Job Title: Senior GraphQL Integration Engineer / Subject Matter Expert (.NET) Location: Washington, DC (Hybrid / Approved Remote) Engagement Type: Full - Time Clearance: Able to obtain Public Trust clearance upon hire Role Overview Stackular is seeking a highly experienced GraphQL Integration Engineer with Subject Matter Expertise to support a federal clients GraphQL modernization initiative. This role blends hands-on engineering execution with architectural leadership and advisory responsibilities. You will play a critical role in designing, building, and governing a federated GraphQL ecosystem while collaborating with cross-functional teams in a modern .NET-based environment. This position is ideal for professionals who can both write production-grade code and guide architectural decisions at scale. Key Responsibilities Architecture & Advisory Provide technical leadership on GraphQL federation architecture (Apollo Federation / schema composition) Define and enforce schema governance,...