Senior Site Reliability Engineer (Database Focus)

About us GoCardless, a Mollie company, is a global leader in bank payments. Over 100,000 businesses, from start-ups to household names, use GoCardless to collect, manage and send bank payments through Direct Debit, real-time payments and open banking. With US$130bn+ processed annually across 30+ countries, we handle recurring and one-off payments without the chasing, stress, or expensive fees. Our end-to-end payment platform also features AI-powered solutions to improve payment success and reduce fraud, alongside connections to over 350 platforms businesses use everyday. We are headquartered in the UK, with teams and operations spanning North America, Europe and Asia-Pacific. For more information, please visit www.gocardless.com and follow us on LinkedIn @GoCardless. Mollie is the leading payments and financial services partner for business, rooted in Europe, with global reach. Platform Engineering at GoCardless The Platform Engineering team is a unified, globally distributed team, currently located in London, Riga and Lisbon. We work with all other engineering teams to empower them to build, release, run and scale their products, with a strong focus on both strategic project delivery and operational excellence. Our work is a balance of: Project delivery: building new platform components, from initial design to deployment. Operational support: keeping our systems healthy and stable through on-call rotations and incident management. Business as usual: continuous maintenance, improvements, and support for audits and compliance. The role We’re looking for a Senior SRE with deep PostgreSQL expertise to own the reliability, performance and scalability of our database estate. Our databases sit at the heart of a payments platform, so slowdowns and outages directly affect our customers. You’ll work across our self-managed Stolon clusters and our GCP Cloud SQL fleet. Joining Mollie gives us the opportunity to consolidate, modularise and rethink how we run production databases, and you’ll help us do that while keeping everything reliable. Tech stack and tools PostgreSQL, Stolon, Cloud SQL, PgBouncer Python, Ruby, Golang Terraform, Atlantis GCP Kubernetes, GKE GitHub, ArgoCD Grafana, Prometheus, Datadog We use a wide range of technologies and will never expect you to have experience with all of them. What excites us Skills Typically 5+ years of production experience running PostgreSQL, including high availability, replication, and backup and recovery Deep knowledge of Postgres performance and tuning: internals (memory settings, autovacuum, locking) and connection pooling, including managing it in production and supporting it on call Experience running production databases in the cloud, whether on managed services or self-managed on cloud infrastructure Strong query analysis skills (EXPLAIN plans, indexing strategy) Experience running major-version upgrades safely with minimal downtime Experience managing infrastructure as code with Terraform or similar IaC tooling Experience with monitoring and alerting (Prometheus, Grafana, Datadog or similar) Experience writing code/working in software engineering teams Experience with on-call and incident response Ability to influence application teams Nice to have Experience with Stolon , or similar Postgres HA tooling Experience with managed cloud Postgres (GCP CloudSQL, AWS RDS etc.) Experience with Kubernetes, GKE and ArgoCD Experience migrating databases between platforms Experience with SLOs and error budgets Experience in payments or financial services Why it matters We hope you’re enthusiastic about the infrastructure space and the impact your work can have on others. In this role: You’ll work on a core system with direct, measurable impact on the reliability of the payments. You’ll solve hard performance and reliability problems in systems that matter. You’ll shape our database a