Resume

David Winiarski

Staff Site Reliability Engineer · Calgary, AB

Summary of Qualifications

Staff SRE with 10+ years of experience in infrastructure, platform engineering, and reliability
Technical leader who drives cross-team initiatives in observability, security, and infrastructure standardization
Proven track record of designing high-performance systems and reducing operational complexity
Strong background in mentoring engineers and establishing SRE practices across organizations
Extensive experience with Go, Python, Terraform, AWS, Kubernetes, OpenTelemetry, and Envoy
Combines software development expertise with deep infrastructure and systems knowledge

BSc, Economics · University of Victoria

Zapier

March 2025 – Present

Designed and implemented high-performance authz service for Envoy Gateway that extracts JWT values and injects them as headers upstream, enabling account-level visibility during incidents with p95 latency under 1ms
Led cross-team initiative to standardize observability on OpenTelemetry, providing default observability for all services
Consolidated telemetry tooling onto Alloy, reducing operational complexity and tool sprawl across the organization
Led company-wide SLA initiative, reducing implementation overhead for underlying data and collaborating with stakeholders to define calculation methodology, directly enabling higher-tier enterprise contracts
Mentored engineers, led SRE practices across teams, and contributed to hiring processes

Zapier

Aug 2023 – March 2025

Led Kubernetes standardization initiative to leverage EKS capabilities and reduce cluster count, cutting upgrade time from multiple weeks with multiple engineers to one week with a single engineer
Drove Karpenter adoption to replace standard ASGs, significantly reducing cost per task execution and enabling teams to leverage Graviton instances
Designed centralized authentication solution for internal applications, effectively eliminating internal support requests for access grants
Migrated legacy systems from EC2 to Kubernetes

Zapier

Sept 2021 – Aug 2023

Reduced centralized logging costs by 40% by leading migration from elastic.co to OpenSearch
Designed and implemented failover mechanisms for critical traffic

Replicon

Nov 2017 – Sept 2021

Managed multi-region EC2 clusters with Terraform to support customer needs worldwide
Deployed organization-wide metrics system
Improved CI and CD system to reduce overall deployment time
Assisted in an organization-wide security audit and remediation effort to satisfy FedRAMP compliance
Designed and implemented load testing system
Designed and developed an automated recovery system
Implemented a standardized edge proxy for use by both legacy and new systems
Managed diverse AWS infrastructure including Linux and Windows EC2, ECS, Elastic Beanstalk, and DynamoDB
Led migration to Aurora RDS Postgres to improve resilience, including needs assessment and cost forecasting against existing RDS usage
Optimized Postgres queries for large enterprise customers by eliminating full table scans, reducing query times from 30 seconds to under 1 second

Go2mobi

May 2015 – Nov 2017

Developed data pipelines that process multiple terabytes per day
Developed dynamic Docker-based systems to execute Spark jobs
Planned and deployed multiple Kubernetes clusters across bare metal, AWS, and GCE
Migrated legacy projects into Kubernetes