> Markdown version of [/jobs/ext/1987121-sr-software-engineer](https://www.wearedevelopers.com/jobs/ext/1987121-sr-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Software Engineer - **Company:** Atria Group LLC - **Location:** Bellevue, WA, United States - **Experience:** Expert - **Contract:** Temporary to permanent - **Skills:** ASP.NET, .NET Framework, Application Programming Interfaces (APIs), Unit Testing, Bootstrap (Software), C Sharp (Programming Language), Code Review, Databases, Continuous Integration, Relational Databases, Database Design, Software Design Patterns, Web Development, Memory Management, Microsoft SQL Server, NoSQL, Online Transaction Processing, Payment Service Provider, Software Engineering, SQL Stored Procedures, Transact-SQL, Web Services, AngularJS, Kendo Ui, Software Coding, Restful APIs - **Published:** August 8, 2026 - **Apply:** https://jobs.smartrecruiters.com/AtriaGroupLLC/83711497-sr-software-engineer ## About the Role C#,.NET 2.04.5 (ASP.Net, WCF, WF, ADO.Net, Asmx, WebAPI), Visual Studio 2010/2013 SQL Server 2008, Transact SQL, Stored Procedures o RDBMS database design, optimization and performance and/or NoSQL Excellent understanding of operational aspects of OLTP application and database systems. o Strong experience profiling and correcting memory usage and threading issues, and optimizing code for performance Unit Testing o Designing and Developing Web Applications using WebServices with understanding of commonly used design patterns Driven and self motivated. Work creatively to solve challenging problems Willingness to work with different technologies Qualifications Must have skills Candidate must be local. Candidates must be toptier, strong Full Stack developers. They need to understand the technology inside and out. Along with tools listed in the JD, candidate must also have at least 1 year of familiarity with Angular.js and Bootstrap. Restful API or other webpage API's would be great to have. Again, candidate must be a Full Stack developer, not just a UI developer. Nice to have skills Kendo UI and Handlebars.js are nice to have but not required. ## Description C# ASP.NET developers to help and develop the Authorize.Net applications As a software engineer in payment technology team you will help lead, design, enhance and build our services for Customers in an agile development environment. You will be working with colleagues, who will help, support and challenge you every day. Unit testing, code reviewing, and regular checkins for continuous integration is just part of your DNA. You will start out learning our systems from the ground up, helping to develop secure solutions to current problems. You will be working on a live production environment and will get excellent ecommerce experience that will help you throughout your career. Responsibilities: We expect our engineers to do much more than just writing code: Help our client to achieve their real goals by understanding the requirements and how it would help them in their business o Partner closely with teams to produce an application that flows seamlessly and works intuitively with our merchants Architect the next generation of Payment Services and Authorize.net Applications by leveraging newer technologies. Lead efforts to architect, design, build, iterate and manage our set of applications supporting various aspects of our global transaction processing systems Comfortable in leading meeting and discussions with nontechnical teams o Finding the best and most creative solution to many different types of problems ## Related Videos - [Building Multi-Tenant ASP.NET Core Applications: Best Practices and Real-World Solutions](https://www.wearedevelopers.com/videos/1552-building-multi-tenant-asp-net-core-applications-best-practices-and-real-world-solutions) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Why you must use TDD now!](https://www.wearedevelopers.com/videos/114-why-you-must-use-tdd-now) - [Angular Unleashed: Mastering Modern Web Development with Angular](https://www.wearedevelopers.com/videos/685-angular-unleashed-mastering-modern-web-development-with-angular) - [Developing ASP.NET Core Microservices with Dapr: A practical guide](https://www.wearedevelopers.com/videos/1528-developing-asp-net-core-microservices-with-dapr-a-practical-guide) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers)