A
.Net Backend Developer
Apolis
🇺🇸 United States
Hybrid
1 week ago
$35 – $40 / hour
- .NET
- REST API
- Microservices
- ACH
- ETL
- CRM
- Salesforce
- Java
- C#
- TypeScript
- Node.js
- SQL
- Data Modeling
- PostgreSQL
- MySQL
- RabbitMQ
- AWS
- SQS
- SNS
- Webhooks
- SOAP
- EDI
1 week ago
- Job Title: .Net Backend Developer
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Location : Remote
Position Overview
Key Responsibilities
- API & Service Architecture: Design, build, and maintain production-grade, secure RESTful APIs and microservices managing provider hierarchies, billing accounts, and payment lifecycle events.
- Event-Driven & Webhook Systems: Implement reliable, idempotent event consumers and webhook ingestion pipelines to process asynchronous notifications (e.g., ACH NOC events, banking state changes) with zero data loss.
- Data Migration & Modeling: Design normalized relational schemas and data transformation pipelines (DTOs, ETL backfills) to seamlessly migrate complex hierarchical records across platforms.
- Enterprise Integrations: Engineer reliable interfaces with external and internal partners—including CRM case management (Salesforce), tax identification verification (SOVOS), and banking validation services.
- State Machine & Workflow Automation: Develop scalable workflow engines and business rule decision trees governing automated verification gates (
Auto-Approved,Auto-Declined,Pending Review) and CSR portal operations. - Operational Excellence: Write comprehensive unit, integration, and contract tests, contribute to architecture reviews, and maintain clear API specifications.
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Required Qualifications
- 5+ years of professional experience in backend software engineering with statically typed languages (Java, C#, Go, or TypeScript/Node.js).
- RESTful API Engineering: Demonstrated mastery in designing, versioning, and documenting production REST APIs (handling deep pagination, complex DTO mappings, and high-throughput payloads).
- Relational Databases & SQL: Strong experience in relational data modeling (PostgreSQL, MySQL, or SQL Server), complex joins, foreign-key relationships, index optimization, and data migration scripting.
- Distributed Systems & Event Architecture: Hands-on experience with message brokers/event buses (e.g., Kafka, RabbitMQ, AWS SQS/SNS) and designing idempotent consumers for webhook and asynchronous event handling.
- Enterprise Integration Patterns: Proven background integrating with third-party webhooks, REST/SOAP APIs, and handling retry strategies, circuit breakers, and distributed error handling.
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Preferred Qualifications
- Prior experience in FinTech, Payment Processing, or Healthcare Payer/Provider Systems (familiarity with ACH, NACHA rules, NOC codes, TIN/NPI validation, or 835 EDI transactions).
- Experience integrating with Salesforce APIs (e.g., automated Case and Contact management).
- Familiarity with secure credential handling, financial compliance, and PII/PHI data privacy standards.
.Net Backend Developer · Apolis