Senior .NET Integration Developer

U.S. Legal Support•Houston, TX

About The Position

We are seeking a Senior .NET Integration Developer to design, develop, maintain, and support integrations between internal applications and external systems. This role requires strong hands-on technical skills, production troubleshooting experience, and the ability to independently deliver reliable integration solutions. This person will own third-party integrations end to end: building and supporting them, working with clients and partners on setup and issues, and helping migrate existing scheduled integration jobs to a more stable job-processing platform. The ideal candidate will have strong experience with .NET, C#, REST APIs, SQL, and third-party integrations, along with the ability to work with internal and external teams to troubleshoot and resolve complex integration issues.

Requirements

5+ years of professional software development experience, with significant experience developing applications and integrations
Strong hands-on experience with .NET / .NET Core, C#, and RESTful APIs
Experience developing and supporting internal and external integrations
Experience working with third-party/external APIs and authentication mechanisms
Strong understanding of HTTP, JSON, XML, and common integration patterns
Experience with MS SQL Server, MySQL/MariaDB, or equivalent relational databases
Proficiency with Git and source code repository practices
Experience with Azure DevOps and CI/CD pipelines
Experience troubleshooting production applications and performing root cause analysis
Demonstrated experience working directly with clients, external partners, or business stakeholders on technical projects or integrations
Strong written communication skills, with the ability to clearly document and communicate technical issues, requirements, solutions, and project status
Bachelor's degree in Computer Science or related field, or equivalent professional experience
Strong written and verbal communication skills
Ability to communicate effectively with both technical and non-technical audiences
Professional and confident communication with clients and external partners
Strong hands-on development and integration skills
Advanced troubleshooting and analytical abilities
Strong understanding of API design and integration patterns
Ability to independently solve complex technical problems
Strong focus on code quality, reliability, security, and maintainability

Nice To Haves

Experience with Hangfire or similar background-job / scheduling platforms
Experience migrating scheduled jobs, console apps, or legacy batch processes to a modern job platform
Experience with Salesforce or other enterprise / case-management platforms
Experience with document management or document-based integrations
Experience with SFTP and file-based integrations
Experience with AWS services such as S3, EFS, SES, SNS, Lambda, or EC2
Experience modernizing or migrating legacy applications to modern .NET
Experience working with legacy Java applications
Working knowledge of Linux environments
Experience with automated testing and application monitoring
Experience using AI-assisted coding tools such as GitHub Copilot, Cursor, or similar tools.

Responsibilities

Design, develop, and maintain .NET-based integrations and RESTful APIs.
Develop and support integrations between internal applications, services, databases, and external systems.
Work with external APIs, webhooks, SFTP, web services, file-based integrations, and other integration mechanisms.
Implement data transformation, validation, error handling, retry mechanisms, and logging.
Configure and maintain firm- or partner-specific mappings, credentials, and integration settings.
Support existing scheduled integration jobs currently running across mixed platforms.
Help migrate those jobs to a more reliable job-processing platform (such as Hangfire), including scheduling, retries, monitoring, and failure alerting.
Improve reliability by reducing silent failures, duplicate runs, and hard-to-support job wrappers.
Maintain and improve automated notifications related to job success, failure, and operational status.
Troubleshoot and resolve complex production and integration issues.
Perform root cause analysis and implement permanent fixes.
Analyze application logs, API responses, database records, and integration workflows to identify issues.
Work with infrastructure teams, vendors, and external partners to resolve issues spanning multiple systems.
Participate in client meetings to understand integration requirements, troubleshoot issues, and communicate technical solutions.
Communicate directly with clients and external partners regarding integration setup, API requirements, testing, issues, and deployment activities.
Lead technical onboarding for new integrations, including gathering requirements, coordinating testing, and supporting go-live.
Prepare clear and professional email communications for technical and non-technical audiences.
Coordinate with clients and internal teams to track integration issues, dependencies, and action items.
Translate technical details into clear business-friendly explanations when working with clients.
Participate in technical design and architecture discussions.
Perform code reviews and follow established coding and security standards.
Contribute to CI/CD pipelines and deployment processes.
Create and maintain technical and operational documentation.