Chris Arjona

Backend & Platform Engineer

I build the systems behind money movement, compliance decisions, and long-running workflows.

Previously: Square, Yelp
Based in Calgary.

Selected Impact

$1B+ across seven payment rails

One control plane for money movement

Built the risk and exposure control plane now governing more than $1 billion in payment volume across seven rails and nearly 1,000 transacting companies. It supports gradual rollouts, replay-safe actions, dual approvals, reversals, reconciliation, and a complete decision history.

0% to 73% automated in six weeks

Compliance decisions without the queue

Took a deterministic compliance decision engine from an empty repository to its first production decision in three days. Six weeks later, it handled 73% of approvals without human intervention. It has processed roughly 5,000 decisions since launch.

What I Work On

Financial Transaction SystemsRisk & Compliance PlatformsDurable Workflow OrchestrationEvent-Driven InfrastructureOperational Tooling & ObservabilityData & Integration Pipelines

Selected Writing