Work

Selected work across products, platforms, and technical organizations.

Each case below is written as a set of decisions — the context, what was refused, what it cost, and what it taught — rather than as a list of deliverables. Where a number is not verifiable, it is not here.

Cases

AI product systems Building a seven-server MCP ecosystem as a developer product, not a code dump Seven Model Context Protocol servers published on npm, six in Rust and one in TypeScript. The interesting decisions were about credentials, install friction, and tool granularity — not about the protocol.
  • The product problem was not protocol support. It was that connecting an agent to a real account meant pasting long-lived credentials into a config file.
  • Tool granularity is the core product decision in an MCP server: too coarse and the agent cannot compose, too fine and it wastes context discovering what it can do.
Read the case → Product strategy Five public apps, and what shipping small things in the open actually teaches A resume builder that stores nothing, a VS Code extension that interrupts you, a tax-registry API, an image tool, and a game. Each one is a decision about scope, and one of them I would not build again.
  • Every app here exists because a constraint was interesting, not because the category was underserved — which is a real strategy and a real limitation.
  • Cresum's product is a refusal: no account, no server-side storage, all state in the URL. The constraint is the feature.
Read the case →

Where the evidence lives

7 packages MCP servers Model Context Protocol servers on npm, with live version and download data from the registry. 5 live Apps Small public products, each with its stack, feature set and operating model. npm + GitHub Open source Packages and repositories, listed from the registries at build time.

Context for the work

  1. 2024 — CTO, Guinea Mobile Telecom and IoT: an MVNO platform where other companies build connectivity products. Product, technology, operations and organizational design.
  2. 2020 — Technology consultant, Grupo Anta Digital transformation work across sectors, combining technical delivery with strategy.
  3. 2018 — 2023 Co-founder and CTO, Syma POS and electronic invoicing for the Peruvian market under SUNAT compliance rules. Intellectual property sold in 2023.

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