Senior Database Engineer

Home > Python programming jobs

Senior Database Engineer in UK

Capital on Tap
Full time
Email

UK
09/28/2026
Report

London

Responsibilities

Own query and index performance across the production SQL Server estate using execution plans, Query Store, wait statistics, and production telemetry.
Investigate and implement horizontal scaling approaches such as multi-cluster architecture, contained availability groups, and sharding.
Improve latency-critical card authorization and ledger paths against agreed p99 performance budgets.
Own high availability and disaster recovery, including availability groups, failover, backup and restore testing, and operational runbooks.
Build self-service tools for detecting query plan regressions and diagnosing query performance.
Automate database operations and manage configuration as code using PowerShell, Python, or Terraform.
Manage SQL Server cost alongside latency and uptime objectives.
Review designs with Product Engineering and data analytics teams and improve organization-wide data-access practices.
Research and promote database technologies such as graph databases and zero-downtime data migrations, including their use with Entity Framework and C#.

Requirements

Experience with ORMs, ideally Entity Framework, and understanding of their performance tradeoffs.
Substantial experience running Microsoft SQL Server at production scale, including self-managed SQL Server, Managed Instances, or Azure SQL.
Deep knowledge of query optimization, plan cache, indexing, statistics, locking, blocking, isolation levels, tempdb, and wait types.
A track record of delivering specific, measurable database performance improvements end to end.
Experience scaling relational data through partitioning, archival, denormalization, caching, read replicas, or migration to another data store.
Ability to write application code as well as scripts, with expert-level T-SQL and experience with PowerShell or Python and infrastructure as code.
Hands-on experience designing high availability and disaster recovery systems and leading production incidents.
Working knowledge of other database engines such as PostgreSQL and their relative advantages and disadvantages.
Ability to explain technical concepts and tradeoffs to non-database specialists.

Benefits

Hybrid working arrangement with the AI team working from the Moorgate, London office two days per week.
Private healthcare including dental and optician services through Vitality.
Worldwide travel insurance through Vitality.
Anniversary rewards of £250, £500, £750, and a four-week fully paid sabbatical.
Salary sacrifice pension scheme with up to 7% matching.
Octopus EV salary sacrifice scheme.
28 days of holiday plus bank holidays.
Annual learning and wellbeing budget.
Enhanced parental leave.
Cycle to Work Scheme.
Season Ticket Loan.
Six free therapy sessions per year.
Dog-friendly offices with free drinks and snacks, a pool table, arcade machine, and beer tap.

Capital on Tap

Capital on Tap provides an all-in-one business credit card and expense management platform for small businesses, offering funding, employee card controls, and cashback rewards. It earns revenue through card usage and lending, and serves companies in the UK and US via a self-serve online applicati...

Similar positions

Graduate Software Engineer

Synack
Full time

UK
10/04/2026

Remote

Software Engineer - Cloud Images

Canonical
Full time

Remote
10/04/2026

EMEA, Americas

GTM Engineer

Higgsfield
Full time

USA
10/04/2026
Salary: $130k - $175k/yr

San Francisco, CA

Research Engineer

Clera
Full time

Others
10/04/2026

Zürich, Switzerland

Lead Automation Quality Engineer

London Stock Exchange Group
Full time

Others
10/04/2026
Salary: Competitive

Bengaluru, India