How MX Scales Product Security Coverage with Prime
"It gives me the ability to scale to support the speed and volume of product and engineering initiatives. When it comes to security architecture, I'm able to conservatively be three to five people with this tool."
Koby Bryan, Product Security Architect
Results with Prime
4×
review throughput
Security coverage across all new product features
The Challenge
As MX’s product surface area grew, so did the demand for security involvement across design reviews, architectural changes, and new feature development. However, the security review engagements were limited by available staffing.
This created several compounding challenges:
- Growing review backlog – The volume of features, design docs, and architectural changes requiring security input began to outpace what one architect could manually review
- Context switching overload – Deep reviews, threat modeling, advisory work, and incident readiness competed for limited time
- Uneven security engagement – Teams with strong security instincts moved faster, while others required more hands-on guidance
- Scaling security ownership – Security could not remain centralized without becoming a bottleneck, but decentralization without guardrails introduced risk
At the same time, MX was intentionally investing in a Security Champions program to embed security knowledge directly into engineering teams. The challenge was ensuring champions could operate consistently, confidently, and in alignment with product security expectations, without overwhelming the architect responsible for governance.
MX needed a way to scale security impact, not just effort.
Working with Prime
As MX’s product velocity increased, it became clear that it needed a trusted, automated force multiplier that could scale security coverage without sacrificing quality, consistency, or governance.
MX adopted Prime Security to operationalize this model.
Prime became the foundation that allowed MX to scale security across a fast-growing fintech product surface and doing so without becoming a bottleneck.
How Prime Addressed the Core Pain Points
1. From Review Backlog to Continuous Security Coverage
Before Prime, security reviews were constrained by human availability. As feature velocity increased, backlog pressure was unavoidable.
With Prime:
- All planned engineering work receives security evaluation, not just what can be manually reviewed
- Coverage automatically scales with development velocity
- Security reviews no longer depend on synchronous architect availability
MX no longer had to choose between depth or breadth, Prime delivered both.
Takeaway: Prime transformed security reviews from a queue into continuous coverage.
2. Consistent, High-Quality Reviews Across Teams
Decentralizing security through champions introduces risk when decisions vary by team or individual.
Prime solved this by acting as a single, consistent source of security analysis:
- Reviews and threat models follow a repeatable, structured format
- Risk analysis is consistent across features, services, and teams
- Security expectations are explicit, not inferred
Champions move faster because guidance is clear, consistent, and trusted.
Takeaway: Prime enabled scale without diluting security standards.
3. Freeing the Architect to Focus on High-Impact Decisions
As a Product Security Architect, the highest value is not repetitive reviews, but:
- Novel architectures
- High-risk design decisions
- Exceptions, governance, and risk acceptance
Prime handles the analysis at scale, allowing the architect to:
- Govern outcomes instead of producing every review
- Focus on the work that truly requires human judgment
- Maintain confidence that nothing critical is missed
Takeaway: Prime shifted security from manual production to strategic oversight.
4. Enabling Security Champions to Move Fast and Safely
Prime became a daily enabler for MX’s Security Champions:
- Champions use Prime-generated reviews and threat models as primary technical input
- Security questions are answered early, in context
- Teams proceed without waiting for manual approval
This reduced friction while raising the overall security bar.
Takeaway: Prime empowered champions to act independently, without acting inconsistently.
Outcomes
With Prime embedded into MX’s product security workflow:
- ~4× increase in effective security review throughput
- Significant reduction in security review backlog
- Consistent security coverage across all new features
- Security Champions operate with confidence and clarity
- Centralized governance is preserved without slowing delivery
Security scaled with product velocity and not behind it.
Looking Ahead
MX plans to expand its use of Prime by:
- Embedding security intelligence earlier in planning and design
- Increasing champion autonomy while maintaining centralized oversight
- Using Prime outputs as contribution to its system of record for security decisions
The strategy is clear: use automation to scale judgment, not replace it; allowing a security team to support a rapidly growing fintech platform with confidence, consistency, and speed.