Senior Fullstack Developer

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

📋 Description

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

• Create and manage asynchronous background processing services (a .NET worker) for document-intensive workflows, coordinated through message queues.

• Develop and sustain several Next.js/React applications that serve internal operations/back-office tools as well as external/customer-facing portals, utilizing a shared package layer.

• Design relational data models and craft efficient data access code utilizing EF Core/PostgreSQL.

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

• Implement authentication and authorization mechanisms across workforce and external/customer identity boundaries.

• Collaborate on API contracts and shared TypeScript types used by front-end applications.

• Engage in architectural decisions that promote a modular, maintainable, and well-tested monolith.

• Develop human-in-the-loop tools for operators to review, amend, and approve AI-assisted extraction results with complete traceability.

• Write and maintain automated tests throughout the stack and contribute to the health of the CI/CD pipeline.

• Participate in code reviews and technical design discussions; mentor less experienced engineers.

⛳️ Requirements

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

• At least 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 in relational databases and ORMs (EF Core or equivalent), including migrations and query performance optimization.

• Solid TypeScript proficiency and comfort in working within a monorepo that contains shared, versioned internal packages.

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

• Experience with 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 the backend and frontend.

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

• Excellent communication abilities and experience working in a small, senior, high-autonomy engineering team.

🏝️ Benefits

• Competitive salary and performance-based bonuses.

• Flexible work hours and options for remote work.

• Comprehensive health benefits including medical, dental, and vision coverage.

• Opportunities for professional development and continuous learning.

• Supportive team environment with a focus on work-life balance.