> We modernize Rails systems when breaking things is expensive. Assessment-first approach for reliability, compliance, and revenue-critical applications.

# We modernize Rails systems when breaking things is expensive

For high-risk systems where failure means outages, audit findings, or lost revenue — we make change safe.

[Start with an Assessment](https://www.defmethod.com/assessment)
[See how we work](https://www.defmethod.com/services)

![Walmart](https://www.defmethod.com/assets/walmart-monochrome.png-563d81033b840f2b04de527fcb4ac984dfed6050cdc462a7371265e096219ed5.webp)
![Dick's Sporting Goods](https://www.defmethod.com/assets/dsg-monochrome.png-8f927f49d989cb60ac461f34b026140eee7cf979308b179046381957c19dc14e.webp)
![Citibank](https://www.defmethod.com/assets/citibank-monochrome.png-f152b00958a1b9e44b739a90a7b2397500721d8574eb3c7ca8b4ab0f5eef9bd9.webp)
![MoMA](https://www.defmethod.com/assets/moma-monochrome.png-23fd5bf0ab2925ebac5ed968348c599f3bfdb3628e29f2aa4c3f8e56acc08cde.webp)

Repeat clients
80%

Hours spent on client projects
150k+

Average years of experience per employee
10.5

> Thorough. That's the one word I'd boil it down to. They analyze and account for different outcomes, opportunities, and risks.

![Roxanne O'Driscoll](https://www.defmethod.com/assets/roxanne_o-2f92fed39d7be2645e2b6f63293e63a3483c0644e6b2409f3a92e4da1f116eb3.jpg)

Roxanne O'Driscoll
Director of Product Management, GameChanger

## Start with clarity, not code.

Most modernization failures happen because teams start changing code before understanding where change is safe — especially around data, security, and core workflows. Our assessment gives you that map.

System risk map
Where change is dangerous today — and why.

Test confidence evaluation
What your coverage actually covers — and where it doesn't.

Modernization pathways
What to tackle now, what to defer, and what to avoid.

[Learn about the Assessment](https://www.defmethod.com/assessment)

## Systems that couldn't afford to fail.

And didn't.

Financial Services

### Modernizing High-Risk Revenue and Reporting Systems at Orum

De-risking core data workflows where failures would stall growth, disrupt customers, and erode trust.

[Read more →](https://www.defmethod.com/case-studies/unlocking-scale-by-revamping-data-systems-at-orum)

Financial Services

### Modernizing High-Risk Compliance Infrastructure at Paxos

De-risking regulated financial workflows where failures could trigger audit findings, settlement delays, or financial exposure.

[Read more →](https://www.defmethod.com/case-studies/streamlining-compliance-at-paxos)

Financial Services

### Modernizing a High-Risk Derivatives Pricing Platform at Citi

De-risking critical pricing workflows where failure could mean revenue loss, regulatory exposure, or trading disruption.

[Read more →](https://www.defmethod.com/case-studies/building-a-derivative-pricing-platform-at-citi)

[See all case studies](https://www.defmethod.com/case-studies)

![](https://www.defmethod.com/assets/skyline-dccc39b4643b24f2ae5e78c2834d53d00f9c28efbf0ae8461652e0624766fb23.webp)

![Walmart](https://www.defmethod.com/assets/walmart-monochrome.png-563d81033b840f2b04de527fcb4ac984dfed6050cdc462a7371265e096219ed5.webp)

![Dick's Sporting Goods](https://www.defmethod.com/assets/dsg-monochrome.png-8f927f49d989cb60ac461f34b026140eee7cf979308b179046381957c19dc14e.webp)

![Citibank](https://www.defmethod.com/assets/citibank-monochrome.png-f152b00958a1b9e44b739a90a7b2397500721d8574eb3c7ca8b4ab0f5eef9bd9.webp)

![MoMA](https://www.defmethod.com/assets/moma-monochrome.png-23fd5bf0ab2925ebac5ed968348c599f3bfdb3628e29f2aa4c3f8e56acc08cde.webp)

Ready to modernize without the risk?

[Start with an Assessment](https://www.defmethod.com/assessment)