Back End Developer - Python

Insight Global is looking for a Senior Developer to join the Integration team within an global financial services organisation, enabling faster and more consistent onboarding of new applications and data feeds into business-as-usual platforms. The team builds reusable services, APIs and supporting infrastructure (leveraging AWS native services where appropriate) in a Kanban delivery model. The core stack is SQL Server (~30%), C#.NET (~30%), Terraform (~20%), Angular (~10%) and Python (~10%).
Please note, this is a PAYE contract starting at 12 months with strong possibility for extensions and/or conversion to FTE. This role requires you to be on-site 3 days a week in the office based out of London.
Day-to-Day Responsibilities:
Build and evolve reusable integration services and APIs for data-feed and application onboarding
Support Database Migration Services to replicate data from one platform, to another
Automating ingestion of monthly files produced by one platform to another
Define communication contracts and processes
Apply strong data modelling and automated testing across integrations
Work within architectural governance for cross-account AWS integration
Take assigned stories end-to-end through to production via BAU release, defect and change processes
Must-Haves:
Strong commercial software development
Strong SQL Server (T-SQL, stored procedures)
Solid C#.NET development
Terraform / infrastructure-as-code
Python and lightweight Angular where beneficial
Experience building reusable services and APIs for onboarding data feeds/applications
Comfortable across multiple integrations in a monolithic, database-heavy system
Plusses:
AWS native services — Lambda, DMS, EC2, SQS, SNS
Ansible / wider IaC tooling
Financial Markets (Equity) / Index Services domain knowledge
Agentic AI tooling (e.g. GitHub Copilot)
Cross-account AWS integration pattern experience