$50k/month comes out to $600k/year which is the cost around 2-3 engineers counting overhead.

To manage infrastructure at that scale themselves they'd need someone who knows DevOps. To write services at that scale they'd need someone who knows backend engineering and micro services. Then they'd need to be able to have 24/7 on call rotations for when things break. And of course, like any rewrite it seems like a "couple month" project until you get into the details and it becomes a two year project. Soon you've got a full 6+ person team and are paying them a lot more than $600k/year.

600k year for 2-3 is only real in the silicon valley bubble. You could get just as talented of a team from a Nordic Country for example and only pay 120kish

Realistically the costs for the company are higher. At least in The Netherlands the total costs for the employer is between 2-3x because of social security, health insurance, pension, housing/office costs.

I've been an employer in NL for close to 30 years and the 2-3x fully loaded is not supported by any data that I'm aware of. 1.5 or so is more like it.

Not even close to true. Especially when comparing California with EU countries, even high tax rate ones. The difference between net salary and what company pays is actually very similar.

I have experience with Belgium, the 2 - 3x ratio is only true when considering the net wage of the employee.

> 600k year for 2-3 is only real in the silicon valley bubble.

Nope. You're forgetting the cost to the company is the burdened labor cost (https://en.wikipedia.org/wiki/Labor_burden), not just wages. Payroll taxes, benefits, office space and equipment, etc. can add another 30-40% to the cost of wages.

Im not forgetting labor cost. I would actually say payroll tax, benefits and office space are even higher in California than any European country.

Can confirm. In fact, you can get talented people starting at 70k. Hire some remotes. Most local companies can only offer non-inspiring typical enterprise work, and that's why you can get people at such low cost.

600k a year gets you at least five good developers in Berlin.

And 10-12 in Poznan or Warsaw.

And some projects really are just simple. Scale makes no difference to their services, it's a basic OLTP + search with resizing image proxy.

This doesn't have any SLAs nor is it critical software either. 24/7 oncall is completely unnecessary.

Don‘t underestimate the massive cpu power needed for scaling images at their request rate

We run an ad platform that resizes, crops to the important section, transforms with text, and more with billions of requests per day. It's very cacheable, horizontally scalable, and CPU is cheap.

The main scaling challenge here is serving and bandwidth, both of which are handled by their CDN. I expect 5 figure costs for that but the rest of the platform is very expensive.

Wonder if they could use S3 bucket with a lambda to resize. I’m sure their images are a long tail so certain images likely have way more traffic than others. At a previous company where we were also doing a lot of imgix traffic we did something like this but with a go service but now I’d just offload to s3 and use lambda to avoid Devops..

I’ve done exactly this. But not at any scale. But if they are specializing in this and with low margins, AWS is not the answer. The compute cost would be relatively cheap and possibly even the storage cost. I would think that the bandwidth costs would be expensive.

A friend of mine runs a site which uses aws s3 and lambda resizing, but cache is via BunnyCDN. His costs are low after moving from aws cloudfront, and he’s serving ~400m images a day. (This is run by a company of 2 staff)

Just because everything is in AWS doesn’t force you to use all of AWS services.

Do you happen to have a link?

hey man, nice seeing you here.

Why would it depend on request rate rather than upload rate? Just pre-scale several variants on upload. Then run an MR job every now and then and delete the variants that haven't been touched for more than e.g. a month. Scale those on demand, store recents and frequently accessed pre-scaled. This is literally a few days of work.

It's much nicer to be able to resize on demand. Many CDNs and image/file hosting services offer transform abilities via URL which makes it easy to get exactly what you need and optimize for every site and device.

But since images are immutable, this is a perfect use-case for lambda functions fronted by a CDN.

I bet there's a very long tail, i.e. the majority of images are rarely accessed, if ever.

Maybe some caching would help.

I just had a look at your b2b site

Do you actually run pay-per-action campaigns, or do you provide a dashboard for the customer data ?

We started as a native ad network and have pivoted to B2B with our own proprietary B2B data, which then powers a platform to run campaigns for marketers, and intel for sales teams. We also have a legacy adnetwork business for publishers.

They say they spend $12,700/month on Fastly. I guess I don't know offhand the difference between Fastly and Imgix (which they also say is their CDN), but the levels of bandwidth they're talking about are not going to be free at Cloudflare.

We serve significantly more bandwidth and requests than their 2016 numbers at under $15k compared to their $17.5k, and we're not particularly lean on infra costs being a .Net shop with Win servers and MS SQL on Azure, and I can still bring our monthly a lot closer to $10k if I can find time for some projects.

But the reality is that even thousands of dollars per month saved can take a good while to ROI against the costs of development, or more so the opportunity costs.

> the levels of bandwidth they're talking about are not going to be free at Cloudflare

Correct. Cloudflare's terms state that you can't serve a disproportionate/substantial amount of non-HTML content, so they would need to sign up for Enterprise with a full contract to get image serving via CF.

Enterprise is generally $5k+/month, but CF contracts can offer a subset of enterprise features from $500-$5k/month, so I would guess ~3k/month just to serve multiple petabytes of images. This doesn't eliminate the bandwidth costs so CF may not be the single solution for the bandwidth costs.

They specifically say they use Imgix's CDN for the images, which can be confirmed by looking at the response headers.

Fastly is used for their actual website, judging by the ASN info. Meaning they wouldn't be serving petabytes of images from CloudFlare, just HTML/CSS/JS, which should be perfectly fine.

Resizing images in Golang is not as trivial as you might imagine at first. You need to be able to handle all sorts of formats and color spaces. You'd be surprised by the kind of weird garbage your users will upload. Then you need to use SIMD, not pure Golang solutions, or performance will suffer. So you end up adopting a wrapper around libvips or similar, at which point you will start to ponder if you should have stuck with C/C++ in the first place. (It all depends on how much of Go's features you use or if it's just a nicer, safer C for you.)