**Job Title: Senior Application Developer** **Location: Seattle WA - Onsite** **Duration: 12 Months** **Rate: $70/hr. on W2** **Job Description:** We are seeking a **Senior Application Developer** to design, develop, and maintain high-performing applications. The ideal candidate will have extensive experience in **C#, ASP.NET, Web API, and .NET Core** , along with hands-on expertise in cloud-based development, preferably **Azure** . This role requires strong problem-solving skills, the ability to work in a fast-paced environment, and a passion for building scalable, high-quality applications. **Key Responsibilities:** + Design, develop, and implement robust application solutions using **C#, ASP.NET, Web API, and .NET Core** . + Develop, deploy, and maintain applications on major cloud platforms ( **Azure preferred** , AWS, or GCP). + Work with **relational and NoSQL databases** to ensure efficient data storage and retrieval. + Take ownership of application features, ensuring timely and high-quality delivery. + Collaborate with cross-functional teams to define application requirements and system architecture. + Implement best practices for **performance, security, and scalability** in application development. **Required Qualifications:** + **7+ years** of experience in **application development** using **C#, ASP.NET, and Web API** . + **2+ years** of hands-on experience with **.NET Core** . + **2+ years** of experience developing cloud-based applications (Azure preferred, AWS, or GCP). + **5+ years** of experience working with **relational and NoSQL databases** . + Strong analytical, problem-solving, and organizational skills. + Excellent communication and interpersonal skills. + Bachelor’s degree in **Computer Science** or a related field, or equivalent experience. **Preferred Qualifications:** + **3+ years** of experience working with **Azure** , including Cosmos DB, App Services, Azure Functions, Azure Service Bus, and Event Hub. + Experience designing and implementing **large-scale distributed systems** and service-oriented architectures. + Strong expertise in **migrating monolithic applications** to cloud-based microservices. + **2+ years** of experience in **CI/CD automation** , infrastructure management, and monitoring. + Experience supporting applications in a **24x7 production environment** . + Exposure to **Go** is a plus. + Passion for quality, attention to detail, and a proactive approach to innovation. **Key Skills:** + Strong collaboration and teamwork abilities. + Ability to prioritize tasks effectively in a fast-paced environment. + Excellent written and verbal communication skills. + Ability to quickly learn and adapt to new technologies. + Strong problem-solving and troubleshooting skills. If you're a results-driven developer passionate about building high-quality applications and driving innovation, we’d love to hear from you! ManpowerGroup is committed to providing equal employment opportunities in a professional, high quality work environment. It is the policy of ManpowerGroup and all of its subsidiaries to recruit, train, promote, transfer, pay and take all employment actions without regard to an employee's race, color, national origin, ancestry, sex, sexual orientation, gender identity, genetic information, religion, age, disability, protected veteran status, or any other basis protected by applicable law.