Community & Platform Builder

Job Description

MUST be ready to build. No task is too small.

Nucleus is a platform where community, media, and capital meet. We work with a focused network of about 100-200 investors shaping the future of venture, along with top founders and technical builders running frontier labs and AI startups.

You’ll work directly with our founder, helping maintain deep, intentional relationships and capturing what top founders think about the best investors in the world. Through the Nucleus NEXT Fellowship, you’ll be in the room from day one with partners at top global firms and help design experiences that help them build their platforms.

Your days will move fast. One day you might host a dinner. Another you’ll update HubSpot, manage invites, or share clips that spotlight emerging talent. Every detail contributes to building the most trusted network in venture.

The Role Covers Four Core Functions

Community & Relationships

• Nurture and deepen connections across a curated network of 100–200 investors, founders, and builders
• Identify who each person values knowing and create genuine, additive introductions
• Help design and host world-class events and moments that make the top minds in venture feel seen and supported
• Partner on the Nucleus NEXT Fellowship, working directly with GPs from the world’s leading firms to curate experiences that help them build their platforms

Platform Ops & Media

Strategy & Execution

Founder Shadow & Support

You might be :

Location

Hybrid in SF (2-3 days a week required no flex, must be local). Expect regular working sessions at Shack15 and time in some of the most sought after rooms in venture, including partnership meetings, events, and dinners. Ideal if open to living in NYC for 1-3mo.

Apply

Click the button here to apply. If you want to go above and beyond, ping our founder on X @alexklein0x