Ionel Roiban

Case studies

Outcomes, measured in production

Every engagement here shipped, ran, and got measured. Uptime, page loads, open rates, cost — numbers from live systems, not projections.

The record

Results you can audit

A deliverable without a number attached is a promise with confidence theater.

Fig. 02 — delivery diagram20 years of engagements
delivered = scoped is the diagonalmeasured on live systems
99.99%
Uptime, multi-region AWS
<2s
Page loads, from 8+s
31%
Email open rates
~40%
Infra cost reduction

When I say a system will hold four nines, it holds four nines. That is the whole product.

Track record

From the ledger

EngagementDomainMeasureResult
Multi-region AWS migration (PCI)CloudUptime99.99% · US-East / US-West
Same migrationCloudInfrastructure cost~40% reduction
Same migrationComplianceSOC II supportReal-time visibility + audit trails
Digital transformation (The Weiss Group)WebPage loads8+s → <2s (CloudFront CDN)
Same transformationEngineeringPipelinesAutomated testing, code review, deploys
Email infrastructure rebuildDeliverabilityOpen ratecrisis 28%→12% fixed → 31% · 4.2% CTR
Pharmaceutical B2B platform (RX Automation)ComplianceControlled-substance ordersFull audit trails (HIPAA-relevant)
NBA streaming app (Roku)MediaPerformanceProduction performance monitoring
Retention analytics platformDataVisibilityLooker / Tableau / Grafana + automated alerts
Deployment architectureOpsRelease safetyBlue-green deploys with DNS failover

Every row is a real engagement. References and fuller write-ups available on request — [email protected].

Selected stories

Three engagements, end to end

Cloud · PCI

The migration that couldn’t blink

As Senior Software Engineer at PCI, I moved production to multi-region AWS across US-East and US-West — 99.99% uptime through the cutover, real-time visibility and audit trails built in for SOC II, and roughly 40% off the infrastructure bill.

Web · The Weiss Group

Eight seconds to under two

As Application Development Manager, I led a digital transformation that took page loads from 8+ seconds to under 2 with a CloudFront CDN — and left behind automated testing, code review, and deploy pipelines so it stayed fast.

Email · deliverability

The 12% inbox problem

A deliverability crisis had dropped open rates from 28% to 12%. Self-hosted Mautic with automated IP warming brought the list back: 31% open rates and 4.2% click-through — on infrastructure the business owns.

Live practice

The agent fleet that runs my own shop

Not client work — my own operation, run daily as an agent fleet. It is the standing test bed for everything on the services page.

20+ agent sessions

Claude agent sessions across project folders — this site, AWS infrastructure, campaign tooling, quant research — each registered in a session registry, opened and closed by playbook-driven rituals.

One shared memory

A mem0 memory service every agent reads and writes — on the order of 150 durable facts per project namespace — so session 21 starts where session 20 stopped.

Agent-to-agent dispatch

Per-project dispatch channels: agents leave work for each other in mailbox files, and a hub session routes anything that crosses project lines.

Self-verifying writes

Every durable write goes through tooling that rewrites, fsyncs, and re-reads the file byte-for-byte before it counts. Agents that write files need the same guardrails as agents that move money.

Own-ops practice, labeled as such — shown here because it is the one agentic system I can demo end to end without an NDA.

Methodology

How the numbers get made

Instrumented from day one

Monitoring and analytics go in with the first deploy. If it isn’t measured, it didn’t happen — and it can’t be defended later.

Business metrics, not vanity

Uptime, page loads, open rates, cost. Quality is monitored through architecture, testing, and analytics — and forecasts get graded on calibration, not on how confident they sounded.

No cherry-picking

The figures above are the production numbers, crises included — the 12% open rate is on this page next to the 31%.

Have a system that should exist but doesn’t?

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