System Engineer, Email Team

Stack

Responsibilities

• ▹Build and scale the infrastructure behind the email service
• ▹Design and operate systems carrying millions of messages a day: compute, networking, routing and throughput
• ▹Run storage at scale: capacity planning, performance tuning, backups and data integrity
• ▹Automate everything: the infrastructure lives in code
• ▹Build the testing and deployment pipeline: infrastructure tests, preflight checks, progressive rollouts
• ▹Own monitoring and observability: metrics, logs, SLOs and alerting
• ▹Fight spam and abuse: tune filtering engines, rate limits and authentication
• ▹Solve problems at the root
• ▹Share knowledge: review code, write runbooks, explain failure modes

Requirements

• ▹Strong Linux experience (5+ years)
• ▹Strong on-prem and virtualization background (Proxmox, KVM, bare metal) with cloud exposure, or a strong cloud background with real hands-on on-prem experience
• ▹Infrastructure as Code: Ansible, Terraform or equivalents
• ▹Programming or scripting in Go or Python (bonus if both)
• ▹Production experience with databases, caches and queues: MySQL, PostgreSQL, Redis/Valkey, Memcached or similar
• ▹Containers and orchestration: Kubernetes and Docker
• ▹Networking fundamentals: DNS, TCP/IP, TLS, HTTP and routing

Nice to have

• ▹Hands-on experience with an MTA at scale (Postfix, Exim, KumoMTA, GreenArrow, PowerMTA, ZoneMTA or similar)
• ▹Experience running an IMAP/mail store (Dovecot, Cyrus or equivalent)
• ▹Spam filtering and email security tooling (Rspamd, SpamAssassin or similar)
• ▹Understanding of email authentication and deliverability (SPF, DKIM, DMARC, ARC, rDNS, blocklists, feedback loops)
• ▹Experience with IP reputation, warmup or high-volume sending
• ▹Familiarity with data pipeline and analytics tooling (ClickHouse, Kafka/Redpanda, Flink)
• ▹CI/CD beyond GitHub Actions and open-source contributions
• ▹Certifications like RHCSA or RHCE
• ▹Storage fundamentals: filesystems, distributed storage, replication (Ceph or similar)

Soft skills

What we offer

• ▹Growth: access to platforms like Reforge and Coach Hub, global conferences, physical and digital libraries, a feedback culture, mentoring through TesoXchange and internal mobility
• ▹Flexibility: modern offices in Kaunas and Vilnius, work from home or from anywhere in the world, flexible schedule
• ▹Wellness: insurance from day one, gym memberships, recharge leave, Headspace subscriptions, regular health checks, sports, arts and hobby clubs
• ▹Company events (Summerfest, Winterfest, Town Hall, Meet the Client, team-buildings, workations), access to the Žalgiris Arena VIP Lounge and milestone gifts for weddings, new parenthood and graduations
• ▹Gross salary starting from 5000 EUR, depending on experience and competencies

About the company

Hostinger has 900+ professionals and over 4 million clients in 150 countries, and provides tools that help creators and small businesses succeed online faster and easier.