Senior .NET Integration Developer

Req ID:
347887

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now.

We are currently seeking a Senior .NET Integration Developer - REMOTE (Canada) to join our team in Toronto, Ontario (CA-ON), Canada (CA).

We are seeking an experienced a .NET Integration Developer with a minimum of 7 years of proven experience building and maintaining enterprise integration solutions. The ideal candidate will be a hands-on developer comfortable with the .NET stack, API-driven architectures, XML/JSON transformations, database development, and CI/CD practices. Strong communication skills and the ability to work with cross-functional teams are essential.

Day to Day Responsibilities:

• 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.

MINIMUM REQUIREMENTS:

• 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.

Other Desired Skills:

• 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.

LI-NorthAmerica
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About NTT DATA
NTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.

Whenever possible, we hire locally to NTT DATA offices or client sites. This ensures we can provide timely and effective support tailored to each client's needs. While many positions offer remote or hybrid work options, these arrangements are subject to change based on client requirements. For employees near an NTT DATA office or client site, in-office attendance may be required for meetings or events, depending on business needs. At NTT DATA, we are committed to staying flexible and meeting the evolving needs of both our clients and employees. NTT DATA recruiters will never ask for payment or banking information and will only use and email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form,

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