Capital on Tap - Senior Database Engineer
Requirements
• Experience working with ORMs (ideally Entity Framework) and the particular performance tradeoffs that come with an ORM. • Substantial experience running Microsoft SQL Server in production at scale, whether that be self managed, Managed Instances, or on Azure SQL, in a business where downtime and latency have direct commercial impact. • Real depth in the internals. The query optimiser and plan cache, indexing and statistics, locking, blocking and isolation levels, tempdb, and the wait types that tell you which of those is actually hurting you. • A track record of specific, measurable performance wins you can walk us through end to end. • Experience scaling relational data past the point where tuning alone works. Partitioning, archival, denormalisation, caching, read replicas, or a considered move to a different store. • Comfortable writing application code, not just scripts. T-SQL to an expert level, plus PowerShell or Python, and infrastructure as code. • Hands-on with HA/DR design and with leading production incidents. • Working knowledge of other database engines such as PostgreSQL, and views on the relative pros/cons. • An ability to translate technical concepts and tradeoffs to non-database specialists. • Diversity & Inclusion 🌈We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work. • Diversity & Inclusion 🌈
Responsibilities
• Own query and index performance across our transactional SQL Server estate, using execution plans, Query Store, wait statistics, real production telemetry or other data driven measures. • Investigate and implement horizontal scaling techniques such as multi-cluster architecture, contained availability groups, sharding, etc, to ensure Capital on Tap’s distributed software estate can continue to support a fast growing customer base and increasing service count. • Find and remove the bottlenecks on our latency critical paths, starting with card authorisation and ledger read/writes, and hold them to an agreed p99 budget. • Own high availability and disaster recovery. Availability groups, failover, backup and restore testing against real RTO and RPO targets, and the runbooks that go with them. • Build and enhance self serve tooling to enable development teams to identify query plan regressions along with self service diagnostic tools to allow teams to debug their own query performance. • Automate what is currently manual, using PowerShell, Python, or Terraform, and treat database configuration as code. • Manage SQL Server cost as a first-class metric alongside latency and uptime. • Work alongside Product Engineering and our data analytics team, reviewing designs before they ship and levelling up how the whole engineering org thinks about data access. • Evangelise advanced database technologies to the software engineering teams. Research, demo and promote technologies such as graph databases and zero-downtime data migrations, and how they can be used in EF via C#.
Benefits
• Check out more of our benefits, values and mission here. • Other Info👍Check out our ‘Top Tips’ for interviewing.✔️Keep updated on new job opportunities by following us on Linkedin.📧Email [email protected] if you have any questions. • Other Info • Excited to work here? Apply!If you’d like to progress your career within our fast growing, profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.) • Excited to work here? Apply!
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