Viviane Dias

 Barcelona, Spain • +34695149627 • vivipirolad@gmail.com • LinkedIn • Portfolio

SUMMARY

Full-stack engineer with 7+ years shipping products in TypeScript and React. Currently at Qonto, owning a core piece of the banking onboarding experience and founder of LEZZ, an event discovery app. Deep experience with leading AI adoption, optimizing performance, and shipping features that impact real users. Passionate about quality, clean code, and user-centric design.

CORE SKILLS

• Languages: TypeScript, JavaScript, SQL, HTML5, CSS3
• Frontend: React.js, Next.js, React Native, Apollo Client, performance profiling, Core Web Vitals, Accessibility (a11y)
• Backend & Data: Node.js, GraphQL, REST APIs, PostgreSQL, AWS (Lambda, RDS), Serverless, microservices
• AI: LLM-powered product features (GPT-4, LlamaIndex.TS), agentic developer tooling & workflows
• Quality & Delivery: Jest, React Testing Library, Cypress, error monitoring, CI/CD (GitHub Actions), Docker, Playwright, Vitest

PROFESSIONAL EXPERIENCE

Qonto, Remote        July 2025– Present

Senior Frontend Engineer

• Main engineer for KYC (Know Your Customer), a cornerstone of the customer-facing banking onboarding experience, spanning 4 applications and 1K+ users daily.
• Redesigned and shipped a new KYC architecture across all markets, from onboarding through customer lifecycle, with 0 regressions after launch.
• Own the KYC domain's reliability: drove key app error rate from ~93/day average (207/day peak) down to ~1.5/day.
• Led AI adoption across engineering through workshops on agentic tools and workflows, and established testing patterns via lint rules adopted by all web teams.

iFood, Remote        January 2025– July 2025

Senior Frontend Engineer

• Optimized a merchant-facing negotiation platform serving 250K+ daily active users (restaurants and consumers), improving performance and usability at scale.
• Shipped 2 features in 3 months that drove a 5% increase in negotiation success between restaurants and consumers.
• Authored the business unit's testing guidelines, raising test adoption and coverage across teams.

Medusa Lab, Remote        October 2022 – December 2024

Co-Founder & Software Developer

• Co-founded a product studio; scoped features directly with clients and owned delivery across data models, APIs, and React frontends in greenfield and existing TypeScript codebases.
• Launched six products on deadline and maintained them in production across their full lifecycle.
• Integrated user analytics into shipped products, using the data to steer design decisions and improve retention.

Mapa do Acolhimento, Remote        January 2024– December 2024

Tech Lead

• Engineered a matching algorithm on AWS Lambda + Serverless (TypeScript), increasing successful matches by 78% YoY.
• Migrated the production database to AWS RDS with zero downtime, collaborating with a data engineer.
• Built scalable frontends with Next.js and TypeScript, improving SEO and performance.
• Led a team of 3 developers to deliver 10+ features with 80% test coverage and 65% fewer bugs; ran A/B tests to steer the product roadmap.
• Cut infrastructure costs by 45% through tech strategy optimizations; automated CI/CD with GitHub Actions.

Thoughtworks, Remote        June 2021 – October 2022

Senior Software Developer

• Led three major feature projects for a client platform with 1,000+ daily active users, aligning stakeholders on business rules and delivery.
• Profiled and improved app's performance while reducing tech debt across the codebase.
• Championed testing and accessibility best practices, driving clean, maintainable code across teams.

Apoia.se, Remote        January 2021 – June 2021

Full-stack Developer

• Built a checkout feature bridging legacy and modern systems on a crowdfunding platform.
• Drove adoption of Clean Code standards that improved readability and maintainability.

Nossas, Remote        November 2019 – December 2020

Junior Full-stack Developer

• Built a real-time user-matching system with Node.js and GraphQL subscriptions in a microservices architecture, increasing successful connections by 50%.
• Developed a connection-management platform in React.js with Apollo Client for data fetching, caching, and state management, supporting 300+ matches per month.
• Led the migration of the main repository to Next.js + TypeScript with comprehensive testing, raising the Lighthouse performance score from 59 to 85.
• Operated a microservices ecosystem with Docker/Rancher and Hasura as a GraphQL backend-for-frontend.

EDUCATION

University of São Paulo, São Paulo, Brazil        January 2016 - December 2020

Bachelor's, Social Sciences

Reprograma, São Paulo, Brazil        October 2018 - December 2018

Bootcamp, Full Stack Development

PROJECTS

LEZZ, Remote        October 2025 - Present

Founder & Developer

Social events app connecting LGBTQ+ women to community events in São Paulo: location-based event discovery, attendance, and community profiles. React Native, Expo, Supabase; sole owner of product direction, design, and engineering. Live on the App Store and Google Play.

Kids Timer App, Remote        December 2024 - April 2025

Software Developer

React Native + Expo with Rive animations; published to iOS & Android stores.

IAna Chatbot - Bill & Melinda Gates Foundation, Remote        August 2023 - October 2023

Tech Lead

GPT‑4 assistant integrated in Moodle via LlamaIndex.TS; improved volunteer training quality.

Conviction Voting App, 1Hive, Remote        October 2019 - February 2020

Open Source Contributor

Early contributor; React & Solidity; strengthened DAO governance UX.

LANGUAGES

• English: Advanced proficiency
• Portuguese: Native