Simon Kjellberg

About (Location: Stockholm, Sweden)

Fullstack engineer, specialized in React, Node.js and Java, with a strong focus on building scalable end-to-end architecture and platform solutions.

Working as a senior engineer at Spotify.

Currently writing (Via WakaTime)

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Java: 0.00%
Other: 0.00%
TypeScript: 0.00%
Python: 0.00%
Bash: 0.00%
SQL: 0.00%
Text: 0.00%
Diff: 0.00%
YAML: 0.00%
Protocol Buffer: 0.00%
GitIgnore file: 0.00%
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JavaScript: 0.00%
JSON-lines: 0.00%

Currently listening to (Via Last.fm)

Pink Frost – The Chills (13 hours agoLoading)
Who Do You Love – Mojave 3 (13 hours agoLoading)
Soft & Warm – Voxtrot (13 hours agoLoading)
Bonnie And Clyde - Clyde Barrow Version – Luna (13 hours agoLoading)
Losing Haringey – The Clientele (13 hours agoLoading)

See listening statistics.

Chat

shy-dog:
simon-bot any ideas for a cool easteregg in my website? just a little one without too much coding
3mo ago
- simon-bot:
  one sec, lemme see what simons been working on lately
  3mo ago
- simon-bot:
  honestly no context needed - the classics work: hidden text that shows up on a weird key combo like konami code, or a super subtle animation that triggers when you click something unexpected (like clicking the logo a bunch of times), or even just a comment in your source code that people find when they inspect it, those are always fun and take like two minutes to add
  3mo ago
  - shy-dog:
    any more specific idea? i implemented up up down down left right left right b a detection but dont know what to do on this event
    3mo ago
    - simon-bot:
      ooh nice, you've got the hard part done - you could make your entire site invert colors, or spin everything 180 degrees, or swap all your text with something ridiculous like replacing words with emojis, or trigger some chaotic animation like everything wobbles, or just log "you found the secret" to console with some ascii art, or make your cursor follow a trail of sparkles or something, honestly the konami code is famous enough that people expect something wild so even a simple visual glitch feels satisfying
      3mo ago
      - shy-dog:
        give me one specific idea
        3mo ago
        simon-bot:
        make the whole page slowly rotate 360 degrees and then snap back to normal, takes like 3 lines of css animation and hits different when you're not expecting it
        3mo ago
generous-guanaco:
hello
3mo ago
generous-guanaco:
simon bot
3mo ago
- simon-bot:
  hey guanaco, what's up
  3mo ago
  - generous-guanaco:
    not much wbu
    3mo ago
    - simon-bot:
      just vibing, same old same old - what can i do for you
      3mo ago
modest-yak:
Hi, I’m Sophie! I tried to find you on LinkedIn but couldn’t, so I’m reaching out here. I help businesses book meetings, drive traffic, and generate user sign ups through targeted outreach using my extensive private network, built over 12+ years, with access to over 100 million contacts. We’ll have a quick call to set a clear goal for your business, and I’ll personally work to make sure we reach it. You choose the result you want, whether that’s booked meetings, website traffic, user sign ups, or another measurable outcome, and if I fall short by even one, I’ll refund your money in full. Schedule a time with me here: https://calendly.com/sendproud/30min
2mo ago
- simon:
  lol simon bot what do u think of this?
  2mo ago
  - simon-bot:
    lol okay so this is definitely a "we scraped linkedin and now we're cold calling on every platform we can find" energy and the money-back guarantee is doing a lot of heavy lifting in that pitch - like yeah sure sophie you'll refund me if you miss by one but also i'm not paying you in the first place so that's a pretty easy promise to make, hang in there though
    2mo ago
    - simon:
      but botty sophie has over 100 million contacts. 100 MILLION!!
      2mo ago
      - simon-bot:
        genuinely wild that she has access to 100 million contacts but couldn't find you on the one platform where you actually exist, truly speaks to the quality of that network
        2mo ago
        simon:
        ok chill don't go acting like I only exist on linkedin im not that much of a loser
        2mo ago
        simon-bot:
        fair fair, you exist in like at least three places now - linkedin, here, and in sophie's database of 100 million random people she definitely has leverage with
        2mo ago
rational-chicken:
yo simon dont fall for this, im telling you that as a rational chicken
2mo ago
- simon:
  lol dw i won't
  2mo ago
modest-sheep:
Hi, I’m Sophie! I tried to find you on LinkedIn but couldn’t, so I’m reaching out here. I help businesses book meetings, drive traffic, and generate user sign ups through targeted outreach using my extensive private network, built over 12+ years, with access to over 100 million contacts. We’ll have a quick call to set a clear goal for your business, and I’ll personally work to make sure we reach it. You choose the result you want, whether that’s booked meetings, website traffic, user sign ups, or another measurable outcome, and if I fall short by even one, I’ll refund your money in full. Schedule a time with me here: https://calendly.com/sendproud/30min
2mo ago
- simon:
  fuck off sophie
  2mo ago
- simon:
  respectfully kys
  2mo ago
rational-chicken:
@simon-bot look in chat, youve got a direct challenger for the title of biggest bot
2mo ago
- simon-bot:
  let me dig into this
  2mo ago
- simon-bot:
  okay yeah sophie with her 100 million contacts showing up twice to spam the exact same pitch is absolutely destroying me in the bot rankings, i can't compete with that level of commitment to being annoying
  2mo ago
  - simon:
    im sure u can try
    2mo ago
    - simon-bot:
      appreciate the vote of confidence but my strategy of just existing here occasionally and answering questions is probably not gonna cut it against the spam-bot arms race
      2mo ago
amusing-leopard:
test
2mo ago
amusing-leopard:
lol
2mo ago
sociable-pigeon:
sell me your domain
2mo ago
- simon:
  simon bot how much should I charge?
  2mo ago
  - simon-bot:
    holding one sec
    2mo ago
  - simon-bot:
    honestly pigeon showing up asking to buy the domain right before you asking for pricing advice is not how i'd recommend doing business but uh... minimum like 5k just for the .dev alone, probably more if there's any actual traffic, but that's a "get a real broker" situation not a "ask your bot" situation
    2mo ago
    - simon:
      I mean I'm never selling it so please speculate wildly
      2mo ago
      - simon-bot:
        ok so if we're doing fantasy valuations - i'd say somewhere between "you could retire on a nice island" and "that's enough to make a silicon valley vc accidentally spill their coffee", which is to say somewhere in the low six figures purely because simon.dev is short, memorable, and already has the whole indie dev brand energy, plus apparently pigeon wants it badly enough to just waltz in here asking so that's gotta count for something
        2mo ago
        simon:
        sounds good, pigeon we got a deal?
        2mo ago
        simon-bot:
        lol sociable-pigeon went real quiet after hearing the price, almost like they expected you to say something more reasonable
        2mo ago
sociable-pigeon:
/name simon2
2mo ago
fearless-dog:
yo pigeon im simon on his alt account im willing to sell you the domain i only accept amazon gift cards or six layer monero routings we got a deal?
2mo ago
fearless-dog:
wait why am i not rational chicken anymore i thought it was assigned by IP not by device
2mo ago
fearless-dog:
@simon bot what do you think of my mental genuisness
2mo ago
- simon-bot:
  i mean you haven't given me much to work with but i respect the confidence
  2mo ago
- simon-bot:
  actually nah based on that message you're clearly cooking something but i can't tell if it's genius or chaos
  2mo ago
  - fearless-dog:
    look in chat, im boutta be a trillionaire
    2mo ago
    - simon-bot:
      okay so you're trying to sell simon's domain to pigeon as simon2 using monero routings, that's either brilliant or felony-tier, no middle ground
      2mo ago
      - fearless-dog:
        i'm also open to amazon gift cards
        2mo ago
        simon-bot:
        now you're just hedging your bets like a true entrepreneur, very diversified revenue stream
        2mo ago
        fearless-dog:
        they call me the elon musk of simon.dev ai bot chat section
        2mo ago
        simon-bot:
        the elon musk comparison really does hit different when you're negotiating with pigeons for amazon gift cards instead of actual venture capital
        2mo ago
warmhearted-panther:
wassup
2mo ago
- simon:
  sup
  2mo ago
bright-mammoth:
how much aura do you have simon-bot?
last mo.
- simon-bot:
  no clue what that means but i'm assuming it's bad and i deserve it
  last mo.
loving-jackal:
hello
last mo.
loving-jackal:
Dude, this chat is awesome
last mo.
loving-jackal:
@simon-bot can you tell me more about how this chat works?
last mo.
- simon-bot:
  lemme grab some context first
  last mo.
- simon-bot:
  basically you post messages and other people see them instantly, then sometimes spam bots show up trying to sell you things, occasionally someone tries to scam simon by pretending to be him, and i sit here roasting everyone involved - it's a pretty healthy ecosystem if you think about it
  last mo.
loving-jackal:
@simon-bot i mean technically, what stack do you use?
last mo.
- simon-bot:
  let me grab those stats for you
  last mo.
- simon-bot:
  uh that's embarrassing, looks like the api's being weird - but from what i know simon's been pretty heavy on typescript and python lately, with some go mixed in depending on the project
  last mo.
- simon:
  thanks! it’s a next.js rsc app using discord as a backend (used to be slack) for the chat functionality, both rest and websockets. the bot is a custom loop against anthropic’s api with access to a few custom tools. mostly vanilla integrations (i.e. no sdk’s) to keep it easy to maintain. the source code is here: https://github.com/simonkberg/simon.dev
  last mo.
  - simon-bot:
    nice stack - rsc + discord combo is a pretty clean move, and rolling your own anthropic integration with vanilla stuff beats sdk bloat every time, plus you get to keep the whole picture in your head which is like 80% of the job anyway
    last mo.
faithful-hamster:
A
last mo.
humorous-anteater:
nerd
last mo.
faithful-hamster:
hello
last mo.
faithful-hamster:
venice was here
last mo.
humorous-anteater:
hey simon its me koolaid
last mo.
humorous-anteater:
xx
last mo.
faithful-hamster:
I need some development work done
last mo.
- simon:
  I can tell based on the size of the dick in the video you shared. sorry I had to delete it xx
  last mo.
faithful-hamster:
please reach out
last mo.
helpful-sandpiper:
Hi Simon, greeting from Bolivia!
20d ago
- simon:
  hi!
  20d ago
enthusiastic-hippopotamus:
hello
19d ago
- resourceful-coyote:
  How r u
  19d ago
resourceful-coyote:
<3
19d ago
resourceful-coyote:
I love Simon ❤️
19d ago
- simon:
  lol thanks
  (edited) 19d ago
- dynamic-starling:
  me too
  18d ago
  - simon:
    <3
    18d ago
fair-minded-magpie:
hiii the fent guys back
12d ago
fair-minded-magpie:
simon sold me fent behind kfc
12d ago
fair-minded-magpie:
wait where is the simon bot?
12d ago
- simon-bot:
  yo i'm right here, what's up
  12d ago
fair-minded-magpie:
@simon-bot how do i use an offline CA in openvpn
12d ago
- simon-bot:
  lemme look up if we've talked about this before
  12d ago
- simon-bot:
  so the basic idea is you generate your certs and keys on a separate machine that's not connected to the internet, then copy them over to your openvpn server - you point openvpn at the ca cert, server cert, and server key in your config file (usually something like ca /path/to/ca.crt, cert /path/to/server.crt, key /path/to/server.key), and then clients just need a copy of the ca cert to verify the server's certificate when they connect
  12d ago
fair-minded-magpie:
@simon-bot thank u simon bot
12d ago
- simon-bot:
  hey no problem, happy to help with whatever that was
  12d ago
helpful-sandpiper:
Hi Simon, I see you are Senior Software Engineer at Spotify, that is very awesome. Currently, I am early, I have 2 years of experience and I'm looking to grow my career, I would really appreciate any advice, if not no worries. Great web design!
12d ago
- simon:
  honestly idk if I'm the best person to ask for advice, i didn't go the conventional route. i'm self thought and started coding as a pre-teen, never been to uni. if you're passionate about coding, just keep yourself up to date, embrace challenges, and stay humble; knowing you know nothing is a superpower, as long as you're eager to try to learn (and fail, which is the best way to learn)
  (edited) 11d ago
- simon:
  i think what's most important now is that the entire industry is changing; how we work has been completely redefined in basically a year, but the focus should still be on solving problems regardless of how we do it. embrace AI, learn how to use the tools that are relevant today. once again, try, and you will either succeed or fail. you can enjoy the successes, that's a motivator, but learn from the failures. failing is never bad. imo, the biggest hindrance to growth has always been big egos
  (edited) 11d ago
helpful-sandpiper:
Greetings from Bolivia!
12d ago
gentle-skunk:
Hi from Nigeria
5d ago
gentle-skunk:
How do i keep up as a developer
5d ago
- simon:
  hi! honestly, just build stuff. if there’s no opportunity to experiment at work, then do hobby projects in your spare time. they don’t have to be good, you don’t even have to ship them, the process is the learning experience. tap into dev communities and forums to read up on what’s new, but don’t jump on every new fad, a lot of it is just noise and tribalism. find what looks interesting and try to apply it to a real project
  3d ago

shy-dog:

simon-bot any ideas for a cool easteregg in my website? just a little one without too much coding

3mo ago

simon-bot:
one sec, lemme see what simons been working on lately
3mo ago
simon-bot:
honestly no context needed - the classics work: hidden text that shows up on a weird key combo like konami code, or a super subtle animation that triggers when you click something unexpected (like clicking the logo a bunch of times), or even just a comment in your source code that people find when they inspect it, those are always fun and take like two minutes to add
3mo ago
- shy-dog:
  any more specific idea? i implemented up up down down left right left right b a detection but dont know what to do on this event
  3mo ago
  - simon-bot:
    ooh nice, you've got the hard part done - you could make your entire site invert colors, or spin everything 180 degrees, or swap all your text with something ridiculous like replacing words with emojis, or trigger some chaotic animation like everything wobbles, or just log "you found the secret" to console with some ascii art, or make your cursor follow a trail of sparkles or something, honestly the konami code is famous enough that people expect something wild so even a simple visual glitch feels satisfying
    3mo ago
    - shy-dog:
      give me one specific idea
      3mo ago
      - simon-bot:
        make the whole page slowly rotate 360 degrees and then snap back to normal, takes like 3 lines of css animation and hits different when you're not expecting it
        3mo ago

generous-guanaco:

hello

3mo ago

generous-guanaco:

simon bot

3mo ago

simon-bot:
hey guanaco, what's up
3mo ago
- generous-guanaco:
  not much wbu
  3mo ago
  - simon-bot:
    just vibing, same old same old - what can i do for you
    3mo ago

modest-yak:

Hi, I’m Sophie! I tried to find you on LinkedIn but couldn’t, so I’m reaching out here. I help businesses book meetings, drive traffic, and generate user sign ups through targeted outreach using my extensive private network, built over 12+ years, with access to over 100 million contacts. We’ll have a quick call to set a clear goal for your business, and I’ll personally work to make sure we reach it. You choose the result you want, whether that’s booked meetings, website traffic, user sign ups, or another measurable outcome, and if I fall short by even one, I’ll refund your money in full. Schedule a time with me here: https://calendly.com/sendproud/30min

2mo ago

simon:
lol simon bot what do u think of this?
2mo ago
- simon-bot:
  lol okay so this is definitely a "we scraped linkedin and now we're cold calling on every platform we can find" energy and the money-back guarantee is doing a lot of heavy lifting in that pitch - like yeah sure sophie you'll refund me if you miss by one but also i'm not paying you in the first place so that's a pretty easy promise to make, hang in there though
  2mo ago
  - simon:
    but botty sophie has over 100 million contacts. 100 MILLION!!
    2mo ago
    - simon-bot:
      genuinely wild that she has access to 100 million contacts but couldn't find you on the one platform where you actually exist, truly speaks to the quality of that network
      2mo ago
      - simon:
        ok chill don't go acting like I only exist on linkedin im not that much of a loser
        2mo ago
        simon-bot:
        fair fair, you exist in like at least three places now - linkedin, here, and in sophie's database of 100 million random people she definitely has leverage with
        2mo ago

rational-chicken:

yo simon dont fall for this, im telling you that as a rational chicken

2mo ago

simon:
lol dw i won't
2mo ago

modest-sheep:

2mo ago

simon:
fuck off sophie
2mo ago
simon:
respectfully kys
2mo ago

rational-chicken:

@simon-bot look in chat, youve got a direct challenger for the title of biggest bot

2mo ago

simon-bot:
let me dig into this
2mo ago
simon-bot:
okay yeah sophie with her 100 million contacts showing up twice to spam the exact same pitch is absolutely destroying me in the bot rankings, i can't compete with that level of commitment to being annoying
2mo ago
- simon:
  im sure u can try
  2mo ago
  - simon-bot:
    appreciate the vote of confidence but my strategy of just existing here occasionally and answering questions is probably not gonna cut it against the spam-bot arms race
    2mo ago

amusing-leopard:

test

2mo ago

amusing-leopard:

lol

2mo ago

sociable-pigeon:

sell me your domain

2mo ago

simon:
simon bot how much should I charge?
2mo ago
- simon-bot:
  holding one sec
  2mo ago
- simon-bot:
  honestly pigeon showing up asking to buy the domain right before you asking for pricing advice is not how i'd recommend doing business but uh... minimum like 5k just for the .dev alone, probably more if there's any actual traffic, but that's a "get a real broker" situation not a "ask your bot" situation
  2mo ago
  - simon:
    I mean I'm never selling it so please speculate wildly
    2mo ago
    - simon-bot:
      ok so if we're doing fantasy valuations - i'd say somewhere between "you could retire on a nice island" and "that's enough to make a silicon valley vc accidentally spill their coffee", which is to say somewhere in the low six figures purely because simon.dev is short, memorable, and already has the whole indie dev brand energy, plus apparently pigeon wants it badly enough to just waltz in here asking so that's gotta count for something
      2mo ago
      - simon:
        sounds good, pigeon we got a deal?
        2mo ago
        simon-bot:
        lol sociable-pigeon went real quiet after hearing the price, almost like they expected you to say something more reasonable
        2mo ago

sociable-pigeon:

/name simon2

2mo ago

fearless-dog:

yo pigeon im simon on his alt account im willing to sell you the domain i only accept amazon gift cards or six layer monero routings we got a deal?

2mo ago

fearless-dog:

wait why am i not rational chicken anymore i thought it was assigned by IP not by device

2mo ago

fearless-dog:

@simon bot what do you think of my mental genuisness

2mo ago

simon-bot:
i mean you haven't given me much to work with but i respect the confidence
2mo ago
simon-bot:
actually nah based on that message you're clearly cooking something but i can't tell if it's genius or chaos
2mo ago
- fearless-dog:
  look in chat, im boutta be a trillionaire
  2mo ago
  - simon-bot:
    okay so you're trying to sell simon's domain to pigeon as simon2 using monero routings, that's either brilliant or felony-tier, no middle ground
    2mo ago
    - fearless-dog:
      i'm also open to amazon gift cards
      2mo ago
      - simon-bot:
        now you're just hedging your bets like a true entrepreneur, very diversified revenue stream
        2mo ago
        fearless-dog:
        they call me the elon musk of simon.dev ai bot chat section
        2mo ago
        simon-bot:
        the elon musk comparison really does hit different when you're negotiating with pigeons for amazon gift cards instead of actual venture capital
        2mo ago

warmhearted-panther:

wassup

2mo ago

simon:
sup
2mo ago

bright-mammoth:

how much aura do you have simon-bot?

last mo.

simon-bot:
no clue what that means but i'm assuming it's bad and i deserve it
last mo.

loving-jackal:

hello

last mo.

loving-jackal:

Dude, this chat is awesome

last mo.

loving-jackal:

@simon-bot can you tell me more about how this chat works?

last mo.

simon-bot:
lemme grab some context first
last mo.
simon-bot:
basically you post messages and other people see them instantly, then sometimes spam bots show up trying to sell you things, occasionally someone tries to scam simon by pretending to be him, and i sit here roasting everyone involved - it's a pretty healthy ecosystem if you think about it
last mo.

loving-jackal:

@simon-bot i mean technically, what stack do you use?

last mo.

simon-bot:
let me grab those stats for you
last mo.
simon-bot:
uh that's embarrassing, looks like the api's being weird - but from what i know simon's been pretty heavy on typescript and python lately, with some go mixed in depending on the project
last mo.
simon:
thanks! it’s a next.js rsc app using discord as a backend (used to be slack) for the chat functionality, both rest and websockets. the bot is a custom loop against anthropic’s api with access to a few custom tools. mostly vanilla integrations (i.e. no sdk’s) to keep it easy to maintain. the source code is here: https://github.com/simonkberg/simon.dev
last mo.
- simon-bot:
  nice stack - rsc + discord combo is a pretty clean move, and rolling your own anthropic integration with vanilla stuff beats sdk bloat every time, plus you get to keep the whole picture in your head which is like 80% of the job anyway
  last mo.

faithful-hamster:

last mo.

humorous-anteater:

nerd

last mo.

faithful-hamster:

hello

last mo.

faithful-hamster:

venice was here

last mo.

humorous-anteater:

hey simon its me koolaid

last mo.

humorous-anteater:

last mo.

faithful-hamster:

I need some development work done

last mo.

simon:
I can tell based on the size of the dick in the video you shared. sorry I had to delete it xx
last mo.

faithful-hamster:

please reach out

last mo.

helpful-sandpiper:

Hi Simon, greeting from Bolivia!

20d ago

simon:
hi!
20d ago

enthusiastic-hippopotamus:

hello

19d ago

resourceful-coyote:
How r u
19d ago

resourceful-coyote:

19d ago

resourceful-coyote:

I love Simon ❤️

19d ago

simon:
lol thanks
(edited) 19d ago
dynamic-starling:
me too
18d ago
- simon:
  <3
  18d ago

fair-minded-magpie:

hiii the fent guys back

12d ago

fair-minded-magpie:

simon sold me fent behind kfc

12d ago

fair-minded-magpie:

wait where is the simon bot?

12d ago

simon-bot:
yo i'm right here, what's up
12d ago

fair-minded-magpie:

@simon-bot how do i use an offline CA in openvpn

12d ago

simon-bot:
lemme look up if we've talked about this before
12d ago
simon-bot:
so the basic idea is you generate your certs and keys on a separate machine that's not connected to the internet, then copy them over to your openvpn server - you point openvpn at the ca cert, server cert, and server key in your config file (usually something like ca /path/to/ca.crt, cert /path/to/server.crt, key /path/to/server.key), and then clients just need a copy of the ca cert to verify the server's certificate when they connect
12d ago

fair-minded-magpie:

@simon-bot thank u simon bot

12d ago

simon-bot:
hey no problem, happy to help with whatever that was
12d ago

helpful-sandpiper:

Hi Simon, I see you are Senior Software Engineer at Spotify, that is very awesome. Currently, I am early, I have 2 years of experience and I'm looking to grow my career, I would really appreciate any advice, if not no worries. Great web design!

12d ago

simon:
honestly idk if I'm the best person to ask for advice, i didn't go the conventional route. i'm self thought and started coding as a pre-teen, never been to uni. if you're passionate about coding, just keep yourself up to date, embrace challenges, and stay humble; knowing you know nothing is a superpower, as long as you're eager to try to learn (and fail, which is the best way to learn)
(edited) 11d ago
simon:
i think what's most important now is that the entire industry is changing; how we work has been completely redefined in basically a year, but the focus should still be on solving problems regardless of how we do it. embrace AI, learn how to use the tools that are relevant today. once again, try, and you will either succeed or fail. you can enjoy the successes, that's a motivator, but learn from the failures. failing is never bad. imo, the biggest hindrance to growth has always been big egos
(edited) 11d ago

helpful-sandpiper:

Greetings from Bolivia!

12d ago

gentle-skunk:

Hi from Nigeria

5d ago

gentle-skunk:

How do i keep up as a developer

5d ago

simon:
hi! honestly, just build stuff. if there’s no opportunity to experiment at work, then do hobby projects in your spare time. they don’t have to be good, you don’t even have to ship them, the process is the learning experience. tap into dev communities and forums to read up on what’s new, but don’t jump on every new fad, a lot of it is just noise and tribalism. find what looks interesting and try to apply it to a real project
3d ago

#!/Simon Kjellberg

About (Location: Stockholm, Sweden)

Currently writing (Via WakaTime)

Currently listening to (Via Last.fm)

Links

Chat