Senior Fullstack Developer

Description

• Design and build business logic and domain modules in an ASP.NET Core API following Clean Architecture principles (Domain, Application, Infrastructure, API layers). • Build and maintain asynchronous background processing services (a .NET worker) for document-heavy workflows, coordinated through message queues. • Develop and maintain multiple Next.js/React applications serving different user populations (internal operations/back-office tooling and external/customer-facing portals), sharing a common package layer. • Design relational data models and write efficient data access code (EF Core / PostgreSQL). • Integrate with cloud-native infrastructure: message queues, blob storage, secrets management, and managed identity providers. • Implement authentication and authorization across multiple identity boundaries (workforce vs. external/customer identity). • Collaborate on API contracts and shared TypeScript types consumed by front-end applications. • Participate in architectural decisions that keep a growing monolith modular, maintainable, and well-tested (unit, integration, contract, and architecture tests). • Work within a human-in-the-loop product model: build tooling that lets operators review, correct, and approve AI-assisted extraction results, with full traceability of how each data point changed from raw intake to final approval. • Write and maintain automated tests across the stack and participate in CI/CD pipeline health. • Participate in code review, technical design discussions, and mentor less experienced engineers.

Requirements

• 8+ years of professional software development experience, with deep expertise in C# / .NET (ASP.NET Core). • 4+ years building production front-end applications with React, including Next.js (App Router, server components/actions, route handlers). • Strong understanding of Clean/Layered Architecture, domain modeling, and separation of concerns in non-trivial back-end systems. • Experience with relational databases and ORMs (EF Core or equivalent), including migrations and query performance. • Solid TypeScript skills and comfort working in a monorepo with shared, versioned internal packages. • Experience with cloud infrastructure (Azure preferred; AWS/GCP equivalents considered) — messaging/queues, object storage, secrets management. • Experience implementing or integrating OAuth2/OIDC-based authentication, ideally with enterprise identity providers (e.g., Microsoft Entra ID or similar). • Strong automated testing discipline: unit, integration, and contract testing on both back end and front end. • Comfortable working across the full stack without hand-offs — from database schema to API to UI. • Excellent communication skills and experience working in a small, senior, high-autonomy engineering team.

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