Job Title

Position: Email Infrastructure & Deliverability ArchitectExperience: 7+ YearsEngagement Type: Full-timeWork Location: MumbaiStart Date: ImmediateCompensation: As per experience (Senior / Principal level)About the RoleWe’re looking for a senior, hands-on Email Infrastructure & Deliverability Architect to design, own, and scale our complete email ecosystem. This role goes far beyond running SMTP servers or monitoring inbox rates—you will architect systems that anticipate ISP behavior, protect sender reputation, and scale across products without deliverability collapse.You will be the single point of ownership for how emails are sent, from where, using which IPs and domains, under what rules, and how the system evolves as volume and product complexity grow.Core Technologies & Skills RequiredEmail Infrastructure & Architecture:Large-scale SMTP architecture and system designHigh-availability, fault-tolerant email infrastructureInfrastructure segmentation for transactional, marketing, and system emailsCapacity planning and future-proof architecture designSMTP & Messaging Systems:Deep expertise with Postfix, Exim, PowerMTA, or similar SMTP serversAdvanced SMTP protocol knowledge and tuningTLS, HELO/EHLO, rDNS configurationIP, Domain & Reputation Management:Dedicated IP acquisition, warming, rotation, segregation, and retirementIP pool design aligned with risk profiles and product use casesDomain reputation management and lifecycle controlBlacklist prevention, detection, and recoveryDeliverability & ISP Intelligence:SPF, DKIM, DMARC architecture and enforcementISP behavior modeling (Gmail, Outlook, Yahoo, enterprise ISPs)Bounce analysis, throttling behavior, spam complaint handlingFeedback loop monitoring and proactive mitigationProduct-Level Email Architecture:Designing application-to-SMTP interaction modelsRate limiting, retries, fallback routing, and sender identity rulesGuardrails to prevent misuse by product or marketing teamsDeliverability-safe product launch planningGovernance & Documentation:SOP creation and architectural documentationInternal best-practice frameworksLong-term governance over email usage across teamsIdeal Candidate7+ years of hands-on experience in email infrastructure, messaging systems, or large-scale SMTP environments.Proven experience architecting end-to-end email platforms—not just operating them.Deep understanding of ISP filtering algorithms and sender reputation systems.Experience managing high-volume dedicated IP pools across multiple products.Strong system-level thinking with a focus on risk, scalability, and long-term stability.Comfortable acting as the final technical authority for email-related decisions.Key ResponsibilitiesArchitect and deploy scalable, high-availability SMTP infrastructure optimized for inbox placement.Own IP and domain reputation strategy end-to-end, including warming and lifecycle management.Define and enforce deliverability best practices across all teams and products.Work with product teams to architect email flows, not just execute sends.Design safeguards to ensure new features or campaigns do not damage global deliverability.Monitor ISP signals, feedback loops, and reputation metrics proactively.Create and maintain documentation, SOPs, and architectural standards.Act as the final decision-maker on all email infrastructure and deliverability matters.