Senior Systems Engineer - Delivery DevOps

Overview

At Intuit, we're building a culture that rewards curiosity, risk-taking, and imaginative thinking, and we look for engineers who fold AI and emerging tech into their daily work to solve real customer problems. Mailchimp is a leading marketing platform for small businesses, helping millions of customers around the world build their brands and grow their companies. Our Delivery team owns the systems that send our customers' email at massive scale, millions of messages a day, and keeps that infrastructure fast, reliable, and healthy.

We're looking for a Senior Systems Engineer on the Delivery team to help build, operate, and scale the platform behind Mailchimp's sending infrastructure. That platform includes our in-house Postfix-based MTA (NeoMTA), the PHP server-agent service that routes campaign and transactional mail to it (MCMTA), and the fleet of AWS-hosted MTA servers that carry the load. This is a hands-on systems and infrastructure role.

You'll own the health of the sending fleet end to end, from the Linux hosts and MTA software up through the deployment pipelines, autoscaling, monitoring, and the AWS environments the platform runs on.

You'll do well here if you're a self-directed engineer who is comfortable in production and on the command line, enjoys the trade-offs of running a mature, high-throughput platform, and thinks in terms of systems, fleets, and reliability rather than single applications. You should understand enough of the deliverability world (reputation, authentication, receiver behavior) to make sound infrastructure decisions, but your center of gravity is systems and cloud engineering.

We're looking for a detail-oriented, collaborative communicator who can self-prioritize, so urgent operational issues get handled while longer-term platform work keeps moving. And you're comfortable with AI-native ways of working, using AI and agent tooling to make both yourself and the team more effective.

This is an individual-contributor role. It has no direct reports or managerial duties, and your impact comes through your own engineering work and your influence on the team.

• Design, build, and operate the AWS cloud infrastructure the platform runs on, managing the sending fleet across AWS environments, including AMI and image build pipelines, instance and capacity management, autoscaling, and running the fleet cost-effectively.
• Develop and manage Infrastructure-as-Code (for example, Terraform, Ansible, or Puppet) to provision, configure, and maintain scalable, secure server and network environments.
• Design and manage system architecture across the sending path, including networking, load balancing, and security configuration, to keep production applications and services healthy.
• Design, implement, and maintain the CI/CD pipelines and release automation behind the platform (Jenkins, Artifactory and RPM packaging, containerized services, and Kubernetes/ArgoCD-based delivery), automating deployment workflows so releases to production are reliable, repeatable, and secure.
• Configure and maintain containerized environments (Docker, Kubernetes) for application deployment, scaling, and orchestration.
• Configure and tune MTA software and host-level parameters to manage throughput, queueing, and delivery behavior across the fleet.

• Take part in an on-call rotation, available to handle Delivery-related operational issues outside normal business hours, to keep the platform up and the business running.
• Monitor production systems and infrastructure for performance, availability, and security, and own the metrics, dashboards, and alerting that give the team and stakeholders visibility into fleet and sending health (for example, Big Query, Open Search, and Splunk).
• Respond to fleet, host, and delivery incidents, diagnosing issues that span the MTA software, the hosts, the AWS environment, and the network.
• Write scripts and automation tooling to streamline infrastructure provisioning, system configuration, and operational processes, and to support performance tuning across the fleet.
• Take full responsibility for…