Technical Profile & Core Competencies Backend & Data Architecture Enterprise .NET Development: Extensive commercial experience with C# and .NET, managing complex business logic within large, established codebases. Relational Database Design: Proficient in SQL Server and relational data modelling, including advanced schema design, optimization, and Entity Framework (EF) Core migration management. Data Integration & Automation: Skilled in writing SQL alongside scripting languages (Python or TypeScript) to handle data ingestion, reconciliation pipelines, and automated reporting. Access Control: Proven track record of implementing robust security architectures, specifically Role-Based Access Control (RBAC) and Row-Level Security (RLS) at the API layer. Cloud & Distributed Systems Azure Production Environments: Hands-on experience deploying and managing infrastructure via Azure App Services, containerized environments, Azure Pipelines (CI/CD), and Key Vault. Asynchronous Architecture: Expertise in building and maintaining background services and message consumers utilizing Azure Service Bus for scheduled jobs, reminders, and event-driven processing. Frontend & Performance Optimization Modern Frontend Web: Commercial experience with React and TypeScript, specifically managing complex client-side state and multi-step workflows. Performance-Constrained Engineering: Proven ability to build mobile-first web applications optimized for resource-constrained environments, including low-end Android devices and restricted browsers. Engineering Mindset & Adaptability Legacy Codebase Inheritance: Demonstrated ability to successfully adopt, navigate, and optimize existing, complex codebases written by other developers. Duties: Full-Stack Mentality: Demonstrates a holistic approach to development, with a willingness to work seamlessly across APIs, databases, and front-end architectures rather than specializing in a single layer. Autonomy & Proactivity: High level of self-direction, with a proven track record of taking initiative and driving projects forward independently. Product-Centric Outlook: Possesses a genuine curiosity about the overarching product strategy and market dynamics, ensuring technical solutions align with broader business goals. Modern Development Practices: Integrates AI-assisted development tools into daily workflows to optimize efficiency and code quality. Data & Analytics (Preferred but Learnable): Experience with ClickHouse or alternative columnar analytics databases (BigQuery, Snowflake, Redshift). Proficient in authoring complex aggregation reports. AI & LLM Integration (Critical for Role 1): Hands-on experience integrating LLM APIs, implementing tool-calling functionalities, or building Model Context Protocol (MCP) servers. Advanced Front-End & Streaming: Proficiency with Progressive Web Apps (PWAs), service workers, and push notifications, alongside experience implementing streaming UI patterns like Server-Sent Events (SSE) and incremental rendering. Observability & Testing: Familiarity with structured observability frameworks (e.g., OpenTelemetry) and modern end-to-end testing tools such as Cypress or Playwright. Domain Expertise: Prior exposure to captive portals, hotspots, Wireless Internet Service Providers (WISPs), or ISP platforms (highly valued but treated as a bonus rather than a strict filtering criterion). Please Note - Should you not hear back from us within the next 2 weeks, please consider your application as unsuccessful.