Per Cederberg
Software Developer at Hi3G Access AB
Stockholm, Stockholm County, Sweden
Summary
👤
Senior🎓
Top SchoolPer Cederberg is a Technical Lead and seasoned software engineer with 22 years of experience building integrated systems across embedded, web and backend domains. Based in Stockholm, he combines deep hands-on skills in JavaScript, Java, C and SQL with a systems-minded focus on usability and robust integrations, often simplifying complex flows into practical tools. As an owner-consultant he has delivered solutions from IoT firmware improvements (notably refactoring an ESP8266 Arduino library) to scalable web platforms and provisioning tools, and has a track record of improving code clarity and persistence features in popular JavaScript libraries. His background in both academic disciplines (MSc in Computer Science plus studies in philosophy and psychology) and long-term consulting gives him a rare blend of technical rigor and human-centered design.
22 years of coding experience
11 years of employment as a software developer
MSc, Computer Science, MSc, Computer Science at KTHPhilosophy, Philosophy at Stockholm University
Swedish, English, Spanish
Stackoverflow
356reputation
40kreached
3answers
0questions
Github Skills (18)
javascript10
c-language10
esp826610
lit10
sys10
embedded10
logging10
serial-communication10
cprogramming-language10
arduino10
localstorage9
iot9
testing8
nginx6
oid6
Programming languages (14)
Github contributions (5)
ekstrand/ESP8266wifi
Mar 2015 - Feb 2018
ESP8266 Arduino library with built in reconnect functionality
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:14 commits, 8 PRs, 3 pushes in 2 years 11 months
Contributions summary:Per primarily refactored and improved the `ESP8266wifi` Arduino library. They focused on optimizing code by replacing string searching with a new `readCommand()` method, reducing global buffer usage and introducing stack-based buffers. Furthermore, they added and refactored methods like `writeCommand()` and `readBuffer()` to streamline interactions with the ESP8266 module. These changes enhanced the library's functionality and readability.
esp8266-arduinoreconnectarduino-libraryesp8266arduino
pimterry/loglevel
Oct 2014 - Oct 2014
:ledger: Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:5 commits in 7 days
Contributions summary:Per primarily focused on improving the `loglevel` JavaScript library. They refactored core functionalities like `setLogLevel()` and the underlying logging methods, making them more efficient and robust. They also implemented features for persisting log levels using `localStorage` and cookies, enhancing the library's usability. Furthermore, the user simplified the code by leveraging helper functions and refactoring the approach to logger function setup.
stack-tracesconsoleloggerwinstonjavascript
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