Senior Site Reliability Engineer (SRE / Backend)

We're looking for a Senior Site Reliability Engineer to take ownership of the infrastructure behind our platform. We run web applications and two mobile apps entirely on AWS, built around serverless and event-driven services and managed with Terraform., * Own our AWS infrastructure end to end - Lambda, ECS Fargate, SQS, SNS, EventBridge, SES, Cognito, DynamoDB, RDS Postgres, and DMS

• Manage everything as code in Terraform, with well-designed modules, clean state management, and a solid review workflow
• Build and maintain CI/CD pipelines with safe rollout and rollback across web, mobile backends, and infrastructure
• Design our event-driven services for resilience: retries, dead-letter queues, idempotency, graceful degradation
• Own our Datadog and Sentry setup - define SLOs, build dashboards, and keep alerting actionable instead of noisy
• Lead incident response and run blameless postmortems that actually change how we build
• Harden our security posture: IAM, secrets management, network boundaries, Cognito auth flows, and vulnerability remediation
• Protect sensitive health data and support our GDPR and compliance requirements
• Monitor and optimize AWS spend without compromising reliability
• Contribute to backend development - APIs, event consumers, data pipelines, and Postgres and DynamoDB performance
• Participate in architectural discussions and mentor engineers on operational excellence, * Real ownership: a small team, short feedback loops, and no layers of approval between you and production
• Work that matters: the reliability you build directly affects people reaching for mental health support
• Free access to the nilo app (incl. family support)
• A dedicated learning budget for your personal and professional development
• Work abroad for up to 90 days per year (within the EU)
• Hybrid working model: 2 days/week from the office, 3 days from home
• Urban Sports Club membership at a discounted price
• Equity options: you benefit from any increase in nilo's valuation that you've helped to create
• Regular team and company events
• Bring your dog to work: we have 4 office dogs

Must-have

• 5+ years in SRE, DevOps, platform, or backend engineering, with real production ownership
• Deep AWS experience across serverless and containers - Lambda, ECS Fargate, and debugging both under pressure
• Strong Terraform skills, including module design and managing state across multiple environments
• Hands-on experience with event-driven architecture (SQS, SNS, EventBridge) and a healthy respect for its failure modes
• Solid PostgreSQL: query tuning, indexing, connection management, and zero-downtime migrations
• Production experience with Datadog or a comparable observability platform (Grafana, New Relic, Honeycomb)
• Comfortable writing production backend code in [Python / Node.js / Go]
• Genuine on-call and incident response experience - you've led an incident and written the postmortem
• Strong security fundamentals: IAM, least privilege, secrets, network isolation, common web vulnerabilities
• Pragmatic about complexity - you reach for the simplest thing that meets the reliability bar
• Effective communicator who can explain a technical tradeoff without jargon

Nice-to-have

• AWS DMS or other data migration and replication tooling
• Compliance experience (GDPR, SOC 2, ISO 27001)
• Experience in a B2B SaaS environment or healthcare-related product