NL
Proster
Today at 09:14Ground Zero Obsession
We are a new agency. We don't have a massive portfolio of logos yet, which means our founding clients get our absolute, undivided obsession.
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Cohort 01 — Now vetting
Your new Product Lead is typing... 💬
Balkan-built fractional product operators. We drop directly into your startup's channels to ship roadmaps, unblock engineering, and own outcomes for 2-3 days a week. No corporate bloat, just embedded builders.
Currently vetting 14 applicants for 5 spots
#northline-cohort-01
AM
Alex M.
Roadmap for Q4 is live. Engineering unblocked on checkout flow.
SP
Sarah P.
Discovery calls this week surfaced the real buyer persona. Updating the PRD now.
TJ
Toni J.
Stakeholder pushback handled. Shipping the MVP cut on Friday.
Alex is typing...
Sarah
Clear the noise. Ship the product. 🚀
BA
Balkan Ops
Today at 09:15The Balkan Advantage
Silicon Valley-grade operational rigor, without the timezone lag. We are tapping into a rising hub of deep technical excellence and relentless work ethic.
OP
Operators
Today at 09:16Operators, Not Advisors
We don't do maintenance mode. We get our hands dirty, run the discovery, write the specs, and unblock your engineering pipelines.
The Alignment Sync. 🤝
The ATS is dead. We index purely on how you navigate high-stakes trade-offs and communicate with stakeholders under pressure.
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Step 01
The Intake
Toss the standard cover letter. Show us what you’ve shipped, and more importantly, what you’ve deprecated.
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Step 02
The Crisis
A timed, 15-minute operational nightmare. Show us how you balance legal risks, revenue targets, and angry stakeholders in real-time.
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Step 03
The Briefing
A 5-minute asynchronous video pitch. Prove you can command a room and defend the integrity of your product strategy.
Roster alumniEx-StripeEx-LinearEx-NotionEx-RampEx-FigmaEx-VercelEx-ShopifyEx-Airbnb
The practice
A boutique built for one job.
Generalist agencies stretch across five disciplines and land nowhere. We picked one — product management for early-stage startups — and went deep.
Product, only.
01We don't do design sprints, growth audits, or fractional-everything. Proster is a specialist practice — product strategy, discovery, roadmap, and the operating cadence that ships it.
Seed and Series A, only.
02The transition from founder-led product to a real product org is the hardest one. That narrow window is the only window we work in — every operator on the roster has lived it.
Embedded, not advisory.
03Your fractional leader shows up in Slack, runs standup, writes the PRD, and interviews users this week. Not a deck in six.
A unique model
One operator. Two to three days. Fixed monthly.
No billable hours, no bloated retainers, no bench of juniors doing the work. A single senior operator, priced flat, engaged month to month.
- Week 0
Match, not shortlist.
We propose one operator, not five résumés. Handpicked by a partner who's talked to your founders.
- Week 1–2
Embed and diagnose.
Your operator joins standups, ships the first artifact, and returns a diagnosis of what's actually blocking product velocity.
- Month 1+
Operate the cadence.
Roadmap, discovery, weekly review, hiring plan. The operating system of a real product org — running two to three days a week.
- Month 6+
Hand off, don't hang on.
When it's time for a full-time head of product, we help you hire them and step out. Our success metric is being replaced.
Two ways in