Orleif Ericsson
System Developer at Skatteverket (Swedish Tax Agency)
Sweden
Summary
🤩
Rockstar🎓
Top SchoolOrleif Ericsson is a pragmatic system developer with over two decades of hands-on experience across testing, .NET web development and Java-based systems at Sweden’s Skatteverket. He blends a strong testing and quality assurance background (HP Quality Center, QTP) with practical software construction skills in C#, ASP.NET, IIS and MS SQL Server, and has built CMS solutions earlier in his career. At Skatteverket he transitioned from test manager to developing production Java solutions, demonstrating adaptability between QA and backend engineering. Orleif is also an active open-source contributor who has improved core parts of the Swift standard library—working on FlattenSequence, BinaryInteger methods and edge-case fixes like division-by-zero in Int128/UInt128—highlighting an attention to performance and correctness. Based in Sweden with a Fil. Mag. in Computer Science from Uppsala University, he combines analytical rigor with a dry sense of humor that surfaces in a GitHub bio that reads “I tried to be normal once.”
4 years of coding experience
3 years of employment as a software developer
Studentexamen, Naturvetenskaplig linje, Studentexamen, Naturvetenskaplig linje at Säveskolan VisbyFil. Mag., Computer science, Business Economics, Education, Fil. Mag., Computer science, Business Economics, Education at Uppsala University
Github Skills (11)
algorithm10
data-structures10
algorithms10
swift10
lib10
integer-arithmetic10
performance-optimization10
data-structure10
standard-library10
benchmarking9
benchmark9
Programming languages (2)
Github contributions (5)
swiftlang/swift
Jun 2023 - Dec 2024
The Swift Programming Language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 reviews, 16 PRs, 56 comments in 1 year 6 months
Contributions summary:Orleif primarily contributed to the Swift programming language's standard library, specifically focusing on enhancing the `FlattenSequence` implementation and refining `BinaryInteger` methods. Their work involved performance optimizations, bug fixes, and improvements to the `distance(from:to:)` function, with a strong emphasis on addressing potential trapping issues and improving overall efficiency. Additionally, the user created and integrated benchmarks to evaluate the performance impact of their changes. The user also made contributions to fix division-by-zero cases in `Int128` and `UInt128`.
swift-programmingswift-programming-languageprogramming-languageswift
oscbyspro/DiffableTextViews
Sep 2021 - Sep 2022
An open source package for as-you-type formatting in SwiftUI.
Contributions:48 releases, 2704 commits, 4 PRs in 11 months
textfieldswift-package-managerswiftiosas-you-type
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