# Case Studies | Def Method

> How we've helped teams modernize high-risk Rails systems without triggering outages, audit issues, or revenue loss.

## Case Studies

Modernizing systems that couldn't afford to break

These are examples of modernizing revenue-critical, regulated, or operationally sensitive systems — where failure would have meant outages, audit findings, or lost trust.

Every engineering organization begins in a different place, but the underlying challenges are remarkably consistent: preserving understanding, modernizing safely, and reducing the operational risk that accumulates over years of growth. These projects illustrate how we've helped organizations solve those problems long before AI made them impossible to ignore.

### High-risk systems we modernized without disruption

![building-a-derivative-pricing-platform-at-citi](https://www.defmethod.com/assets/case_studies/building-a-derivative-pricing-platform-at-citi-1-b4241023e2ed106ac50956561b5a26c5f4188e1f6829e332efbf21b0d55f6967.webp)

Financial Services

### [Modernizing a High-Risk Derivatives Pricing Platform at Citi](https://www.defmethod.com/case-studies/building-a-derivative-pricing-platform-at-citi)

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

![streamlining-compliance-at-paxos](https://www.defmethod.com/assets/case_studies/streamlining-compliance-at-paxos-1-b112c6f5ca523ea3205e42afdeeffef09d174462aca7f359693213114b3aa412.webp)

Financial Services

### [Modernizing High-Risk Compliance Infrastructure at Paxos](https://www.defmethod.com/case-studies/streamlining-compliance-at-paxos)

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

![unlocking-scale-by-revamping-data-systems-at-orum](https://www.defmethod.com/assets/case_studies/unlocking-scale-by-revamping-data-systems-at-orum-1-015e5833325416c3febf56159208a9d8f6cc5882bdbd34c10f46570e6d3ecfa2.webp)

Financial Services

### [Modernizing High-Risk Revenue and Reporting Systems at Orum](https://www.defmethod.com/case-studies/unlocking-scale-by-revamping-data-systems-at-orum)

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

![center-for-nyc-neighborhoods-floodhelpny](https://www.defmethod.com/assets/case_studies/center-for-nyc-neighborhoods-floodhelpny-1-29e879ccd6e0681684d43119581ced6ca3210e1b629ca3e348442f76a03f88db.webp)

Nonprofit

### [Modernizing a High-Risk Public-Facing Assistance Platform for FloodHelpNY](https://www.defmethod.com/case-studies/center-for-nyc-neighborhoods-floodhelpny)

De-risking a mission-critical system where outages would block aid, disrupt operations, and undermine public trust.

### Other systems we've modernized

![designing-customer-portal-with-salesforce](https://www.defmethod.com/assets/case_studies/designing-customer-portal-with-salesforce-1-3ae69cfc4e886c2d71122b51b1e84206020b71aae708680f850149c9282cff1c.webp)

Technology

### [Modernizing a High-Risk Customer Portal Integrated with Salesforce](https://www.defmethod.com/case-studies/designing-customer-portal-with-salesforce)

De-risking customer-facing workflows where failures would disrupt revenue operations and customer trust.

![elias-sports-bureau-game-plan](https://www.defmethod.com/assets/case_studies/elias-sports-bureau-game-plan-1-ecf648b02eb61addaa18ba47aed8928c0e607dc2d74d2376f304f22491d5099b.webp)

Sports & Media

### [Modernizing a High-Risk Sports Data Platform at Elias Sports Bureau](https://www.defmethod.com/case-studies/elias-sports-bureau-game-plan)

De-risking a mission-critical Rails system where failures would disrupt customers, contracts, and live sports operations.

![elias-sports-bureau-graphics-library](https://www.defmethod.com/assets/case_studies/elias-sports-bureau-graphics-library-1-490ea5b417da0577866ff1882897b9daea2b3059fda92618fdf115516e0893a1.webp)

Sports & Media

### [Modernizing a High-Risk Media Asset Platform at Elias Sports Bureau](https://www.defmethod.com/case-studies/elias-sports-bureau-graphics-library)

De-risking a revenue-critical Rails system where failures would disrupt customers, contracts, and live production workflows.

![identifying-product-gaps-to-improve-retention](https://www.defmethod.com/assets/case_studies/identifying-product-gaps-to-improve-retention-1-27a285b7b51fccb48afa9e71fd2a7930813bb59ac899a03220a2ff4164073abe.webp)

Technology

### [Modernizing a High-Risk Customer Platform to Reduce Retention Risk](https://www.defmethod.com/case-studies/identifying-product-gaps-to-improve-retention)

De-risking core Rails workflows where failures would impact customer trust, renewals, and long-term revenue.

![leading-social-media-company](https://www.defmethod.com/assets/case_studies/leading-social-media-company-1-bceadc30491c7f2b41c0c17b5b62dd4551e19625e10d0990df1d8897d8c03317.webp)

Technology

### [Modernizing High-Risk Revenue Infrastructure for a Leading Social Media Company](https://www.defmethod.com/case-studies/leading-social-media-company)

De-risking a large-scale Rails system where failures would impact revenue, customer trust, and live operations.

![luxury-retail-brand](https://www.defmethod.com/assets/case_studies/luxury-retail-brand-1-d4bb34589e93a0f375382e686057e88ededc3d65f2902699964f95c4f1497902.webp)

Retail

### [Modernizing a High-Risk E-Commerce Platform for a Luxury Retail Brand](https://www.defmethod.com/case-studies/luxury-retail-brand)

De-risking a revenue-critical Rails system where failures would impact customer trust, brand reputation, and sales.

Different industries. Different systems. Same constraint: these were all environments where getting it wrong had real consequences. That's the work we specialize in.