Senior Software Engineer

About the Role:

We are seeking an experienced Senior Software Engineer to join our software development team working on mission-critical financial technology applications. You will be responsible for developing and maintaining large-scale invoice processing, accounts payable, and document management systems serving enterprise clients across multiple industries. The ideal candidate brings hands-on experience in financial or B2B software, with a strong understanding of AP/AR workflows, Payments systems, and broader Finance domain processes.

Finance Domain Experience - Strongly Preferred:

Given the nature of our core products - invoice processing, vendor payment management, and AP automation - we place significant value on candidates with real-world experience in:

• Accounts Payable (AP) and/or Accounts Receivable (AR) software development or operational systems
• Payments platforms including ACH, wire transfer, virtual card, and payment processing workflows
• Invoice processing, purchase orders, remittance processing, and B2B document exchange (EDI)
• Financial Technology (FinTech) products serving enterprise or mid-market clients
• ERP integrations - SAP, Oracle, NetSuite, QuickBooks, Microsoft Dynamics, or similar platforms
• Audit trail design, financial data integrity, and compliance-aware software development
• Spend management, treasury operations, or general ledger (GL) system connectivity

Technical Skills:

Core .NET Technologies

• Advanced C# and VB.NET proficiency - mixed-language enterprise codebase
• .NET Framework 4.6-4.8 - extensive experience with legacy .NET Framework applications
• .NET 6/7/8 - modern .NET development for new platform initiatives
• ASP.NET Web Forms and MVC - maintain and enhance hybrid web applications
• ASP.NET Web API - build and maintain RESTful services and integrations
• Entity Framework - data access and ORM patterns (Code First and Database First)
• Windows Services - background processing services for document workflow automation

Web Technologies

• Blazor Server - build modern web UIs for SaaS platform
• AngularJS - maintain existing frontend components
• JavaScript/jQuery - legacy frontend maintenance with jQuery UI and validation
• XSLT transformations - XML-based templating systems
• Telerik UI Components - enterprise UI components for legacy and modern applications
• OAuth 2.0 & JWT - modern API authentication and security

Database & Data Technologies

• SQL Server - complex stored procedures, functions, and database design
• Database-first development - schema changes, migrations, and performance optimization
• ADO.NET - custom data access patterns and legacy integration
• Amazon S3 - cloud document storage and management

Architecture & Integration

• Multi-tenant SaaS architecture - customer-specific configurations and customizations
• EDI processing - Electronic Data Interchange (810, 850, 855, 856 transaction sets)
• File processing - CSV, XML, fixed-width file imports/exports
• SOAP/REST web services - external system integrations
• Payment processing integrations - financial system connectivity

DevOps & Infrastructure

• MSBuild and Visual Studio - build automation and deployment
• IIS deployment and management - Windows-based web application hosting
• Git version control - large enterprise codebase management
• PowerShell scripting - deployment and automation tasks
• Azure DevOps Pipelines - CI/CD with YAML configurations and automated testing
• NuGet Package Management - private Azure Artifacts feeds and dependency management

Preferred Qualifications:

• Bachelor's degree in Computer Science or related discipline.
• 5+ years of .NET development experience
• Finance/FinTech background - hands-on AP, AR, Payments, or financial software experience strongly preferred
• Strong SQL Server database design and optimization skills
• Self-motivated with ability to navigate complex, large codebases
• Strong problem-solving skills for debugging and optimizing enterprise applications
• Excellent communication skills for collaborating with business stakeholders and QA teams
• Experience with legacy modernization and gradual migration strategies