I lead products from problem framing and design validation through production.
As a Tech Lead, I work across web, mobile, and AWS, use AI coding agents to deliver, and help teams adopt AI through clear rules.
Projects change. These are the skills I bring to each one.
- AI adoption. I set up AI practices that are part of the daily work, and that people can follow and review.
- Architecture and migration. I design systems that can change without breaking what clients depend on, and I plan migrations so they do not cause downtime.
- Product design and validation. Before building, I compare options and their tradeoffs. I make the assumptions explicit and validate decisions with the people involved.
- Quality and evidence. I work with TDD and check edge cases.
- Estimation and delivery. I split work into clear steps, estimate each one, and mark where a person needs to review. If a question is still open, I write down the assumption.
- Technical leadership and hiring. In interviews, I look at how people reason about systems and how they review generated code. I am the tech lead of one team, and I helped development, design, product, and QA start working with AI.
- claude-code-guardrails: Blocks pushes and merges to main without human approval and limits test workers based on available RAM.
- claude-code-mods: Requires a ticket in every commit, protects paid CI minutes, and closes worktrees when a PR opens.
- ccuse: Switches Claude Code accounts when one runs out of quota.
- tupase-mcp: Provides an MCP server for booking classes.
I do the design, the backend, and the app myself, and I use these products to test ideas before I bring them to a team.
- TorneosPadelUy: Covers amateur padel tournaments across Uruguay, with one Expo and React Native codebase for iPhone and web.
- PadelBump: Brings live professional padel to iPhone through Live Activities, with a backend that checks matches every 10 seconds.
- Pila: Reads Apple Health and recommends how much to train based on your own history, calculated on the phone rather than against averages.
I am open to conversations about AI adoption, architecture, and technical leadership. hernandezsanti.dev · [email protected] · LinkedIn
Most of my work lives in private client repositories.