Nathan Herrmann
Software Engineer II
| đź“Ť South Bend, Indiana |
đź“ž 801-368-7037 |
✉️ NathanJHerrmann@gmail.ccom |
đź”— [LinkedIn URL] |
Summary
Software Engineer with 5+ years of experience building and maintaining enterprise-grade financial software on the NetSuite platform. Specialized in SuiteScript 2.x development, payment processing systems (ACH/NACHA, cross-border, AvidPay), and cloud-based middleware solutions using C# and Azure. Proven track record of leading feature development, migrating legacy systems, and delivering reliable releases across multiple product lines.
Skills
Languages & Frameworks
- JavaScript / SuiteScript 2.x
- C# / .NET 6
- Entity Framework Core
NetSuite Development
- SuiteScript 2.x
- SuiteApp Development Framework (SDF)
- Custom Record Types, Saved Searches, Portlets, Dashboards
- Bundle Deployment & Release Management
Cloud & Infrastructure
- Microsoft Azure (Blob Storage, Service Bus, Azure Functions)
- Azure DevOps
Practices & Patterns
- Test-Driven Development (TDD)
- SOLID Principles, Clean Code, Domain-Driven Design
- Agile / Scrum
- CI/CD
Experience
AvidXchange — Charlotte, NC (Remote)
Software Engineer II | 2020 – Present
AvidXchange is a B2B payments and accounts payable automation company. As a member of the NetSuite product team, I design, develop, and maintain SuiteApps that integrate NetSuite with AvidXchange’s payment platform.
Payment Processing (AvidPay, FastPay, NACHA/ACH)
- Rebuilt the AvidPay and FastPay process payments search to support more than 4,000 records and improve page load performance, resolving critical production slowness issues
- Converted AvidPay and FastPay payment submission to a Map/Reduce architecture, enabling parallel processing of large payment batches (50+ payments)
- Designed and implemented the NACHA/Standard ACH payment flow end-to-end, including new custom record types, process payments page, ACH account setup, and required field validation
- Added support for Customer Refunds and Expense Reports in AvidPay XML payloads
- Resolved multiple production defects including duplicate batch creation on page refresh, incorrect payment dates, and malformed vendor address data in XML submissions
- Implemented a cleared check image suitelet for retrieving check images from AvidXchange’s API
- Added descriptive inline error messaging for failed payments on the process payments page
Cross-Border Payments (CBP)
- Developed the full OAuth 2.0 authentication flow for CBP, including token request, token management, and credential storage in a custom NetSuite record
- Built the CBP Vendor Account setup feature, covering country/currency selection, form parsing, funding account enablement, and API interactions
- Implemented
Initiate Authentication and Receive and Record Authentication Response user stories as part of the CBP API integration
- Resolved defects in funding account creation error handling and CBP account record field persistence
Approvals & Invoice Workflows
- Converted the Approvals pages from SuiteScript 1.0 to SuiteScript 2.0, including resolving the 1,000-vendor limit
- Developed a Dashboard Portlet for daily approvals reminders using saved searches
- Implemented Approval Plugins architecture, allowing modular approval routing logic
- Added invoice image links to the payments approval page for improved reviewer context
- Built the
Set Initial Approval Status and Retry Assigning Approval Status features for newly created payments
AFN Middleware (Azure)
- Built and tested Azure Blob Storage access via a C# class library, including permissions research and proof-of-concept work
- Developed the Notifications Processor Function App using Azure Functions
- Implemented the
NetSuite Account Record middleware data model (Debtor Info, Creditor Info, Payment Info Merge) across multiple user stories
- Contributed to Azure Service Bus and Entity Framework proofs of concept for the AFN middleware platform
SuiteApp–to–SDF Migration
- Researched and led the plan to migrate the team’s development workflow from classic bundle development to SuiteApp Development Framework (SDF)
- Performed test bundle conversion, assessed customer impact, and documented findings
- Executed multiple SuiteApp release submissions to the NetSuite Marketplace
ACH & Positive Pay File Generation
- Converted ACH File Generation and Positive Pay File Generation pages to SuiteScript 2.0
- Implemented fix for ACH file gen issues related to iframe/cookie handling in various browsers
- Added ACH File Gen fields and Company ID requirements to the process payments page
Bundle & Release Management
- Executed 10+ versioned release cycles across PAY, BS, CBP, and AFN product lines (2021–2025), including bundle versioning, script locking, changelog updates, and QA deployments
- Managed release readiness for product versions including Jelly Bean, Helium, Lithium, Beryllium, Boron, and Begonia
Other Contributions
- Developed an auto-create Bills feature for syncing invoices from AvidInvoice into NetSuite as Bill records
- Built the
Copy Customer Script Permissions on Bundle Install feature to automate permission propagation
- Added field-level character validation for AvidPay payment submissions
- Implemented in-app sunset messaging for the classic bundle
- Designed configurable test environment targets to support QA flexibility across dev accounts
Education
University of Utah — Salt Lake City, UT
Bachelor of Science in Computer Science | Graduated 2020
Certifications
- NetSuite SuiteScript 2.0 Developer II (in progress)
- Microsoft AI Fundamentals (in progress)
References available upon request.