
GrowthX is a company that delivers AI-powered growth engines combining expert human guidance with AI workflows to drive sustainable business growth. Their subscription-based service offers a comprehensive suite of workstreams including content creation, SEO, link building, social media, conversion rate optimization, paid media, gated content, and outbound sales. GrowthX differentiates itself by blending AI automation with expert oversight, enabling scalable, high-quality content production and growth marketing strategies tailored to client needs. They serve clients across various industries, delivering measurable results such as significant organic traffic growth, content velocity increases, and conversion improvements. Their business model is subscription-based with typical engagements ranging from $12,000 to $20,000 per month, focusing on long-term growth through a 12-month minimum commitment. The company operates remotely and emphasizes a data-driven, iterative approach to content strategy, distribution, and conversion optimization, positioning itself as a leader in AI-led growth marketing.

GrowthX is a company that delivers AI-powered growth engines combining expert human guidance with AI workflows to drive sustainable business growth. Their subscription-based service offers a comprehensive suite of workstreams including content creation, SEO, link building, social media, conversion rate optimization, paid media, gated content, and outbound sales. GrowthX differentiates itself by blending AI automation with expert oversight, enabling scalable, high-quality content production and growth marketing strategies tailored to client needs. They serve clients across various industries, delivering measurable results such as significant organic traffic growth, content velocity increases, and conversion improvements. Their business model is subscription-based with typical engagements ranging from $12,000 to $20,000 per month, focusing on long-term growth through a 12-month minimum commitment. The company operates remotely and emphasizes a data-driven, iterative approach to content strategy, distribution, and conversion optimization, positioning itself as a leader in AI-led growth marketing.
Location: San Francisco
Product: AI-powered content & growth platform plus expert-led services
Business model: Subscription-based, enterprise/monthly engagements (~$12k–$20k)
Founders: Marcel Santilli (CEO) and Daniel Lopes (CTO)
Recent funding: Series A (May 2025), $12.0M
Content-driven user acquisition and growth marketing for growth-stage companies.
2024
Marketing technology / Growth marketing
$12,000,000
“Madrona Venture Group led Series A”
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About GrowthX AI At GrowthX, we design growth systems that integrate AI automation and expert guidance to help marketing teams with content creation, distribution, and conversion. Since our founding in 2024, we’ve hit seven-figure annual revenue, grown by double digits month-over-month, and teamed up with incredible partners from startups to publicly traded leaders like: Ramp, Webflow, Abnormal Security, Superhuman, Vapi AI, Homebase, Strapi, Galileo AI, Rapyd to name a few.
Our Approach Combines
We go beyond software; we become our clients’ growth partners by leveraging technology, strategy, and hands-on execution.
About The Role We are seeking a Staff full-stack developer with a strong product mindset and high standards for user interface design. Our stack includes React (TypeScript with Tailwind/Shadcn) and Ruby on Rails (Rails experience is a plus but not required).
Most of your time will likely be spent working full-stack in internal platform, which supports everything from SEO tools to AI-powered text editing – but at an early stage team, the needs might vary.
Being an AI-native company, we expect every team member to embrace AI to boost productivity. Familiarity with tools like Cursor is essential, but we are happy to provide guidance here.
This is a fully remote role, but we do ask for at least 4 hours of overlap with US Pacific Time—during reasonable work hours.
What You'll Do
About You We’re looking for someone with:
This role is more suited for someone that have created entire projects on their own, even if just as a side-projects, than someone that prefers a lot of structure or guidance.
Perks 🌍 Fully Remote Work
🏖 Ample Time Off
📚 Professional Growth
🤝 Collaborative Culture
Work Visa: Applicants must have legal authorization to work in the country of residence. We are not able to provide employment visa sponsorship at this time.
Compensation Range: $170K - $250K