Your mission

You will:

• Operate and maintain our stateful services, including PostgreSQL, ClickHouse, Redis, RabbitMQ and Kafka/Redpanda.
• Contribute to the design, evolution and scaling of our database infrastructure, with 50+ PostgreSQL clusters and increasingly complex data workloads.
• Work on projects aimed at making database maintenance, upgrades and migrations safer and less disruptive to our services.
• Improve high availability, replication, failover, backup/restore and disaster recovery across our stateful systems.
• Contribute to rebuilding our PostgreSQL clusters to support automatic failover between data centers and reduce the impact of maintenance operations.
• Help improving our queueing infrastructure, including projects such as quorum-based RabbitMQ.
• Help building and maintaining stable Redis infrastructure and improve the reliability of our stateful services.
• Investigate and solve complex performance, scalability and reliability issues across databases and distributed systems.
• Work closely with development teams to understand their needs, support their use of databases and help them build reliable solutions.
• Collaborate with SRE, networking and infrastructure teams to ensure that our stateful services operate reliably within our broader infrastructure.
• Contribute to monitoring, automation and operational practices that make our infrastructure easier and safer to operate.
• Participate in our on-call and incident management rotation, helping diagnose and resolve production issues when needed.
• Stay hands-on and close to the technology: you will be expected to understand how our systems work, how they fail and how to improve them.

Who we are looking for

Must Have

• Strong hands-on experience as a DBA, Database Engineer, SRE or similar, with solid experience in PostgreSQL.
• Experience operating and maintaining production databases, including upgrades, migrations, replication, backups, recovery, monitoring and performance troubleshooting.
• Good understanding of high availability and reliability for stateful systems: failover, redundancy, replication, disaster recovery and minimising downtime during maintenance.
• Good understanding of distributed systems, including replication, consistency, fault tolerance and the challenges of operating stateful services at scale.
• Experience working with on-premise infrastructure or a willingness and ability to quickly adapt to an on-premise/bare-metal environment.
• Good system design skills and the ability to reason about scalability, reliability and performance.
• Experience collaborating closely with software development teams, understanding their requirements and helping them build reliable solutions around databases and stateful services.
• Strong troubleshooting and problem-solving skills, with the ability to investigate complex production issues.
• Strong hands-on mindset: you enjoy getting into the technical details and solving problems yourself.
• Comfortable participating in on-call and incident management.
• Fluent English, both written and spoken. French or other languages are a plus.

Nice to Have

• ClickHouse or another complex database/data platform.
• Kafka or Redpanda and event-streaming infrastructure.
• RabbitMQ, particularly quorum-based configurations.
• Redis and distributed caching.
• Other database technologies such as Elasticsearch/OpenSearch, MySQL, Cassandra or MongoDB.
• Advanced Linux systems administration, including processes, storage, networking and troubleshooting.
• Bare-metal infrastructure and data-center environments.
• Observability and monitoring of stateful systems.
• Capacity planning, performance analysis and load testing.
• Infrastructure automation and configuration management.
• Incident management, root-cause analysis and post-mortem practices.

About You

• You take ownership. When you see a reliability or scalability problem, you investigate it and work towards a solution.
• You are genuinely technical. You like understanding how things work under the hood and are comfortable diving deep when something breaks.
• You think in systems. You understand that databases don't operate in isolation and enjoy working across infrastructure, networking, SRE and development teams.
• You care about reliability. You want systems that can be maintained, upgraded and scaled without putting the business at risk.
• You are pragmatic. You can make sensible technical trade-offs in complex environments.
• You are curious and self-driven. You learn by doing, investigate unfamiliar technologies and are comfortable figuring things out independently.
• You enjoy solving complex problems. You like working on systems where there isn't always an obvious answer.
• You communicate clearly. You can explain technical topics and work effectively with the teams relying on your services.
• You are comfortable taking responsibility. You don't need to be a manager to have an impact or take the lead on a technical problem.

Why join us

• Own critical infrastructure: your work will directly impact the reliability and scalability of Diabolocom’s platform.
• Solve complex technical challenges: work with large-scale databases and stateful services, including PostgreSQL, ClickHouse, Kafka, Redis and RabbitMQ.
• Work on real infrastructure challenges: help improve PostgreSQL clusters, cross-data-center failover, RabbitMQ and Redis reliability.
• Stay hands-on: spend your time solving challenging technical problems rather than managing people.
• Learn and grow: work across databases, distributed systems, messaging and infrastructure in a diverse technical environment.
• Work across teams: collaborate closely with Engineering, SRE and Infrastructure to build reliable systems at scale.

Recruitment Process

1. Introductory call with Talent Acquisition (1h)
2. Interview with Sergey, our CTO (1h)
3. On-site System Design interview with Sergey (1h)
   Work through a technical case study and explore your system design approach.
4. Cultural fit interview with the Team (1h)
   
   

Logistics

One More Thing