Gustaf Räntilä
Enterprise Architect at Roche
Stockholm, Stockholm County, Sweden
Summary
🤩
Rockstar🎓
Top SchoolGustaf Räntilä is an experienced engineer with 18 years building software systems across startups and large enterprises, currently working at Pit after architecture and developer roles at Roche, Spotify, Klarna and Northvolt. He blends deep systems knowledge—C++, Linux, database and network programming—with modern web stacks (TypeScript, React, Node), comfortably moving between low-level engineering and full-stack delivery. Calm under pressure and driven by craftsmanship, he treats software and design as ongoing practice rather than a finished credential, prioritizing trust and practical results. An active open-source contributor, he has contributed full-stack improvements to Backstage, helping make developer portals more configurable and resilient. His background includes an M.Sc. from KTH and a thesis stint at University of Tsukuba on high-performance computing, reflecting a long-standing interest in performance and architecture. Colleagues rely on him for tackling the toughest technical challenges and for generous, pragmatic mentorship.
18 years of coding experience
15 years of employment as a software developer
M.Sc. Electric Engineering, M.Sc. Electric Engineering at KTH Royal Institute of TechnologyM.Sc. Thesis High Performance Computer Systems, M.Sc. Thesis High Performance Computer Systems at University of Tsukuba
Swedish, English
Github Skills (18)
javascript10
typescript10
backstage10
front-end-development10
typescript-types10
portal10
developper10
typescripts10
react10
apidoc9
api9
graphql8
wordpress-graphql8
wpgraphql8
back-end-development8
Programming languages (9)
Github contributions (5)
backstage/backstage
Feb 2021 - Dec 2022
Backstage is an open framework for building developer portals
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:83 reviews, 132 commits, 36 PRs in 1 year 10 months
Contributions summary:Gustaf primarily contributed to the Backstage developer portal by implementing and modifying frontend and backend functionalities. Their work included enhancing the version bridge feature, making it inspectable and configurable. They also addressed bugs in the AlertDisplay component, ensuring it handles undefined error messages and updated core components. Furthermore, the user integrated fetch API support within the GraphiQL API setup and enhanced the Tech Insights plugin.
portalsinfrastructureopen-platformdxbackstage
grantila/haxec
Jun 2019 - Mar 2021
Wrap a Node.js spawn() or exec() with before/after handlers
Contributions:2 releases, 9 commits, 3 PRs in 1 year 8 months
execnode-jshandlerswrapnodejs
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