Sr. Backend Developer

Systemates INC•Richardson, TX

1d•$115,000 - $135,000•Hybrid

About The Position

The Sr. Backend Developer is a senior individual contributor responsible for designing, building, and maintaining the server-side architecture that powers the Projectmates platform. You will own complex backend systems end-to-end — from database design and API development to performance optimization and cloud infrastructure — while serving as a technical mentor to other developers on the team. This position reports to the Development Manager.

Requirements

5+ years of professional software development experience with a strong backend focus
Expert-level proficiency in C# and the Microsoft .NET technology stack (.NET Core, ASP.NET)
Deep experience with Azure SQL Server — query optimization, indexing strategies, and complex database object development
Proven experience designing and building RESTful APIs consumed by modern frontend frameworks
Solid understanding of Azure cloud services — including App Services, Azure DevOps, and related infrastructure
Experience with JavaScript and familiarity with ReactJS sufficient to collaborate effectively with frontend team members
Strong grasp of software architecture principles — separation of concerns, SOLID principles, design patterns
Excellent problem-solving, communication, and collaboration skills

Nice To Haves

Experience with third-party API integrations a strong plus
Bachelor's degree in computer science, Software Engineering, or related field preferred; equivalent experience considered

Responsibilities

Design and develop robust, scalable backend systems and RESTful APIs supporting the Projectmates web application
Own database architecture including stored procedures, views, triggers, functions, and schema design in Azure SQL
Lead performance tuning and optimization of backend services and database queries
Collaborate with frontend developers to define and implement API contracts that support a ReactJS-based UI
Participate actively in code reviews, enforcing best practices, security standards, and software craftsmanship
Investigate and resolve complex system faults, identifying root causes and implementing permanent fixes rather than workarounds
Contribute to architectural decisions — evaluating current system design and recommending improvements for scalability, reliability, and maintainability
Support third-party integrations and API connections with external platforms
Write comprehensive unit and integration tests and champion test-driven development practices
Mentor other developers through code reviews and technical guidance
Perform other duties and special projects as assigned