Fabricio Tramontano Pirini
Senior Engineer, Growth and Experimentation
Brazil (UTC -3)
Senior engineer with 9+ years in React, Next.js, and TypeScript. Built the first A/B experimentation program at an online grocery startup. Owned the platform, the experiments, and the measurement. Ran 2 to 4 live experiments per month. Opened Finland and Germany by removing locale blockers. Currently setting up event tracking at a US crypto exchange using Segment. WCAG 2.0 AA compliance across 70+ European properties.
Technical Skills
Languages & Runtimes: TypeScript, JavaScript (ES2024+), HTML5, CSS3, Node.js
Frameworks & UI: React, Next.js, Redux Toolkit, Tailwind CSS, Radix UI
Analytics & Experimentation: Segment, Mixpanel, Growthbook, LaunchDarkly, Unleash, StatSig
Testing & Quality: Playwright, Vitest, Jest, React Testing Library, Storybook
Tooling & DevOps: Docker, CI/CD (GitHub Actions), GraphQL, Figma, Power BI
Professional Experience
Leading Cryptocurrency Exchange Platform - US Client
Contractor - Frontend Engineer
Brazil (Remote)
Nov. 2024 - Present
- Set up Segment tracking for the Support Center portal across web and 3 React Native apps, instrumenting experiment touchpoints to measure feature adoption and retention signal.
- Cut visual regression test runtime from 12 min to under a minute by building the Playwright VRT infrastructure from scratch. Coverage tripled across the component library.
- Built 15+ dynamic financial data tables with search, deep-linking, copy, and i18n support.
- Fixed 25+ accessibility issues platform-wide: keyboard navigation, focus management, and ARIA attributes.
Norsk Gjenvinning
Lead Software Engineer & Tech Lead
Norway (Remote)
Sep. 2023 - Sep. 2024
- Managed 5 engineers across 2 time zones. Built the sprint cadence, code review process, and CI/CD setup from scratch.
- Shipped 5 storefronts with React, TypeScript, and Next.js. Built a shared component library adopted by 3 product teams.
Lead Frontend Engineer
Sep. 2022 - Aug. 2023
- Set up Google Analytics and SEO tooling from scratch for Norwegian client properties, including Norsk Gjenvinning, one of Norway's largest recycling companies.
- Got Core Web Vitals into the green on key checkout routes (LCP under 2s) through code splitting, lazy loading, and edge caching.
- Integrated 5 storefronts with Sanity CMS, giving the content team full control over brand-aligned pages without engineering involvement.
- Led WCAG 2.0 AA compliance across e-commerce storefronts and brand landing pages for a portfolio of 70+ European companies.
Oda
Software Engineer
Norway
Aug. 2020 - Aug. 2022
- Built the A/B experimentation program from scratch, the company's first, while also owning the platform it ran on. Ran 2 to 4 live experiments per month through a 2x headcount growth.
- Ran a hero-removal experiment expecting higher conversion. It dropped. The introductory layer was providing context users needed to commit. Killed the variant on data, not instinct.
- Shipped a stripped onboarding flow (stepper + logo only, minimum data per step) with lead capture for out-of-coverage users. Conversion increased.
- Removed hard-coded locale configurations blocking international expansion. Finland and Germany launched without engineering changes to the core platform.
- Picked by the Chief Growth Officer (ex-VP Growth, Skyscanner) for an internal growth program cohort after standing out at a company-wide growth workshop.
Sportradar
Full Stack Engineer
Norway
Sept. 2018 - Aug. 2020
- Refactored web crawlers and scrapers into 5 independent microservices, cutting runtime by 120x and resource usage by 10x.
- Migrated CI/CD from Jenkins to GitLab, reducing deploy failures by 85% through Docker containerization and pipeline redesign.
Samsung R&D Center
Software Engineering Intern
Campinas, Brazil
Jan. 2017 - Jan. 2018
- Built a WCAG 2.0 AA Web Accessibility portal and automated internal reporting dashboards with Power BI.
- Contributed to IoT prototype R&D and gave talks on Web Accessibility at 2 industry conferences.
Education
Universidade Federal de Itajuba - UNIFEI
Bachelor of Science in Computer Engineering
Itabira, Brazil
2011 - 2018
University of Toronto
Exchange Student, Electrical and Computer Engineering
Toronto, Canada
2013 - 2014
