Position: C# Developer Location: Belfast / 3 days a week on site Duration: 6 Months Start date: Asap We're seeking skilled C# Developers with strong SQL and AWS expertise to join our Data Modernization team in Belfast. You'll help design and deliver scalable backend services and data pipelines to power our AWS-based data lake, enabling critical datasets such as reference data, counterparty data, and instrument data. What You'll Do Design, develop, and maintain backend services and APIs using C#, SQL, and AWS-native technologies. Build and enhance ETL pipelines to ingest and transform data from multiple sources into our AWS data lake. Work with AWS services such as Lambda, Glue, S3, and RDS to deliver secure, scalable solutions. Partner with business analysts to implement workflows aligned with financial services requirements. What You Bring Proven C# development experience, including API design and implementation. Strong skills in writing and optimizing SQL queries for large and complex datasets. Hands-on AWS experience ( S3, Glue, Lambda, RDS or DynamoDB ). Solid understanding of data modeling and ETL concepts. (Bonus) Experience in financial services or with reference, counterparty, or instrument data. Please get in touch with me if you're interested if not can you refer?