Jonas L.

Jonas L.

Fullstack Developer

Fortaleza, Brazil
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About Me

Jonas is a Fullstack Developer combining technical experience, analytical abilities and good coding skills to produce scalable software solutions for clients - handling the dev lifecycle from conception to deployment. He is familiar with frontend and backend coding languages, development frameworks and 3rd-party libraries - ensuring compliance with non-functionals on scalability, resilience, configurability, upgradeability and responsiveness.

Work history

UpStack
UpStack
Fullstack Developer
2022 - Present (2 years)
Remote
  • Creating and developing innovative fullstack software solutions for clients across a broad range of industries.

  • Participate in scrums consisting of cross-functional teams, both software and hardware.

  • Ensure that features are being delivered efficiently and on-time.

Gerência Farm
Gerência Farm
Fullstack Developer
2021 - Present (3 years)
Fortaleza, Brazil
  • Designed, implemented and maintained solutions on the Gerência pesticide management and agric-traceability Android app.

  • Developed an event-driven GraphQL API with Rust, where all events are logged for later audit. Processed events (write side) into performant view data (read side) through CQRS pattern.

  • Integrated Keycloak’s user management, JWT and social login. Built React admin panel and Android app, which integrates Google Maps to delimit farm’s land.

GoShare
GoShare
Fullstack Developer
2018 - Present (6 years)
United States of America
  • Migrated legacy PHP backend to Kotlin (Spring/JVM) for greater maintainability and test coverage. Migrated inefficient PHP background tasks (pushes, delivery matching algorithm and third-party integrations) to Celery (Python async task queue) to scale throughput without increasing costs.

  • Designed and led the development of a public delivery API (Spring, Kong) to connect partner stores to professionals, as well as provided support directly to partners’ engineers.

  • Built a RabbitMQ event bus to stream data to API webhook, notification and websocket services. Cached user session and frequently used data with Redis to reduce latency and database usage. Worked with SQL modeling, Docker and servers (Haproxy, Nginx) and mentored new members.

Delfos IM
Delfos IM
Fullstack Developer
2017 - 2018 (1 year)
Fortaleza, Brazil
  • Met with stakeholders and did requirement analysis for a Wind Turbine inspection app. Built and implemented a hybrid wind turbine inspection application for Delfos IM.

  • Developed a hybrid app with Ionic 2 (Node.js), backend with Flask (Python) and PostgreSQL and web dashboard with Angular 2 (Node.js). Deployed on AWS with ECS, S3, Docker and Nginx.

  • Identified, troubleshot and resolved complex issues on the new inspection application.

Fit’s Company
Fit’s Company
Fullstack Developer
2016 - 2017 (1 year)
Fortaleza, Brazil
  • Designed a platform to match clients to personal trainers and for sport and fitness group classes.

  • Built a hybrid app with Ionic 2, backend and website with Django (Python) and MySQL. Integrated a payment system. Deployed on app stores and on AWS with Apache.

  • Developed the backend website application, built the frontend architecture and handled AWS deployment.

Queensland University of Technology
Queensland University of Technology
Native Android Developer
2015 - 2015
Brisbane, Australia
  • Designed and implemented solutions on the QUT medical research application.

  • Ensured the viability of the codebase on the app to provide users with high-quality services on the app.

  • Identified and provided mitigations to complex issues and risks on the project.

Portfolio

Fullstack Developer - Public Delivery API
Fullstack Developer - Public Delivery API

Led processes to design and develop a new Public Delivery API that connects partner stores to professionals - providing support directly to partner engineers. Delivered an event-driven system written in Kotlin to send notifications and webhooks through a RabbitMQ event bus and Python-based distributed asynchronous task queue.

Fullstack Developer - Gerência Farm
Fullstack Developer - Gerência Farm

Designed the Pesticide Management and Agriculture Traceability platform with an event-driven GraphQL API and Rust to log events for audits and integrated Keycloak for user management, JWT and social login. Built and implemented the React admin panel and Android app.

Fullstack Developer - Wind Turbine inspection app
Fullstack Developer - Wind Turbine inspection app

Worked on the Delfos hybrid wind turbine inspection application. Met stakeholders, handled requirement analysis, built the hybrid app, implemented backend solutions and web dashboard, and deployment to AWS.

Education

Information Technology Exchange Student
Information Technology Exchange Student
Queensland University of Technology
2014 - 2015 (1 year)
BSc. Computer Science
BSc. Computer Science
Federal University of Ceará
2012 - 2017 (5 years)