System Engineer | Email Team

JOIN THE TEAM BUILDING AN AI-FIRST COMPANY. Hostinger serves more than 5.5 million clients across 150 countries, but we're still excited about what we're creating next. AI is changing how we build products, support customers, work together, and solve problems. It helps us move faster, spend less time on repetitive work, and focus on bigger ideas. If you want your work to influence both what we build and how we build it, we'd like to meet you. Our culture: Guided by 10 company principles https://www.hostinger.com/principles YOUR ROLE AT HOSTINGER As System Engineer, you'll join one of the few places left where a single team owns the whole stack end to end - compute, storage, networking, and the services running on top of it. Email is what makes that infrastructure hard: it's stateful, latency-sensitive, adversarial, and it never stops. You'll join at a point where large parts of the platform are being modernized, so there's genuine architectural work ahead, not just maintenance of someone else's decisions. This isn't a role where you follow playbooks - you'll write them. Curious to learn more? Connect with your team: Edgaras Lukoševičius, Engineering Manager, Email Hosting. https://www.linkedin.com/in/edgaras-lukosevicius/ YOUR DAY-TO-DAY - Build and scale the infrastructure behind the service. Design and operate the systems that carry millions of messages a day — compute, networking, routing, and throughput — at a volume where a fraction of a percent is thousands of clients. - Run storage at scale. Petabytes of customer data across a distributed storage fleet: capacity planning, performance tuning, backups, and data integrity. - Automate everything you touch. Our infrastructure lives in code. If you did it manually twice, the third time should be a pull request. - Engineer how we ship. Build the testing and deployment pipeline that lets a platform this large change safely — infrastructure tests, preflight checks, progressive rollouts. Confident releases are an engineering achievement, not an accident. - Own monitoring and observability. Metrics, logs, SLOs, and alerting — build the systems that surface a problem while it's still small, so it's solved before anyone notices it. - Fight spam and abuse. Tune the filtering engines, rate limits, and authentication that stand between millions of mailboxes and everyone trying to get into them. - Solve problems at the root. When something surfaces, the interesting question isn't how to close the ticket — it's what change makes that entire class of problem stop happening. - Share what you learn. Review code, write the runbook, explain the failure mode. The team gets stronger, or it doesn't scale. WHAT WILL HELP YOU SUCCEED - Strong Linux experience (5+ years) — deep and hands-on, not just comfortable at a shell. - On-prem and cloud. We run most of our systems on our own hardware, with parts in the cloud (GCP, AWS, Cloudflare). We're looking for either a 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. You trust automation, and know how to do it right. - Programming or scripting in Go or Python (bonus if both). Occasionally Lua or Rust show up too — we're happy to lean on AI for the long tail. - Production experience with databases, caches, and queues — MySQL, PostgreSQL, Redis/Valkey, Memcached, or similar. - Containers and orchestration — you've experience running workloads on Kubernetes and Docker - Storage fundamentals — filesystems, distributed storage, replication (Ceph or similar) is a plus - Networking fundamentals — DNS, TCP/IP, TLS, HTTP, and routing. NICE-TO-HAVES - 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. MEET YOUR TEAM You’ll join the Email Team. The team owns Hostinger’s entire email platform end to end - inbound and outbound mail delivery, storage, spam and abuse defense, and the automation behind all of it - powering millions of client mailboxes. You’ll work most closely with a tight-knit mix of system engineers, backend and frontend developers, and QA engineers, all building and running the same platform from different angles - infrastructure, product, and quality meeting in the same codebase. Because email underpins so much of the business, the team also works closely with Customer Support on investigating issues escalated by clients, and with Security, Network, Storage, and other infrastructure teams across Hostinger on keeping the platform safe and reliable. BENEFITS YOU'LL LOVE 🚀 360° Growth: You'll never stop learning here. Get access to Reforge https://www.reforge.com/ and CoachHub, go to global conferences, and borrow from our physical and digital libraries. Depending on your location, you can mentor or be mentored through TesoXchange https://tesoxchange.com/. People give each other open feedback https://www.hostinger.com/blog/reaching-your-peak/, share what they know https://www.hostinger.com/blog/learning-culture/, and take on new projects as their skills grow. 🎯 Freedom & responsibility: Work where you do your best work: our offices in Vilnius, Kaunas, Jakarta, or Luxembourg, your home, or anywhere in the world. You plan your own day and own your results, and good ideas go live fast. 💪 Wellness simplified: Your wellbeing comes first. You get time off to recharge, a Headspace https://www.headspace.com/ subscription, and events focused on wellbeing. Depending on your location, you also get health insurance from day one, a gym membership, regular health checks, and clubs for sports, arts, and hobbies. 🎉 Work hard – play hard: We celebrate wins together at Summerfest https://www.youtube.com/watch?v=CPnIDaaq0jc & Winterfest https://www.youtube.com/watch?v=AfytsnQyE2I, Town Halls, team-buildings, and workations. Meet the Client sessions connect you directly with the people you build for. Milestones outside work matter too, so we celebrate weddings, new parenthood, and graduations with you. Compensation starts from €5,000 gross/month, depending on your experience and skills. We’re always looking for experienced talent to raise the bar. If you’re excited about the role but the listed compensation range doesn’t align with your expectations, we still encourage you to apply - we’re open to adjusting it based on the impact and value you bring. Get ready to take your personal and professional growth to new heights! Join Hostinger today and be part of our journey 🚀 Three. Two. Onboard