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# Senior / Principal .NET Backend Software Engineer

- **Company:** Motion Recruitment Partners LLC.
- **Location:** Newport Beach, CA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $140,000.0 - $160,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Access, .NET Framework, Application Programming Interfaces (APIs), Amazon Web Services, Amazon Cloudfront, Amazon S3, C Sharp (Programming Language), Software as a Service, Databases, Continuous Integration, Relational Databases, Distributed Systems, Amazon DynamoDB, Identity and Access Management, Key Management, PostgreSQL, Microsoft SQL Server, NoSQL, OAuth, OpenID, Role-Based Access Control, Redis, JSON Web Token, Amazon Simple Notification Service (SNS), Data Streaming, Transcoding, Snowflake, Backend, Cloudformation, Servicebus, Event Driven Architecture, Build Management, Amazon Relational Database Service, Kubernetes, AWS Fargate, Apache Kafka, Functional Programming, Cloudwatch, Api Gateway, Restful APIs, Amazon Simple Queue Service (SQS), Terraform, Dynatrace, Serverless Computing, Docker, Microservices
- **Published:** September 29, 2026
- **Apply:** https://www.dice.com/job-detail/8345daa8-ec28-4366-a5c4-e40cbac8729a

## About the Role

This is a hands-on role focused on C#/.NET, distributed systems, and AWS. You will develop APIs, event-driven services, and content ingestion workflows while improving the reliability and performance of a large backend platform. Principal-level candidates should also have experience leading the architecture of a substantial backend domain., * Advanced, hands-on C#/.NET experience building and operating production backend platforms, including APIs, background processing, and asynchronous workflows.

 * Experience with microservices at meaningful scale, including independently deployed services, event-driven design, queues, failure handling, and production observability.
 * Strong AWS experience building and operating production systems using services such as ECS/Fargate, EKS, Lambda, API Gateway, SQS, SNS, EventBridge, RDS/Aurora, DynamoDB, S3, CloudFront, IAM, or CloudWatch.
 * Sound judgment about serverless and container-based architecture, including performance, concurrency, runtime limits, operational needs, and cost.
 * Experience with a relational database such as SQL Server or PostgreSQL, a NoSQL database, and a cache such as Redis.
 * Hands-on experience with OAuth 2.0 or OIDC, JWT, role-based access control, secrets management, Docker, and CI/CD.
 * Experience managing AWS infrastructure through Terraform, CloudFormation, or similar tools.

Strongly Preferred

 * Production experience with Kafka or a comparable event streaming platform.
 * Kubernetes experience in addition to strong AWS platform experience.
 * Experience with high-throughput systems, media workflows, job orchestration, or multi-tenant SaaS.
 * A record of improving the cost, reliability, or performance of an existing AWS platform.
 * For Principal-level candidates, experience setting architecture for a substantial backend domain.

Nice to Have

 * Snowflake or analytics pipeline experience.
 * Familiarity with streaming, transcoding, or CDN technology.
 * Go experience.

## Description

* Design and build C#/.NET REST APIs, background workers, asynchronous workflows, and service-to-service integrations.
 * Improve microservice architecture, including service boundaries, messaging, retries, circuit breakers, and idempotency.
 * Build and operate services on AWS, selecting containers, serverless, or other compute options based on workload requirements.
 * Support content ingestion, processing, packaging, and delivery workflows for live and on-demand media.
 * Improve observability through metrics, logs, distributed tracing, alerting, and service level objectives.
 * Build security into services using authentication, role-based access, secrets management, and secure communication.
 * Guide technical decisions and help resolve complex production issues across services.