Senior Fullstack Developer

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

📋 Description

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

• Construct and support asynchronous background processing services (a .NET worker) tailored for document-intensive workflows, managed through message queues.

• Design and maintain a variety of Next.js/React applications catering to different user groups (internal operations/back-office tools and external/customer-facing platforms), utilizing a unified package layer.

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

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

• Establish authentication and authorization protocols across various identity boundaries (distinguishing between workforce and external/customer identities).

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

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

• Operate within a human-in-the-loop product model: develop tools enabling operators to review, correct, and approve AI-assisted extraction outcomes, ensuring full traceability from raw intake to final approval.

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

• Participate in code reviews, technical design discussions, and provide mentorship to 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 developing 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 the separation of concerns in complex back-end systems.

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

• Proficient in TypeScript and comfortable working within a monorepo that includes shared, versioned internal packages.

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

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

• Strong commitment to automated testing, including unit, integration, and contract testing for both back end and front end.

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

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

🏝️ Benefits

• Competitive salary and performance-related bonuses.

• Flexible working hours and remote work options.

• Comprehensive health and wellness benefits.

• Opportunities for professional development and continuous learning.

• Inclusive and collaborative work environment.