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 manage asynchronous background processing services (a .NET worker) for workflows that involve extensive document handling, coordinated through message queues.

• Develop and sustain multiple Next.js/React applications catering to diverse user groups (internal operations/back-office tools and external/customer-facing portals), utilizing a shared package layer.

• Construct relational data models and implement efficient data access code (EF Core / PostgreSQL).

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

• Implement authentication and authorization mechanisms across various identity domains (workforce versus external/customer identity).

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

• Engage in architectural decisions that ensure a growing monolith remains modular, maintainable, and thoroughly tested (including unit, integration, contract, and architecture tests).

• Operate within a human-in-the-loop product model: develop tools that enable operators to review, amend, and validate AI-assisted extraction results, with complete traceability of data changes from raw intake to final approval.

• Write and uphold automated tests throughout the stack and contribute to CI/CD pipeline maintenance.

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

⛳️ Requirements

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

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

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

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

• Solid skills in TypeScript and familiarity with working in a monorepo containing shared, versioned internal packages.

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

• Experience 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 for both back end and front end.

• Comfortable working across the entire stack without hand-offs — from database schema to API to user interface.

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

🏝️ Benefits

• Competitive salary and performance-based bonuses.

• Comprehensive health, dental, and vision insurance.

• Flexible work hours and remote work options.

• Opportunities for professional development and continuous learning.

• Supportive work environment that values innovation and collaboration.