News for hackers. Stuff that matters.

EmielMols

Re:Claude can now create and edit files on Wednesday September 10, 2025 @01:02AM (#45193496)
Whitelisting these hosts mean they become extraction vectors for prompt manipulation. In fact it’s mentioned in the grant parent’s article at the end. So yes, it takes a while to do this right.
Re:Ask HN: Who is hiring? (August 2022) on Monday August 01, 2022 @11:33AM (#32307500)
Crisp | Software engineer | Full-time | ONSITE | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands and Belgium. We believe real fresh grocery shopping should be better and easier. We are a serious scale-up (total headcount ~180), where the close-knit tech/product team (20) builds our app, warehouse and internal tools.

We are looking for software engineers that like to work directly with their colleagues in other disciplines such as warehouse operations, retail commerce or app user experience. An ideal candidate has a background in computer science, a healthy disregard for red tape and excellent communication skills. Our stack is no-nonsense (using technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/fullstack-developer-1

Re:Ask HN: Who is hiring? (November 2021) on Monday November 01, 2021 @05:15PM (#29073199)
Crisp | Software engineer | Full-time | ONSITE | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. Launched in 2018 we are here to stay: backed by excellent investors we are currently scaling up.

We are looking for software engineers that like to work directly with their colleagues in other disciplines such as warehouse operations, retail commerce or app user experience. An ideal candidate has a background in computer science, a healthy disregard for red tape and excellent communication skills. Our stack is no-nonsense (using technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/fullstack-developer-1

They probably mean some access to production servers where it might be scanned in memory or otherwise grabbed using debug tooling. Making this possible for 0 people will be challenging and at the least add a lot of complexity.
Re:Ask HN: Who is hiring? (June 2021) on Wednesday June 02, 2021 @05:46AM (#27366753)
Crisp | Software engineer | Full-time | ONSITE | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. Launched in 2018 we are here to stay: backed by excellent investors we are currently scaling up.

We are looking for software engineers that like to work directly with their colleagues in other disciplines such as warehouse operations, retail commerce or app user experience. An ideal candidate has a background in computer science, a healthy disregard for red tape and excellent communication skills.

Our stack is no-nonsense (using technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/fullstack-developer-1

Haha, this is hilarious in a very sad way. Can only imagine how the internal conversation about such an implementation went :).
True, but you do want to test the emergent control system.
Re:Ask HN: Who is hiring? (March 2021) on Monday March 01, 2021 @04:58PM (#26309014)
Crisp | Software engineer | Full-time | ONSITE | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. Launched in 2018 we are here to stay: backed by excellent investors we are currently scaling up.

You are a software engineer willing to join our tech team as 9th developer. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/fullstack-developer-1/nl

Re:Ask HN: Who is hiring? (February 2021) on Thursday February 11, 2021 @08:00PM (#26109657)
Crisp | Software engineer | Full-time | ONSITE | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. Launched in 2018 we are here to stay: backed by excellent investors we are currently scaling up.

You are a software engineer willing to join our small (~8) tech working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/fullstack-developer-1/nl

Re:That XOR Trick (2020) on Monday January 18, 2021 @02:56PM (#25825871)
Ha, very nice!

To clarify: to reverse the list, one would only have to swap the HEAD and TAIL pointers of the base structure.

Re:Three bugs in the Go MySQL driver on Thursday May 21, 2020 @06:45AM (#23256860)
The work-around for the first issue might work well in practice, but due to asymmetry of tcp streams, is still open for a race where the server will idle-close a connection while a new (non-idempotent!) query is just in-flight.

The correcter solution would let the client manage the idle-timeout and disconnect once reached. Depending a bit on how controlled the client is, this might be a good or bad idea.

Note that this problem is very generalizable to http (1) upstream servers. If you need to support non-idempotent requests and want persistent connections to your upstream, it's not a good idea to have the upstream manage the idle timeout (and disconnect if reached).

In practice, I would have the client manage an idle-timeout of 30s, and server of 40s as an extra protection against misbehaving clients.

Re:Ask HN: Production Prolog in 2020? on Tuesday May 19, 2020 @11:31AM (#23235948)
In my experience, "logic wants to be code, and not data". Ie it's a dangerous (although sometimes necessary) step to move this into the data domain. Did you encounter any difficulties with missing source control, being able to use debugging tools, etc?
Re:Is the Cloud Recession-Proof? on Sunday May 03, 2020 @04:40PM (#23061690)
For those wondering as well, at 10b quarterly revenue, 10m monthly is ~.3% of all AWS revenue.
Re:SELECT wat FROM sql on Monday April 27, 2020 @04:55AM (#22994127)
It's fairly nice but indeed rather implicit. I would kill for a postgres setting where feeding (an evaluated) NULL to the where clause logs a warning. This would force developers to coalesce (at least on top level) and think about the null case when applicable.
Re:Ask HN: Who is hiring? (January 2020) on Saturday January 04, 2020 @05:40AM (#21954135)
Not for the internship position unfortunately
Re:Ask HN: Who is hiring? (January 2020) on Thursday January 02, 2020 @12:29PM (#21937461)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched a year ago, and have since raised a successful Series A. You are a software engineer willing to join our small team working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (December 2019) on Monday December 02, 2019 @05:28PM (#21687761)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched a year ago, and have since raised a successful Series A. You are a software engineer willing to join our small team working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (November 2019) on Friday November 01, 2019 @05:58PM (#21424126)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched less than a year ago, and have since raised a successful Series A. You are a software engineer willing to join our small team working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (October 2019) on Tuesday October 01, 2019 @01:44PM (#21128317)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched less than a year ago, and have since raised a successful Series A. You are a software engineer willing to join our small team working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (September 2019) on Tuesday September 03, 2019 @05:57PM (#20871636)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched less than a year ago, and have since raised a successful Series A. You are a software engineer willing to join our small team working from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (August 2019) on Thursday August 01, 2019 @06:08PM (#20588840)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched less than a year ago, and have since raised a successful Series A.

You are a junior software engineer willing to join our small team working (mainly) from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Re:Ask HN: Who is hiring? (July 2019) on Monday July 01, 2019 @02:44PM (#20328419)
Crisp | Software engineer | Full-time | Onsite | Amsterdam, the Netherlands

Crisp is building a new online supermarket in the Netherlands. We believe real fresh grocery shopping should be better and easier. We launched less than a year ago, and have since raised a successful Series A.

You are a software engineer willing to join our small team working (mainly) from Amsterdam. You're eager to learn and work with colleagues from different disciplines such as warehouse operations, category management or product design.

Our stack is no-nonsense (using sophisticated technologies such as grep, strace and make), with backend code in golang/php and frontends around react (native). We prefer generalists over specialists, and willingness to learn over a long CV.

Reach me directly at emiel%crisp.nl. Please include a CV or linkedin profile. All messages will be answered. Our recruitment process includes a 30 minute tech test we ask you to do at home.

Vacancy page: https://crisp.jobs/developer/en

(intern positions available as well: https://crisp.jobs/developer-stage/en)

Hey HN,

This is a long-time side project of mine. After a few earlier (re)launches, I came back to it a couple of weeks ago. I now feel the concept is so simple, can't be long before it takes off ;)

No seriously, a lag-free & encrypted postgres replica as PITR backup that Just Works is something I've never found and has become something of a personal itch.

Very curious about your feedback

I have no specific experience with carbon but in almost (arguably) similar cases I've come across as a developer, I've found a better approach to look for a mechanism to allow for granular upgrades over time.

In this specific case I could imagine supporting both carbon and cocoa screens / logic at the same time, and begin conversion screen-by-screen or feature-by-feature.

In the end this might mean maintaining extra complexity to support both technologies, but protects you from the danger of having to implement a complet syst m to feature parity at once.

Re:Start with a Website, Not a Mobile App on Friday January 04, 2019 @01:18PM (#18826285)
Yes, window.navigator.standalone
Re:Ask HN: Who is hiring? (December 2018) on Tuesday December 04, 2018 @02:08AM (#18597038)
Crisp | Software engineer | Full-time, Onsite | Amsterdam, the Netherlands

Crisp (just launched publicly) is building a new business in food online. We believe real fresh grocery shopping should be better and easier.

We're a fully funded start-up, backed by high-profile investors, operating on the edge of technology, business and food. Our team consists of seasoned managers, top coders and food specialists from places such as Rocket Internet, Spotify, CoolBlue, McKinsey & Co, Ahold, Marqt.

You are a software engineer willing to join as one of the first in our team working (mainly) from Amsterdam. You get to work on a great new consumer product from scratch with the ability to reach a huge audience.

Please send inquires / resumes / linkedin to emiel%crisp.nl. All messages will be answered (if you're not a recruiter).

No visa sponsorships at this time, sorry. EU citizens welcome to apply of course

Landing page @ https://crisp.nl (in Dutch)

Vacancy page @ https://crisp.jobs

Re:Ask HN: Who is hiring? (September 2018) on Monday September 03, 2018 @04:31PM (#17904727)
Crisp | Software engineer | Full-time, Onsite | Amsterdam, the Netherlands

Crisp is building a new business in food online. We believe real fresh grocery shopping should be better and easier.

We're a fully funded start-up, backed by high-profile investors, operating on the edge of technology, business and food. Our team consists of seasoned managers, top coders and food specialists from places such as Rocket Internet, Spotify, CoolBlue, McKinsey & Co, Ahold, Marqt.

You are a software engineer willing to join as one of the first in our team working (mainly) from Amsterdam. You get to work on a great new consumer product from scratch with the ability to reach a huge audience.

Please send inquires / resumes / linkedin to emiel%crisp.nl. All messages will be answered (if you're not a recruiter).

No visa sponsorships at this time, sorry. EU citizens welcome to apply of course.

Re:Ask HN: Who is hiring? (April 2018) on Monday April 02, 2018 @03:15PM (#16738161)
Fresh food ventures | Product manager, UI/UX expert, Software engineer | Full-time, Onsite | Amsterdam, the Netherlands

We are building a new venture in online food retail, giving people access to better, fresher food at greater convenience. Our founding team has stellar experience in e-commerce/food/tech and recently raised significant funding.

You are a (senior) product manager or ui/ux expert expert willing to join as one of the very first in our team working (mainly) from Amsterdam. You get to work on a great new consumer product from scratch with the ability to reach a huge audience.

Please send inquires / resumes / linkedin to emiel%freshfoodventures.nl. All messages will be answered (if you're not a recruiter).

This is factually incorrect. There are rules regarding the bidding process for buying a property in the Netherlands (Amsterdam model, Haarlem model or closed bidding with deadline), but none of them include a part where the second highest price is used.

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