Carlos L.

Carlos L.

Backend Developer

Top performer 10/10
Brazil
Trusted member since 2024
8 years of experience

He specializes in Full-stack development (Backend-heavy), primarily using Python with frameworks such as Django and Flask. On the frontend, he prefers working with React.js and TypeScript to deliver responsive and maintainable interfaces.

Known for his ability to navigate complex technical challenges, Carlos consistently delivers high-quality solutions that align with both business goals and technical requirements. Clients value his deep technical acumen, structured problem-solving approach, and clear communication across all project stages.

With a rare blend of academic rigor and practical industry experience, Carlos brings strategic insight and execution excellence to every project he undertakes.

Main expertise

React.jsReact.js3 years
SpringSpring5 years
Spring BootSpring Boot5 years
Node.jsNode.js3 years
17+

Experience9

Software Engineer

Check Technologies
Financial Technology (FinTech)
Apr 2024 - Sep 2024 · 5m

Check Technologies is a payroll company with more than 150 000 endpoint clients.

  • Worked in the Tax team, focusing on full stack application doing tax management for SMBs.

  • Developed a report generator supporting multiple formats, maintained tax-related software systems, and optimized the performance of tax-related operations with thousands of entries.

  • Automated tax report submission to relevant agencies and developed public/private APIs

JavaScriptJavaScript
React.jsReact.js
PostgreSQLPostgreSQL
AWSAWS
RedisRedis
10+

Tech Lead and Engineering Manager

LEDS - IFES
Agriculture Tech (AgTech)
Oct 2022 - Mar 2024 · 1y 5m

LEDS is a startup accelerator lab dedicated to transforming problems into solutions and innovative ideas into market-ready products.

  • Led the development of a project aimed at detecting and preventing bugs and diseases in strawberry crops using image recognition

  • Served as both Tech Lead and Engineering Manager, with a focus on backend functionalities.

JavaScriptJavaScript
React.jsReact.js
DjangoDjango
PythonPython
SQLSQL
4+

Senior Software Engineer and Engineering Manager

LEDS - IFES
Agriculture Tech (AgTech)
Mar 2020 - Oct 2022 · 2y 7m
  • Led the development of Pink Pepper Qualifier, a project designed to assess the quality of pepper crops using image analysis

  • Acted as both Senior Software Engineer and Engineering Manager.

  • Applied neural networks (mainly Yolact and MobileNet) in machine learning processes.

JavaScriptJavaScript
React.jsReact.js
PostgreSQLPostgreSQL
DjangoDjango
PythonPython
3+

Senior Software Engineer and Engineering Manager

LEDS - IFES
Healthcare
Feb 2018 - Mar 2020 · 2y 1m
  • Led the development of Pink Pepper Qualifier, a project designed to assess the quality of pepper crops using image analysis

  • Acted as both Senior Software Engineer and Engineering Manager.

  • Applied neural networks (mainly Yolact and MobileNet) in machine learning processes.

JavaScriptJavaScript
Node.jsNode.js
DjangoDjango
PythonPython
Machine LearningMachine Learning

Senior Software Engineer and Engineering Manager

LEDS - IFES
Feb 2018 - Mar 2020 · 2y 1m
  • Developed a tool to 'Predict and Screen Frequent Mental Disorders' in the general population, that assessed with +90% accuracy the chances of a person having a mental disorder.

  • Was responsible for applying ontologies, conceptual models and Machine Learning.

  • Experimented with several ML strategies, and final implementation went with classical ML algorithms, such as random forest.

Software Engineer and Tech Lead

LEDS - IFES
Travel and Tourism
Feb 2016 - Mar 2018 · 2y 1m
  • Developed a mobile app for locating restaurants doing GoodWill in their local community.
JavaScriptJavaScript
IonicIonic
PythonPython

Associate Researcher - Software Developer

BizzDesign (The Netherlands)
Information Technology (IT) and Services
Feb 2015 - Dec 2015 · 10m

Bizzdesign is a Dutch BPM SaaS platform vendor.

  • Developed an extension to BiZZdesign primary tool in order to incorporate extensions to the ArchiMate language in the tool.

  • Responsible for performing the ontological analysis of the language concepts, in which the Unified Foundational Ontology (UFO) was used. In charge of concepts later introduced to ArchiMate standard in v3.0

  • The work performed received an award at the 2015 EDOC international conference in Australia.

JavaJava
Spring BootSpring Boot
SpringSpring
MavenMaven

System Analyst

FEC - Euclides da Cunha Foundation
Transportation Tech
Feb 2011 - Jun 2014 · 3y 4m

FEC company aims at transforming information into strategic assets.

  • Developed two main projects:

1) that enabled transformation of data from siloed systems into knowledge graphs that were accessible for both data definition and data retrieval throughout the company

2) a tool for showing how new legislation impacted current legislation, structuring and organizing client's information in order to integrate data across the company.

  • Was responsible for requirements analysis and elicitation, developing domain ontologies, conceptual models and implementing the two projects. The projects used semantic web technologies such as OWL, RDF, SPARQL (NoSQL) and the Virtuoso Database.
JavaScriptJavaScript
JavaJava
Spring BootSpring Boot
SpringSpring
MavenMaven
2+

Full Stack Developer

Mogai Technologies
Information Technology (IT) and Services
Jun 2009 - Feb 2010 · 8m

Mogai Technologies develop innovative technological solutions that enable efficient enhancement of complex industrial processes. The only Latin America company listed by the world’s leading technology consultancy (Gartner) as a top provider for computer vision solutions.

  • Responsible for developing and maintaining a system for a Brazilian Transportation Agency, both frontend, and backend.

  • Built the project in C# and .NET and used MySQL for the main product.

  • Also maintained legacy systems, and other services where PostgreSQL was also used for databases.

MySQLMySQL
PostgreSQLPostgreSQL
JavaJava
SpringSpring
C#C#
4+

Education

University of Twente
University of Twente
Computer Science2012 - 2017
FUO
Federal University of Espírito Santo (Brazil)
Computer Science2009 - 2011
FUO
Federal University of Espírito Santo (Brazil)
Computer Science2005 - 2009
FUO
Federal University of Espírito Santo (Brazil)
Computer Science2005 - 2009

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