Senior Database Platform Engineer

Responsibilities

• ▹Own the administration and reliability of Proton's web-scale MySQL fleet via ProxySQL, including 24/7 on-call rotation
• ▹Design and implement automation that eliminates manual operational toil
• ▹Write code and tooling to manage, monitor, and scale the database platform
• ▹Own performance tuning across the full stack: hardware, OS, storage, network, and query level
• ▹Drive database best practices into product design reviews
• ▹Lead the planning and execution of database version upgrades and full stack updates with minimal disruption
• ▹Shape Proton's long-term database strategy, evaluating emerging distributed database technologies

Requirements

• ▹5+ years of hands-on experience operating highly available MySQL databases at scale in production
• ▹Deep MySQL expertise: replication, query optimization, indexing, schema design, and performance tuning
• ▹Solid experience with ProxySQL and Linux in production environments
• ▹Strong automation background, meaningfully reducing operational toil through scripting or custom tooling (Python, Go, Bash, or equivalent)
• ▹Comfortable with observability stacks (Prometheus, Grafana or comparable), using data to diagnose issues
• ▹Experience running databases on bare-metal or on-premise infrastructure (not cloud-managed DB services)

Nice to have

• ▹Hands-on experience with distributed databases such as CockroachDB or YugabyteDB
• ▹Experience with Puppet or comparable configuration management systems
• ▹Prior exposure to high-traffic, multi-tenant ProxySQL deployments

Soft skills

About the company

Proton was founded in 2014 by CERN scientists on the belief that privacy is a fundamental human right. They built the world's largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar. The company is profitable, independent (no VC control), with 700+ team members across 50+ countries.