DOOR3

We are looking for a highly skilled Full Stack Engineer with deep experience in .NET and React, The ideal candidate combines strong technical capabilities with a pragmatic approach to software design and delivery, the ability to communicate effectively with both technical and non-technical stakeholders. Experience or interest in AI tools and modern ML-based solutions is a strong plus.
 

Essential Job Duties:

• Develop and maintain backend services using .NET, with occasional work on Node.js-based components.
• Design and build modern SPAs using React and TypeScript with a focus on reusability and performance.
• Collaborate cross-functionally with designers, product managers, and other engineers to deliver high-impact features.
• Participate in architectural decisions, code reviews, and mentorship of mid- and junior-level developers.
• Build and integrate scalable APIs and third-party services (e.g., Stripe, OpenAPI-based clients).
• Ensure the codebase adheres to best practices including SOLID principles, clean code, and scalable architecture.
• Participate in agile development processes, including sprint planning, retrospectives, and standups.
• Troubleshoot complex issues across the stack, from the browser to backend services and infrastructure.
• Contribute to infrastructure decisions including CI/CD, containerization, and deployment in AWS/Kubernetes environments.
• Experience in end-to-end feature life cycle ownership from product requirements to architecture and design to development and testing.
• Optionally support or experiment with integrating AI-based tools into engineering workflows or product functionality.

Required Skills & Experience:

• Experience integrating payment systems, like Stripe or other payment processing platforms.
• Exposure to OpenAPI/Swagger for client/server code generation.
• Experience in .NET Core APIs or transitioning between monolith and microservices architectures.
• Familiarity with AI/ML concepts, tools, and frameworks (e.g., LangChain, Hugging Face, OpenAI API).
• Prior work on eCommerce, enterprise, or high-load data-intensive applications.
• Experience with event-driven systems (e.g., RabbitMQ, Kafka).
• Familiarity with GraphQL or other modern API paradigms.

Personality profile and soft skills

• Excellent communication skills – able to translate technical solutions to non-technical stakeholders.
• Strong collaboration and mentoring mindset – enjoys working with others and sharing knowledge.
• Curious and proactive learner, especially around new tech and architectural patterns.
• Pragmatic problem-solver who prioritizes delivery and business impact over technical complexity.
• Comfortable working in remote/distributed teams and agile environments.
• English proficiency: Intermediate (B1+) or higher across all four skills.

Working Arrangement: European time zone, 40-hour work week, engaged via a contractor's agreement.

DOOR3 is seeking Senior React/SharePoint Engineers to contribute to the development of enterprise-grade SharePoint intranet solutions. You will work on building custom site experiences, dynamic webparts, and integrating third-party services into scalable digital workplaces based on SharePoint and a specialized customization layer on top of it.

Location: remote from Europe.

Allocation: could be full-time or part-time, depending on your availability.

Essential Job Duties:

• Work directly on a Web application development team to produce best in class production using Front-End Technologies
• Develop within MVC frameworks such as ReactJS
• Administration of SharePoint sites
• Drive key strategic ideas regarding page performance
• Working directly with our UX designers, back-end developers and clients to implement cutting-edge experiences across a variety of presentation technologies.
• Working flexibly in an Agile development environment: must be able to keep pace with the development team and adapt to changing requirements

Required Skills and Experiences:

• Expert working knowledge of HTML and CSS, including preprocessors like SASS
• Expert knowledge of ReactJS and TypeScript
• Experience with Javascript Task Runners (Gulp)
• Experience with SharePoint framework (SPFx)
• Experience with Fluent UI
• Should be well versed with code optimization techniques
• Excellent written and verbal communication skills

Preferred Qualifications:

• Experience working with JS frameworks like VueJS, Handlebars
• Experience working with PnP JS
• Experience leading a team or mentoring
• Passion for writing clean, efficient code
• Ability to manage changing priorities, solve unfamiliar problems, and meet deadlines

You Are

• A problem-solver who thrives in collaborative and evolving environments
• Comfortable working independently or as part of a distributed team, mentoring other engineers
• Able to communicate effectively with technical and non-technical stakeholders
• Passionate about clean, maintainable, and well-documented code
• At least Intermediate/B2 English across all four skills

Join DOOR3 to help us build elegant, extensible digital workplaces that transform how teams connect and collaborate. If you're excited to deliver high-quality SharePoint solutions using cutting-edge tools, we want to hear from you.