Hands-On Builder & Operator — Build from Scratch (London)

Mash Studios Official; Greater London; On-site; GBP 90,000 - 160,000; Full time

Job summary

Mash Studios Official is hiring a Chief of Staff to join the founder in London, in person. The role demands a hands-on builder who can take ideas from nothing, assess commercial viability, and execute to turn opportunities into real businesses.

You’ll work directly with the founder from day one, speaking to customers and partners, testing assumptions, and moving fast to build the next success. No prior media experience is required; the focus is on thinking, what you’ve built, and what you’ve

Qualifications

• Commercially curious: understands how an industry makes money, who buys what and where value is created.
• Zero-to-one builder: starts from blank sheets and turns ideas into real businesses.
• Numerate and structured: asks the right questions and reasons about ROI, pricing, margins, and P&L.
• Customer-discovery minded: speaks to people quickly, tests assumptions and learns from market feedback.
• Proactive and high urgency: acts without needing direction and moves quickly.
• Builder not caretaker: creates from scratch and improves existing ventures.

Responsibilities

• Take ideas from a blank sheet, rapidly understand unfamiliar markets, speak to customers and partners, test assumptions, build business cases and turn opportunities into real businesses.
• Roll up sleeves and make things happen yourself.
• Work closely with the founder from day one.

Skills

Commercial mindset

Zero-to-one builder

Numerate & structured

Customer discovery

Proactive urgency

Builder mindset

Low ego

Solutions oriented

Owner mindset

Job description

Mash Studios Official is hiring a Chief of Staff to join the founder in London, in person. The role demands a hands-on builder who can take ideas from nothing, assess commercial viability, and execute to turn opportunities into real businesses.

You’ll work directly with the founder from day one, speaking to customers and partners, testing assumptions, and moving fast to build the next success. No prior media experience is required; the focus is on thinking, what you’ve built, and what you’ve