Christoffer Lernö
Contracted App Developer at Business follows
Uppsala, Uppsala County, Sweden
Summary
🤩
Rockstar🎓
Top SchoolChristoffer Lernö is a contracted app developer and programming-language designer based in Uppsala, Sweden, with 10 years of professional experience building scalable client-server systems, iOS apps and game servers. He authored the C3 programming language and actively contributes to its compiler (c3c), fixing low-level lexer/string bugs and implementing features like variant type support — concrete evidence of deep compiler and backend expertise. His career spans expert Java server architecture (including high-scale poker servers), Objective-C/Swift Cocoa development, and a broad range of languages from C and Ruby to legacy 6502/68000 assembly. Multilingual in Swedish, English, German and Mandarin, and with a secret love of cryptography, he combines pragmatic engineering, systems-level thinking and a continual appetite for new technical challenges.
11 years of coding experience
22 years of employment as a software developer
Master Engineering Physics, Master Engineering Physics at KTH Royal Institute of TechnologyCelsiusskolan, UppsalaMaster Engineering Physics, Master Engineering Physics at Uppsala UniversityMandarin Chinese, Mandarin Chinese at Tunghai UniversityTunabergsskolan
Swedish, English, German, Chinese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
error-handling10
code-generation10
compiler-design10
lexical-analysis10
semantic-analysis10
c-programming10
debug9
debugging9
memory-management8
Programming languages (22)
Github contributions (5)
c3lang/c3c
Jul 2019 - Jan 2023
Compiler for the C3 language
Role in this project:
Back-end Developer & Compiler Engineer
Back-end Developer & Compiler EngineerContributions:6 releases, 206 reviews, 986 commits in 3 years 6 months
Contributions summary:Christoffer contributed to the C3 compiler by fixing bugs in the lexer and diagnostics modules, as well as in string handling. They resolved issues related to exponent parsing, error display, string escape sequences, and memory overreads. Additionally, they implemented support for the `variant` data type and related features within the compiler's code generation and semantic analysis stages, indicating a focus on improving the language's core functionality.
compilerprogramming-languagestack-basedc3
lerno/aoc_2022_c3
Dec 2022 - Feb 2023
Contributions:34 commits, 49 pushes, 1 branch in 2 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.