Lead SRE Engineer

TL;DR

Lead SRE Engineer: Driving resilience and reliability improvements across infrastructure with an accent on monitoring, alerting, and observability practices. Focus on Kubernetes cluster health, scalability, and predictable deployments, as well as incident response and collaboration with DevOps partners.

Location: Join from anywhere or work onsite in our Belgrade or London offices.

Company

FunnelFox is the leading platform for mobile apps revenue growth, helping top mobile apps build, launch and optimize high-converting web-to-app funnels.

What you will do

• Drive resilience and reliability improvements across our infrastructure.
• Design and implement monitoring, alerting, and observability practices (SLIs/SLOs, dashboards, alert hygiene).
• Lead incident response culture: reduce MTTR, create playbooks, and ensure we learn from every incident.
• Collaborate with our external DevOps team — guiding priorities, reviewing proposals, and ensuring consistency.
• Keep our Kubernetes clusters (running on our hardware) healthy, scalable, and predictable.
• Partner with product engineers to make deployments smooth and safe.

Requirements

• You have solid experience running Kubernetes in production.
• You have strong knowledge of observability stacks (Prometheus, Grafana, Loki, etc.)
• You have a proven track record in incident management: designing processes, running postmortems, and preventing recurrence.
• You are familiar with Helm, GitHub Actions, and containerized workflows.
• You have experience working in an SRE culture: SLOs, error budgets, and balancing reliability with delivery speed.
• You have strong communication skills and can confidently lead conversations with both engineers and external partners.

Nice to have

• Exposure to Cloudflare Workers/R2 or other edge compute/storage.
• Experience with Go services, Postgres, and ClickHouse.
• Background in cost optimization and capacity planning.
• Previous work in a startup or high-growth environment.
• Interest in building a team in the future.

Culture & Benefits

• Strong product: FunnelFox is among the top 5% fastest-growing SaaS companies.
• Career growth: Real opportunity to grow into senior roles in strategy or team leadership as we scale.
• Direct communication and ownership: No bureaucracy, no politics, just impact.
• Flexible remote work.
• Additional benefits include education and sports reimbursements, laptop coverage, PTO, and more.