Senior Fullstack Developer

This is a fully remote position, open to applicants in United States.

📋 Description

• Design and develop business logic and domain modules within an ASP.NET Core API, adhering to Clean Architecture principles (Domain, Application, Infrastructure, API layers).

• Create and sustain asynchronous background processing services (a .NET worker) for workflows that involve extensive document handling, managed through message queues.

• Build and maintain various Next.js/React applications catering to different user groups (internal operations/back-office tools and external/customer-facing portals), utilizing a shared package layer.

• Design relational data models and produce efficient data access code (EF Core / PostgreSQL).

• Integrate with cloud-native infrastructures: message queues, blob storage, secrets management, and managed identity providers.

• Implement authentication and authorization across diverse identity boundaries (workforce versus external/customer identity).

• Collaborate on API specifications and shared TypeScript types utilized by front-end applications.

• Engage in architectural decisions that maintain a scalable monolith, ensuring it remains modular, maintainable, and well-tested (unit, integration, contract, and architecture tests).

• Operate within a human-in-the-loop product framework: develop tools enabling operators to review, amend, and approve AI-assisted extraction results, ensuring full traceability of data transformations from raw intake to final approval.

• Write and uphold automated tests across the technology stack and contribute to the health of the CI/CD pipeline.

• Take part in code reviews, technical design discussions, and mentor junior engineers.

⛳️ Requirements

• 8+ years of professional software development experience, with extensive expertise in C# / .NET (ASP.NET Core).

• 4+ years of experience in developing production front-end applications using React, including Next.js (App Router, server components/actions, route handlers).

• Strong grasp of Clean/Layered Architecture, domain modeling, and the separation of concerns in complex back-end systems.

• Proficiency with relational databases and ORMs (EF Core or equivalent), including migrations and optimizing query performance.

• Solid TypeScript skills and a comfort level working within a monorepo featuring shared, versioned internal packages.

• Experience with cloud infrastructure (Azure preferred; AWS/GCP equivalents will be considered) — messaging/queues, object storage, secrets management.

• Background in implementing or integrating OAuth2/OIDC-based authentication, preferably with enterprise identity providers (e.g., Microsoft Entra ID or similar).

• Strong discipline in automated testing: unit, integration, and contract testing on both back end and front end.

• Ability to work comfortably across the entire stack without hand-offs — from database schema to API to UI.

• Exceptional communication skills and experience collaborating in a small, senior, high-autonomy engineering team.

🏝️ Benefits

• Competitive salary and comprehensive benefits package.

• Opportunities for professional growth and development.

• Flexible working hours and remote work options.

• Engaging and collaborative work environment.