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Email Deliverability Engineer

Full-Time
Fully_Remote
Argentina, Chile, Colombia, Mexico, Peru, Uruguay, Brazil

Summary of the Role

We are looking for an Email Deliverability Engineer (Backend) to own how a high-volume customer support platform sends, receives, and processes email. Email is at the core of the product: when messages bounce, get blocklisted, or fail to deliver, customers' support operations break down. Working within the core infrastructure team, you will operate and tune mail transfer agents, protect sender reputation, resolve authentication and blocklist issues, and build the scripts and internal tools that keep email flowing. The role is open to two profiles: infrastructure / deliverability specialists (SysAdmin, SRE, Postmaster or Abuse backgrounds) who write automation scripts, and backend engineers who have built and operated their own email sending and queuing systems.

Desired Skills

  • Full-Time availability
  • English B2 or above
  • 4+ years of experience in infrastructure or backend engineering
  • Hands-on experience building, running, or troubleshooting outbound (sender-side) email delivery systems, not just advising on them
  • One of these two backgrounds: operating Mail Transfer Agents (Postfix, PowerMTA, Exim, KumoMTA), resolving blocklists and managing sender reputation hands-on; or architecting, building and operating your own email sending and queuing systems from scratch (beyond basic API wrappers)
  • Deep understanding of SMTP, MIME structures and email authentication protocols: SPF, DKIM, DMARC and ARC
  • Experience with DNS and DNS record management
  • Proven experience investigating why emails land in spam, resolving RBL/DNSBL listings, configuring feedback loops and diagnosing bounce logs
  • Real ability to write code (Python, Go, PHP or Shell) to automate checks, parse email headers and build internal delivery tools
  • Track record of owning and resolving production email delivery outages

Responsibilities

  • Operate, maintain, and tune MTAs (Postfix, PowerMTA, Exim, KumoMTA) to process and send millions of transactional and support emails
  • Investigate deliverability drops, manage IP and domain reputation, monitor feedback loops (FBLs), and remediate blocklisting incidents (Spamhaus, Barracuda, Microsoft SNDS)
  • Configure, validate, and troubleshoot complex customer SPF, DKIM, and DMARC alignment failures
  • Manage bounce classifications, retry logic, rate-limiting rules per receiving ISP / mailbox provider, and dead-letter queues
  • Write pragmatic scripts, tools, and API connectors (Python, PHP, Go, Bash or similar) to automate deliverability monitoring, header inspection, and log analysis
  • Participate in on-call rotations to triage and fix high-priority email delivery disruptions

Nice-to-Haves

  • Experience working inside an Email Service Provider (ESP) or a high-volume transactional messaging platform
  • Experience running KumoMTA, PowerMTA, or Halon
  • Daily use of AI tools to parse complex email headers and server logs

Who You Are

  • You are a root-cause troubleshooter who enjoys dissecting email headers and bounce logs to find exactly why a message was dropped
  • You communicate clearly during incidents and can explain deliverability issues to non-technical support agents and clients, even under pressure
  • You are genuinely interested in the niche world of email deliverability and sender reputation

Some benefits:

  • 🏢 Offices in some cities
  • 🖥️ 100% remote work
  • ⌚ Full-time schedule, flexible according to objectives
  • 🏖️ PTO & holidays
  • ⚕️ Medical insurance

About Howdy

Howdy.com, founded in 2018 and headquartered in Austin, Texas, helps US companies who want to hire, manage, and retain their teams in Latin America (LatAm) directly but need help with multinational logistics, contracts, compliance, and culture. Companies that use Howdy.com get the best talent available in LatAm and gain access to an entire network and a thriving community of professionals who are changing the world. By partnering with Howdy.com, companies can expand their physical presence into some of the fastest-growing economies in LatAm.

Howdy.com is a member of Y Combinator and has garnered significant support from prominent investors, including Greycroft and Obvious Ventures. The company raised over $20 million in a series A venture capital round.

Our core values

#1 Sports Team: At Howdy, we win together. From players to support, everyone is vital to our success. We hire for excellence, prioritize teamwork, and strive for continuous improvement. We collaborate, seek advice, and actively contribute to Howdy's victories.

Altruism: Demonstrating altruism involves prioritizing the team and assuming the best in others. We communicate openly, provide honest feedback, and extend grace. Altruism is selfless service, focusing on supporting our players and team growth.

Curiosity: Being curious at Howdy means having the willingness to learn, adapt, and explore new ideas. We question existing beliefs, embrace humility, and see curiosity as our superpower. Demonstrating curiosity involves researching unfamiliar tasks, asking questions to understand the full picture, and seeking better ways to complete routine tasks.

Have Spirit: Having spirit at Howdy is about celebrating wins, building a sense of community, and bringing positivity. Demonstrating spirit involves attending events, getting to know teammates, participating in challenges, and proudly wearing the Howdy swag. Simply put, it's about bringing a super-fan spirit to work every day.