Flexstaf It

60 jobs near Columbus, OH

We are seeking an experienced Web Services & Application Developer with strong C#, ASP.NET, and SQL Server capabilities to maintain, modernize, and enhance legacy web applications, REST services, and ...

Job Title: Project Manager - Digital Health Location: Onsite (Manitoba) Duration: July 2, 2026 - March 31, 2027 (with possible extension to June 30, 2027) Engagement Type: Full-Time Contract Overview ...

8+ years experience Lead end-to-end delivery of Azure cloud application projects, managing timelines, scope, risks, and quality across multiple workstreams. 8+ years experience Coordinate and guide ...

... IT colleagues to implement products, conduct reviews, resolve operational problems, and support business partners in effective use of cloud-based data and analytics products. - Analyze complex ...

Experience designing the overall functionality of the product, and in order to ensure a great user experience, iterate upon it in accordance with user-testing * Experience designing and delivering ...

New

Technical Support Analyst

Ottawa, ON · On-site

CA$40 - CA$45/hr

Create and modify users' profiles as required following IT standards. Update users' official title and department access when needed. * Create and modify users' accesses on client systems. Ensure ...

Create and modify users' profiles as required following IT standards. Update users' official title and department access when needed. * Create and modify users' accesses on client systems. Ensure ...

We are seeking an experienced Web Services & Application Developer with strong C#, ASP.NET, and SQL Server capabilities to maintain, modernize, and enhance legacy web applications, REST services, and ...

Stakeholder management and reporting I&IT wide performance KPIs Identify drivers to costs in IT operations and their corresponding savings levers. Align with stakeholders on delivering savings and ...

· 8+ years experience Lead end-to-end delivery of Azure cloud application projects, managing timelines, scope, risks, and quality across multiple workstreams. · 8+ years experience Coordinate and ...

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Senior Web Developer

Toronto, ON

Full-time

Posted 18 days ago


Job description

We are seeking an experienced Web Services & Application Developer with strong C#, ASP.NET, and SQL Server capabilities to maintain, modernize, and enhance legacy web applications, REST services, and SOAP web services. In this role, you will bridge the gap between web application maintenance and backend service integration, ensuring system stability, building secure APIs, and optimizing complex database workflows.

Key Responsibilities
  • Application & API Development: Design, build, and maintain Web API services, REST Services, SOAP web services, and existing ASP.NET applications using C#, .NET Framework, HTML5, CSS3, JavaScript, and AJAX.
  • Service Integration & Modernization: Develop and consume RESTful APIs and SOAP/WCF web services to enable seamless integration across enterprise platforms and legacy architectures.
  • Backend Data Engineering: Write complex SQL queries, stored procedures, user-defined functions, triggers, and views in T-SQL, optimizing database performance and data exchange workflows.
  • Legacy Refactoring & Security: Identify performance bottlenecks in web applications and web services; refactor and optimize C# code and database scripts for performance, scalability, and security (e.g., OWASP compliance, SQL injection prevention).
  • System Support & Integration: Support system integration testing, debug web service communication, resolve production issues, and document technical architecture and API endpoints.
Required Qualifications
  • Experience: 5+ years of professional software development experience with C#, ASP.NET, Web Services, and Microsoft SQL Server.
  • Core Tech Stack: Deep proficiency in C#, ASP.NET, REST Services (Web API), and SOAP Services (WCF / ASMX), alongside front-end fundamentals (JavaScript, jQuery, HTML5, CSS3).
  • Web Services & API Design: Strong hands-on experience designing, consuming, and securing RESTful JSON endpoints and XML-based SOAP contracts (WSDL, XSD, SOAP envelopes).
  • T-SQL Mastery: Advanced skills in writing and optimizing complex T-SQL queries, stored procedures, execution plans, and database indexing to support service payloads.
  • Version Control: Experience with Git, Azure DevOps, or Team Foundation Server (TFS).
Preferred Qualifications
  • Experience migrating legacy ASP.NET applications and SOAP services to modern frameworks (ASP.NET Core, RESTful microservices, Angular, or React).
  • Deep understanding of IIS server configuration, SSL/TLS certificates, and API security authentication models (OAuth 2.0, JWT, API Keys, Basic Auth).
  • Knowledge of cloud platforms (Azure Web Apps, Azure API Management, Azure SQL) or C# unit testing frameworks (xUnit, NUnit, Moq)