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Lelis – Flutter, Dart, Android, experts in Lemon.io

Lelis

From Brazil

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Mobile DeveloperSenior
13 years of commercial experience
Fintech
Healthcare
Job and career services
Logistics
Real estate
Sales
Mobile apps
Platforms
Lemon.io stats
1
projects done
288
hours worked
Open
to new offers

Lelis – Flutter, Dart, Android

Meet Lelis, the humble and down-to-earth developer with a versatile background. With experience in various technologies and fields like BE, Salesforce, DevOps, and FE, Lelis has gained a deep understanding of how things work from different perspectives. As a former Team Lead, he excelled in refactoring and code reviews. His expertise lies in Flutter and Dart, where he has created exceptional services using clean architecture. Lelis' switch from Android and Xamarin to Flutter is a big plus, showcasing his adaptability. And his clean code and strong testing skills make him a Senior-level developer.

Main technologies
Flutter
6 years
Dart
6 years
Additional skills
Android
iOS
.NET
JavaScript
Typescript
API
ASP.NET
AWS
GCP
Microsoft Azure
Xamarin
Swift
Kotlin
OpenAI API
ML Kit
Ready to start
ASAP
Direct hire
Potentially possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Tech Lead
Nov 2022 - Nov 20231 year
Project Overview

An app to enable visual and standardized cargo inspection processes. This digital solution brings efficiency but also valuable insights that can be used to prevent damage claims. Lelis rewrote the React application to Flutter and created BFF using Firestore, Node.js, and Azure hosting.

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Responsibilities:
  • Led the team to implement clean architecture and TDD with Flutter
  • Conducted several proof-of-concepts for QA/barcode scanning, camera resources, dynamic form builder, and CI/CD pipelines
  • Ran pair programming and code review with Flutter and Typescript
  • Published and maintained mobile app store releases
Project Tech stack:
React
Flutter
Azure DevOps
GCP
Node.js
Typescript
Mobile Architect, Tech Lead
Mar 2017 - Nov 20225 years 7 months
Project Overview

The platform for vetted job candidates. It keeps them connected to new job opportunities, showcases their skills, interacts with a complete built-in community, earns rewards and training discounts, and submits timesheets, expenses, and invoices.

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Responsibilities:
  • Created architecture for Android and iOS
  • Implemented candidate screening chatbot
  • Created marketing automation journeys
  • Established integration with Salesforce
  • Configured ci/cd for each environment
  • Wrote services in Dart
  • Did DevOps-related tasks
  • Hired and built the whole team
  • Disseminated agile throughout the team
Project Tech stack:
Android
iOS
Clean Architecture
VIPER
GCP
Bitrise
Salesforce
Kotlin
Swift
Dart
gRPC
Flutter
Senior Flutter Developer
Nov 2021 - Feb 20223 months
Project Overview

This is an appealing diabetes control app designed for newly diagnosed patients. Users can quickly enter their blood sugar level, generate PDF monthly reports, and share them with doctors. They can choose either a free or paid app theme.

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Responsibilities:
  • Designed the app layout
  • Developed the Android version
  • Debugged and resolved the application issues
  • Integrated with payment gateways
  • Collected analytics, crashes, and user behavior
  • Fine-tuned app performance
  • Performed DevOps tasks
Project Tech stack:
Flutter
Dart
gRPC
Firebase
Fastlane
GCP
Microservices
Senior Full-Stack Developer
Oct 2016 - Apr 20175 months
Project Overview

A solution for managing external sales teams which improves track team performance and reduce operational costs, boosting productivity. It includes monitoring visits, sales activity, sales funnel, CRM, expense control, and call center.

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Responsibilities:
  • Created architecture for both mobile and web
  • Created two mobile versions sharing the same core code
  • Developed both Android and iOS apps with C# on Xamarin
  • Set endpoints in C# and hosted at AWS
  • Published to both Apple and play store
Project Tech stack:
Xamarin
Android
iOS
C#
ASP.NET MVC
Microsoft SQL Server
Full-stack developer
Oct 2015 - Jun 20167 months
Project Overview

It is a platform that keeps clients up-to-date with their purchased apartments. It includes a news feed, construction timeline, installment balance, payment receipts, property documents, and a private chat with the constructor.

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Responsibilities:
  • Created front-end and back-end architecture
  • Implemented native Android version
  • Implemented native ios version
  • Implemented the web admin portal
  • Created database model
  • Tweaked to implement both the design and animation proposed fully
Project Tech stack:
ASP.NET
Android
Java
iOS
Swift
Microsoft SQL Server
Tech Lead, Senior front-end developer
Nov 2023 - Unfinished1 year 4 months
Project Overview

Providing consultancy services to company's clients

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Responsibilities:
  • Developed MVP web portal in 2 months with 3 developers
  • Developed native mobile Android/iOS applications in 4 months by himself
  • Developed MacOS desktop app with Flutter in 2 months and 1 developer
  • Achieved 1K active users in 3 months after the launch
  • Defined SDLC based on Scrum and Kanban using Jira and Roadmap
  • Reviewed pull requests and ran pair programming every day
  • CI/CD for web and mobile setup
Project Tech stack:
Flutter
Flutter WEB
React Native
React
Typescript
Dart
Jira
AWS
GCP
Bitbucket Pipelines
Clean Architecture
MVVM

Education

2002
Computer Engineering
BSc

Languages

Portuguese
Advanced
English
Advanced

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