Senior .NET Integration Developer - REMOTE (Canada)

Design and implement integration solutions using .NET (C#), WCF, and RESTful APIs to connect internal systems, third-party services, and legacy applications. Develop, test, and maintain backend components (Windows services, console apps, web APIs) using ASP.NET, Entity Framework, ADO.NET, and LINQ. Create and maintain data transformation logic using XML/XSLT, JSON mappings, and custom transformation code for data exchange between systems. Build client-facing and administrative web functionality using HTML, CSS, and client-side scripting (JavaScript/jQuery, Angular) where applicable. Design and optimize database schemas and queries; write stored procedures, views, and performance-tuned SQL for SQL Server and/or Oracle. Implement logging, error handling, retry and idempotency strategies for reliable integrations; diagnose and remediate integration failures. Collaborate with product owners, architects, QA, and operations to gather requirements, define interfaces (Swagger/OpenAPI), and produce integration specifications. Participate in DevOps and CI/CD activities: create build/release pipelines, automate deployments to IIS (and other hosting environments), and work with source control (Git). Ensure security and compliance of integration endpoints (authentication, authorization, encryption, secure transmission). Perform code reviews, unit testing, and integration testing; mentor junior developers on best practices for integration development. Document integration workflows, API contracts, message formats, runbooks, and operational playbooks for support and auditability. Support production environments: triage incidents, perform root-cause analysis, and implement long-term fixes. 7+ years in software development, with significant exposure to integration projects. 7+ years .NET Framework / C#:— Strong object-oriented design, multi-threading, async programming, and real-world .NET application experience. 2+ Years ASP.NET / Web API: Building REST APIs and web applications. 2+ Years XML / XSLT / JSON: Complex XML transformations and JSON schema handling. 2+ years ADO.NET / Entity Framework / LINQ— Data access patterns, ORM usage, performance tuning. 4+ years IIS — Deployment and configuration of web applications and APIs. 2+ years Databases (SQL Server / Oracle) — Schema design, T-SQL/PL-SQL, stored procedures, indexing and query optimization. 3+ years Client-side scripting (JavaScript / jQuery / Angular)— Ability to implement front-end integration points and troubleshoot client-side issues. 4+ years API communication, WCF, REST webservices — SOAP/WCF experience plus REST API design and consumption. 3+ years Windows application programming - Experience building Windows services, scheduled jobs, or desktop integration utilities. 2+ years DevOps / CI-CD pipelines: Experience with build systems, release pipelines, automated deployments and basic infrastructure-as-code. Communication skills: Excellent verbal and written communication; experience creating API documentation and technical runbooks.