Andreas Karlsson
Lead Backend Engineer at Toptracer
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolAndreas Karlsson is a Lead Backend Engineer and Developer Experience specialist with over 15 years of backend and infrastructure experience, now leading backend at Toptracer from Stockholm. He designs microservices, CI/CD pipelines, and developer-first tooling that reduce friction and let teams focus on application logic, with deep hands-on expertise in Python, Kubernetes, Docker and AWS. Andreas has a proven track record of improving code quality and maintainability—demonstrated by contributions to the widely used ariadne GraphQL library where he added snake_case conversion, type hints, and lint fixes. His career spans roles from startup co-founder and lead developer to senior backend and DevEx positions at Billogram, where he built shared libraries, boilerplates, and automation that saved engineers hours each week. He combines technical depth with an emphasis on enabling others, consistently turning infrastructure complexity into reliable, developer-friendly platforms.
10 years of coding experience
16 years of employment as a software developer
Master of Science (M.Sc.) Information Technology, Master of Science (M.Sc.) Information Technology at KTH Royal Institute of Technology
Swedish, English
Github Skills (7)
graphql10
pytest10
wordpress-graphql10
wpgraphql10
python10
api9
asgi8
Programming languages (3)
Github contributions (5)
mirumee/ariadne
Jul 2019 - Jul 2019
Python library for implementing GraphQL servers using schema-first approach.
Role in this project:
Backend Developer
Backend DeveloperContributions:11 commits, 1 PR, 5 comments in 1 day
Contributions summary:Andreas primarily focused on backend development tasks, specifically within the context of a GraphQL server implemented in Python. Their contributions include adding a decorator to convert kwargs to snake_case for function arguments, fixing linting issues, renaming function wrappers, and adding type hints. These changes demonstrate a focus on improving code quality, maintainability, and developer experience within the Ariadne library.
python-libraryapiasgipythonschema-first
smaaland/tomodachi
May 2017 - Jan 2023
Microservice framework using Python 3 asyncio with support for HTTP, RabbitMQ / AMQP and AWS SNS+SQS, etc.
Contributions:34 pushes, 10 branches in 5 years 9 months
pythonaws-snsasynciomicroservice-frameworkpython-3
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