Senior Database Developer

Senior Database Developer – Financial Services

Location: London – Hybrid
Type: Permanent
Sector: Financial Services / FinTech

An established and growing financial technology business is looking for a Senior Database Developer to join its London technology team and take significant ownership of the design, performance and evolution of its core data platform.

This is a hands‑on senior position for someone who has developed deep SQL Server expertise and progressed into making architectural decisions around data modelling, schema design and platform structure.

Rather than simply implementing predefined specifications, you will have genuine influence over how the organisation's data platform is designed and evolves, working across both established production systems and new projects.

The Role

You will take ownership across database development and data architecture, working closely with engineering, product and operational stakeholders across an international technology function.

Key responsibilities will include:

• Designing, developing and enhancing enterprise‑scale SQL Server solutions

• Taking ownership of schema design, data modelling and data architecture

• Optimising complex queries, execution plans, indexes and overall database performance

• Diagnosing production database issues and conducting root‑cause analysis

• Developing and maintaining data pipelines using dbt

• Supporting existing SSIS/SSRS solutions

• Managing database releases, including schema migrations, deployment scripts, versioning and rollback strategies

• Applying data warehousing principles across operational and analytical workloads

• Helping shape the future data platform as modern technologies such as Databricks and Snowflake are introduced

• Working closely with backend and frontend engineers to deliver end‑to‑end solutions

• Documenting architecture, data flows and key design decisions

What We're Looking For

The successful candidate will ideally have:

• 8+ years' SQL Server experience

• Expert-level T‑SQL

• Strong database performance tuning and index optimisation experience

• Excellent understanding of schema design and relational data modelling

• Proven ability to make and defend data architecture decisions

• Experience with SQL Server In‑Memory OLTP

• Hands‑on experience with database monitoring and performance tooling such as Redgate SQL Monitor, SQL Sentry or equivalent

• Strong understanding of database release and deployment processes

• Experience with SQL Server Data Tools (SSDT)

• Hands‑on dbt experience

• Experience with Power BI, including operational/paginated reporting

• Strong knowledge of data warehousing methodologies, including Kimball and Inmon

• Experience with Git, Jira and Agile development environments

Desirable Experience

Exposure to any of the following would be beneficial:

• Databricks or Snowflake

• AWS or other cloud environments

• Airflow or AWS Glue

• SSIS / SSRS

• Financial markets or financial data

• FinTech, SaaS, credit or data analytics environments

• Wider development technologies such as Python or C#

Why Join?

This is an opportunity to move beyond pure database development into a position with genuine architectural influence and ownership.

You'll join an international technology environment, work closely with senior stakeholders and have the opportunity to influence how a business‑critical data platform develops as the organisation expands its use of modern data technologies.

The business offers a hybrid working model, private healthcare, pension, competitive holiday allowance and ongoing professional development opportunities.