Senior II Security Engineer - Platform

Senior II Security Engineer - Platform LocationKyivEmployment TypeFull timeLocation TypeHybridDepartmentEngineeringWe power people’s progress.At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.Meet the team!The Security team partners across the company to help Preply grow safely and sustainably. We are responsible for platform security, application and product security, security operations, and incident response. We work closely with SRE, Data teams, Engineering teams, and our GRC function to make security practical, measurable, and scalable.We work in small teams, which means you’ll have high ownership, real influence on technical decisions, and the opportunity to drive meaningful improvements across the company. We promote self-direction, strong collaboration, and a culture where trust and clear communication matter.We’ve reached 90%+ adoption of AI coding tools across engineering, and we’re now moving towards more autonomous, AI-Augmented development at scale. At Preply, engineers have direct access to the best tools available, with the freedom to use them fully and experiment as they build.We have diverse technical challenges that will allow you to develop your skills across the stack - sometimes we write about them in our Engineering Blog! Please, also visit our Tech Radar and our YouTube channel to learn more about the technologies we use at Preply!What you’ll be doing:Own platform security across AWS, Kubernetes, and GCP, with a strong focus on detection, alerting, and incident response readinessLead key platform security initiatives end-to-end, from problem definition through rollout and iterationAct as a strong technical voice in defining how platform security is designed, implemented, and operated at PreplyEvolve our monitoring from “we have a SIEM” to a detection and response capability that is effective, trusted, and actionableWork hands-on with our current tooling, including Datadog as our SIEM, Okta as our primary IdP, and a range of SaaS platformsDrive cross-functional platform security initiatives from problem definition to production rollout, partnering with SRE, Data, Engineering, and GRCStrengthen cloud and platform security across AWS and Kubernetes, with expanding scope in GCP, through practical guardrails, secure patterns, and automationImprove the robustness of access to internal infrastructure, including identity, privileged access, and auditabilityImprove security of Kubernetes deployments, including cluster and workload security, policy enforcement, and secure workload identity patternsMature detection and response capability using DatadogImprove log coverage and data quality (cloud, Kubernetes, CI/CD, identity, and key SaaS)Build and tune actionable detections with clear severity, ownership, and expected frequencyReduce noise through correlation, deduplication, enrichment, and continuous tuningEstablish repeatable triage workflows and clear escalation paths, being part of the Security on-call rotationsCreate investigation playbooks and runbooks so alerts can be handled consistently and quicklyPartner with Data teams to improve monitoring for suspicious activity and sensitive access patterns, with an...