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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer II (.Net Developer) - **Company:** Paychex Inc. - **Location:** Chicago, IL, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** ASP.NET, JavaScript (Programming Language), .NET Framework, Adobe InDesign, Application Programming Interfaces (APIs), Agile Methodology, Business Logic, Software Applications, HTML5, Unit Testing, C Sharp (Programming Language), Cascading Style Sheets (CSS), Databases, Computer Engineering, Data Validation, Relational Databases, Database Design, Query Languages, Software Debugging, Middleware, Ember.Js, Entity Framework, Graphical User Interface, Apache Hadoop, Windows Communication Foundation, Systems Analysis, Knockout.js, Load Testing, MongoDB, MySQL, Model View Controller (MVC), Node.Js, NoSQL, Oracle (Applications), PowerBuilder, Product Software Implementation Methods, SQL Databases, Data Storage Technologies, SOAPAPI, AngularJS, Material UI, Information Technology, Free and Open-Source Software, Front End Software Development - **Published:** November 8, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=5c6a7369754b0693 ## About the Role * in Bachelor's in computer science, computer engineering or related field. - Preferred * 2 years of experience in a related area. * 2 years of experience in at least one of these frameworks: C#, SQL, ASP.Net, PowerBuilder, HTML 5.0, CSS, or JavaScript Frameworks. * 2 years of experience in front-end frameworks such as: MVC, Ember, Web Forms, Angular, KnockoutJS or Node. * Js. * 2 years of experience in middleware pattern such as: REST, Class Libraries as a Layer, WCF or SOAP Web Services. * 2 years of experience in data storage technology such as: Microsoft Entity Framework accessing the data, Relational Databases (SQL, Oracle, MySQL, etc.), or NoSQL Technologies (Hadoop, Mongo, etc.). * Ability to combine and integrate the above-mentioned elements as an effective full stack software developer. * Understanding of unit testing concepts and frameworks preferred. * Ability to be self-directed. * Familiar with an Agile environment. * Participation and familiarity with open source projects is a plus. ## Description As a Software Engineer II you are critical to the team's success and delivery of MVI's. Your primary role includes system analysis, coding, testing, debugging, documenting, and installing portions of new systems and modifying existing systems. To be successful in this role you need expertise in application and database design, as well as software implementation and graphical user interface design. Like the industry, we move fast. We need you to stay fresh with new technology, software and architecture so that you can innovate daily. As a Software Engineer II everyday will bring new technology challenges. Keep in mind that as an Agile team member you may be asked to step beyond coding and do whatever is necessary to help your team deliver in a sprint. Responsibilities: * Develop new applications, modify and maintain existing software, working closely with end-users, IT peers and management. * Make changes to prevent recurrence, modifying existing code and faulty files, writing and running special programs. * Participate in estimations, planning of feature releases, be involved in system feasibility check activities and developing design documentation. * Implement complex APIs using appropriate algorithms and data structures. * Extend features to existing software applications. * Analyze, design and develop complex business logic. * Develop UI components using JavaScript frameworks and optimize DOM rendering. * Participate in design and implementation of Database architecture. * Work together with peers, managers and quality assurance team to build a complete shippable product within the Agile methodology framework and track and report progress of deliverables. * Document the new applications, or the changes made to existing applications. * Participate in unit, integration, and business acceptance testing of the applications. * Develop automation for unit test cases for features. * Stimulate system load testing to identify performance issues, assess risk and highlight in a timely manner. * Fix defects identified during integration and user acceptance testing and complete defect root cause analysis. * Analyze production incidents and provide quick work around until it is fixed in future releases as well as troubleshoot application and system issues when required. * Monitoring event and exception logs for application to identify system issues and report and track any identified bugs. * Data validation & patching using SQL data query language. * Do whatever is necessary to get to your team's definition of done. * Stay current on emerging technologies.