Senior Platform Engineer

📋 Job Overview

Sparteo is an independent suite of AI-powered advertising technologies built on sustainable, sovereign infrastructure. Since 2018, we’ve been reshaping programmatic advertising to make it faster, more transparent, and more profitable by building the most direct path between publishers and advertisers. Our data-driven tech delivers 30% higher revenues for our clients on average than traditional solutions.

🏢 About Sparteo

Our Solutions:

→ Actirise: the display tech designed for performance
→ FastCMP: the consent management platform specifically designed for business purposes
→ Meetscale: the most advanced SSP for Publishers and Ad Networks
→ Viously: the ultimate all-in-one video tech solution

Behind Sparteo’s growth is a team of 100+ talents across 11 countries, united by a shared ambition to redefine the future of digital advertising. Our dedication has placed Sparteo among the most dynamic tech players in Europe:

• FT1000 ranking: Among the fastest-growing European companies in 2024 & 2025
• The Europas: Featured in the list of 100 hottest startups
• Pixalate Ranking: #1 Web SSP in France with our Actirise solution, overtaking Google AdExchange

🎯 The Role

The Infrastructure & Cloud Services team runs the platform behind all Sparteo products: 100% bare metal in our own datacenters, Kubernetes at scale, and a self-managed network (BGP, our own AS, transit and peering). We don’t rent our infrastructure, we own it, and this sovereign, cost-efficient setup is a core part of what makes Sparteo fast and profitable.

As our Senior Platform Engineer, your mission is to design, operate and scale the foundations every Sparteo product relies on. You will take ownership of critical parts of the stack, lead architecture decisions and help the team grow.

✅ Key Responsibilities

• Platform Design: Design, implement and operate our Kubernetes platform: networking, ingress, GitOps and configuration management.
• Automation: Own CI/CD pipelines and packaging, with an automation-first approach from provisioning to deployment.
• Observability: Operate our observability stack, with large-scale metrics and log management.
• Operational Excellence: Own runbooks and the alerting catalog to keep our platform reliable and our on-call actionable.
• Data Platforms: Operate our data infrastructure: distributed storage, high-performance analytical and relational databases, and in-memory datastores.
• Scaling: Scale our physical infrastructure: server procurement, rack upgrades and network capacity.
• Cost Efficiency: Contribute to cost optimization across the whole platform.
• International Expansion: Take part in the expansion of our infrastructure in the US.
• Architecture: Lead architecture decisions on the platform.
• Mentorship: Mentor junior team members and share best practices across the team.

📌 Required Qualifications

• Experience: 5+ years in infrastructure / DevOps, with solid production Kubernetes experience, ideally on bare metal.
• Infrastructure as Code: An automation-first mindset: provisioning, configuration management, GitOps.
• Networking: Strong networking fundamentals: BGP, L2/L3, load balancing.
• Communication: Strong communication with product teams and stakeholders.
• Languages: Fluent in English (written and spoken); French is a plus.
• AI-native reflex: You are open to AI-assisted tooling in your daily workflows and use it to automate, document and move faster.

⭐ Desirable Experience

• Data Infrastructure: Experience with distributed storage or large-scale databases.
• Low-level Debugging: Instincts for troubleshooting at kernel, network and hardware level.

🎁 Benefits

• Dynamic Remote Culture: At Sparteo, we embrace a flexible work environment that adapts to your lifestyle, allowing you to contribute from wherever you feel most productive, be it from home or our urban offices in Paris, Lille, or London.
• Close-knit Team: Be part of our dynamic and united team, where collaboration, innovation, and mutual support drive our collective success and create a thriving work environment.
• Vibrant Social Events: Engage in regular social gatherings and company events that foster community and celebrate our milestones.
• Rapid Growth: Experience the excitement of working with a company in rapid expansion mode, impacting the advertising technology landscape across Europe and beyond.
• Tailored Support: We provide robust career development support, including training programs, career check-ins with HR, opportunities for internal mobility, and performance feedback sessions conducted quarterly or semi-annually, depending on your role.
• RTT Days: We support work-life balance with additional rest days (RTT), provided based on position and tenure, empowering you to recharge and enjoy life outside of work.
• Comprehensive Health and pension plans: We provide a robust health benefits plan, ensuring you and your family are covered and cared for.

🛂 Visa & Eligibility

We are committed to providing equal opportunities and fostering an inclusive work environment. We encourage applications from all backgrounds, identities, and experiences.