Who we are TRLLN is building the future of asset intelligence.
Our Tracking-as-a-Service (TaaS) platform combines a proprietary IoT mesh network, telemetry, and advanced analytics to deliver real-time visibility over physical assets --- track any asset, anywhere --- with no gates, readers, or fixed infrastructure.
Born inside IFCO , the global market leader in reusable packaging containers for fresh food, TRLLN is now a standalone subsidiary of IFCO : engineered for the world's largest reusable-asset network --- 400 million assets across 50+ countries --- and combining that proven, industrial scale with the agility and focus of a tech company, from our Barcelona HQ .
What environment will you be joining?
As a Senior Site Reliability Engineer at TRLLN , you'll join the product engineering team that builds and runs the core of our platform : the backend and infrastructure that ingest, process, and serve high-volume IoT telemetry in near real time, on a multi-tenant, cloud-native architecture on Google Cloud --- GKE, Cloud Run, Managed Kafka, Pub/Sub, AlloyDB and BigQuery, all managed with Terraform. You will be our first dedicated reliability role . Today reliability is everyone's job and nobody's specialty: the team has strong software engineering foundations, an observability stack we are actively maturing, and availability commitments to customers that we want to back with real SLOs, alerting and runbooks . Your job is to turn that into a reliability practice --- and to make the engineers around you better at operating what they build.
Security is a big part of this role.
The platform goes through external security assessments and is preparing for the EU Cyber Resilience Act ; the operational side ofthat --- cloud security posture, vulnerability and supply-chain management,



incident readiness, business continuity --- will sit with you.
TRLLN is a startup-like environment backed by a general enterprise : we move fast, iterate with purpose, and care deeply about doing things right, always balancing pragmatism, speed and quality .
And we face real scale challenges: seasonal traffic peaks from massive IoT device rollouts, a growing hardware fleet in the field, demanding reliability targets, and a platform engineered to keep growing.
What we're looking for Strong analytical and problem-solving skills, with a focus on delivery and quality.
Demonstrated leadership in technical decision-making , mentoring , and team collaboration .
Excellent communication skills.
Able to explain complex systems and trade-offs clearly, both verbally and in writing.
An enabler mindset .
You make the team better.
What you bring Proven experience operating high-volume / high-traffic distributed systems in production --- event streaming (Kafka, Pub/Sub or similar), telemetry or time-series data, performance under real load, and capacity planning for traffic peaks.
Strong reliability engineering background: experience working with SLIs/SLOs and error budgets, alerting design, incident management, blameless postmortems.
Hands-on with the observability stack :



Prometheus / OpenTelemetry / Grafana or a cloud-native equivalent (we use Cloud Monitoring + Managed Prometheus) --- metrics, logging and distributed tracing, including their cost. Solid Kubernetes , Docker and Terraform (or similar IaC) experience --- networking, autoscaling, workload identity, private clusters.
We run on GCP , but experience on any major cloud transfers.
Production databases : PostgreSQL (AlloyDB / Cloud SQL or equivalent) --- performance, backups, restore and failover.
Platform security, hands-on : cloud security posture (IAM and least privilege, network segmentation, secrets management, encryption / KMS), WAF and rate limiting (Cloud Armor or similar), and remediating findings from external security assessments and pentests.
Vulnerability management and supply chain : image and dependency scanning, SBOMs, signed and attested builds, patch cadence --- plus the operational side of security incident response and business continuity / disaster recovery. Compliance as an engineer : comfortable turning regulatory and audit requirements (EU Cyber Resilience Act, ISO * / SOC 2) into controls, evidence and runbooks --- you'll help us get audit-ready.
CI/CD and GitOps : pipelines as code, progressive delivery, safe rollbacks (we use GitHub Actions).
You write production code : comfortable reading and contributing to Go and/or JVM (Kotlin / Java) services, not just YAML.
Automation and instrumentation are part of the job.
Comfortable working in both English and Spanish.
Nice to have Cloud FinOps / cost optimisation experience.
Load and chaos testing.
Exposure to IoT / device fleets or telemetry-heavy products.
Security certifications (e.G. CKS, GCP Professional Cloud Security Engineer) or prior experience on an ISO * / S

📌 Senior Site Reliability Engineer (España)
🏢 TRLLN
📍 España