Mission Inbox empowers businesses to take back control of their email deliverability with an all-in-one infrastructure platform. We move fast, think outside the box, and solve problems with urgency. Our team is made up of founding engineers and driven builders — we set the bar high.
We need a Systems Architect who is both a builder and a strategist. You won’t just make things fit within current limitations — you will point them out, challenge them, and design ways to remove them. This is about building for scale: we are at 50M emails/month today, but we’re months away from needing to support 600M/month.
This is not a hands-off role. You will design, plan, teach, and execute while working hand-in-hand with our developers and CTO.
- Architect, configure, and optimize email infrastructure:
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Dovecot (IMAP/POP3 servers)
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MTAs (Postfix, KumoMTA, Postal, PowerMTA or similar)
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Full mail server setup, scaling, and hardening
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Collaborate with developers — understand their code, integrate with their workflows, and guide them technically.
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Challenge existing systems, identify limitations, and propose structural changes to eliminate them.
Build for scale — from 50M- 600M emails/month and beyond.
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Work with the CTO to define long-term infrastructure architecture and lead its execution.
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Mentor engineers, ensuring knowledge transfer and adoption of best practices.
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Take ownership of system reliability, scalability, and performance.
- Expert-level, hands-on knowledge of:
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Dovecot setups (configurations, optimizations, advanced deployments).
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MTAs (Postfix/Exim/etc.).
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End-to-end email server environments.
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Strong coding background (Python preferred; other languages welcome).
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Ability to collaborate with software engineers and speak their language.
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Proven experience designing and scaling production-level infrastructure.
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Linux systems administration mastery.
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A problem-challenger mindset — not just fitting into limitations but tearing them down to build better.
- Within 2 weeks: You’ve fully onboarded, studied our systems, and are mapping out improvements.
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Within 1 month: You’re delivering measurable impact (resolving infrastructure issues, identifying bottlenecks, proposing scalable solutions).
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Ongoing: You’re the authority for email infrastructure, driving our evolution from tens of millions to hundreds of millions of emails per month.
- Thrives in fast-paced, high-expectation environments.
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Sees challenges as opportunities to innovate.
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Direct, vocal, and committed — we value bold thinking.
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Treats remote work with full accountability and commitment.
