# André Silva - Full Professional Biography & Technical Profile

**Title**: Senior Software Engineer  
**Website**: https://andresilvase.dev/  
**GitHub**: https://github.com/andresilvase  
**Contact Email**: anprofelipe@gmail.com  
**Location**: Brazil / Remote Worldwide  
**Total Experience**: 8+ years in software engineering, 5+ years in fintech and consumer mobile/backend engineering  

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## Executive Summary

André Silva is a Senior Software Engineer specializing in cross-platform mobile development with Flutter/Dart and backend microservices with Go (Golang), PostgreSQL, Docker, and AWS. Over his 8-year career, he has built, optimized, and scaled financial products serving millions of users at leading fintech companies including Nubank (Latin America's largest digital bank), Jeitto, and Savana (USA).

His expertise spans mobile app architecture, Android Instant Apps, high-throughput financial features (PIX payments, credit issuance, Tap to Pay), web & mobile accessibility (WCAG 2.2 / VPAT compliance), and full-stack software development.

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## Technical Skills Matrix

- **Languages**: Dart, Go (Golang), TypeScript, JavaScript, Kotlin, Clojure, SQL
- **Mobile Engineering**: Flutter, Android Native, iOS Native, Android Instant Apps, BLoC, Provider, Riverpod, GetX
- **Backend & Cloud**: Go (Golang), Node.js, PostgreSQL, Firebird, SQLite, Docker, AWS (Amazon Web Services), GCP (Google Cloud Platform), Firebase (Auth, Firestore, Hosting, Analytics), REST APIs, Microservices
- **Architecture & Practices**: System Design, Clean Architecture, CI/CD, Unit Testing, Integration Testing, Code Reviews, Web Accessibility (WCAG 2.2, W3C WAI-ARIA, VPAT)
- **Languages Spoken**: English (Fluent - IELTS Band 9.0), Portuguese (Native), Spanish (Intermediate)

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## Comprehensive Work Experience

### 1. Jeitto | Payment Institution
**Role**: Senior Software Engineer  
**Period**: November 2024 – July 2026  
**Location**: São Paulo, SP, Brazil  
**Highlights**:
- Led mobile development for Jeitto's Insurance platform (Seguro AP), driving over 2,090 contracts and R$8.5K in Net Interest Margin (NIM) within 4 months post-launch.
- Co-led Jeitto's migration from native Android to Flutter and successfully launched the company's first iOS app, achieving 46K downloads in month one with a 65% signup conversion rate.
- Shipped core fintech features including PIX cash-in, bill payments, biometric authentication, and mobile top-ups to expand Jeitto's financial product portfolio.
- Led mobile development for Jeitto’s Tap to Pay initiative, enabling users to accept credit card payments directly on their smartphones without additional hardware.
- Collaborated closely with backend teams to define scalable API contracts and backend integrations.

### 2. Savana | End-to-End Digital Banking Platform
**Role**: Senior Flutter Engineer  
**Period**: February 2025 – February 2026  
**Location**: Malvern, PA, USA  
**Highlights**:
- Led accessibility remediation for Savana's mobile application and website, achieving VPAT and WCAG 2.2 compliance.
- Defined semantic best practices in Flutter, documenting correct `Semantics` widget usage for screen reader compatibility in accordance with the W3C Web Accessibility Initiative’s ARIA Authoring Practices Guide.
- Bridged Flutter Web accessibility gaps by implementing ARIA attributes via JavaScript for screen reader compatibility.

### 3. Nubank | Nu Pagamentos S.A.
**Role**: Software Engineer  
**Period**: October 2021 – August 2024  
**Location**: São Paulo, SP, Brazil  
**Highlights**:
- Migrated Nubank's Android and iOS applications to Flutter, accelerating cross-platform feature delivery for 100M+ users.
- Constructed an Android Instant App, increasing daily new account registrations by 11,000 users.
- Redesigned the PJ (Business Account) app’s home screen, achieving an 88% user satisfaction rating post-launch.
- Resolved a critical session-switching bug between PF (Personal) and PJ (Business) accounts, increasing switching success rate from 75% to 98% and significantly reducing support escalations.
- Provided technical mentorship to incoming engineers, guiding squad onboarding and technical execution.

### 4. Evertec Brasil
**Role**: Flutter Developer  
**Period**: February 2021 – September 2021  
**Location**: Porto Alegre, RS, Brazil  
**Highlights**:
- Built core fintech features (PIX payments, QR code scanning, and transaction history) for a white-label mobile app using Flutter and Dart.
- Conducted code reviews, optimized app performance, and onboarded incoming developers.

### 5. Koi Systems
**Role**: Mobile Frontend Developer  
**Period**: June 2021 – July 2021  
**Location**: Montijo, Setúbal, Portugal  
**Highlights**:
- Developed the official mobile application for the Portuguese Table Tennis Federation using Flutter, DIO (REST API), and Provider.

### 6. Magica Digital
**Role**: Freelance Mobile Developer  
**Period**: February 2021 – July 2021  
**Location**: Cáceres, MT, Brazil  
**Highlights**:
- Built mobile apps with REST API integration and state management (GetX, Riverpod) for freelance clients.

### 7. Cubos Tecnologia
**Role**: Freelance Flutter Developer  
**Period**: February 2021 – April 2021  
**Location**: Salvador, BA, Brazil  
**Highlights**:
- Contributed to Cactvs, a digital banking platform for entrepreneurs, using Flutter and UI/UX optimization.

### 8. Supera Inovação em Tecnologia
**Role**: Freelance Mobile Developer  
**Period**: June 2020 – November 2020  
**Location**: Goiânia, GO, Brazil  
**Highlights**:
- Launched UsadosBR, a major vehicle marketplace app for Android and iOS using Flutter with BLoC and REST APIs.
- Implemented vehicle listings, filters, lead capture forms, and managed full app store release processes.

### 9. ZScan Software
**Role**: Frontend Developer Intern  
**Period**: July 2019 – June 2020  
**Location**: Goiânia, GO, Brazil  
**Highlights**:
- Developed medical imaging examination software deployed across Brazil and South America using React, TypeScript, JavaScript, Firebase, and Firebird.

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## Notable Projects Portfolio

1. **Erosyn**
   - *Description*: Privacy-focused social platform for verified adults featuring identity verification, encrypted messaging, and profile management across web and mobile.
   - *Tech Stack*: Flutter, Go (Golang), Firebase, AWS, PostgreSQL
   - *Link*: https://erosynbr.com

2. **Iskedoo**
   - *Description*: Cloud-based scheduling platform for service businesses with real-time calendar sync, staff management, and automated notifications.
   - *Tech Stack*: Flutter, Firebase, Google Maps Platform, Node.js
   - *Link*: https://iskedoo.com.br

3. **Tiutiu - Animal Adoption**
   - *Description*: Animal adoption platform connecting shelters and adopters with search filters and in-app messaging. Open source on GitHub.
   - *Tech Stack*: Flutter, Firebase, GCP, SQLite, Node.js
   - *Link*: https://tiutiu.com.br | GitHub: https://github.com/andresilvase/tiutiu

4. **Nubank App**
   - *Description*: Flagship mobile app for Nubank, serving 100M+ customers across Latin America.
   - *Link*: https://play.google.com/store/apps/details?id=com.nu.production&hl=pt

5. **UsadosBR App**
   - *Description*: Marketplace app for buying and selling vehicles in Brazil.
   - *Link*: https://play.google.com/store/apps/details?id=com.usadosbr.usadosbrapp&hl=pt

6. **ShortCut Link (CutLink)**
   - *Description*: Lightweight, high-speed URL shortener service.
   - *Tech Stack*: Flutter, Dart, Node.js
   - *Link*: https://short.cutli.ink/ | GitHub: https://github.com/andresilvase/cutlink-app

7. **FSecret - Secret Santa**
   - *Description*: Secret Santa generator platform for groups and families.
   - *Link*: https://fsecret.com.br/

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## Certifications & Education

### Education
- **Pontifical Catholic University of Goiás (PUC Goiás)** — Computer Science / Software Engineering

### Technical Certifications
- **Database Integration in GO** — Rocketseat (2025)
- **Advanced HTTP Server Concepts** — Rocketseat (2024)
- **Mastering the System Design Interview** — Udemy (2024)
- **Clojure Programming** — Alura (2023)
- **AWS Cloud Practitioner Essentials** — AWS (2022)
- **IELTS Band 9.0 (English Proficiency)** — Elsa Speak (2022)
- **Software Architecture Fundamentals** — desenvolvedor.io (2021)
- **Modern Programming with Kotlin** — Cod3r Cursos (2021)
- **Reactive Programming in Flutter with Bloc** — Udemy (2020)
- **Flutter and Dart - Learn and Build iOS and Android Apps** — Udemy (2020)

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## Contact & Profile Information

- **Website**: https://andresilvase.dev/
- **GitHub**: https://github.com/andresilvase
- **Email**: anprofelipe@gmail.com