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gfiori.dev

Building Scalable Web Solutions & Developer Tools

Product-minded Software Engineer with over 8 years of experience building full-stack web apps with top-notch user experience.

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Selected Highlights

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SaaS at Scale

30M+ MAU

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Event Tracking Accuracy

95% Data Integrity

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Feature Delivery

50% ETD Reduction

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Experience

Experienced across startup, enterprise, and R&D environments.

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Product Impact

  • Launched a Full Formulary feature integrating FDA's RxNorm drug data, unlocking prescribing of any medication — a requirement to onboard the company's largest US client. @ Foundation Health, Health Tech startup
  • Contributed to full-stack development of a large-scale legal SaaS serving millions of monthly active users — spanning APIs, microservices, document pipelines, A/B testing, and observability. @ Jusbrasil, Brazil's largest legal tech platform
  • Rewrote a legacy internal system from scratch, cutting estimated delivery time of new features by ~50%. @ Flex, manufacturing company
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Developer Experience & Infrastructure

  • Automated QA workflows by integrating 1Password SDK and Auth0 Management API, enabling E2E tests with real user accounts in a 2FA-enabled environment. @ Foundation Health, Health Tech startup
  • Prevented service downtime caused by NPM outages by restructuring container builds to resolve dependencies at build stage instead of runtime. @ Foundation Health, Health Tech startup
  • Implemented a GA4 tracking plan achieving 95% event data integrity across the entire site. @ Jusbrasil, legal tech SaaS
  • Building internal apps, Dev tools and automations for Customer Support and Marketing integrations. Focusing on streamlining staff workflows and improving Developer Experience (DevX). @ Smarter Contact, market-leading communications platform for real state professionals
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R&D & Innovation

  • Ported an open-source JavaScript SDK to Kotlin for building AR/VR apps on Android, collaborating with a global team based in South Korea. @ Sidia / Samsung R&D Institute
  • Built a self-service kiosk Android app integrated with a payment terminal for a major retail company. @ Sidia / Samsung R&D Institute
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Technical Arsenal

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Concepts

Event-driven Architecture (EDA)Layered/Onion/Clean ArchitectureFeature-Sliced Design (FSD)Domain-Driven DesignTest-Driven DevelopmentInfrastructure as code (IaC)CachingREST
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Languages & Frameworks

TypeScriptGo (Golang)PythonJava / KotlinNode.jsbunGinCobra
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Cloud & DevOps

Google Cloud (GCP)DockerTerraformCI/CDGitHub ActionsCircleCIDigital OceanFirebaseSupabaseKubernetes
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Data & Tools

Relational DatabasesNon-relational Databases (NoSQL)PostgreSQLPub/Sub (Kafka)SQLiteElasticsearchRedisGraphQLMongoDBFirestoreGitOpenAPI (Swagger)
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Frontend & UI/UX

React.jsViteNext.jsSvelteSvelteKitFigmaDesign System
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Testing

Unit testsIntegration testsEnd-to-end tests (e2e)JestVitestReact Testing Library (RTL)supertestCypressPlaywright