Founding Growth Lead, New York

Fifth Dimension AI

$175K — $190K *
Business Services
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 6+ years in B2B SaaS growth or demand generation
  • Experience with enterprise sales teams
  • Built growth initiatives from ground up (0-1 or 0.5-1)
  • Hands-on experience with HubSpot
  • Familiar with account-based marketing (ABM) strategies

Responsibilities

  • Build and enhance outbound and nurture workflows
  • Create a repeatable enterprise pipeline engine
  • Optimize growth workflows in HubSpot
  • Design and execute growth experiments across various channels
  • Develop messaging for multi-stakeholder engagement
  • Improve funnel targeting, sequencing, and conversion
  • Enhance visibility around growth performance metrics

Benefits

  • Engaging work in a dynamic startup environment
  • Opportunity to shape the growth function as the company scales
  • Collaborative and cross-functional team culture
  • Focus on operational efficiency with AI workflows
  • Freedom to experiment and test new strategies
Full Job Description
What is the role?

We're looking for a hands-on, highly analytical and highly executional Growth Lead to help us build and scale our enterprise demand generation motion.

You'll work across outbound, nurture, events, lifecycle, growth experimentation and experimenting with ABM growth tactics to help us reach the right enterprise buyers in the right way. You'll partner closely with sales to build repeatable systems, improve funnel visibility and help define what scalable pipeline generation should look like at Fifth Dimension.

This is a great role for someone who enjoys building from the ground up. We have momentum, customers and a clear market opportunity, but we're still early in how our growth function operates. You'll be joining at the stage where there is plenty to figure out and improve.

You'll need to be comfortable switching between strategy and execution, and genuinely skilled at translating strategy into an executable plan. You understand how individual tactics fit within a larger strategic framework, no random acts of marketing. One day you might be mapping nurture journeys in HubSpot. The next, you might be analysing funnel conversion data, refining outbound logic, improving event follow-up or helping shape GTM priorities.

You'll have built strong marketing foundations the traditional way, and you now know how to set up AI workflows that deliver real efficiency, with the right human oversight to maintain quality. We care far more about ownership, operational thinking and execution than polished corporate marketing playbooks.

We don't believe channels should be fixed in advance. This is a Growth role: we'd expect you to bring hypotheses, run experiments and use whatever channel mix proves most effective, rather than being constrained by a predefined playbook. Frameworks like Crossing the Chasm are useful and there are real lessons to take from them, but they aren't the only lens on our market. We're cautious about assuming traditional technology adoption models map neatly onto AI adoption, so we want someone who brings experience and frameworks but is equally willing to test assumptions and adapt based on what they're seeing in the market.
What you'll do
  • Build and improve outbound and nurture workflows across email, LinkedIn, events and engagement-triggered campaigns
  • Help create a more repeatable enterprise pipeline engine
  • Own and optimise growth workflows in HubSpot, including account-level insight and data management
  • Design, run and measure growth experiments across channels, using the mix that proves most effective
  • Form hypotheses on the best ABM strategies for our ICPs, run the tests, report the results and iterate the approach
  • Improve targeting, sequencing and conversion across the funnel
  • Build clearer reporting and visibility across growth performance
  • Work closely with SDRs and sales to improve lead quality and follow-up
  • Engage and track the buying group, developing the messaging and content that moves multiple stakeholders down the funnel
  • Partner with leadership on growth priorities, channel performance and GTM rhythm
  • Bring more structure and operational rigour to how we generate demand
  • Help shape what the growth function becomes as the company scales
What we're looking for
You've probably:
  • Spent 6+ years in B2B SaaS growth, demand generation or GTM operations
  • Worked in early-stage or scaling companies before
  • Helped build something from 0-1 or 0.5-1 (at least once)
  • Worked closely with enterprise sales teams
  • Built workflows and campaigns yourself rather than only managing agencies
  • Built strong marketing foundations the traditional way, and since learned to set up AI workflows with the right guardrails and human oversight
  • Used HubSpot heavily and understand how funnels, workflows and reporting connect, including configuring it to harvest account-level insight
  • Run account-based marketing: engaging and tracking the buying group, and developing multithreaded conversations across a complex buying committee
  • Experience setting up, testing and iterating ABM strategies with hands-on execution
  • Operated in environments where priorities change quickly and structure is still evolving
You're probably someone who:
  • Thinks in systems and metrics
  • Likes solving operational problems
  • Owns it, you see a problem and take responsibility for solving it
  • Ships it, you value momentum, execution and learning through action
  • Is comfortable with ambiguity
  • Doesn't wait to be told exactly what to do
  • Enjoys working cross-functionally
  • Cares more about outcomes than optics
  • Doesn't do boring, you challenge the status quo, bring original ideas and make things better than you found them
Bonus points for experience in:
  • PropTech
  • Real Estate
This role may not be for you if...
  • You prefer larger, more mature marketing teams with established playbooks
  • You enjoy strategy more than execution
  • You need lots of structure around you to operate well
  • You optimise for perfection over momentum (one of our values is 'Ship it'!)
  • You're a paid media specialist looking for a channel-specific role rather than a broad growth mandate
  • You want a narrow role with highly defined boundaries
Compensation

  • $175,000 - $190,000 (depending on experience) + bonus


Department Marketing Locations New York

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