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Lucas
Klassmann
Software Developer
I work as a Senior Software Engineer at Sheetgo on challenges related to performance, cost reduction, system design, and hard tasks that require deep research. I helped on designing the distributed system using tools like Google PubSub and also worked to organize the Backend projects allowing us to decouple them into independent services. My programming journey started in 2004 and since then I have worked with many stacks and languages. Currently, my work and projects use Python, Go, C, and Lua. Most recently I earned Associate Cloud Engineer and Professional Cloud Developer certifications from Google.
Some recent projects that I am proud of include:
- Implementing a new Public API with FastAPI and OpenAPI.
- Adding telemetry across the services, using Open Telemetry.
- Creating an application in Go for orchestrating the distributed services execution.
- A custom ODM framework in Python for MongoDB(supporting complex queries like Django).
- Creating a custom Query language(SQL-like using ANTLR4) parser and an engine to give support for filtering data that are not supported by Google Query Language.
- Many benchmarks and performance improvements for systems in Python and Go.
Latest Dev Logs
Some informal posts on programming and stuff that I find relevant.
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Skills
The years represent how much I feel comfortable with the technology. It is hard to measure, but I have more experience that the years listed here.
Python, which I love, and it is by far the most used language. I use it even to prototype for other stacks.
C is my passion, it is a language I never formally have a role in, but I use always for my own projects and is important to know when I go deep in the guts of a project.
Golang has been my companion for the last 6 years and Rust is the next target, but my experience goes far from this list, I have the experience even with stacks and languages that are obsolete today like Turbo C, Pascal, FoxPro, and Delphi 7.
Python12y
Django6y
Flask5y
Golang6y
Mongodb5y
Open-telemetry2y
Google PubSub3y
Pandas4y
ANTLR43y
Google Cloud Functions2y
C#6y
Distributed System5y
C8y
API Design5y
API Integration10y
System Design5y
Low-Level3y
Computer Architecture2y
System Performance4y
Linux13y
Kubernetes1y
Docker2y
Shell script4y
Lua3y
SDL23y
Unity3D3y
OAuth1y
Web Development12y
Rust1y
Lisp1y
Projects
Open-source projects and portfolio.
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Wars is a small game made with C, SDL 2, and Lua 5.3 to show Lua capabilities
/wars
c game game-development lua lua-script sdl2 c cmake lua -
HTTP Server in C for single Lua application with epoll support.
/http-lua
blog c example http http-server lua small-projects socket socket-programming c lua cmake -
Pull from Google PubSub and Push to a local endpoint
/pubsub-push
google-pubsub golang go cli tool http pubsub-push pubsub go makefile -
Extending your tools and apps with Lua scripts
/blog-embedding-lua-in-c
lua c embedded programming cmake blog c-examples lua-embedding cmake -
libnoise port to C#
/libnoise-csharp
noise noise-generator csharp libnoise port dotnet-core c# smalltalk -
Blogging with Python + Github + Flask + Markdown
/hublog
github flask python markdown blog blog-engine python html shell -
A Basic App in SDL2, Lua 5.3 and CMake
/sdl2-lua53-example
c sdl2 lua lua53 cmake boilerplate example starting-point cmake c lua -
Blog Post - Handling Binary Files in Go
/blog-handling-binary-files-go
go golang binary fileformat icns encoding-binary go -
Issues Command Line
/issues
go github command-line cli issues golang utility go -
CPF and CNPJ - Validation package in Go
/cpfcnpj
golang go cpf cnpj brazil validation golang-library go -
The Dungeon One - Ludum Dare #39
/ld39
unity3d ludum-dare-39 csharp indiegame c# shaderlab