Senior Systems Engineer (SRE)

About the role

Seedtag, a neuro-contextual advertising company founded in 2014, is looking for a Senior Systems Engineer to join its tech team. The role supports the Platform Engineering (SRE) team, builds and runs the internal developer platform and keeps the cloud foundations reliable, secure and compliant.

Key responsibilities

• Set direction with engineering teams and build platforms that improve customer experience, while supporting the SRE team's growth and performance.
• Ensure reliability, security and compliance of cloud foundations aligned with the Google Cloud Architecture Framework and NIST/ISO controls (logging, vulnerability and secrets management, hardening, backup and restore).
• Design, build and operate the internal developer platform (GKE, networking, IAM, CI/CD, GitOps) so product teams can ship autonomously.
• Take part in the on-call rotation, lead incident response and write blameless postmortems.
• Share knowledge, review peers' work and raise the bar on engineering practices.
• Own the observability stack (VictoriaMetrics, Grafana, alerting, PagerDuty), define SLIs/SLOs and a service maturity model.
• Drive cost efficiency (FinOps): capacity planning, right-sizing, quota management and cost anomaly detection.
• Reduce toil by replacing tickets with tools, golden paths and reusable CI/CD workflows, and keep runbooks fresh.
• Apply AI to platform operations: build and operate agents and automations, define MCP integrations and contribute to AI governance with Security.

Required profile

• Minimum 4 years of experience in SRE/DevOps/Platform/Cloud Engineering roles, preferably in large-scale, high-traffic products.
• Proven on-call and incident management experience, with root-cause analysis and blameless postmortems.
• Service-oriented mindset, able to prioritize across several concurrent projects in a fast-paced environment.
• Experience with Kanban or Scrum, and with LLM-based agents or automations.

Required skills

• Python, Go or similar for scripting and automation.
• Google Cloud Platform (GCP) or an equivalent hyperscaler, including networking, IAM, GKE and migrations.
• Kubernetes (ideally GKE), Terraform (Terraform Cloud a plus) and GitOps (ArgoCD).
• Prometheus-compatible observability (VictoriaMetrics, Grafana) and alerting design.
• Cloud security basics: secrets management, vulnerability remediation, hardening and least privilege.
• Streaming platforms (Kafka/Redpanda), databases (MongoDB, Redis), Cloudflare, and FinOps/capacity planning.

What we offer

• Flexible work model: 100% remote or hybrid, with remote contracts in Spain, Italy, UK, Belgium, Netherlands, France and Germany.
• Learning platform and optional language classes.
• Home office setup budget up to €1,000 and paid trips to the Madrid HQ.
• MacBook Pro M3 and a supportive, trust-based culture.