Senior Email Deliverability Engineer & Outbound Systems Architect

Senior Email Deliverability Engineer & Outbound Systems Architect

THIS IS NOT AN EMAIL MARKETING JOB. THIS IS INFRASTRUCTURE.

We will be sending 200k–1M outbound emails/week across multiple domains and ESPs. You will architect, operate, and scale the entire system with precision.

If you have not personally built deliverability infrastructure from zero ? scale, you will not succeed here.

IMPORTANT: If your experience is team-level, agency-level, or tool-assisted (Instantly presets, Smartlead presets), you will not pass the assessment. We are hiring someone who has personally built, tested, and repaired systems — not someone who "used a tool."

WHAT YOU WILL OWN
Full-stack outbound ecosystem:

150k–500k mixed warm/cold lists (70% Gmail)
Multi-domain + multi-ESP sending architecture
DNS engineering (SPF/DKIM/DMARC/BIMI)
Domain/IP warmup schedules + reputation management
List segmentation, list cleaning, bounce/complaint management
Deliverability testing + seed monitoring
ESP orchestration (Instantly, Smartlead, Mailgun/SES/SendGrid)
CRM and workflow integration ( ---------- , n8n)
Daily performance reporting: inbox rate, domain reputation, spam/trap indicators
Emergency triage when inbox placement drops

Your mandate: Maintain ?50% inbox placement at high volume and scale sending without triggering reputation loss, throttling, or domain burnouts.

REQUIRED EXPERIENCE (Non-negotiable)
You must have hands-on experience doing all of the following:

3+ years owning outbound systems sending 100k–1M+ emails/week
Built multi-domain / multi-ESP sending systems from scratch
Personally configured SPF, DKIM, DMARC, MX, tracking domains
Designed and executed domain warmups (new ? warmed ? rotation ? retirement)
Deep practical understanding of Gmail, Outlook, Yahoo filtering systems
Diagnosed and fixed inbox placement drops (Gmail Tabs, spam placement, throttling, IP reputation collapse, blocklist triggers)
Experience with: Instantly, Smartlead, Lemlist, Mailgun, Amazon SES, SendGrid
Automation integrations ( ---------- , n8n, Zapier)

Ability to interpret and act on:

Gmail Postmaster Tools
Microsoft SNDS
Spamhaus/Spamcop signals
Seed test results (GlockApps, Folderly, InboxAlly)

Can explain, in technical detail, the difference between:

Reputation-based filtering
Content-based filtering
Engagement-based filtering
Heuristic vs. ML filtering (Gmail)

If you cannot explain this clearly, you will not pass the assessment.
If you've only worked on customer lists or relied on platform defaults, this role is not for you.

WHO SHOULD NOT APPLY
Do not apply if:

Your largest volume was under 50k/week
You've never built a multi-domain system
You rely on tutorials, agencies, or platform presets
You've never run a domain warmup schedule yourself
You think deliverability = "avoid spam words"
You've never fixed a Gmail reputation crash
You cannot explain why inbox placement drops and what root factors caused it
You've only sent to fully-warm or opt-in lists
You need supervision or detailed task instructions
You cannot produce proof of past sending volume (e.g., Postmaster screenshots, ESP dashboards, warmup logs)

TO APPLY
Include in your application:

Total years managing 100k+/week volume
Largest weekly send you've personally operated
One deliverability crisis you diagnosed and recovered from (4-5 sentences: what broke, root cause, your fix, outcome)
Tools/platforms you've used at scale
Screenshot of a sending system you personally operated (any ESP: volume view, reputation metrics, Postmaster Tools, or SNDS)

Applications missing this information will not be reviewed.

HIRING PROCESS
Step 1: Application review
Step 2: Technical assessment (90 min — architecture design + diagnostics)
Step 3: Technical interview (60 min)
Step 4: Reference checks

Only candidates who pass the technical assessment will be interviewed.

Must have: at minimum moden high performance computer, dual 24" or better monitors, high quality headset with boom mic, HD reliable webcam, and reliable redundant high-speed internet