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John Litborn

[email protected] | Linköping, Sweden

20+ programming side projects, 15 years linux experience, scored top 0.1% in Swedish SAT, participated in The Programming Olympiads and several other competitions.

Professional experience

Jul 2022- Freelance Software Developer Anthropic
Build open-source dev tooling requested by Anthropic. Wrote a Flake8 linter plugin for the Trio library in 4 weeks, that's already caught several bugs in deployed code.
Mar-Oct 2017 Software Engineer, test development Ericsson, HiQ
Uplift 4G base-station unit tests (Erlang) to work in a virtualized environment. Team member responsible for Git, Linux, Python & Shell scripts, and team pages on the internal wiki.
2013-2017 Amanuensis, Course assistant, Tool Developer Linköping University
Taught Python, C++, Ada, MATLAB, Git. Graded labs and exams. Developed internal tooling and standardized lab grading. Transitioned internal kiosk from a manual whiteboard system to splitwise, with supporting XScreenSaver and automated e-mails (C).
Summers of 2013&14 Course Developer, Engine&API development Linköping University
Got frustrated by a bad course and when giving feedback was offered a summer job to improve it.
2013: Overhauled assignments, documentation, instructions and maps. Minor bugfixes to the API. (Python, HTML)
2014: Major updates to the API as well as the netcode between client & server (Python, C).

Education

2009-2012 Upper Secondary School, Natural Science with extra math & programming. C#, database construction, discrete math. Grade average 19.5/20, top mark in 31/35 courses.
2012 Swedish SAT: 2.0/2.0 (top 0.1%)
2012-14, 2020-21 Computer Engineering, 120 Credits Linköping University. Grade Average 4.1/5

  • 80 credits in programming courses with a focus on algorithm construction, optimization, low-level code, and hardware. Python, C++, C, Java, Ada, VHDL, Prolog, Assembly, GNU MathProg, Microcode.
  • Major projects include: Mapping robot: Atmega1284p processors and multiple sensors (C), BIT.TRIP clone (VHDL), Liero clone (Java), XPilot AI (Python).
  • 40 credits in math courses; statistics, logic, discrete math.

2016 Swedish SAT: 1.9/2.0 (top 0.2%). Retook it for fun, competing with a friend.

Projects

When not otherwise noted, projects are written in Python.

Flake8-Trio [1,400 LoC, 3,500 LoC including tests]
Traverses the parsed Abstract Syntax Tree of python code written with the async concurrency library Trio library, warning about bad code practices. Available on PyPI.

Necro Score Bot [1,200 LoC]
240 Twitter followers, 13.2k tweets. In the last 3200 tweets (since july 2019): 2960 favorites, 270 retweets, 388 players of which 36 are tagged. Continuosly running since 2015, 6 github contributors.
Pulls leaderboard updates from Steam for Crypt of the Necrodancer, posting notable scores to Twitter and/or Discord. Tags registered players, and detects cheated or bugged scores notifying the developers.

Seat Exchange Bot [2,600 LoC] An implementation of a game from a Korean game show, The Genius. With 40 different commands it supports varying player counts, bots, simultaneous games, and permissions. Played several dozens of times on a personal discord server as well as IRL.

Merits

2014 MicroCode sorting competition as part of a university course. Placed 1st with an average runtime of 903.6 cycles, breaking the professors long-standing record of 948, and smashing the student record at the time. (>1100)
2011 Programming Olympiad, national qualifiers: 31st / 164 (in a 21-way tie)
2015 Nordic Collegiate Programming Contest: Formed a team with 2 work mates and placed 9th/22 (Team: "Ge Upp") at our university, 108th/355 across all universities.
2011 Kängurun, a swedish math competition: 9th / 155 in my division.
2015 IMPA. Local university competition for ambitious CompSci students. 10th/22 and 12th/22 during 2nd and 3rd round of 2015, solutions.
2016 Genikampen: National television reality game show. Extremely proud to get hand-picked out of hundreds of applicants. Trailer

2012 Ljungbergspriset: A 20.000 SEK (1950€) scholarship, one of three graduates at my school to get it.
2013 Mensa entrance test: IQ>=135 (top 1%).

Hobbies

Crypt of the NecroDancer Online Racing league (CoNDOR) moderator. Release and DLC playtester.
Dominion League moderator. Peak at top-200 on ladder, top-50 in the league. Winner of Dominion: Creative and Big Games 2. Best player in EA.
Oxygen Not Included custom map to mimic Minecrafts "Skyblock" mod.
Placed 1/13 in Genius Invitational, an Online Reality Game lasting 6 months, solvers and game ideas. Taught myself game theory and solved MonUnrail (a variant of Monorail, memorizing it's nimbers with Anki.

National level trombonist during school. Can identify ~all common swedish birds on sight and/or song, now learning insects. Love swing dancing, primarily Bugg, Fox and West Coast Swing - three podium placements in club competitions. Veg*n for 15 years. Took the Giving What We Can pledge in 2017. Types on fancy keyboards with fancy layouts. Prefer my house plants to be succulents and vines.

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