Database Administrator, Infrastructure - UK

Applicants must be authorized to work for any employer in the country in which the role is being hired. We are unable to sponsor or take over sponsorship of an employment visa at this time. Mark43’s mission is to empower communities and their governments with new technologies that improve the safety and quality of life for all. We build powerful, scalable, and elegant software that sets a new standard for the tools upon which first responders rely. Our users are diverse, and we are committed to embracing diversity of thought, experience, and background within our team. About This Role We are seeking a UK-based Senior / Staff Database Administrator to help lead the design, reliability, security, and operational maturity of Mark43’s production database infrastructure for UK public safety customers. In this role, you will serve as a senior technical owner for database reliability and performance. You will partner with engineering, infrastructure, security, delivery, and customer teams to ensure that Mark43’s database systems are stable, scalable, secure, observable, and ready to support mission-critical public safety workloads. In this role, it is expected to independently own complex database initiatives and mentor others, provide technical direction, influence cross-team architecture, lead high-impact reliability programs, and serve as a trusted authority across the organization. Because this role may involve work with UK police customers, candidates must be eligible to obtain and maintain the required UK police and/or government security vetting, including NPPV3 and, where applicable, SC clearance. What You'll Do In this role, you will: Own and improve the reliability, performance, security, and scalability of production database systems. Lead database monitoring, alerting, capacity planning, backup, recovery, replication, and disaster recovery practices. Identify, diagnose, and resolve complex database performance and availability issues. Partner with engineering teams on schema design, indexing strategies, query optimization, and safe database change management. Lead technical planning for database migrations, upgrades, scaling strategies, and operational improvements. Improve infrastructure-as-code, automation, observability, and repeatability across database operations. Define and maintain database runbooks, operational standards, and production readiness criteria. Participate in and, when appropriate, lead database-related incident response, post-incident reviews, and remediation planning. Collaborate with security, compliance, and delivery teams to meet customer, regulatory, and vetting requirements. Provide technical guidance and mentorship to engineers, DBAs, and operational teams. Represent database reliability concerns in architecture reviews, roadmap planning, and customer-readiness discussions. Help build the operational foundation required to support UK police customers and future UK public safety partners. What You’ll Need We are looking for someone with: Significant professional experience administering MySQL or similar relational databases in production environments. Deep experience operating cloud-hosted database platforms, preferably AWS RDS, Aurora, or Azure database services. Strong expertise in database performance tuning, query optimization, replication, backup, recovery, and high availability. Experience designing and operating database infrastructure for complex cloud-based software applications. Experience with infrastructure as code, automation, observability, and production operations. Strong understanding of cloud infrastructure, networking, security, access controls, and operational risk. Ability to influence engineering teams and guide database design decisions across services. Strong incident management skills and sound judgment during high-pressure production events. Clear written and verbal communication skills, including the ability to explain complex technical tradeoffs to technical and non-t