Senior Full Stack Developer IL (Backend-Oriented)

Description Bagira is a leader in the field of training and simulation systems with a track record of delivering high-end, customized, cost-effective solutions for mission readiness. Bagira’s simulators are being used by hundreds of thousands of soldiers at more than 80 sites worldwide. Bagira is looking for a Senior Full Stack Developer (Backend-Oriented) with a strong backend orientation to join our engineering team. You will work on cloud-based applications in a matrix organization, taking full ownership of features from design through production. The role emphasizes backend architecture, scalability, and reliability, with frontend work focused on integration, usability, and performance. This is a full-time position, based at our headquarters in Modi'in. What will you do? Own features end-to-end: requirements, architecture, development, testing, deployment, and production support. Lead technical design for complex services, APIs, and integrations, considering scalability, performance, reliability, and maintainability. Design, develop, and maintain cloud-ready backend services using .NET (.NET Core), including REST APIs, background services, security, and data access layers. Drive system-level thinking across services, databases, and integrations with internal and external systems. Consume and maintain frontend components using modern frontend technologies, with focus on clean integration with backend services rather than heavy UI design. Collaborate closely with Product, QA, DevOps, and other engineering teams in a matrix environment while executing independently. Improve engineering standards and code quality through reviews, mentoring, and technical guidance, especially around frontend testing and maintainability. Troubleshoot complex production issues, perform root-cause analysis, and deliver long-term, robust fixes. Participate in estimations, planning, and technical decision-making, and influence the product roadmap through engineering insights. Requirements 6+ years of professional software development experience, with a strong emphasis on backend development and meaningful full-stack exposure. Strong backend design and architecture skills, including SOLID principles, clean code, modularization, and real-world system design experience. Deep expertise in .NET / .NET Core, including Restful API design, background processing, authentication and authorization, and integration patterns. Frontend experience with modern frontend technologies, including component-based design, state management, routing, and API consumption. Hands-on experience using AI-assisted development tools (e.g., Cursor/Copilot or similar) to improve productivity, code quality, debugging, and documentation, with good judgment and security awareness. Experience with cloud-native application development and operations on AWS, Azure and GCP. Strong experience with relational and non-rational databases (SQL Server, PostgreSQL, MongoDB, etc.), data modeling, indexing, and query optimization. Comfortable with CI/CD pipelines, source control (Git), and modern development workflows. Excellent debugging skills across backend, frontend, and infrastructure layers. Proven ability to work independently and take ownership in a matrix organization with minimal supervision. Excellent communication skills and ability to present technical decisions clearly while collaborating effectively with multiple stakeholders in a matrix environment.