About the job Senior Full-Stack Engineer - C# About Us: At International Development Resources (IDR), we believe that our greatest asset is our people. We're a diverse, passionate, and forward-thinking team that values creativity, collaboration, and continuous learning. When you join IDR, you become part of a global network dedicated to building technology that transforms businesses and makes a real-world impact. The opportunity: Our engineering team maintains a high-traffic SaaS platform that serves thousands of daily users, balancing immediate performance needs with long-term architectural health. You will step in as a Senior Full-Stack Engineer to take primary ownership of the full application lifecycle, from high-level design to deployment. By joining us, you gain the autonomy to dictate our technical trajectory and ensure our infrastructure scales reliably as we introduce new features. What you’ll own Build new features across our entire stack, ensuring code remains performant, secure, and maintainable for a multi-tenant environment. Design the evolution of our microservices architecture and robust RESTful APIs to facilitate seamless communication between services. Optimize data persistence strategies by managing and fine‑tuning both SQL and NoSQL database solutions. Lead technical decision‑making and mentorship, guiding junior team members while collaborating with product and DevOps groups. Required Qualifications 10+ years of professional software development experience. Expert‑level knowledge of C#/.NET Core and React. Proven experience with REST API design and microservices architecture. Strong knowledge of cloud platforms, particularly AWS. Proficient with both SQL (e.g., PostgreSQL, SQL Server) and NoSQL (e.g., MongoDB, DynamoDB) databases. Experience with containerization (e.g., Docker) and CI/CD pipelines. Solid understanding of SaaS architecture, multitenancy, and system scalability. Excellent communication and collaboration skills. Nice-to-haves Experience in a SaaS or multi‑tenant environment at scale. Familiarity with event‑driven systems, serverless functions, or message queues. Hands‑on experience with DevOps tools and infrastructure‑as‑code (e.g., Terraform) Why Join Us? A Culture of Respect & Teamwork: We believe in treating everyone with kindness, working unitedly, and growing as one team. Embrace Growth & Innovation: We are perpetual learners, motivated to improve ourselves and the company, and we welcome new ideas that drive transformation. Customer‑Focused Excellence: We are dedicated to serving our customers with innovation and excellence, understanding that their success fuels ours. Competitive compensation and benefits package #J-18808-Ljbffr