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Lucas Penz

Senior Full Stack Engineer

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About Me

I am a Full Stack Software Engineer with 13 years of overall experience, out of which 11 years of hands-on projects and 2 years of teaching. I have worked with many programming languages, such as Ruby, Java, and PHP. I have worked for different types of businesses, like universities, schools, financial accounting, and e-commerce. I have managed teams following the Agile principles using Scrum/Kanban. I have an MBA in Project Management and I also was a volunteer at PMI. Moreover, I have worked as a professor at a university teaching about some topics like Ruby, Java and Project Management. I have a Master's in Computer Science and an MBA in Project Management.

Latest Projects

E-commerce

eCommerce Application, MIU (2020): Created e-commerce site in collaboration with one other team member. Stack: Angular, Node.js, Express, MongoDB

Source Code
Agendacard

AgendaCard (2019): Developed responsive web app to accommodate client-driven appointment scheduling for businesses such as hair salons. Stack: Ruby On Rails, MySQL, Javascript, Bootstrap, AWS, Redis, Sidekiq, Capistrano, MomentJS, Fullcalendar.io.

Source Code

Work Experience

Senior Software Engineer - Apple via TEKSystems (2022/Apr - 2024/Sep)

Leading multinational technology company specializing in consumer electronics, software, and online services. In 2021, it generated $365.8 billion in revenue and, as of June 2022, is the world's largest company by market capitalization.

  • I successfully implemented key adjustments to a large-scale project introducing major new physical processes in warehouses. This involved modifying approximately 25,000 lines of code while coordinating closely with multiple cross-functional teams, ensuring smooth integration and alignment across stakeholders.
  • Developed a robust API to facilitate seamless access to the system's data for other teams and external parties, improving collaboration and data integration across the organization.

Senior Lead Software Engineer - Line 5 LLC (2021/Jul - present)

Financial company which provides loans for customers to buy their car extended warranty.

  • Improved the quality of the software deliverables through changes on development/testing processes: including more efficient internal communication procedures, and designing a new task template for better describing the requests delivered to the engineers.
  • Led meetings with Product Owner and Development Team.
  • Managed application deploy and servers on Amazon EC2, S3.
  • Developed new features and bug fixes on the Ruby on Rails/React/Vue apps.

Senior Software Engineer - Line 5 LLC (2020/Nov - 2021/Jul)

Financial company which provides loans for customers to buy their car extended warranty.

  • Developed new features and bug fixes on the Ruby on Rails/React/Vue apps.
  • Developed a new self service software using Vue.js which allowed the company to sell their products directly to final customers instead of doing it through dealers.
  • Boosted some queries' performance: up to 100x faster.

Professor - Federal Technological University of Parana (2017 - 2019)

Nationally renowned university with 13 campuses.

  • Planned and delivered IT courses.
  • Created hands-on Agile Development course, using Ruby on Rails, GIT/Github, PostgreSQL, Ubuntu, and Bootstrap, resulting in student projects such as classes, blog, and a sales website.
  • Taught Project Management Course using PMBOK guidelines to address all 10 areas of PMBOK 5.
  • Developed curriculum and delivered Software Development Course, including topics such as quality, testing, and methodologies.
  • Educated students in Java Concurrency / Multithreading & Java Socket.

Software Development Team Lead - German Tech Systems (2015 - 2018)

Software company providing business systems support, accounting, tax, and stock management.

  • Introduced improvements to the accounting/taxing software programs.
  • Reduced errors by 60% implementing changes to development/testing processes, including more efficient code review and internal communication procedures, such as compiling performance reporting from task management software presented to Company President.
  • Led meetings with Product Owner and Development Team.
  • Created courses on error handling, debugging, and clean code for team members, reducing 50% of bugs.
  • Improved response time by 50% based on skillful management of PostgreSQL database, adjusting memory and buffer parameters.
  • Managed Nginx application and servers on Amazon EC2, S3.
  • Contributed to renovation of company’s data center, installing and configuring VMware in new server machines and network devices.

Software Engineer - German Tech Systems (2014 - 2016)

  • Optimized tax and accounting software for greater efficiency.
  • Reduced required man-hours by 20 hours per week, developing new module to download / import documents from government website through SOAP Web-service.
  • Reduced ram memory requirements of tax calculation process (from 1.2GB to 200MB by expertly applying pipe processing model.
  • Enhanced system-user interface by reorganizing menus and providing additional feedback messages such as progress bars and error messages.

Software Engineer - Oderco (2014)

Computer equipment / electronics distributor.

  • Maximized security, permissions, maintenance, and performance by upgrading all internal support tools in conventional development model in PHP by CakePHP 1.3 framework, as well as Front-end Bootstrap 2.3.2 and jQuery that improved interface and usability in addition to maintenance and performance.

Software Engineer - Assis Gurgacz Foundation (2009 - 2012)

Institute of higher learning with 2,000 students.

  • Built, maintained, and updated website for the institution.
  • Created PHP software programs, such as Reserving, Event Controlling, and Evaluation Systems.
  • Developed multiple operations, using Debian, MySQL, Apache, and Postfix.

My GitHub