Toolmill Briefswhat companies are building, read from their hiring

Company brief · updated 2026-10-19

Substack

substack.com · B2B · The app for independent voices

16open roles
8new in 30 days
5closed in 30 days
16remote-eligible
steadyhiring velocity

What they're building

Sponsorships business built from the ground up (brand sales, campaign operations, and sponsorship product) strong signal

Today: Creator subscriptions: "90% goes to you. The rest powers the platform that supports your work." (site)

Roles: Product Operations, Brand Partnerships · Product Manager - Sponsorships · Full Stack Software Engineer - Sponsorships · Sales Manager, Brand Partnerships · Creative Strategist, Brand Partnerships

Requirements mention: "building its sponsorships business from the ground up" (Product Operations, Brand Partnerships) · "ad serving", "programmatic demand partners", "self-service buying" (Product Manager - Sponsorships) · "willingness to prototype", "ML technology" (Full Stack Software Engineer - Sponsorships) · "direct-sold sponsorships", "seven-figure deals", "pipeline", "forecast" (Sales Manager, Brand Partnerships) · "branded content", "brand RFP process" (Creative Strategist, Brand Partnerships)

Inference: Substack is adding a paid sponsorship line next to subscriptions. The build includes a direct sales team, creative and campaign staff, and ad-serving product work. Four of the five roles are in New York; the engineering role is in San Francisco (HQ).

Subscription payments and payouts moderate signal

Today: "No platform fees, no tiers, no contracts" and "90% goes to you" (site)

Roles: Full Stack Software Engineer - Payments

Requirements mention: "Stripe", "payment processors", "payment surfaces" (Full Stack Software Engineer - Payments) · "payout systems", "subscribe flow" (Full Stack Software Engineer - Payments)

Inference: the posting describes new payout systems, an A/B tested subscribe flow and gift subscriptions. This is one open role, so the signal is limited to payments work in San Francisco (HQ).

Creator tools for audiences, email, and analytics weak signal

Today: "Built-in tools" (site heading)

Roles: Full Stack Software Engineer - Enterprise

Requirements mention: "email automations", "audience segmentation", "analytics", "external APIs" (Full Stack Software Engineer - Enterprise)

No inference (single role). The posting describes features for creators growing audiences and businesses on Substack: website customization, email automations, segmentation, analytics and external APIs. The role is in New York.

Reader and creator growth, activation and retention weak signal

Today: "A network that grows with you" (site heading)

Roles: Full Stack Software Engineer - Growth · Product Analyst

Requirements mention: "experiments", "discovery engines" (Full Stack Software Engineer - Growth) · "retention curves", "cohort analysis", "growth accounting", "A/B test" (Product Analyst)

No inference (weak signal). Both postings describe experiment-driven work on bringing in new readers and creators and keeping them. Both roles are in San Francisco (HQ).

Community chat and direct messages weak signal

Today: "Chat" (site navigation) and "Great discussions" (site heading)

Roles: Full Stack Software Engineer - Community

Requirements mention: "Substack Chat", "DMs" (Full Stack Software Engineer - Community)

No inference (single role). The posting describes work on community products ranging from DMs to Substack Chat to new products. The role is in San Francisco (HQ).

Brand and creator events programme, UK and global weak signal

Today: The site does not describe events; the posting ties them to Substack's mission "to be a new home of culture"

Roles: Events Lead, UK & International · Head of Events

Requirements mention: "experiential event marketing", "ROI tracking", "measurement frameworks" (both roles) · "global events budget", "sponsored events", "partnerships", "coach and develop event producers" (Head of Events)

No inference (weak signal). The postings describe a year-round events programme with a London-based lead and a New York-based head, both in Communications. The Head of Events posting lists sponsored events.

Where the headcount is going

DepartmentOpen
Engineering4
Communications3
Sponsorships3
Product2
Operations2
People1
Data1

16 open roles across 8 departments: Engineering (5) is the largest, followed by Sponsorships (3), Communications (2) and Operations (2); all 16 are marked remote.

Who they need

Seniority: Mid-level 6, senior 5, director 3, manager 2.

Skills named most: TypeScript (5), Node/Express (5), React (5), Postgres (5), SQL (3), APIs (3), ad serving (2), experiments (2), self-service buying (2), measurement frameworks (2), ROI tracking (2), experiential event marketing (2)

Locations: San Francisco (HQ) 8, New York 6, London 1, Remote 1. All 16 postings are marked remote; the Events Lead role is listed as London and the Standards & Enforcement Specialist role as Remote.

How to use this

If you're applying: Engineers with TypeScript, Node/Express, React and Postgres have the most matching roles (5); four of those five are in San Francisco (HQ). Check each posting's listed requirements before applying, since they differ by role.

If you're selling or recruiting: Sponsorships is the largest new build-out, with 5 roles across Sponsorships, Product and Engineering in New York and San Francisco (HQ). Sales Manager, Brand Partnerships and Product Manager - Sponsorships are the roles to call about. Velocity is steady: 6 roles opened in the last 30 days and 5 in the prior 30 days, with 3 closed in the last 30 days.

Get told when Substack opens new roles.

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Open roles (16)

TitleDepartmentLocationPosted
Product Manager - PaymentsProductSan Francisco (HQ) (remote)2026-10-22
Senior Communications Manager, ShowsCommunicationsSan Francisco (HQ) (remote)2026-10-19
Full Stack Software Engineer - PaymentsEngineeringSan Francisco (HQ) (remote)2026-10-13
Head of PeoplePeopleSan Francisco (HQ) (remote)2026-10-09
Product Operations, Brand PartnershipsSponsorshipsNew York (remote)2026-10-06
Product Manager - SponsorshipsProductNew York (remote)2026-10-05
Product AnalystDataSan Francisco (HQ) (remote)2026-10-01
Full Stack Software Engineer - EnterpriseEngineeringNew York (remote)2026-09-30
Full Stack Software Engineer - SponsorshipsEngineeringSan Francisco (HQ) (remote)2026-09-15
Events Lead, UK & InternationalCommunicationsLondon (remote)2026-09-11
Head of EventsCommunicationsNew York (remote)2026-09-10
Full Stack Software Engineer - GrowthEngineeringSan Francisco (HQ) (remote)2026-08-19
Director, Strategic Business Operations (BizOps)OperationsSan Francisco (HQ) (remote)2026-07-30
Sales Manager, Brand PartnershipsSponsorshipsNew York (remote)2026-07-24
Creative Strategist, Brand PartnershipsSponsorshipsNew York (remote)2026-07-15
IT Systems AdministratorOperationsSan Francisco (HQ) (remote)2026-06-04