Sr. Application Developer
Contract to hire
Hybrid (1 day / week)
Pipersville, PA
Overview
The App Developer III is a senior full-stack .NET engineer responsible for leading development efforts, modernizing applications, and ensuring high-quality delivery across an organizations internal and customer-facing systems. This role combines hands-on coding with technical leadership, enabling the successful design, development, and optimization of .NET applications. The individual will mentor other developers, uphold coding standards, and participate in architecture and solution design for new initiatives.
Key Responsibilities
- Lead full-stack .NET development for enterprise applications and services
- Upgrade, refactor, and modernize existing .NET applications and websites
- Write scalable, testable code for .NET Core, C#, ASP.NET MVC, Web APIs, and SQL Server
- Participate in solution design, requirements gathering, and technical planning
- Mentor and support junior / mid-level developers; serve as escalation point for technical issues
- Conduct code reviews and enforce coding standards and best practices
- Troubleshoot and debug complex application or performance issues
- Bridge communication across onsite and remote development teams
- Assist in designing technical specifications and documentation
- Support production environments as needed
- Collaborate with project managers, product owners, and cross-functional stakeholders
Required Qualifications
10+ years of experience in full-stack .NET developmentStrong hands-on skills in :.NET Core, C#, ASP.NET MVCREST and / or SOAP API developmentSQL ServerFront-end frameworks : Angular or BlazorJavaScript, CSSExperience upgrading and modernizing legacy .NET applicationsStrong debugging and performance troubleshooting abilitiesExperience with microservices architecturePrior experience leading development teams or mentoring developersStrong understanding of design patterns and modern architecture practicesExcellent communication, problem-solving, and analytical skillsPreferred Qualifications
Experience with any of the following : RabbitMQ, Redis, MongoDB, DynamoDB, Graph databasesCloud design or AWS exposureFamiliarity with Power BI, Jira, or GitHub CopilotExperience creating wireframes, storyboards, or mockupsKnowledge of Agile methodologiesEight Eleven Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, national origin, age, sex, citizenship, disability, genetic information, gender, sexual orientation, gender identity, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state, and local laws