Senior Technical Operations Engineer - Email, Mautic & Data (Remote, Spain)

Metricool

1d•Remote

About The Position

At Metricool, we are seeking a Senior Technical Operations Engineer with a passion for servers, databases, networking, and large-scale email delivery. This role offers real ownership and the opportunity to shape our systems. You will work 100% remotely within a high-growth international B2B SaaS company, collaborating with a team dedicated to supporting Community Managers. Your primary mission is to become the specialized owner of our Mautic infrastructure (hosted on AWS, sending through Amazon SES), working closely with your technical lead, Borja, and partnering with Marketing, Product, Data, and Revenue teams. The goal is to transition from a reactive, firefighting approach to a stable, scalable system. In the medium term, you will also contribute to building our data platform and attribution efforts.

Requirements

Must be located in Spain.
At least 5 years of experience in systems, infrastructure, or technical operations.
Knowledge of a senior technical support specialist at a hosting company, covering servers, Linux, DNS, infrastructure, networking, traffic, email sending, domain reputation, and security.
Proven experience administering and optimizing MySQL databases under heavy load.
Mandatory English proficiency (minimum B2).
PHP skills.
Strong service mindset.
Ability to understand the needs of non-technical teams and communicate clearly.
Ability to stay calm and curious under a high volume of requests.
Genuine curiosity and passion for how the Internet works, backed by solid hands-on fundamentals.
Collaborative and low-ego attitude.

Nice To Haves

Spanish language proficiency.
Symfony experience.
Experience with AWS (EC2, SES).
Experience managing email-sending infrastructure.
Experience with Mautic.
Experience with RabbitMQ, Aerospike, ClickHouse, and data pipelines.
Experience with Go.
Experience using AI tools to write and maintain code.

Responsibilities

Optimize servers, heavy MySQL databases (slow queries, indexes, table maintenance, historical data cleanup), and queues (RabbitMQ) for a large Mautic instance sending millions of emails daily.
Improve Mautic processes (segment synchronization, campaigns, sending jobs, crons) to ensure daily segment updates and fast sends.
Monitor sends, queues, and servers to detect and fix issues before they impact campaigns, and scale the platform to handle ~3M emails/day without outages.
Ensure smooth deliverability (SPF/DKIM/DMARC, bounces, complaints) through occasional fine-tuning.
Handle and triage requests and bug reports from Marketing and Product via Slack, including reproduction, fixing, explanation, and follow-up.
Respond to incidents during sends, with expected availability when a send is failing (no formal on-call, but backup is available).
Maintain and evolve Mautic's custom code (PHP/Symfony plugins and modules), utilizing AI tools for support.
Document the architecture, runbooks, and fixes.
Contribute to the data platform (ClickHouse, Python export pipelines, Go services, Aerospike) and attribution in the medium term.
Collaborate closely with Marketing, Product, Data, and Revenue teams, turning tickets and complaints into lasting fixes.
Share knowledge, document fixes and runbooks, and help the team move towards a stable, scalable system.
Work with the technical lead, Borja, supporting a feedback-driven, service-minded environment.