Senior SRE / DevOps Engineer H/F

[SKALEET]

Skaleet builds the core banking engine behind banks and neobanks: accounts, payments, cards. Our platform runs in production for 30+ regulated financial institutions in 15 countries, including Crédit Agricole, Caisse d'Epargne and Nirio (FDJ United), and manages over 10 million accounts.

In 2026, Euromoney named Skaleet the best banking solution in Europe. Our revenue grew by 40% in 2025. We are about 100 people, based in Boulogne-Billancourt.

Our infrastructure is critical: every client runs on its own dedicated platform, which means 50+ production environments to operate, each with its own specificities.

[Job Description]

💡 Context

Our strategic infrastructure project: migrating our VMware/vSphere estate (~450 VMs across 5 datacenters) to Kubernetes, without interrupting the banking services that run on it.

You will join the Infrastructure team, within the Platform department, as a senior SRE and technical referent, and play a leading role in this migration.

Beyond the migration, you will own the most complex infrastructure topics across all client platforms: high-availability architectures, operations as code, and reliability practices (SLOs, observability, incident management, post-mortems) shared with the team and the development squads. You will arbitrate architecture decisions on your scope, mentor junior and mid-level engineers, and reduce recurring operational load through automation rather than manual work.

👉 Your future missions

VMware → Kubernetes migration & high availability

• Drive the migration from VMware/vSphere (~450 VMs, 5 datacenters) to Kubernetes (3 clusters, ~20 nodes).

• Design and implement high-availability architectures and infrastructure extension projects.

Infrastructure as Code

• Industrialize operations with Terraform and Ansible: provisioning, deployments, system updates, platform provisioning.

• Eliminate recurring manual operations across the board.

Reliability & service levels

• Guarantee availability, capacity and performance of client platforms; own SLA/SLO commitments.

• Define SLOs with the development teams and arbitrate reliability vs. delivery speed on that basis.

• Work as a partner of the development squads, not as a ticket desk: co-build the path to production and help developers become autonomous in running their services.

Observability & incident management

• Improve metrics, logs, traces, dashboards and actionable alerting, with measurable noise reduction.

• Act as Incident Commander on major incidents; drive resolution, lead blameless post-mortems and remediation plans.

Level 3 support

• Serve as the final escalation point for infrastructure issues raised by support, development and project teams.

• Surface recurring root causes upstream instead of firefighting case by case.

Security, compliance & leadership

• Integrate banking-sector security and compliance requirements into infrastructure choices, with the CISO.

• Document architectures and runbooks; mentor junior and mid-level engineers; lead technical reviews.

• Contribute to technical hiring for the team.

⚠️ On-call required. Scheduled interventions outside business hours for client-impacting operations (migrations, cutovers, maintenance).

🛠️ Tech stack

• Infrastructure (on-premise): OVH · VMware/vSphere (~450 VMs, 5 DCs) · Kubernetes with Helm (3 clusters, ~20 nodes)

• Automation: Terraform · Ansible · Rundeck · GitLab CI

• System: Debian · Apache · PHP 8.x · MySQL/MariaDB · PostgreSQL · NodeJS

• Observability: ELK stack (Elasticsearch, Kibana) · status page · alerting

• High availability: RabbitMQ · Vault · ProxySQL · Redis · load balancing & failover

• Network: IPsec (libreswan) · OpenVPN · nftables · Debian routers & VLAN · OVH vRack

• Backup: Veeam

[Desired Profile]

✨ You are a great match if:

• Master's degree from a top-tier engineering school, or equivalent experience.

• 6+ years of experience as SRE, DevOps Engineer or in production infrastructure.

• Strong command of Linux/Debian environments, with significant Docker and Kubernetes production experience.

• Hands-on experience with on-premise infrastructure (not only managed public cloud).

• Proven infra-as-code practice with Terraform and/or Ansible, demonstrated on real projects.

• On-call and production incident management experience.

• Solid Python or Bash skills.

• Fluent French (the team works in French).

Nice to have

• Strong network knowledge (routing, firewalling, VPN).

• VMware vSphere experience and Kubernetes migration experience.

• Experience in a regulated or high-availability-critical sector (banking, payments, healthcare).

• Experience working with distributed teams.

• Professional English.

The profile that works here

• Pragmatic: you take ownership of production and prefer eliminating a recurring problem over working around it.

• Cool-headed in a crisis: you lead major incidents and decide under pressure with incomplete information.

• A clear communicator: you make reliability topics understandable to product and project stakeholders.

• A mentor: you grow the team's skills rather than keeping knowledge to yourself.

• Methodical: you document and get sensitive operations reviewed, you always plan a rollback, and you honor your on-call commitments.

• Driven by continuous improvement: operational load is a problem to solve, not a fatality.

🎉 The benefits of joining Skaleet

• Hybrid work: up to 2 days of remote work per week

• 25 days of paid vacation and 12 additional days off (RTT) per year

• Health insurance: Alan Blue

• A Swile card to cover your meals on workdays

• Brand-new offices in Boulogne-Billancourt, right next to Metro Line 10

[Recruitment Process]

1. A video call with Maxime, HR Manager (30 min).

2. A technical interview with Jonathan, Lead Infra, and a DevOps engineer from the team, to dive into the role and your experience (60 min).

3. An interview with Thomas, VP Platform.

4. A final meeting at our office with Victor, our Chief of Staff.

We look forward to discovering your profile!