Staff 🛠 @MixMax - Author of "Serverless Applications with Node.js" @JSBelgrade & @MapMeetup co-organizer #WardleyMaps. AWS Serverless Hero, ex @Stedi

Joined December 2010
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Pinned Tweet
Super happy to announce that, we, the three Serverless musketeers (@gojkoadzic, @slobodan_ and me), are writing a new book “Real-time GraphQL applications with AppSync” :)
so, apparently this is happening :) serverless.pub/running-serve…
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Aleksandar Simovic retweeted
We were very early huh @simalexan
We want to hook it up to our conversational programming system on top of the AWS serverless ecosystem. Sent requests through the form, I will shoot you an email. Here is an early demo youtu.be/XMrtHQ6ohcg
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Aleksandar Simovic retweeted
I built a Claude Code notification system that uses Warcraft III Peon voice lines. It's probably the stupidest thing I've ever shipped. And according to everybody that has used it, it's also incredibly useful. (sound on)
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Aleksandar Simovic retweeted
Cowork but with local models not to send all your data to a remote cloud!
Jan 12
Replying to @claudeai
In Cowork, you give Claude access to a folder on your computer. Claude can then read, edit, or create files in that folder. Try it to create a spreadsheet from a pile of screenshots, or produce a first draft from scattered notes.
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Aleksandar Simovic retweeted
AWS Meetup Belgrade Dec 25 5:30 PM- join us at our in-person event at the end of this year. We will review the latest releases from AWS straight from Las Vegas re:invent that has just finished. It will be a friendly, open discussion on what's cool, what is boring and general direction AWS is going. Organizing this event for you: @simalexan @extraequal and @goranopacic meetup.com/awsugbelgrade/eve…
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Aleksandar Simovic retweeted
3 Dec 2025
This year's Now Go Build Award goes to Raphael Quisumbing @RaphaelFra20009—a true "renaissance developer." He builds communities, mentors others, and translates tech into real solutions. Kudos to all 265 AWS Heroes across 58 countries leading the way. Now, go build!
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Aleksandar Simovic retweeted
After almost 11 years, it's time for a new organization team to take over the @JSBelgrade meetup. The journey started in December 2014, when @ispijac_kafe and I decided to organize our first JavaScript meetup and start the first (as far as I know) JavaScript meetup group in Belgrade. Even in the first meetup, we met some awesome people who quickly became friends, including @simalexan (who also became our coorganizer), @dejan_dimic, and several others. Everything went smoothly until covid. We had many monthly meetups (with amazing speakers, the list would be too long), countless Coffeejs meetups, and some great free workshops. We met many awesome people. And, I personally learned a lot! However, after covid, many things changed, and with our limited free time, the meetup was no longer a priority. We organized a few events, just to keep it alive. And then, last year, @simalexan and I met Ilija. He just started the Belgradejs meetup group, and we recognized the enthusiasm and passion we had when we started the JS Belgrade meetup. In the next year and a half, Ilija and his coorganizers, Sanel and Nikola, organized many other great events. We even organized one together in April. Finally, a few months ago, @simalexan and I sat down with Ilija, Sanel, and Nikola and agreed to merge our meetup groups. They'll continue as the main JS Belgrade organizers, and we'll help with everything we can. I hope this marks the start of the next 10 years of JS Belgrade meetup, with many, many more events, workshops, and amazing people, of course. Btw, join us on Thursday to meet the new organizing team: meetup.com/js-belgrade-meetu… Also, if you want to speak at one of our future meetups, let us know!
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Aleksandar Simovic retweeted

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Last week I enabled @kirodotdev AI Steering to help with build vs buy decisions and use Wardley Maps principles when building products Showed a few gaps and how rules/steering evolution can potentially help with scaling principles across an organization simalexan.com/posts/wardley-…
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This is exactly what @swardley was talking about with “Conversational Programming”, two decades ago
Replying to @NathanLands
This slide shows the fundamental shift we're living through. Software 1.0: Write code by hand Software 2.0: Train neural networks Software 3.0: Talk to computers in English
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Aleksandar Simovic retweeted
14 Nov 2024
To mark #AWS Lambda's 10th anniversary, I'm sharing the internal PR/FAQ doc that launched it. It's a rare glimpse into the customer challenges we observed at the time and our vision for serverless computing back in the 2010s. Read it here: allthingsdistributed.com/202…
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Aleksandar Simovic retweeted
3 Nov 2024
The 1st Congress on Digital Medicine #CYBENCE2024 was a blast! Thank all enthusiasts for coming and see you next year for the second round #CYBENCE2025 #DigitalHealth
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Aleksandar Simovic retweeted
I'm super excited to finally announce AWS AppSync Events - a new feature that lets you easily build real-time experiences with WebSocket APIs! 🚀 No more worrying about WebSocket infrastructure or scaling. Just create your API and publish events.
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Aleksandar Simovic retweeted
🎉 Marking 10 Years of the #AWSHeroes Program! Recognizing the outstanding #AWS #ServerlessHeroes who have gone above & above to share their expertise & make a real difference in the community. 👉 Gojko Adzic 👉 Hazel Saenz 👉 Peter Sbarski 👉 Ivonne…

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Aleksandar Simovic retweeted
Replying to @sbarski
@sbarski @ivlo11 @austencollins @jeremy_daly @kperreault95 @EllerbyBen @metaskills @petehanssens @astuyve These heroes are work hard and inspire others to excel in their cloud journey: 👉 Aleksandar Simovic 👉 Kurt Lee 👉 Kyuhyun Byun 👉 Luca Bianchi

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Aleksandar Simovic retweeted
A very happy 5 years of ⁦@awscloud⁩ to the incredibly talented ⁦@julian_wood⁩!!! Here the much younger us shared a pint on his first Day 1🍻
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Aleksandar Simovic retweeted
Great time and wonderful, accomplished projects! Thank you @DavidDuncker and the whole #EHRA_ESC team
Farewell meeting of the #EHRA_ESC Digital and e-communication committee at #ESCCongress Very proud of this exceptional and successful team. Thankful for the last 2 years.
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Aleksandar Simovic retweeted
My upcoming book, Lizard Optimization, is now the #1 new release in Application Development on Amazon.com. Not bad for something that officially comes out on September 1st. Grab your copy at amazon.com/dp/B0DCGQWY7V
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Aleksandar Simovic retweeted
13 Aug 2024
To be clear: the hot take here is that we were able to switch between AWS primitives as our use case evolved. Kinesis has similarly low latency, but the way we used it meant we introduced unnecessary latency. More detail here: x.com/nickste/status/1823421…

13 Aug 2024
TIL the EventBridge team recently replaced kinesis with SQS internally, resulting in a substantial p50 improvement
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