Jakob Grumsen
Owner & Developer at Captino
Esbjerg, Region of Southern Denmark, Denmark
Summary
👤
Senior🎓
Top SchoolJakob Grumsen is a Denmark-based owner and developer with nine years of hands-on experience building native iOS apps, web applications, and APIs for clients through his company Grumsen Development ApS. He pairs practical business thinking with deep technical skills—Apple-certified hardware and macOS technician credentials underpin a rare combination of product-level development and systems troubleshooting. In 2023 he launched Captino, a no-code SaaS that turns marketing funnels into subscription products aimed at simplifying conversion for small businesses. Jakob also leads strategy and technical architecture work at ShadeSpace and runs investment activities via JWG Invest ApS, reflecting a blend of entrepreneurship and engineering. He is comfortable across the stack—from CI and SDK work in fintech to API integrations and performance marketing automation—and is constantly exploring new technologies to keep solutions scalable and user-focused.
9 years of coding experience
5 years of employment as a software developer
Computer Science Computer Programming, Computer Science Computer Programming at Erhvervsakademi SydVest (Business Academy South West)HHX Business economics Marketing English Danish, HHX Business economics Marketing English Danish at Esbjerg Handelsgymnasium
Danish, English
Stackoverflow
794reputation
88kreached
9answers
30questions
Github Skills (59)
vapor9
server9
server-side-swift9
server-side9
swift9
http-server8
http8
swift-nio8
authentication7
firebase7
database7
realm6
nodejs6
google-cloud-sql6
csharp6
Programming languages (5)
Github contributions (5)
Grumme/Clean-Swift-template
May 2018 - Nov 2021
Template for Clean Swift
Contributions:3 reviews, 8 commits, 6 PRs in 3 years 6 months
templateswiftcleanclean-swift
Grumme/Grumme
Apr 2022 - Jan 2023
Contributions:2 pushes, 1 branch in 8 months
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