? 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 integral 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 of that — 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 global 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 27001 / 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 27001 / SOC 2 certification effort.

? What we offer

- Hybrid work model with a flexible schedule
- Based in our Barcelona HQ
- Comprehensive health insurance for your family unit
- Salary range: 55.000€ – 70.000€
- Annual training budget for continuous learning and growth

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