WeTransfer
Product experience
Maximiliano Céspedes
Senior product engineer
12+ years of experience
Building smarter product systems for the AI era.
I help teams turn ambiguous product problems into polished, reliable interfaces.
Coolblue
Commerce platform
Creative Fabrica
Creator tools
Stepcraft
Founded product
m4x
Indie lab
Product engineering for ambitious teams
From idea to shipped product.
Performance and observability
Faster, clearer, easier to trust.
Frontend architecture and modernization
Cleaner systems for faster teams.
AI / product advisory
Useful AI, with judgment.
Design systems and UI foundations
Shared foundations that raise quality.
Strategy when needed. Code when it matters.
UI Patterns for Agent-Driven Products
Less clutter, more clarity.
Read articleVibe Coding Is Here to Stay, But It Needs Guardrails
AI work needs smaller boundaries.
Read articleStaying Sane When AI Agents Keep Changing Your Workflow
How to keep the tool useful.
Read articleFrontend Interviews Should Measure Judgment, Not Memory
Senior work is not typing speed.
Read articleI'm Maximiliano Céspedes, senior frontend / product engineer, founder-minded builder, and advisor.
I care about craft, systems thinking, product judgment and interfaces that feel trustworthy.
- NEXT.JS / REACT
- PRODUCT ENGINEERING
- FRONTEND ARCHITECTURE
- DESIGN SYSTEMS
- PERFORMANCE
- OBSERVABILITY
- EXPERIMENTATION
- AI & PRODUCT ADVISORY
Let's build something that matters.
If you need product-minded frontend help, I would like to hear what you are building.