Asp.Net Lead Architect / Sr. Developer

Job descriptionFull TimeRemoteAbout the RoleCompany is seeking a highly experienced ASP.NET Lead Architect / Senior Developer to join our team.

This role is ideal for a deeply technical professional with proven experience in designing, optimizing, and maintaining high-performance systems within the .

NET 5 and Azure ecosystem.

You will play a critical role in ensuring scalability, cost efficiency, and top-tier performance of our technology stack while leading the development of new features and delivering timely bug fixes.This is a highly technical role, requiring advanced problem-solving skills, attention to detail, and the ability to mentor and guide peers in best practices.ResponsibilitiesArchitecture & OptimizationRevamp and fine-tune our ASP.NET web application stack for performance, cost effectiveness, and scalability.Design and optimize high-performance API services, proxy technologies, and multi-tenant database infrastructures.DevelopmentBuild new features across backend, web, and mobile applications.Ensure clean, maintainable, and scalable code with strong adherence to standards.Support legacy Xamarin components where necessary.Maintenance & OperationsQuickly troubleshoot and fix bugs.Oversee CI / CD pipelines to ensure smooth deployments.Work with monitoring and observability tools to maintain system health.CollaborationCollaborate closely with cross-functional teams (product, QA, DevOps).

Communicate clearly in English (spoken and written) with stakeholders across geographies.Handle "overly confident developers" tactfully, ensuring technical transparency and simplicity.Tech StackProgramming LanguagesC# / .

NET 5 / ASP.NET Core – Core backend services, API layer, and daemon servicesTypeScript + Angular – Shopify embedded apps, admin portal, CRM featuresReact Native (JavaScript / TypeScript) – Mobile apps (iOS / Android, offline capabilities)Liquid – Shopify storefront & embedded UI integrationXML – Domain modeling + code generation workflowsSQL (T-SQL) – Azure SQL Server (master + tenant databases)NoSQL (CosmosDB / MongoDB API) – Operational data, caching, and sync storageFrameworks & Libraries.NET 5 – Services and APIsXamarin.Forms – Legacy mobile componentsEntity Framework Core – ORM for SQL backendsMermaid – C4 diagrams (context / container / component)Custom XML CodeGen Tools – Auto-generating scaffoldingPlatforms & InfrastructureAzure Cloud – Core hosting environmentAzure SQL Database – Master + tenant-sharded storesAzure CosmosDB – JSON / NoSQL operational storeAzure Blob Storage – File storage (documents, exports, results)Azure Service Bus – Messaging, event routing, background jobsShopify – E-commerce storefront + embedded integrationSendGrid – Transactional / notification emailsKlaviyo – Marketing automation and campaignsCalendly – Scheduling integrationUSPS API – Label generation, shipping automationTwilio – SMS messaging and alertsObservability & OpsLogging / Tracing – Azure Monitor + custom observability layerMetrics – Prometheus-style metrics capture integrated with .

NET servicesBackup / Restore – Azure SQL backups + Mongo dump strategiesCI / CD – Git-based pipelines with automated deploymentsRequired Qualifications15+ years of professional development experience in complex systems.Deep expertise in ASP.NET Core, .

NET 5, and Azure.Strong understanding of multi-tenant architectures, performance optimization, and cost-effective scaling.Demonstrated ability to lead technical initiatives and mentor other developers.Advanced English (spoken and written) : capable of leading meetings, writing documentation, and engaging in negotiations.Proven track record of delivering high-quality, scalable systems.Soft SkillsTrustworthy, respectful, and honest.Hardworking and committed to delivery.High attention to detail.Collaborative, not difficult to work with, and effective in managing differing personalities within the team.Interview Process2–3 interview stages, including technical and behavioral assessments.Final decision made by Company's senior leadership in coordination with the hiring manager.