorithms and data pipelines, improving algorithm speed by 60% and accuracy by 20% for the core application.

Donald Danforth Plant Science Center | St. Louis, MO

Senior Computational Scientist | December 2014 – July 2017

  • Developed and commercialized PheNode, a field canopy sensor system (Arduino/Raspberry Pi) utilizing distributed Linux systems for automated data collection.
  • Automated high-throughput image capture across 180 Raspberry Pis using Ansible, creating dense 3D reconstructions with sub-centimeter accuracy ($+/-0.5cm$).
  • Coordinated data analytics for global research labs, optimizing computational resource allocation for high-throughput sequencing and imaging pipelines.

Technical Projects

Alvoiarko Homelab (Advanced K8s & Networking)

  • Maintains a 4-node bare-metal Kubernetes cluster (Talos/Proxmox) to test production-grade deployments using Cilium eBPF and OpenTofu.
  • Operates critical services like Reconya and ConvertX, utilizing a full CI/CD lifecycle via ArgoCD and Tekton.

PhenoPiSight (IoT/Computer Vision)

  • Developed a distributed greenhouse phenotyping platform that streamlined the image transfer and 3D reconstruction pipeline for high-throughput analysis.

Education & Languages

  • B.A. Mathematics (Probability and Statistics) | Washington University in St. Louis
  • Languages: English (Fluent), Spanish (Fluent), Italian (Intermediate).

Publications Available Upon Request