Built for repetition
I care about systems that work reliably over time, not only when conditions are controlled.
José “Javi” Asilis
Building products. Studying systems. Sharing what survives contact with reality.
I’m a technical founder and systems builder. I investigate how products and mechanisms succeed or fail, then share the experiments, tradeoffs, and principles I find.
FRICTION 01
BUILD
OBSERVE
REFINE
OBSERVE
REFINE
EVIDENCE 02
One loop, many domains.
Recurring lenses
The subjects move. The questions remain.
These are not permanent niches. They are different places to ask the same questions: why does this work, where does it break, and can the mechanism be made more elegant?
01
Building products
↘02
Systems & leverage
↘03
Software & AI
↘04
Entrepreneurship
↘05
Product judgment
↘06
Learning in public
↘How I think
A few operating principles
Not commandments. Working models, revised by evidence.
Mechanisms over spectacle
I look for small, well-placed constraints that create effects much larger than their surface area.
Speed with feedback
Velocity matters when it shortens the loop between intention, evidence, and a better decision.
Friction is evidence
Resistance in a workflow is information about assumptions the system got wrong.
Experiments before certainty
A useful test beats a confident opinion—especially when the environment is changing.
Lower the cognitive tax
Good products make the right next action easier to see, not merely technically possible.
The working process
Thinking is downstream of doing.
The public work is not a separate content machine. It is the residue of noticing, testing, and building in the real world.
- 1Notice a friction
- 2Ask a question
- 3Run an experiment
- 4Observe the outcome
- 5Extract a principle
- 6Build or publish
Current experiments
Work in motion
A changing set of products and investigations. The projects evolve; the pursuit of useful, legible systems does not.
EXP / 01
Operating & evolving
Pana
A financial operating system designed to make complex money movement feel legible and dependable.
How trust is built through predictable behavior, clear state, and careful handling of edge cases.EXP / 02
Active experiment
Reliable personal systems
Experiments in LLM-assisted memory and personal operations that remain useful after the first week.
Where automation reduces cognitive load—and where it quietly creates a new maintenance burden.EXP / 03
Field study
The mobile workbench
A practical computing setup for doing meaningful technical work inside fragmented, mobile days.
Resumability and low setup cost matter more than maximal capability when attention is the scarce resource.Selected writing
Notes from the workbench
Essays, observations, frictions, and building notes—long enough to make the idea useful, no longer than it needs to be.
PrinciplesBuilding notes
Reliability is a feature, not a finish line
Impressive demos are easy to remember. Repeated, uneventful use is the harder—and more valuable—test.
ExperimentsPersonal operations
A workstation that fits around a toddler
Mobile computing becomes a systems problem when the constraint is not power, but fragmented attention.
FascinationsSystems
The small mechanism inside a checksum
One extra digit can catch an extraordinary range of human errors. Elegant leverage often looks almost trivial.
Personal context
A life spread across systems.
I’m Dominican, live in Spain, and have spent years founding and building software companies—including several inside financial systems. Fatherhood has made the hidden architecture of daily life much harder to ignore. Across all of it, I keep returning to the same interest: building useful products and understanding why they work.
More context →Experience & proof
Credibility, in artifacts
01Companies & products
Founded and built software businesses from first systems through real operations.
02Technical work
Architecture, mobile products, automation, financial infrastructure, and AI-assisted systems.
03Public record
Essays, product artifacts, experiments, and conversations that show the work behind the claims.