It’s YC W19 Demo Day – Day 1 this afternoon! Meet 7 companies that recently announced they’re part of the YC Winter 2019 batch. To see more companies from YC W19 read Part 1, Part 2, Part 3, Part 4, Part 5 and Part 6.

CareerTu is an online school that is training the next generation of marketing tech leaders in China. They currently have 160,000 students and a multimillion dollar run rate. Founder Ruiwan Xu went from an unpaid internship to a growth marketing manager position at Amazon, and she personally experienced the ever-widening gap between what students learn in school and what the industry needs. She started CareerTu to help people like herself accelerate their careers. CareerTu has helped many students land high-paying positions at companies like Google, Amazon, Facebook, GroupM, Tencent, L’Oreal and LVMH etc. Read more about CareerTu in TechCrunch.

Deel makes managing international contractors easy — it’s like Gusto for international contractors. There are over 20M international contractors getting paid over $30B a year working for US companies, but the process of onboarding and paying international contractors is terrible, especially at scale. Founders Shuo Wang and Alex Bouaziz are MIT engineers who built previous companies that exposed them to the problems international freelance workers face. They aim to remove all the contractual, payment and compliance pains from companies while giving international contractors the best payment experience.

Vectordash is Netflix for video games. With Vectordash, people can play the the latest top games like Fortnite and Apex Legends on any computer without needing to buy an expensive gaming PC or console. About 95% of computers can’t run the latest games – and Vectordash is changing that by using their near-zero latency streaming protocol to render games on a nearby server. Read more about Vectordash in TechCrunch.

NALA is building internet-free mobile payments for Africa. They let users pay bills, do p2p payments and purchase cell phone minutes all without an internet connection. Africa has over 420 million mobile money users, and NALA has focused on building their app offline (Internet Free) to give users access to payments in areas of limited connectivity. NALA is live in Tanzania, has transacted over $3.5M and is one of Google PlayStore’s Top Free Finance Apps in Tanzania. Read more about NALA on TechCrunch.

WorkClout is a SaaS company that helps manufacturers increase their operational efficiency. WorkClout tracks every action on the factory floor and uses the data to make suggestions on how to increase efficiency. There are over 250,000 manufacturers in the US and around 56% manage their process on paper and excel because existing solutions take up to two years to implement and can cost manufacturers over $250k. WorkClout reduces the implementation time and cost by over 90%. The CEO of WorkClout, Arjun Patel, grew up helping his dad’s factory grow to a $50M in annual revenue operation. Read more about WorkClout on TechCrunch.

Doorport turns existing apartment callboxes into smart devices. Installation takes 5 minutes and requires no wiring, drilling or infrastructure changes. Once installed, Doorport allows residents, guests, and delivery services, such as DoorDash and Instacart, to unlock the building using a mobile app. Read more about Doorport on TechCrunch.

Brew is a podcast app that lets listeners support creators through a monthly subscription, like Netflix for podcasts. Listeners have access to ad free, original content, as well as the content they love that’s published on multiple platforms. Brew has partnered with 10 established creators (10M+ reach) to launch Brew Originals. Before Brew, the team built BuyMeACoffee which is used by 40k creators and won Product Hunt’s Fintech Product of the Year for 2018. Read more about Brew.com on TechCrunch.