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