Fränz Friederes
@fraenz.frieder.es
Solo Software Engineer at wierk.lu building a SaaS for DMARC monitoring dmarced.eu, deciphering Enigma cryptograms, and chasing sneaker drops, he/him 🏳️🌈
Pinned
Fränz Friederes
@fraenz.frieder.es
· Nov 16
I‘m a self-employed software engineer, mainly in the #Nodejs & #TypeScript world. Right now, I‘m building dmarced, an email monitoring SaaS working with #dns #aws #serverless. Follow me, if you want to hear from #dev topics like these ✨
Reposted by Fränz Friederes
We’re happy to see our two-person company featured in the first Luxembourg Cybersecurity #Startup Radar by Wavestone and the Luxembourg House of #Cybersecurity.
August 10, 2026 at 2:22 PM
We’re happy to see our two-person company featured in the first Luxembourg Cybersecurity #Startup Radar by Wavestone and the Luxembourg House of #Cybersecurity.
Reposted by Fränz Friederes
Hello, I hope you don’t mind my reaching out, this is Ben’s mum, Karen.
Ben allowed me access to his contacts and it’s lovely that you were in touch with him.
Sadly, after heroically standing up to the impact of cancer and 11 years of brutal treatments, our darling Ben passed away on 8th January
Ben allowed me access to his contacts and it’s lovely that you were in touch with him.
Sadly, after heroically standing up to the impact of cancer and 11 years of brutal treatments, our darling Ben passed away on 8th January
February 2, 2026 at 11:00 AM
Hello, I hope you don’t mind my reaching out, this is Ben’s mum, Karen.
Ben allowed me access to his contacts and it’s lovely that you were in touch with him.
Sadly, after heroically standing up to the impact of cancer and 11 years of brutal treatments, our darling Ben passed away on 8th January
Ben allowed me access to his contacts and it’s lovely that you were in touch with him.
Sadly, after heroically standing up to the impact of cancer and 11 years of brutal treatments, our darling Ben passed away on 8th January
Reposted by Fränz Friederes
Please share: I'm currently looking for an artist to do illustrations for Keila (Open Source newsletter tool). I'm looking for a cute, minimal style of vector illustrations. Not looking for AI stuff 🙏
Attached image is an example of the style I'm looking for.
#art #design #illustration #commission
Attached image is an example of the style I'm looking for.
#art #design #illustration #commission
March 11, 2026 at 11:28 AM
Please share: I'm currently looking for an artist to do illustrations for Keila (Open Source newsletter tool). I'm looking for a cute, minimal style of vector illustrations. Not looking for AI stuff 🙏
Attached image is an example of the style I'm looking for.
#art #design #illustration #commission
Attached image is an example of the style I'm looking for.
#art #design #illustration #commission
Reposted by Fränz Friederes
Here’s an update on our DMARC monitoring platform dmarced, focused on #EUSovereignty.
We explain:
- who operates dmarced
- where your data resides
- our current dependence on US infrastructure
- and where we’re headed next
dmarced.eu/en/learn/pl...
We explain:
- who operates dmarced
- where your data resides
- our current dependence on US infrastructure
- and where we’re headed next
dmarced.eu/en/learn/pl...
February 5, 2026 at 1:22 PM
Here’s an update on our DMARC monitoring platform dmarced, focused on #EUSovereignty.
We explain:
- who operates dmarced
- where your data resides
- our current dependence on US infrastructure
- and where we’re headed next
dmarced.eu/en/learn/pl...
We explain:
- who operates dmarced
- where your data resides
- our current dependence on US infrastructure
- and where we’re headed next
dmarced.eu/en/learn/pl...
Building an email monitoring SaaS, I need uncached, fresh DNS data using Node.js. Over time, I realize that the entire approach is flawed.
January 15, 2026 at 10:16 AM
Building an email monitoring SaaS, I need uncached, fresh DNS data using Node.js. Over time, I realize that the entire approach is flawed.
Reposted by Fränz Friederes
We’re going live!
Couldn’t make it to Stockholm? Don’t worry, you can still join #NordicJS from wherever you are.
Tune in to our livestream today and catch all the talks, inspiration, and JavaScript magic in real time.
👉 nordicjs.com/live
Couldn’t make it to Stockholm? Don’t worry, you can still join #NordicJS from wherever you are.
Tune in to our livestream today and catch all the talks, inspiration, and JavaScript magic in real time.
👉 nordicjs.com/live
October 2, 2025 at 5:55 AM
We’re going live!
Couldn’t make it to Stockholm? Don’t worry, you can still join #NordicJS from wherever you are.
Tune in to our livestream today and catch all the talks, inspiration, and JavaScript magic in real time.
👉 nordicjs.com/live
Couldn’t make it to Stockholm? Don’t worry, you can still join #NordicJS from wherever you are.
Tune in to our livestream today and catch all the talks, inspiration, and JavaScript magic in real time.
👉 nordicjs.com/live
Yes, #serverless still runs on servers.
The difference? They’re not mine to worry about.
The difference? They’re not mine to worry about.
July 14, 2025 at 5:48 PM
Yes, #serverless still runs on servers.
The difference? They’re not mine to worry about.
The difference? They’re not mine to worry about.
7,500 women helped end WWII at Bletchley Park. Pamela Downing was one of them. I wanted her name on the wall.
July 11, 2025 at 2:31 PM
7,500 women helped end WWII at Bletchley Park. Pamela Downing was one of them. I wanted her name on the wall.
Sequential IDs are faster. UUIDs are safer.
I wanted both speed and security, so I picked both.
I wanted both speed and security, so I picked both.
July 10, 2025 at 9:29 AM
Sequential IDs are faster. UUIDs are safer.
I wanted both speed and security, so I picked both.
I wanted both speed and security, so I picked both.
After a year of building my SaaS, I finally integrated Stripe for self-service subscriptions.
I almost overengineered billing before ever charging anyone.
I almost overengineered billing before ever charging anyone.
July 9, 2025 at 2:14 PM
After a year of building my SaaS, I finally integrated Stripe for self-service subscriptions.
I almost overengineered billing before ever charging anyone.
I almost overengineered billing before ever charging anyone.
My SaaS frontend, built on Next.js, never gets to see a session token.
No shared cookies, headers, or credentials.
Just a clean API boundary — on purpose.
No shared cookies, headers, or credentials.
Just a clean API boundary — on purpose.
July 8, 2025 at 9:57 AM
My SaaS frontend, built on Next.js, never gets to see a session token.
No shared cookies, headers, or credentials.
Just a clean API boundary — on purpose.
No shared cookies, headers, or credentials.
Just a clean API boundary — on purpose.
IP addresses are not for humans.
But DMARC reports are full of them, leaving users staring at logs instead of insights.
So I enrich them with metadata like country and network owner (ASN) from IPinfo's free dataset, without compromising privacy.
But DMARC reports are full of them, leaving users staring at logs instead of insights.
So I enrich them with metadata like country and network owner (ASN) from IPinfo's free dataset, without compromising privacy.
July 7, 2025 at 3:39 PM
IP addresses are not for humans.
But DMARC reports are full of them, leaving users staring at logs instead of insights.
So I enrich them with metadata like country and network owner (ASN) from IPinfo's free dataset, without compromising privacy.
But DMARC reports are full of them, leaving users staring at logs instead of insights.
So I enrich them with metadata like country and network owner (ASN) from IPinfo's free dataset, without compromising privacy.
Most of my incoming email traffic hits all at once: around midnight and noon. I needed a system that could absorb the spikes and survive broken code when I ship it.
Here’s the architecture I landed on.
Here’s the architecture I landed on.
July 4, 2025 at 9:15 AM
Most of my incoming email traffic hits all at once: around midnight and noon. I needed a system that could absorb the spikes and survive broken code when I ship it.
Here’s the architecture I landed on.
Here’s the architecture I landed on.
Just shipped a tiny feature that made a huge difference: sparklines.
These tiny charts now show trends in email volume inside each table cell: spikes, drops, and suspicious patterns.
At a glance, they say more than words and numbers ever could.
These tiny charts now show trends in email volume inside each table cell: spikes, drops, and suspicious patterns.
At a glance, they say more than words and numbers ever could.
July 3, 2025 at 9:58 AM
Just shipped a tiny feature that made a huge difference: sparklines.
These tiny charts now show trends in email volume inside each table cell: spikes, drops, and suspicious patterns.
At a glance, they say more than words and numbers ever could.
These tiny charts now show trends in email volume inside each table cell: spikes, drops, and suspicious patterns.
At a glance, they say more than words and numbers ever could.
Reposted by Fränz Friederes
Visibility matters—in encryption and in life. Never hide who you are. Happy #PrideMonth! 🌈 #Pride2025
June 1, 2025 at 12:15 AM
Visibility matters—in encryption and in life. Never hide who you are. Happy #PrideMonth! 🌈 #Pride2025
February 5, 2025 at 10:45 AM
Reposted by Fränz Friederes
So, I recently talked to a journalist about Stumbleupon and Cloudhiker. The interview is now part of an article on the BBC Website! 🤯🤩
www.bbc.com/future/artic...
www.bbc.com/future/artic...
'There was almost a utopian feeling to it': How StumbleUpon pioneered the way we use the internet
StumbleUpon, a tool that led users to random websites, had a stranglehold on millennials in the 2010s. Its influence echoes through everything we do online.
www.bbc.com
December 12, 2024 at 8:06 AM
So, I recently talked to a journalist about Stumbleupon and Cloudhiker. The interview is now part of an article on the BBC Website! 🤯🤩
www.bbc.com/future/artic...
www.bbc.com/future/artic...
Reposted by Fränz Friederes
WordPress must stop blocking WP Engine, judge rules
WordPress must stop blocking WP Engine, judge rules
A win for WP Engine.
buff.ly
December 10, 2024 at 11:50 PM
WordPress must stop blocking WP Engine, judge rules
What is 0? What is 10? The number of friends I likely am recommending them to? #feedback #emailtemplate
December 1, 2024 at 9:05 AM
What is 0? What is 10? The number of friends I likely am recommending them to? #feedback #emailtemplate
In today's dmarced refactor, I moved all messages to a separate #Monorepo package called "intl". It relies on Format.js while email rendering depends on react-email and react-intl. It's amazing that I can hand over i18n logic from non-React library code to TSX. #React #TypeScript #BuildInPublic
November 27, 2024 at 11:22 PM
In today's dmarced refactor, I moved all messages to a separate #Monorepo package called "intl". It relies on Format.js while email rendering depends on react-email and react-intl. It's amazing that I can hand over i18n logic from non-React library code to TSX. #React #TypeScript #BuildInPublic
Okay, I need to follow more people here, my feed is full of NY times 🥹
November 25, 2024 at 7:07 PM
Okay, I need to follow more people here, my feed is full of NY times 🥹