David
Castrillón.
Enterprise Platforms (Salesforce + SAP) · B2B SaaS · AI-augmented design workflow
9+ years architecting solutions on top of complex platforms like Salesforce and SAP, building design systems for global brands, and designing products end-to-end.
Designing where complexity meets users
Salesforce + SAP-integrated SaaS
Designing UI on top of major enterprise platforms — where you don't get to redesign the world, only the workflows that matter inside it. Legacy modernization, design systems, and configurators for B2B teams.
- ·Platform-aware UI design
- ·Legacy modernization without disruption
- ·Design system token architecture
- ·Configurator UX
Founder-led products & B2B SaaS
Building products from spec to working MVP, with AI tools woven into ideation, prototyping, and validation. Cross-surface systems where habit, retention, and trust live in the architecture, not the visuals.
- ·End-to-end product strategy
- ·Spec-driven design
- ·AI-augmented prototyping
- ·Cross-surface systems (web, app, WhatsApp, email)
Three projects that defined how I work today
LifeSafety Power
Legacy Modernization · Design System · Configurator
A full modernization of the legacy MSM platform for an ASSA ABLOY company — used by thousands of integrators across access control installations worldwide.
Read case study →
MasteryTalk PRO
Founder Project · End-to-End Product Ownership
AI-powered communication coach for nearshoring professionals. Built from zero: product strategy, business model, design system, and a working MVP.
Read case study →
DALOG
Industrial IoT · Equipment Health Monitoring
Redesign of the core monitoring UI for a German industrial diagnostics platform — turning dense sensor data from mining and cement operations into decision-ready interfaces.
Read case study →9+ years across enterprise, fintech, and global brands.
Born in Bogotá, based in Medellín. Spent the last decade designing on top of platforms most designers never touch — Salesforce, SAP, legacy enterprise software — while also building consumer-facing products in fintech and retail. The thread across both: clarity beats decoration, especially when stakes are high.
More projects across enterprise, fintech, and retail
Zilliant
Salesforce + SAP-integrated B2B SaaS for pricing strategy at scale.
ViewDigital Banking · National ScaleBancolombia
UX work during the bank's digital transformation across the SuperApp ecosystem.
ViewFintech · BNPL · WhatsApp CommercePagui
B2B/B2C fintech for instant micro-credit via WhatsApp. Shown under NDA.
ViewConversion Optimization · CRORetail & E-commerce
UX-UI and CRO work for Studio F, ELA, Dupree-Azzorti, and Claro Colombia.
ViewA non-linear process, accelerated by AI
Feedback and design decisions, accelerated with AI, validated from day one — taste and judgment still belong to the designer.
Discovery & Alignment
Stakeholder workshops, problem framing, business goal alignment. I often coach PMs to use AI tools to externalize ideas before sessions.
Platform & User Research
Audit of the platform stack + design systems + user research. Defines what's possible vs. what's customizable, upfront.
Concept & AI Prototyping
Direct jump from concept to a working AI-generated prototype. The prototype IS the wireframe — testable from day one.
Validation
Stakeholder reviews + user testing on the AI prototype. Decisions backed by evidence on something people can actually click.
Design System Application
Once direction is validated, the design system is applied — tokens, components, accessibility, polish. The prototype becomes the production-ready design.
Handoff & Design QA
In modern stacks, the AI-built prototype's front end can be the starting point for engineering — handoff is closer to a code review than a spec dump.
Phases 3–5 cycle 2–3 times before going to production. Workshops (Phase 1) revisit at major decision points. AI accelerates phases 3 and 6, but never replaces judgment in phases 1, 2 and 4 — that's where senior design lives.