Senior Site Reliability Engineer, Platform & Reliability (MFX)

Location: France

Reports to: Eric Schmidt

Most go-to-market teams are still running playbooks built for a different era. More cold outreach. More ads. More noise. Crossbeam was built on a different idea: the fastest path to revenue is often through the companies already connected to your customers.

Crossbeam is the platform that makes that possible. Companies use Crossbeam to securely compare CRM data with partners revealing shared customers overlapping prospects and warm paths into deals. Were defining the category of ecosystem-led growth and giving revenue teams a fundamentally better signal for how to prioritize accounts collaborate with partners and win deals faster.

This is a senior individual contributor role with broad technical ownership and significant influence across Engineering. Your mission will be to help design and evolve a platform that is reliable scalable secure and efficient while raising the bar for SRE and cloud-native practices across the organisation.

We are looking for someone who wants to remain deeply hands-on: someone who can design architecture challenge technical decisions automate at scale investigate complex production issues and help other engineers make better technical decisions.

You dont need to become a manager to have significant impact here.

• Architect build and evolve highly available scalable and secure infrastructure.

• Take ownership of major Platform and Reliability initiatives from technical assessment and architecture through to production.

• Provide technical leadership and mentorship across the Engineering organisation.

• Manage and continuously improve our core infrastructure around AWS Kubernetes Docker and Terraform.

• Work with Helm FluxCD and Kustomize to improve deployment and infrastructure management.

• Partner closely with development teams to build and improve highly automated CI/CD pipelines particularly with GitHub Actions.

• Strengthen observability and proactively identify reliability performance and capacity issues.

• Troubleshoot complex production problems and participate in the on-call rotation incident response and post-mortem analysis.

• Design and improve our infrastructure security practices and tooling.

• Work across a rich data and database ecosystem including PostgreSQL StarRocks OpenSearch Redis and MongoDB.

• Interact with cloud and distributed systems including Confluent Snowflake and Temporal.

• Drive automation architectural reviews and continuous improvements across the platform.

• Build useful technical documentation including runbooks playbooks and architecture documentation.

We expect you to bring roughly 8 to 10 years of experience in Site Reliability Engineering Platform Engineering DevOps or Infrastructure Engineering. More importantly we are looking for technical depth and demonstrated ownership rather than a specific number of years.

• Deep experience running Kubernetes and Docker in production at scale.

• Strong expertise with AWS and complex cloud architectures.

• Advanced Infrastructure as Code experience particularly with Terraform.

• Strong understanding of reliability scalability observability and production engineering.

• Experience designing and operating modern CI/CD environments ideally with GitHub Actions.

• Solid experience with production databases particularly PostgreSQL and/or MongoDB.

• A strong understanding of modern infrastructure security practices.

• The ability to investigate complex problems across application infrastructure and data layers.

• Experience owning significant infrastructure projects or migrations from design through production with measurable outcomes.

• Strong communication skills and the ability to influence technical decisions across Engineering.

• Experience mentoring engineers and leading technical initiatives without relying on formal management authority.

• Professional working English and experience working in distributed or international environments.

This is not a role where infrastructure exists separately from software. You should be comfortable reading debugging and writing code when needed. Experience with languages such as Go Python Clojure or JavaScript is particularly relevant.

We dont expect expertise in every language or technology in our stack. We care much more about your ability to understand unfamiliar systems go deep when necessary and learn quickly.

Experience with some of the following would be valuable but we dont expect you to tick every box:

Helm FluxCD Kustomize StarRocks OpenSearch Redis Confluent Snowflake Temporal CrowdStrike Tenable One

We are a distributed Engineering organisation where autonomy concise communication and technical excellence matter.

Our engineers are expected to understand the problems they own challenge assumptions and make decisions rather than simply execute tickets.

We value people who can combine technical depth with pragmatism: engineers who know when to go deep when to simplify and when the best engineering decision is not to add more technology.

This role offers significant technical scope and autonomy. It is particularly suited to an experienced engineer who wants to increase their technical impact without moving away from engineering into people management.

• Take ownership without waiting for permission

• Know when to go deep when to simplify and when not to add more technology

• Challenge assumptions with evidence and help others make better decisions

• Use AI as leverage to improve your work not just describe that youre open to it

• Make the people around you more effective by being clear reliable and easy to work with

• Competitive compensation and stock options

• Health insurance with Alan

• Swile meal vouchers (10 EUR per working day 50% covered by Crossbeam)

• Remote work support: 50 EUR monthly allowance 200 EUR home office budget and up to 50 EUR per week for a coworking space if you live outside Ile-de-France

• Annual wellness stipend of 1000 EUR

• Collaborative teammates and a culture built on trust and accountability