GTM Engineer
TL;DR
Mailin runs cold-email infrastructure; you'll run the agency layer on top—owning the DFY (Done-For-You) outbound service like it's your own shop, campaigns and all.
Own it end-to-end: client intake, campaign design, list logic, domain strategy, volume ramping, results tracking. You're the translator between what clients want and what the email infrastructure can deliver.
Tools of the trade: Instantly, Smartlead, Clay—plus the grit to manage inbox rotation, deliverability, and reputation so emails land in inboxes, not spam folders.
Team & scale: manage a junior operator, build repeatable SOPs so the next campaign isn't a custom snowflake, and keep the internal infra team in sync on what you're sending and when.
Who fits: agency operator or founder who's sent cold email at real volume (not toy tests), knows deliverability inside out, and can talk to clients without flinching. Pay runs $60–96k, with upside tied to DFY growth.
Job Description
GTM Engineer / Head of DFY (Cold Email & Outbound)
Mailin is a cold-email infrastructure SaaS built for serious outbound at scale. On top of our infrastructure, we run a DFY (Done-For-You) outbound service for high-volume clients. This role is to own and run that DFY operation like an agency.
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Role Overview
We’re hiring a GTM Engineer / Head of DFY to fully own the DFY side of Mailin.
You’ll be responsible for: • Executing and scaling outbound campaigns • Managing client relationships • Designing systems and SOPs • Overseeing a junior operator who assists with execution
This is an operator + client-facing role. You are effectively running the DFY agency layer on top of our SaaS.
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Responsibilities
DFY Ownership & Operations • Own the DFY outbound service end-to-end • Run campaigns for multiple high-volume clients simultaneously • Design and maintain SOPs for onboarding, launch, scaling, and QA • Turn DFY into a repeatable, scalable operation (not custom one-offs)
Cold Email Execution • Build and manage campaigns using: • Instantly • Smartlead • Clay • Handle data sourcing, enrichment, segmentation, and list logic • Understand and manage: • Inbox rotation • Domain strategy • Volume ramping • Deliverability and reputation • Monitor results and optimize for replies, meetings, and consistency
Client Management • Act as the main point of contact for DFY clients • Translate ICPs, offers, and goals into outbound systems • Set expectations, provide updates, and manage performance discussions • Help define which clients are a good fit for DFY at scale
Team & Scaling • Manage and delegate work to a junior operator • Review work quality and prevent infra or data mistakes • Work closely with internal infra team to align sending behavior with capacity • Continuously improve systems as volume and client count grow
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Must-Have Experience • Either: • Experience working at a large outbound / lead gen / growth agency, or • Previously owned or operated an outbound or lead-gen agency • Deep hands-on experience with: • Instantly • Smartlead • Clay • Proven experience sending cold email at scale (not small tests) • Strong understanding of deliverability and volume management • Comfortable being client-facing and owning outcomes • Able to build systems and processes, not just execute tasks
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Nice-to-Have • Experience running DFY or retainer-based outbound services • Experience managing junior operators or SDRs • Familiarity with private or custom email infrastructure • GTM, RevOps, or growth engineering background
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Compensation
$60,000 – $96,000 / year(Depending on experience, with upside tied to DFY growth)
Company Details
Company
Mailin
Industry
Technology, Information and Internet
Company Size
2-10 employees
Growth
6-month: 200%
12-month: 500%