PORTFOLIO · SR. MOBILE ENGINEERSANTA CATARINA · BR · REMOTE2026
MarceloMoresco.
Five years building mobile, web, and AI-powered backends for banks, fintechs, startups, and trading platforms. Expert in Flutter, with deep native iOS (Swift) and Android (Kotlin) experience.
I'm a Senior Mobile Engineer based in Santa Catarina, Brazil with 5 years shipping production-grade mobile and web apps. I specialize in Flutter/Dart with deep native iOS (Swift) and Android (Kotlin) experience, and I build AI-powered backends on AWS. Led architectural decisions on apps serving over a million active users, owned CI/CD pipelines, and released to both App Store and Google Play end-to-end.
Based in Brazil, Santa CatarinaREMOTE · FULL-TIME · CONTRACT
$
Experience
5 ROLES
Wartiva Ltda
Current
Senior Software Engineer·Austin, TX · Remote
May 2025 → Present
Web
Flutter Web
macOS
system tray
Summary
Senior Software Engineer at Wartiva, a cybersecurity startup. Take part in UI and architectural decisions for the app, drive the macOS system-tray companion that exposes CoreWLAN data via gRPC, and contribute Golang microservices to the backend.
Highlights
Led Flutter Web development using GoRouter and Provider over a customized MVC architecture.
Built a macOS system-tray companion, bundled in the product installer, that spawns a gRPC server to expose CoreWLAN data to the dashboard.
Integrated GraphQL for client-server communication, reducing request latency by 5 seconds.
Applied memory management and rendering performance best practices across web platforms.
Collaborated with the backend team on Golang microservices and internal tooling.
Technical reference for the mobile squad on a Flutter fintech app serving 1M+ active users. I owned architecture, CI/CD, native bridges, and store releases end-to-end.
Highlights
Designed modular Flutter/Dart architectures and served as technical reference for the mobile team.
Optimized CI/CD pipelines with Bitrise and GitHub Actions, cutting deployment time by 70%.
Implemented deep-link funnels via AppsFlyer, driving a 40% lift in user engagement.
Applied the bridge pattern for native communication via MethodChannel and EventChannel.
Full Stack Developer, Freelance·Jaraguá do Sul, Brazil
Freelance
-20%
admin workload
AWS
cloud native
GenAI
integrated
Summary
Responsible for building a banking-credit system. Flutter Web frontend, Node.js backend on AWS, integrations with external bank APIs, generative AI layer, crawler, and CCB issuance.
Highlights
Architected the entire system (Flutter Web frontend, Node.js services, AWS infra) applying SOLID across all fronts.
Automated CCB issuance by wiring the app to external banking APIs, collapsing a manual multi-step process into a single flow.
Integrated generative AI for admin copilots, cutting repetitive tasks by 20%.
Built the cloud-native backend on AWS (EC2, Lambda, CloudWatch, API Gateway) with observability wired in from day one.
Owned the product through multiple release cycles as a freelancer, handling planning, delivery, and support directly with the client.
First real production experience. Flutter app reaching 1M+ users, shipped as Flutter modules inside existing native iOS and Android apps. Also worked on simpler backend tasks with Spring WebFlux + Kotlin.
Highlights
Contributed to a Flutter application serving over 1 million active users.
Hands-on experience embedding Flutter modules into existing native iOS and Android apps.
Worked with Spring WebFlux in Kotlin on simpler backend tasks.
Designed and trained a custom Convolutional Neural Network (CNN) to identify skin conditions from images. Built the full pipeline, data preprocessing, model training, evaluation, and on-device inference, delivering a mobile-ready solution that classifies skin problems with high accuracy.
