04/30/2026 updated
100 % available
Senior Android & Fullstack Developer | Kotlin, Laravel, NestJS, APIs
Franca, Brazil
Only remote
Computer Engineering - University Graduate (Estacio, 2023-2027)About me
Senior Android and Fullstack Developer with 6+ years of experience building Kotlin apps, Laravel/NestJS backends, APIs, dashboards and SaaS MVPs. I help companies turn complex workflows into reliable mobile-first systems and integrations.
PHPAndroid (Software)C++ (Programming Language)LaravelBackendKotlinJetpack ComposeNestJS
Native Android Development
Senior experience in native Android development using Kotlin and Java, including development, maintenance, refactoring and production support for business-critical applications such as POS, PinPad, smartPOS and ticketing/payment-related apps.
Kotlin, Jetpack Compose & Android Architecture
Strong experience with modern Android development using Kotlin, Jetpack Compose, MVVM, Clean Architecture principles, dependency injection, modularization, state management and maintainable UI layers.
Android Integrations & APIs
Solid experience integrating Android applications with REST APIs, SDKs, payment flows, device features, background services and external systems. Skilled with Retrofit, OkHttp, RxJava, Coroutines and asynchronous programming.
POS, PinPad & Payment Applications
Hands-on experience with POS/smartPOS environments, TEF/payment integrations, transaction flows, device communication, production debugging and reliability improvements for payment-related Android applications.
Backend Development
Fullstack experience building and maintaining backend systems using PHP, Laravel, NestJS, Node.js, REST APIs, MySQL and PostgreSQL. Able to design admin panels, internal tools, SaaS MVPs, dashboards and API-driven applications.
Laravel & SaaS Systems
Experience developing Laravel-based business platforms, including authentication, permissions, multi-user workflows, file uploads, reports, dashboards, integrations, background jobs and operational management systems.
NestJS, APIs & Integrations
Experience building structured backend services with NestJS, REST APIs, webhooks, queues, database integrations and service-to-service communication for scalable business applications.
Databases & Data Modeling
Experience with MySQL and PostgreSQL, including schema design, queries, relationships, indexes, migrations, data import/export and reporting-oriented structures.
C, C++ & Low-Level Integrations
Knowledge of C and C++ for low-level integrations, JNI bridges, device communication, embedded-related workflows and performance-critical scenarios.
Web, Dashboards & Internal Tools
Experience creating web dashboards, admin panels, internal business systems, reporting tools and operational workflows for companies that need to replace spreadsheets, manual processes and fragmented tools.
DevOps & Deployment
Experience deploying and maintaining applications on Linux servers, configuring environments, working with cloud storage, APIs, background workers, logs and basic monitoring for production systems.
Main Technologies
Kotlin, Java, Android SDK, Jetpack Compose, MVVM, Retrofit, OkHttp, RxJava, Coroutines, PHP, Laravel, NestJS, Node.js, MySQL, PostgreSQL, REST APIs, Docker basics, Linux, Git, AWS S3, HTML, CSS, JavaScript, Bootstrap.
Professional Focus
I help companies build reliable mobile apps, internal systems, SaaS MVPs, dashboards, API integrations and automation.
Experience
Professional experience5 - 10 years
Freelancer since2025
Languages
EnglishFluentPortugueseNative speakerSpanishFluent
Project history
Working on the development and maintenance of the smartPOS, PinPad and POS.
Working on the development and maintenance of the smartPOS ticket sales app.
Maintenance and development of applications for ecommerce platform.