Senior Full-Stack Engineer - Fintech, AWS & AI

Omnicommander; Brentwood (TN); On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

Company Paid Holidays

PTO Days (Paid Time Off)

PTO Day for your birthday

Medical Insurance

Company-paid life insurance

401(k)

Job summary

OMNICOMMANDER, Inc. is seeking a hands-on Senior Full-stack Engineer to own customer-facing features from accessible React and TypeScript interfaces through C#/.NET web APIs and PostgreSQL data.

This on-site role is located in Brentwood, TN or Santa Rosa Beach, FL and reports to the Software Engineering Manager. You will work with Product, Design, and QA, build secure, scalable SaaS components, and contribute to SOC 2 readiness while mentoring teammates and delivering reliable releases.

Qualifications

• 8+ years of engineering experience delivering production SaaS applications.
• Strong React and TypeScript experience including component architecture, state management, navigation, API integration, and performance.
• Hands-on C#/.NET experience building and maintaining production APIs and backend services.
• Strong PostgreSQL fundamentals including schema design, migrations, transactions, query optimization, and data integrity.
• Experience building secure SaaS software with authentication, authorization, and data protection.
• Automated testing across the stack, code reviews, CI/CD practices, AWS deployments, and production troubleshooting.
• Ability to communicate clearly in English (B2+), work across teams, and mentor other engineers.

Responsibilities

• Design and build accessible, responsive React and TypeScript interfaces with reusable components and consistent design patterns.
• Own features end-to-end, connecting frontend behavior and state management to API contracts and data.
• Develop and maintain secure C#/.NET web APIs with thoughtful data models, validation, performance considerations, and reliable changes.
• Apply modern frontend tooling and architecture for scalable, intuitive experiences.
• Follow secure development practices including authentication, authorization, data protection, and safe input handling.
• Build and support AWS cloud-native solutions using containers, serverless approaches, and modern CI/CD practices.
• Write automated frontend, backend, and integration tests; review code, document decisions, and assist in safe, repeatable releases.
• Investigate and resolve production issues across UI, API, and data layers; mentor teammates and contribute to SOC 2 readiness.

Skills

React

TypeScript

C#/.NET

PostgreSQL

AWS

CI/CD

Automated testing

Security best practices

Mentoring

English communication

Tools

React tooling

TypeScript tooling

SQL tooling

Git

Job description

OMNICOMMANDER, Inc. is seeking a hands-on Senior Full-stack Engineer to own customer-facing features from accessible React and TypeScript interfaces through C#/.NET web APIs and PostgreSQL data.

This on-site role is located in Brentwood, TN or Santa Rosa Beach, FL and reports to the Software Engineering Manager. You will work with Product, Design, and QA, build secure, scalable SaaS components, and contribute to SOC 2 readiness while mentoring teammates and delivering reliable releases.