Support a large-scale data integration initiative while developing robust backend applications and APIs using C#, ensuring high performance and scalability.
📍 Locations: Chicago, IL & Denver, CO
🏢 Work Model: 5 Days Onsite
🗓 Interview: In-Person Required
📄 Employment Type: W2 Only (Minimum 12 Months Visa Validity Required)
👥 Local Candidates Only
Hourly rate - $60 - $70
We are seeking a highly experienced Senior .NET Backend Developer to support a large-scale data integration initiative. This role is heavily focused on backend C# development, working within an existing codebase, and building robust integrations that process and distribute data across enterprise systems.
The ideal candidate has strong experience in API development, messaging systems such as Kafka, and SQL Server, with a solid background in processing and transforming data streams.
Develop and enhance backend applications using C# and .NET
Work within and extend existing codebases
Build and maintain APIs for data integration
Consume and process messages from Kafka topics (or similar messaging platforms)
Process outputs from application/source code scanning tools
Transform and route data to downstream systems
Ensure high performance, scalability, and reliability of integrations
Write optimized SQL queries and manage SQL Server databases
Collaborate with cross-functional teams to deliver integration solutions
7+ years of professional experience in .NET development
Strong backend development expertise in C#
Extensive experience with data integration projects
Hands-on experience with Kafka or similar messaging tools
Experience processing and transforming data streams
Strong SQL Server knowledge (queries, performance tuning, stored procedures)
Experience developing APIs
Ability to work onsite 5 days per week
Experience with WPF
Experience with WinForms
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🚫 Third-party recruiters, please do not reach out for this role.
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