# Engineering Team Lead - Email Security (Imunify Email & Email Gateway) (remote) > Cloudlinux · Warsaw, Poland (Remote) · Full-time · Posted 2026-08-05 **Workplace:** remote **Department:** Imunify360 ## Description **CloudLinux** is the maker of **Imunify360** — a suite of security products protecting millions of websites across the web hosting industry. Our email security line covers both sides of the email problem for hosting providers: an inbound anti-spam engine integrated with hosting control panels, and an outbound SMTP gateway that protects sender reputation and keeps legitimate mail out of the spam folder. We are looking for an **Engineering Team Lead** to run the team that builds and operates this product line. You will lead a small, senior, fully remote squad (currently 7–8 people: Go and Python engineers, a deliverability engineer, an anti-spam engineer, and data analysis/annotation) and be accountable for what the team ships, how reliably it runs, and how the people on it grow. This is a **hands-on lead role**, not a pure people-management role. Expect roughly 60% leadership (delivery, technical direction, coaching, incident command) and 40% hands-on engineering (design reviews, code review, spikes, production debugging). You are not expected to be the top individual contributor on the team — you are expected to be able to read every part of the system and hold a credible technical opinion about it. You don't need to arrive as an email expert. If you have led engineers in an adjacent technical domain — infrastructure, networking, security, messaging, anti-abuse — and have a track record of getting deep into complex technical territory fast, we will teach you the email side. ### The system you would inherit - **Inbound filtering:** an Rspamd-based engine with a trained rule/ML model, released on a regular retraining cycle and measured on spam catch rate and false-positive rate. - **Outbound gateway:** a Halon-based SMTP relay with per-domain warm-up ladders, rate limiting, quarantine, feedback-loop (ARF) processing, and a customer portal — Go services on bare metal. - **Panel integrations:** cPanel/WHM, Plesk, DirectAdmin, plus Debian/Postfix deployments for large hosting partners. - **Data plane:** Elasticsearch, Redis, Grafana dashboards and alerting, corpus and annotation pipelines feeding model training. - **Delivery:** GitLab, Jenkins, Jira, weekly release cadence, blameless post-mortems within 24 hours. ### What you will own **Delivery:** - Turn the product backlog into a credible, sequenced engineering plan — estimates, dependencies, and a release train the team actually hits. - Run the team's weekly cadence: planning, release readiness, status reporting with real numbers rather than adjectives. - Own engineering quality gates for model releases: no detection model ships without a measured catch rate and false-positive deltas against the previous model, and a rollback path. - Keep technical debt visible and funded — negotiate it into the roadmap rather than absorbing it silently. - Report delivery status and risk to engineering leadership weekly; every item carries an owner and a due date. **Technical direction:** - Own the architecture of the email stack together with the architecture group: review designs, write and approve ADRs, and make build-vs-buy calls with explicit trade-offs. - Review code and designs on the critical path — mail flow, rate limiting, quarantine, authentication — and set the bar for tests, observability, and safe rollout. - Own production health: SLOs, alerting, capacity, and the deliverability posture of our sending infrastructure (IP reputation, SPF/DKIM/DMARC, rDNS, RBL listings). - Act as incident commander for product-impacting events: coordinate remediation across teams, keep partners informed, and author the post-mortem within 24 hours with named owners and dates. **People:** - Lead a distributed team across the globe: 1:1s, goal setting, performance reviews, and career development. - Hire: define the profile, run technical interviews, onboard, and mentor engineers - Set the working agreements that make async work — written decisions, public-by-default communication, durable artifacts over meetings. **AI-augmented engineering:** We evaluate engineers here partly on how effectively they work with coding agents. As the lead you are expected to model and coach this: prompt specificity, review quality on agent-generated code, tool-boundary awareness, context provision, iteration effectiveness, error recovery, and end-to-end task completion. The team has already scaffolded its repositories for agent-assisted development; extending that to the model and rule pipelines is live work. **Working with the Product Owner:** - The Product Owner sets priorities, owns partner commitments and the roadmap narrative. You own the plan to deliver them and the technical risk in doing so. - Escalate scope-versus-capacity conflicts early and in writing, with at least two mitigation options. ### First 90 days: - **30 days:** Own the release train and the weekly status; be able to trace an inbound message and an outbound message end to end through the stack; complete 1:1s with every team member and produce a written read on the team's strengths and gaps. - **60 days:** Own on-call and incident command for the product line; publish the current SLOs and the top three reliability risks with mitigations; land at least one non-trivial change yourself. - **90 days:** Present a technical roadmap for the email stack agreed with the PO and the architecture group, including a debt-paydown line item and a staffing recommendation. ## Requirements **Must have:** - 5+ years as a software engineer, with 2+ years leading a team of engineers (team lead, tech lead with people responsibility, or engineering manager) in a product company. - Strong hands-on Linux background; comfortable reading and reviewing production code in Go and/or Python, and debugging live systems on the box. - Track record of shipping and operating a distributed backend service under real production load — you have carried a pager and run incidents. - Experience mastering a complex technical domain quickly and making credible architectural decisions in it. - Practical fluency with observability and data tooling to judge quality yourself, not via reports (Grafana, Kibana/Elasticsearch, Redash or equivalents). - Demonstrated people leadership: 1:1s, performance conversations, hiring, and growing engineers. - Experience working in an agentic / AI-assisted development workflow, or a clear appetite to lead one. - Professional proficiency in English, written and spoken. - Availability to work EU hours. **Nice to have:** - Working knowledge of email infrastructure: SMTP, SPF/DKIM/DMARC, rDNS, IP reputation and warm-up, RBLs, feedback loops. - Experience with open-source mail stacks — Rspamd, SpamAssassin, Postfix, Exim, Halon — or the web hosting ecosystem (cPanel/WHM and other control panels). - Exposure to the ML model lifecycle: training data quality, evaluation metrics, and the trade-offs in tuning detection systems. - Experience running incident and escalation management with external partners. ## Benefits **What's in it for you** - A focus on professional development - Interesting and challenging projects - Fully remote work with flexible working hours — schedule your day and work from any location worldwide - Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leave - Compensation for private medical insurance - Co-working and gym/sports reimbursement - Budget for education - The opportunity to receive a reward for the most innovative idea that the company can patent _By applying for this position, you consent to the processing of your personal data as described in our Privacy Policy (_[https://cloudlinux.com/legal/privacy-policies-hub/](https://cloudlinux.com/legal/privacy-policies-hub/)_), which provides detailed information on how we maintain and handle your data._ ## Apply [Apply at Cloudlinux](https://apply.workable.com/cloudlinux-1/j/843A5B89A3/apply) --- Powered by [Workable](https://www.workable.com)