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sylvainkalache

2,129 karma · joined August 25, 2011

Head of AI Labs @ Rootly.com ▪ Former LinkedIn SRE, Former Holberton School co-founder
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sylvainkalache··on Ask HN: Who is hiring? (October 2026)
Rootly | https://rootly.com/ | design, engineering, GTM, sales | SF Bay, Toronto, APAC, Remote

On-call, incident response, and AI SRE. Trusted by leading companies like NVIDIA, Dropbox, Canva, Figma, and more.

Hiring across marketing, engineering, product, GTM, and sales https://rootly.com/careers

sylvainkalache··on Ask HN: Who is hiring? (September 2026)
Rootly | https://rootly.com/ | design, engineering, GTM, sales | SF Bay, Toronto, APAC

Rootly is an AI-native on-call and incident response. Modern Slack and MS Teams native incident management—from your first alert to retrospective. Trusted by 100s of leading companies including NVIDIA, Squarespace, Canva, Grammarly, Elastic, Tripadvisor, and Figma. Hiring across design, engineering, GTM, and sales https://rootly.com/careers#open-roles

sylvainkalache··on Why some US restaurants are banning tips
I am french, living in the US: yes, service is always included in France, but service is usually not that good. At least, definitely not as good as in the US.
sylvainkalache··on Ask HN: Who is hiring? (August 2026)
Rootly | https://rootly.com/| design, engineering, GTM, sales | SF Bay, Toronto, APAC

Rootly is an AI-native on-call and incident response. Modern Slack and MS Teams native incident management—from your first alert to retrospective. Trusted by 100s of leading companies including NVIDIA, Squarespace, Canva, Grammarly, Elastic, Tripadvisor, and Figma.

Hiring across design, engineering, GTM, and sales https://rootly.com/careers#open-roles

sylvainkalache··on Ask HN: Who is hiring? (June 2026)
Rootly | Design, Engineering, GTM, Legal, Product, Sales| Hybrid (Toronto), Remote (APAC) | Full-time

We provide an on-call, incident management, and AI SRE platform. We are used by companies like NVIDIA, LinkedIn, and Dropbox.

We are a YC S21 company with ~100 employees and are very fast-growing. We have 15+ open positions.

https://rootly.com/careers#open-roles

sylvainkalache··on The future of software engineering is SRE
If the future of software engineering is SRE, because GenAI is taking care of coding, a similar trend is coming for SRE-type work.

It's called AI SRE, and for now, it's mostly targeted at helping on-call engineers investigate and solve incidents. But of course, these agents can also be used proactively to improve reliability.

sylvainkalache··on Ask HN: What Are You Working On? (Nov 2025)
A tool that detects potential signs of overwork in incident responders, which could lead to burnout. To compute a per-responder risk score, it integrates with Rootly, PagerDuty, GitHub, and Slack.

We offer both a hosted version (https://oncallburnout.com/) and a self-hosted one (https://github.com/Rootly-AI-Labs/On-Call-Burnout-Detector).

sylvainkalache··on Ask HN: Why are most status pages delayed?
In my experience as a former SRE currently working for an incident management SaaS (Rootly).

Two main reasons: 1) The status page update is not automated. It takes time for the incident management process to go through all the steps and updating the status page is generally not the first one. It's often an overlooked one.

2) The company would rather not communicate that they are/were down, or they are not yet sure of the impact, and therefore don't yet have the correct information to share.

Of course, all modern incident platforms will offer tools to update your page super easily/in real-time. But tooling is generally not the main issue; it's process/information.

sylvainkalache··on Ask HN: What are you working on? (September 2025)
A burnout detector for SREs. The goal is to help teams identify incident responders who may be overworked/getting burned out.

We are looking at:

-Objective data: signals from incident management tools (Rootly/PagerDuty), GitHub, and Slack

-Self-reported data: asking the engineers how they feel via short survey

From this, we generate a CBI score (Copenhagen Burnout Inventory). We're still in beta, but we've received positive feedback from our beta testers, especially from manager of large and distributed orgs.

It's fully open-source, you can test it out locally https://github.com/Rootly-AI-Labs/rootly-burnout-detector-we...

Alternatively, we offer a hosted version with mock data, allowing you to play with it. https://www.oncallburnout.com/

If you have any feedback or ideas, shoot them my way :)

sylvainkalache··on Apple Photos app corrupts images
Same here. They have a known bugs where entries will vanish from your contacts. Data loss is a big deal (or so I thought).

Support asked me to let them know when a contact vanishing did so they could gather logs from me phone.

Once I was finally able to see it happen, I reached out. Reported that it had just happened overnight. The customer support said it was too long of a time frame for engineers to investigate because "it generates a lot of logs and that's too much to go through". I could not believe their answer.

I just moved my contacts to Gmail and that was the end of it.

sylvainkalache··on Scientists identify culprit behind biggest-ever U.S. honey bee die-off
I live in Florida. Both my neighbor and I lost our hive q few weeks apart. It happened very quickly and what the article mentioned is most likely what they got. We knew about the sharp die-off across the U.S. so decided to hold off bee keeping until it is figured out.
sylvainkalache··on Apple's Software Quality Crisis
I have experienced data loss with Apple and the support team telling me the knew about it but could not pinpoint the issue.

I had entries disappearing from my Contacts (iCloud). The customer support asked for me to get back when I notice the issue so they could get logs to debug. My best friend contact entry disappeared overnight. I called the representative the day of and told him that the contact disappeared between yesterday night and today morning. His answer was that I needed to pinpoint more accurately when the contact disappeared, because iPhone generates a lot of logs and and engineers don’t have time to go through them. Ah!

Needless to say I stopped storing my contacts with iCloud and my trust eroded. “Funny enough” I also had issues with my Health data, years of it disappeared. Support could not do anything. The data magically came back a month later or so.

sylvainkalache··on Ask HN: Who is hiring? (February 2025)
Rootly.com | Engineering, Marketing | HYBRID, REMOTE (NA,EU) | Toronto, London, SF

AI-powered on-call and incident response. Beautiful, modern, and Slack-native incident management—from your first alert to retrospective. Trusted by 100s of leading companies, including NVIDIA, Squarespace, Canva, Grammarly, Elastic, Tripadvisor, and Figma.

* Engineering Manager https://rootly.com/careers?4548382007?gh_jid=4548382007 * QA Engineer https://rootly.com/careers?4158205007?gh_jid=4158205007 * Security Engineer https://rootly.com/careers?4042814007?gh_jid=4042814007 * Senior Site Reliability Engineer https://rootly.com/careers?4016398007?gh_jid=4016398007 * Senior Software Engineer - Ruby on Rails https://rootly.com/careers?4015886007?gh_jid=4015886007 * Senior Developer Relations Advocate https://rootly.com/careers?4015888007?gh_jid=4015888007 * Content Marketing Specialist https://rootly.com/careers?4200866007?gh_jid=4200866007

The business is booming; it's the right time to join us.

sylvainkalache··on Beyond file trees: why AI coding assistants need smarter context
I would love to see the results; where will you share?
sylvainkalache··on The Financial Times and OpenAI strike content licensing deal
The publishing industry is in big trouble; journalists are fired, and publications are closing.

Ads are not enough, and readers are fed up with ads, so they use adblockers, cutting publications' revenues. With AI chatbots, people browse these publications even less, further reducing revenues.

Paywall and licensing content is the next best option, if not what it is?

sylvainkalache··on The Invisible $1.52T Problem: Clunky Old Software
https://archive.is/KpM75
sylvainkalache··on Zelle finally caves after years of refusing to refund scam victims
I hate Zelle; in South Florida, that's all the rage. No one wants to use Venmo or other more user-friendly apps.
sylvainkalache··on iCloud Drive silently deletes your content
I’ve got a similar issue with a loss of Contacts. I has been happening for a while but I first thought the issue was me.

However on a morning I realized the contact of a friend I was texting with the night before was gone. I realized the problem was iCloud.

I reach out to Apple support, and after exhausting all the dummy options, the customer support representative admitted that this was a known issue, but they could not find the root cause. And there was no solution to it.

The asked me to monitor my contacts so that I could find when this deletion happen but I would need to give a few minutes range. Because “an iPhone generates a lot of logs and engineers cannot go through them unless we can pinpoint where it exactly happened”.

I thought that pinpointed the bug within a 8 hours range was already good, but the customer’s representative insisted on being accurate within minutes (saying the engineers said that).

Anyway, as all the hard case that I give to Apple Support, the representative said he would follow-up and call me back but never did. So nothing happened.

I move my contacts to Google and just forgot about it.

sylvainkalache··on Enhancement of mosquito trapping efficiency using pulse width modulated LEDs
Living in South Florida and I found these 2 methods to be efficient:

-The propane burning traps about ten mosquitoes a day. It's an expensive setup. The SkeeterVac is $600, and a $20 propane tank will last a bit less than a month.

-"Mosquito Dunks" or more specifically, BTI (Bacillus Thuringiensis Israelensis) has to be placed into standing water. Mosquitoes come to lay eggs that will die because of the BTI. I don't know how many it kills, but I've seen a demi-dozen of larvae in there at a time. Here I recommend going with the granules format as the chemical is powerful, and you don't need much of it for example if placed in a bucket. Better than having to deal with breaking down a big piece into smaller ones.

sylvainkalache··on Nearly 10k more babies born in nine months under Texas’ abortion law
Seems like it

“Every baby saved from elective abortion should be celebrated,” said Texas Right to Life president John Seago. “This new study highlights the significant success of our movement in the last two years, while we look forward to helping the mothers and families of our state care for their children.”

sylvainkalache··on More students are turning away from college and toward apprenticeships
College was designed and mostly still is designed to give people a general education. When the society sees it as a pathway to become a professional.

While it does help, it is definitely not the best way to get a job.

As my former job, I founded a software engineering school that was very similar to what apprenticeships provide: hands-on learning. We did not have teachers, no lectures, students were learning by working on coding projects, very easy at the beginning, reaching industry standard by the end of the program.

And this type of methodology, coming from progressive education (Montessori is a spin of this) also works to become a life-long learner. In my opinion, actually way more efficient than traditional college.

Apprenticeship has this bad rep of being for blue collar jobs, I hope this will shift. So many of us in the tech industry have mostly learned on our own and on the job. I think we are the leaving proof that this type of program are extremely efficient.

sylvainkalache··on Ask HN: What is the best alternative to SVB for startups?
A good answer will depend on what "adequate" means here. I've been using Mercury for 2 years, while it is much smaller than SVB and does not offer as many services, I only have good things to say about them.
sylvainkalache··on FDIC Takes over Silicon Valley Bank
Speaking of Mercury, they recently announced increasing customers FDIC insurance maximum to $1M for customer accepting to enroll in their sweep program. Not sure SVB offers this but I hope they do.
sylvainkalache··on Swarm, a User-Friendly Alternative to Kubernetes
Kubernetes is obviously the big winner in the orchestration space but the complexity is also through the roof. Will the alternative path to use a managed-Kubernetes setup or go with simpler orchestration tools, such as Swarm?
sylvainkalache··on Almost everything on Amazon is becoming an ad
I would suggest adding Fakespot to your process. They analyze reviews and will spot the ones that are most likely fake, and then adjust the rating of the product accordingly.
sylvainkalache··on Show HN: SadServers – Test your Linux troubleshooting skills
Very cool project!

I was the founder of a school training software engineers, we had an infrastructure track that got a lot of our students to land SRE positions. When asking employers for feedback about our grads, one feedback kept coming: they lack experience when it comes to troubleshooting.

So I went on a quest to simulate that infra debugging while in an academic context.

I came up with the idea of giving students broken servers. I used Docker container and would setup a simple workload and mess it up with classic issues.

Needless to say students generally did not like it :) debugging isn’t fun. But it did help a lot.

sylvainkalache··on Apple Introduces Apple Watch Ultra
What I am the most excited about is the dive computer feature!

"along with recreational scuba diving to 40 meters with the new Oceanic+ app."

I was looking at $1,000 Garmin watches and was really not excited at buying one.

sylvainkalache··on Ask HN: Is there hope for a beginner without a degree in web dev today? (EU)
Indeed meetups and conferences are great to create connections. People in the tech industry are generally super friendly and eager to help. There are also a lot of initiative to help underrepresented demographics to enter the industry. Your partner fits the box.

At a school level, we would do this by having a network of mentors; industry-professional who are interested in coaching the next generation of software engineers. A lot of them would recommend students for interviews and internships. We would also have relations with companies and send resumés to them. Some companies were so eager to hire our students that they would interview any of those who wanted to apply.

sylvainkalache··on Ask HN: Is there hope for a beginner without a degree in web dev today? (EU)
I've ran a coding school for over 6 years so I know a lot about getting junior talent into the workforce.

Most companies don't care about what degree you have or don't have, what they care about is: 1) Do you have experience? 2) Do you have the skills?

For a profile like your partner, the hard part will be 1). Companies won't even want to offer her an interview because she has no experience, and it's not something she can get unless a company is willing to hire her. So how do you get out of this?

The solution I've seen work the best to solve this issue: her/your network. Y'all need to ask a friend/acquaintance at a company that is hiring to bypass that "do you have 2+ years exp" filter to interview her. And since it seem she has the 2) figured out, she might get the job.

sylvainkalache··on Pgo: The Postgres operator from crunchy data
In case some of you are interested in learning more about running databases on Kubernetes, or more generally stateful workloads, there is a community dedicated to that https://dok.community/

I a am part of the community team. We have weekly live streams/blog posts about the topic and a Slack channel.

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