I build software products and the systems behind them.

Lately I've been focused on AI tools for spreadsheets and finance work: software that can edit a workbook, recalculate it, read back the result, and leave an audit trail. Before that I built logistics, marketplace, security, and infrastructure systems at Truewind, Flexport, Illumio, Okta, Eventbrite, Ticketfly, and Narvar.

• Agents Helm Chart - a Kubernetes-native control plane for running agent and automation work as normal Kubernetes resources.
• Bilig WorkPaper - a TypeScript runtime for editing and recalculating XLSX workbooks from Node.js and agent tools.
• Experimentation Lab - public research code and experiments around agents, infrastructure, Temporal/Bun, Kubernetes, and trading systems.
• gregko.com - writing, project notes, and more context.

• Headless spreadsheets for agents.
• Custom agent harnesses.
• Kubernetes-native agent infrastructure.

• At Flexport, helped modernize marketplace systems while cutting infrastructure cost by 25% and improving p99 latency from 20s to 500ms.
• At Truewind, shipped a WorkPaper Agent that completes real accrual accounting workflows, including fixed assets, prepaid expenses, deferred revenue, and vendor analysis.
• At Illumio and Okta, worked on zero-trust segmentation, cloud security, and vulnerability analysis systems.
• At Eventbrite and Narvar, built fraud, spam, and test automation for operational teams.

• Spreadsheet agents need a transaction log, not a screenshot
• What building Bilig taught me about spreadsheet agents
• Why the Temporal Bun SDK uses Bun and protobufs directly
• Temporal Bun SDK reaches 0.10.0

• I like hard, messy systems.
• I ship from idea to final product.
• I trust empirical results over theory.

TypeScript, Go, Python, Kubernetes, PostgreSQL, Next.js, Node.js, Ruby/Rails, Java/Kotlin/Spring, Terraform, Docker, AWS, GCP, CI/CD, distributed systems, security engineering, and test automation.

• Website: gregko.com
• LinkedIn: linkedin.com/in/gregkonush
• X: x.com/gregkonush