Dev agencies without a design layer hit a ceiling fast. The contracts get bigger, the interfaces get more complex, and the gap between engineering quality and presentation quality gets harder to hide. At 20-25 projects, inconsistent design is survivable. Past that, it's the reason you lose the next deal.
Performant could build anything. React, Next.js, Swift, Kotlin, Python. The technical stack was deep, the team was global, and client projects shipped functional but visually inconsistent. Interfaces looked different project to project. No style system. No design thinking connecting UX decisions to business outcomes.
When a healthcare client needed a subscription platform or a publishing house needed a research portal, the code was solid. The design was an afterthought. The work was getting more complex, the clients were getting bigger, and Performant needed more than a designer. They needed a design partner who could own the entire layer.
Seifio embedded as Performant's long-term design partner. Not project-by-project freelancing. A three-year engagement owning design across every client, every vertical, every deliverable. Each project got its own style guide, interface system, and conversion logic tailored to the vertical. One design layer running across an agency scaling from 25 to 90+ projects.
A health-tech subscription platform doesn't look like a research publishing portal. Neither looks like a logistics returns system. Seifio built bespoke systems for each while keeping production speed consistent across the full roster.
Proof built into every project. Bentham Science: +40% page views, +30% research downloads, 35% reduction in admin work. Cactus: +35% subscription retention, +40% sign-up completion. Every interface designed around conversion. Every result traceable to a design decision.
Then the methodology became a product. Four years of cross-industry patterns, templates, and conversion logic fed into StoreReady an AI-powered production system. Persona-based onboarding, industry-specific design templates, automated deployment. The process that worked across 90+ client projects, compressed into a repeatable system.
Three years. One design partner. An agency that went from outsourcing design project by project to making it the reason clients signed.
The numbers sit on Performant's own case study pages. Measurable client results across healthcare, publishing, fintech, and SaaS, all delivered under one design partnership that never missed a deadline. Design systems that scaled across verticals without losing quality or production speed.
StoreReady launched off the back of it. The design methodology productised into an AI-powered system 50+ projects deployed, 4.8/5 Trustpilot from 427 reviews. The design layer held as the agency scaled. Then it became a product of its own.
