Darryl Walker

Interests in SaaS, AI & Machine Learning. Currently BizDev @Avalara. Formerly Customer Loyalty @sas VC @ GE Equity, consultant @deloittemonitor and @accenture.

[Darryl Walker @darrylw]

via @NYTimes https://t.co/YLcpUERkG0

[Darryl Walker @darrylw]

Indulge your inner nerd with these 8 books on innovation https://t.co/rGgh72tgQl via @McKinsey

[Darryl Walker @darrylw]

How to develop an intrapreneurial culture https://t.co/McZ3ZVOzNG

[Darryl Walker @darrylw]

Avoiding blind spots in your next joint venture https://t.co/kuD2g8DDs9 via @McKinsey

[Arjun Mahadevan (Mr. LLC 🇺🇸) @ArjunMahadevan]

She started a dating app called Bumble in 2014 that let women make the first move and became the youngest self-made billionaire in the world.

Nearly 9 years and countless Bumble weddings and babies later, she's celebrated over 1.5 billion first moves.

Here are 4 pieces of advice from the queen of dating, Whitney Wolfe Herd:

1. 𝘐 𝘳𝘦𝘢𝘭𝘭𝘺 𝘵𝘳𝘺 𝘵𝘰 𝘢𝘴𝘬 𝘮𝘺𝘴𝘦𝘭𝘧 𝘵𝘩𝘦 𝘲𝘶𝘦𝘴𝘵𝘪𝘰𝘯 𝘰𝘧 𝘯𝘪𝘯𝘦. 𝘞𝘪𝘭𝘭 𝘵𝘩𝘪𝘴 𝘮𝘢𝘵𝘵𝘦𝘳 𝘪𝘯 𝘯𝘪𝘯𝘦 𝘮𝘪𝘯𝘶𝘵𝘦𝘴, 𝘯𝘪𝘯𝘦 𝘩𝘰𝘶𝘳𝘴, 𝘯𝘪𝘯𝘦 𝘥𝘢𝘺𝘴, 𝘯𝘪𝘯𝘦 𝘸𝘦𝘦𝘬𝘴, 𝘯𝘪𝘯𝘦 𝘮𝘰𝘯𝘵𝘩𝘴 𝘰𝘳 𝘯𝘪𝘯𝘦 𝘺𝘦𝘢𝘳𝘴? 𝘐𝘧 𝘪𝘵 𝘸𝘪𝘭𝘭 𝘵𝘳𝘶𝘭𝘺 𝘮𝘢𝘵𝘵𝘦𝘳 𝘧𝘰𝘳 𝘢𝘭𝘭 𝘰𝘧 𝘵𝘩𝘰𝘴𝘦, 𝘱𝘢𝘺 𝘢𝘵𝘵𝘦𝘯𝘵𝘪𝘰𝘯 𝘵𝘰 𝘪𝘵.

2. 𝘈𝘧𝘵𝘦𝘳 𝘨𝘳𝘢𝘥𝘶𝘢𝘵𝘪𝘯𝘨 𝘪𝘯 𝘐𝘯𝘵𝘦𝘳𝘯𝘢𝘵𝘪𝘰𝘯𝘢𝘭 𝘙𝘦𝘭𝘢𝘵𝘪𝘰𝘯𝘴 𝘪𝘯 2011, 𝘐 𝘵𝘶𝘳𝘯𝘦𝘥 𝘥𝘰𝘸𝘯 𝘴𝘢𝘧𝘦, 𝘤𝘰𝘳𝘱𝘰𝘳𝘢𝘵𝘦 𝘫𝘰𝘣 𝘰𝘧𝘧𝘦𝘳𝘴 𝘢𝘯𝘥 𝘪𝘯𝘴𝘵𝘦𝘢𝘥 𝘢𝘤𝘤𝘦𝘱𝘵𝘦𝘥 𝘢 𝘱𝘰𝘴��𝘵𝘪𝘰𝘯 𝘢𝘵 𝘢𝘯 '𝘪𝘯𝘤𝘶𝘣𝘢𝘵𝘰𝘳' 𝘪𝘯 𝘓.𝘈. - 𝘢 𝘵𝘦𝘤𝘩 𝘸𝘰𝘳𝘥 𝘧𝘰𝘳 𝘢 𝘵𝘦𝘢𝘮 𝘰𝘧 𝘱𝘦𝘰𝘱𝘭𝘦 𝘸𝘩𝘰 𝘢𝘳𝘦 𝘧𝘶𝘯𝘥𝘦𝘥 𝘣𝘺 𝘪𝘯𝘷𝘦𝘴𝘵𝘰𝘳𝘴 𝘵𝘰 𝘤𝘳𝘦𝘢𝘵𝘦 𝘢𝘱𝘱𝘴. 𝘐 𝘬𝘯𝘦𝘸 𝘵𝘩𝘦 𝘧𝘶𝘵𝘶𝘳𝘦 𝘸𝘢𝘴 𝘥𝘪𝘨𝘪𝘵𝘢𝘭 𝘢𝘯𝘥 𝘵𝘩𝘢𝘵 𝘐 𝘩𝘢𝘥 𝘵𝘰 𝘵𝘢𝘬𝘦 𝘢 𝘳𝘪𝘴𝘬.

3. 𝘓𝘰𝘰𝘬 𝘢𝘵 𝘸𝘩𝘢𝘵 𝘪𝘴 𝘣𝘳𝘰𝘬𝘦𝘯 𝘪𝘯 𝘴𝘰𝘤𝘪𝘦𝘵𝘺, 𝘧𝘪𝘨𝘶𝘳𝘦 𝘰𝘶𝘵 𝘩𝘰𝘸 𝘵𝘰 𝘮𝘢𝘬𝘦 𝘪𝘵 𝘣𝘦𝘵𝘵𝘦𝘳, 𝘢𝘯𝘥 𝘵𝘩𝘦𝘯, 𝘢𝘳𝘰𝘶𝘯𝘥 𝘵𝘩𝘢𝘵, 𝘧𝘰𝘳𝘮𝘶𝘭𝘢𝘵𝘦 𝘢 𝘣𝘶𝘴𝘪𝘯𝘦𝘴𝘴.

4. 𝘏𝘢𝘷𝘦 𝘢 𝘥𝘳𝘦𝘢𝘮, 𝘤𝘩𝘢𝘴𝘦 𝘪𝘵 𝘥��𝘸𝘯, 𝘫𝘶𝘮𝘱 𝘰𝘷𝘦𝘳 𝘦𝘷𝘦𝘳𝘺 𝘴𝘪𝘯𝘨𝘭𝘦 𝘩𝘶𝘳𝘥𝘭𝘦, 𝘢𝘯𝘥 𝘳𝘶𝘯 𝘵𝘩𝘳𝘰𝘶𝘨𝘩 𝘧𝘪𝘳𝘦 𝘢𝘯𝘥 𝘪𝘤𝘦 𝘵𝘰 𝘨𝘦𝘵 𝘵𝘩𝘦𝘳𝘦.

***
That's a wrap. Hope you enjoyed these inspirational quotes from Whitney. If you did:

1. Follow me @arjunmahadevan for more like this (and for everything LLCs including formation + banking + tax saving hacks for your business)

2. RT this, if you can, to share this advice with a friend

[Darryl Walker @darrylw]

https://t.co/fKPV5II4db

[Darryl Walker @darrylw]

https://t.co/IN8UGFI582

[Condé Nast Traveller @cntraveller]

There's not much that's more charming than a picturesque café in Paris. These are the ones to visit all year-round. https://t.co/fxsVmw8S7H

[Vala Afshar @ValaAfshar]

12 new generative AI tools for various tasks

[Alex Xu @alexxubyte]

What is a webhook?

The diagram below shows a comparison between polling and webhook.

Assume we run an eCommerce website. The clients send orders to the order service via the API gateway, which goes to the payment service for payment transactions. The payment service then talks to an external payment service provider (PSP) to complete the transactions.

There are two ways to handle communications with the external PSP.

🔹 1. Short polling
After sending the payment request to the PSP, the payment service keeps asking the PSP about the payment status. After several rounds, the PSP finally returns with the status.

Short polling has two drawbacks:
1) Constant polling of the status requires resources from the payment service.
2) The External service communicates directly with the payment service, creating security vulnerabilities.

🔹 2. Webhook
We can register a webhook with the external service. It means: call me back at a certain URL when you have updates on the request. When the PSP has completed the processing, it will invoke the HTTP request to update the payment status.

In this way, the programming paradigm is changed, and the payment service doesn’t need to waste resources to poll the payment status anymore.

What if the PSP never calls back? We can set up a housekeeping job to check payment status every hour.

Webhooks are often referred to as reverse APIs or push APIs because the server sends HTTP requests to the client. We need to pay attention to 3 things when using a webhook:
1) We need to design a proper API for the external service to call.
2) We need to set up proper rules in the API gateway for security reasons.
3) We need to register the correct URL at the external service.

–
Subscribe to our weekly newsletter to get a Free System Design PDF (158 pages): https://t.co/90RMwmA3Mu

[Zimmy's Nook @Zimmysnook]

Garlic Butter Shrimp & Steak🍤🥩

Succulent shrimp, cooked in a fragrant garlic & herbaceous butter mixture then poured over juicy flank steak slices. Have I caught your attention yet?
Recipe👉 https://t.co/ZvRX4Ws0W6

@HestanCulinary @HestanHome #trendingvideo #foodie #trending

[Savita Chefdehome @chefdehome]

👉Ratatouille Stuffed Zucchini Boats
🔗https://t.co/QHan8Xiic9

Ratatouille-style seasoned eggplant, summer squash, zucchini and red bell pepper cooked with fresh herbs, tomatoes, and spices stuffed in flavorful #zucchini boats for an amazing #summer weeknight #dinner

[Scott Thomas @GrillinFool]

Elotes are spectacular! I roasted ears of corn on my ⁦@LoCoCookers⁩ Kettle and brushed with melted butter. Then slathered with sour cream, BBQ rub, Cotija & cilantro:

https://t.co/ADNNpJpWsf

How many you want?

#elote #elotes #lococookers #streetcorn

[Condé Nast Traveller @cntraveller]

The charming (yet quiet) alternative to Lake Como. https://t.co/VJEXv5NprR

[Darryl Walker @darrylw]

@RGIII @Chiefs @tkelce 1 margarita…., 2 margarita….song! 😂

[SeasonalRecipes @InSeasonRecipes]

Pomegranate ice: This is so refreshing and so simple to make, you'll want to have some in the freezer at all times #freezable #easilyhalved #vegetarian #vegan #seasonal #recipe https://t.co/0kZw4QPV04

[DadChef @the_dadchef]

What’s your favorite vegetable?

Broccoli 100,000% for me.

[Tom Hirst @tom_hirst]

I'm 36 today.

Here are a few things that I wish I learned earlier:

[ESV Bible Daily Verse @esvdaily]

“There is none holy like the LORD: for there is none besides you; there is no rock like our God. https://t.co/9NgsjEcywN

[Darryl Walker @darrylw]

Contribution Margin: What It Is, How to Calculate It, and Why You Need It https://t.co/odscD3YMEh