Senior Backend Engineer - Fintech SaaS, AWS, C#/ASP.NET

Omnicommander; Brentwood (TN); Sur place; USD 120 000 - 170 000; Plein temps

Avantages offerts par ce poste

Company Paid Holidays

PTO Days (Paid Time Off)

PTO Day for your birthday

Medical Insurance

Company Paid Life Insurance

401(k)

Résumé du poste

OMNICOMMANDER is a fast-growing fintech company hiring a senior backend engineer for cloud-hosted services. You will design, build, and operate backend systems using C#, ASP.NET Core, PostgreSQL, and AWS, delivering secure, multi-tenant SaaS applications.

You will mentor teammates, guide technical decisions, and stay close to the codebase while collaborating with Product, QA, and Design in a SOC 2 oriented environment. This is an on-site role in Brentwood, TN or Santa Rosa Beach, FL.

Qualifications

• 6+ years of senior backend engineering experience with ownership of production systems.
• Advanced C# and ASP.NET Core experience, modern .NET features, asynchronous programming, DI and API design.
• Strong PostgreSQL/EF Core skills including schema evolution and migrations.

Responsabilités

• Own design, implementation, and maintenance of REST APIs and backend services with C#, ASP.NET Core, EF Core.
• Design PostgreSQL schemas, migrations, and optimize data access and queries.
• Build and support workloads on AWS with Docker, ECS/Fargate, Lambda, S3, SQS.
• Implement secure authentication/authorization with JWT/OIDC and tenant isolation.
• Deliver well-tested code through unit/integration tests, PRs, CI/CD, safe deployment and rollback.
• Investigate production defects and performance issues using logs to identify root causes.
• Collaborate with Product, QA, Design, and engineering peers; mentor teammates and communicate tradeoffs.
• Strengthen secure development practices and SOC 2 readiness controls.

Connaissances

Senior backend

C#

ASP.NET Core

PostgreSQL

AWS

Security-minded

English communication

Outils

Terraform

AWS IAM/CloudFront

SignalR/WebSockets

Redis

DynamoDB

GitHub CI/CD

Docker

KMS/WAF

Description du poste

OMNICOMMANDER is a fast-growing fintech company hiring a senior backend engineer for cloud-hosted services. You will design, build, and operate backend systems using C#, ASP.NET Core, PostgreSQL, and AWS, delivering secure, multi-tenant SaaS applications.

You will mentor teammates, guide technical decisions, and stay close to the codebase while collaborating with Product, QA, and Design in a SOC 2 oriented environment. This is an on-site role in Brentwood, TN or Santa Rosa Beach, FL.