MadMen AI is a seed-stage AdTech startup ($8M raised) founded by ex-leaders from Facebook, WhatsApp, Twitter, and Instagram. We’re disrupting a $950B industry by automating ad creation with AI agents—blending Don Draper-level creativity with razor-sharp data insights.

We're building a new ad agency reporting platform.

Maestro AI is an early-stage, venture-backed startup focused on streamlining the process of software development by providing real-time, comprehensive insights for teams. They eliminate information silos by aggregating data from multiple collaborative tools like Slack, Jira, Notion, and Github.

Mage is the home for open-source AI enthusiasts, from beginner to expert. We are a fast-moving seed stage start-up with seven-figure ARR who ship daily to millions. If you love open-source AI software & want to help integrate it into a product with a thriving community, Mage is the place for you.

We're building the tools that the next 200 million programmers will use.

Magnetic (YC S25) is building the AI tax preparer for accounting firms. We use vision models to extract and structure data from tax documents and automatically populate legacy tax software, saving CPA firms hours of tedious data entry per tax return.

MahiGaming is an industry-leading online casino game development company with multiple studios in North America with some of the highest distribution of games across global markets.

Join MailChannels, the leading email sending service trusted by over 30 million domains for dependable email delivery and advanced spam and phishing detection.

MailerLite is on the lookout for a Senior PHP Engineer to work on MailerSend — a fast-growing transactional email product, built for developers and designed for teams.

Mailgun, part of Sinch, is responsible for an Email API, handling email ingestion, storage, processing, and delivery, along with supporting product functionality such as mailing lists, tracking, domains, inbound routes, etc. Their system handles close to 2 billion emails daily, utilizing Golang across their microservices. Technologies include MongoDB, Cassandra, Kafka, Nomad, ElasticSearch, Prometheus, Grafana, Github, and more. The focus is on product enhancement, scalability, reliability, and maintainability.