Pedro Simon

Staff software engineer with almost 10 years building software where a mistake matters: FDA-cleared medical devices, hospital EHR integrations, staking infrastructure, and AI bots running in production. I own systems end to end, from re-architecting a core data model to leading the migration that ships it, and I set technical direction on small teams. My core stack is Ruby on Rails and TypeScript/React, with agentic AI woven into how I work every day.

1. Independent clients

   2026 – Present

   AI Bots & Automations (Freelance)

   • Build sales and support bots that plug into the systems a business already uses (stock, prices, CRM) and answer customers over WhatsApp, Instagram, TikTok, and Facebook.
   • For a tech retailer with more than 90,000 Instagram followers, I run a production bot handling roughly 6,000 conversations and 23,000 incoming messages a month.
   • The bots run on Chatty, a platform I built on top of Chatwoot to host and orchestrate them.

2. Buoy Software

   June 2023 – Present

   Staff Software Engineer & Tech Lead

   • Built and expanded an FDA-cleared (510(k)) Software as a Medical Device that automates clinical-review decisions on behalf of physicians and qualified staff across roughly 1.6 million plasma donations a year. It covers the whole donor journey, from enforcing required tests after the check-in questionnaire to evaluating incoming lab results and deciding what happens to each unit — work that used to take a qualified reviewer 5 to 15 minutes per result set, with 2 to 4 sets per unit.
   • Tech-led a lab-workflow initiative that cut the samples drawn per donation from as many as 4 down to as few as one while running the same test panels, saving plasma, vials, and processing time across all 1.6 million annual donations.
   • Re-architected the core test-results schema. The old one was denormalized and hardcoded, and it had caused production performance problems the team kept patching with brittle, expensive SQL views. The new model is normalized and leaves room to support more blood products and processes down the line.
   • Built a component system in Rails ViewComponents, Tailwind, and Stimulus that's now reused across three apps, and contributed heavily to the company design system, including 15+ version upgrades and leading the Tailwind v4 migration. This sped up UI work across teams.
   • Carried a large React-to-Rails migration, moving dozens of screens to ViewComponents and Hotwire/Stimulus. The old React-over-GraphQL setup was hard for the team to reason about and a steady source of bugs, so leaning into Rails conventions let us ship faster with fewer of them. Along the way I established reusable patterns for multi-step flows and page layouts that the rest of the team built on. Earlier I also helped move a React Native check-in kiosk to the web so it was easier to change and matched the rest of our stack.
   • Built a workflow engine from scratch for the operational processes that live outside the core blood-product system, like logging an adverse donor event. It works a bit like n8n: a form builder with conditional fields, multi-step flows with actions that change system state in between, a visual drag-and-zoom editor, versioning, and publishing.
   • When our client acquired a new donation center, built a system in about a month to import that center's donors and their visit history on the fly, with Snowflake-backed identity matching and configurable lookback windows.
   • Work as the senior IC on a team of five, setting technical direction and reviewing the team's work. I also share my AI engineering workflow regularly, for example walking the team through how I take a Jira ticket from start to finish with Cursor and Claude.

3. Stakin

   Jan 2022 – May 2023

   Senior Full-Stack Engineer

   • Built Stakin's institutional staking dashboard from scratch as the only engineer on it. It pulls a client's addresses across 30+ blockchains into one portfolio view, with real-time APRs, portfolio history, and tax reports clients rely on for filing with their governments. Around 200 institutional clients were using it when I left.
   • Ran blockchain data analysis to power the dashboard's portfolio metrics, APRs, and reporting across all those networks.
   • Designed and shipped an OpenAPI that partners use to integrate against the dashboard's data.
   • Led an SEO-focused redesign of the marketing site and pulled the company blog into it, which made the content easier to find and a better path into the staking products.

4. ValiDAO

   Software Engineer (Freelance)

   • Built a staking app for a proof-of-stake validator. It connected to users' wallets, pulled data directly from the blockchains, and surfaced it through dashboards. Built with Viem, Wagmi, and RainbowKit.
   • Designed a referral system on top of the chain: stakers who delegated with a referral memo earned extra rewards, giving the validator a built-in growth loop.

5. Epion Health, Inc.

   Aug 2019 – Jan 2022

   Senior Software Engineer

   • Helped build the integration layer that let Epion connect to different EHRs through a single adapter pattern, covering Epic, Cerner, and Athenahealth. It pulled in demographics, medications, allergies, and patient history.
   • Built a telemedicine app during COVID (Twilio, React, Redux, Material UI) in about six weeks. It went live to real patients and providers for virtual visits.
   • Led the frontend team, around 15 engineers at its largest, and built the company design system in React, Storybook, and Chromatic. The kiosk, mobile-web, and telemedicine apps all used it, which made spinning up new screens much faster.
   • Built and maintained a browser extension for providers that surfaced things like appointments and patient context right inside Epic, Cerner, and Athenahealth.

6. Wikn

   Jul 2016 – Dec 2021

   Founder & Independent Software Engineer (Freelance)

   • Ran my own software practice alongside my full-time roles. The main project was a production e-commerce and retail-management platform (Next.js, Nest.js) for a retailer, covering POS, inventory, and warranties, plus payment, shipping, and maps integrations. It handled real day-to-day operations.
   • Owned the work end to end and eventually grew it into a team of five.

7. Bonzzu Inc.

   Feb 2019 – Aug 2019

   Software Engineer

   • Built full-stack features in React and Scala (Play) for an investment-portfolio tool at a large US bank. It interviewed investors to figure out their risk profile and then suggested opportunities. I also handled the DocuSign integration.
   • Acted as the React champion for the team, shaping frontend patterns and best practices. Improved routing with the History API, stabilized the e2e tests, and cut frontend compile times through Webpack tuning.

8. Innovavista.net

   Jul 2016 – Feb 2019

   Full-Stack Developer

   • My first engineering job, at a software studio in Rosario, and where I cut my teeth. I worked across a lot of different client projects: management systems for architecture firms, an ERP for a food manufacturer, a ticketing app with an interactive stadium map for a local football club, and a good amount of web design.
   • Built ERP modules from scratch with Zend, Doctrine, and JavaScript/Knockout, and helped tighten up the team's development practices.

• Build an AI DeepSearch System in TypeScript, aihero.dev (2025)
• TypeScript Type Transformations, Total TypeScript (2023)
• CSS for JavaScript Developers, Josh Comeau (2023)
• Scala & Functional Programming coursework: Functional Programming Principles, Functional Program Design, Parallel Programming