Karol Sójko
Senior Back-End Engineer at Proton
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolKarol Sójko is a Senior Back-End Engineer with 11 years of experience building and operating cloud-native systems, currently contributing to Proton after leading backend, DevOps and infrastructure at Standard Notes. He specializes in CI/CD and AWS-driven deployments (ECS/Fargate, Lambda, CodePipeline/CodeBuild) and has hands-on experience modernizing monoliths into microservices with TypeScript, Node.js and PHP. Karol pairs platform engineering with team enablement—coaching developers, setting up observability (Datadog, JSON logging) and automating reliable delivery pipelines. He also maintains production-grade deployments for prominent open-source projects like Standard Notes, where he implemented health checks and resolved Docker build issues. Author of “To-Do: Team!” and founder of Nuordo, he brings both entrepreneurial initiative and a pragmatic focus on maintainability and developer productivity.
11 years of coding experience
13 years of employment as a software developer
Master's Computer Science, Master's Computer Science at Gdańsk University Of Technology
English
Stackoverflow
711reputation
52kreached
11answers
14questions
Github Skills (15)
ruby-rails10
logging10
docker10
rails10
dockers10
devops9
json9
php6
user-roles6
symfony-form6
sonata-admin6
forum6
symfony6
fosuserbundle6
phpbb6
Programming languages (9)
Github contributions (5)
standardnotes/app
Jun 2020 - Jan 2023
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Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:11 reviews, 367 commits, 265 PRs in 2 years 8 months
Contributions summary:Karol's contributions primarily involve enhancing the application's infrastructure and maintaining server-side functionality. They implemented a health check endpoint, integrated datadog for monitoring and logging, and introduced JSON log formatting. Their work included merging hotfixes, fixing log formatting on production and resolving build issues related to Docker images, demonstrating expertise in deployment and maintenance.
securenotesend-to-endelectronnote-taking
standardnotes/auth
Jan 2021 - Jun 2022
Contributions:66 reviews, 760 commits, 180 PRs in 1 year 4 months
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