Senior Full Stack Developer (.NET and React)

About Us Since 2008, Flat Rock Technology has provided a wide range of innovative and complex solutions for companies of all sizes and has grown into a reliable partner. Our company operates from several locations – London, Varna, Ruse, Burgas, Tbilisi, San Jose (Costa Rica) and provides software, cloud and outsourcing services.

With more than 400 highly skilled specialists in our team, we are able to cover all phases of a solution lifecycle – from research, through implementation, to support and allow organisations to create a more cost-effective structure while focusing on their core activities.

As we continue to grow, we are seeking a Senior Full Stack .NET Developer with React to lead complex projects, mentor team members, and contribute to the development of cutting-edge software solutions.

Main responsibilities:

• Design, develop, and maintain scalable and secure web applications using .NET, React, and related technologies
• Take ownership of the entire development lifecycle, including architecture design, coding, testing, deployment, and support
• Collaborate closely with cross-functional teams, including Product Managers, Designers, and QA Engineers, to deliver high-quality software solutions
• Lead code reviews, ensuring best practices in coding standards, security, and performance
• Provide mentorship and technical guidance to junior and mid-level developers
• Stay updated with emerging technologies and recommend improvements to enhance the technology stack
• Troubleshoot and resolve complex technical issues to ensure smooth operation of applications
• Proficient in leveraging AI tools and platforms to support and enhance daily tasks and operational workflows

Requirements:

• 5+ years of experience in full-stack development with a strong focus on .NET technologies and React
• Expertise in C#, ASP.NET Core, EF Core, and RESTful API development
• Proficiency in modern front-end technologies, including React, JavaScript/TypeScript, HTML5, CSS3 and responsive design best practices
• Solid experience with MS SQL Server or other relational databases
• Familiarity with CI/CD pipelines, version control systems (e.g., Git), and Agile methodologies
• Strong problem-solving skills and the ability to work independently on complex tasks
• Excellent communication skills with the ability to explain technical concepts to non-technical stakeholders
• A degree in Computer Science, Software Engineering, or a related field (or equivalent experience)
• Experience with Cloud platforms such as Azure or AWS
• Knowledge of SignalR, Microservices architecture, Containerization (Docker, Kubernetes)
• Experience with additional frameworks like VueJS, Angular, or mobile development frameworks like .NET MAUI
• Strong understanding of DevOps practices and tools

What we offer in return:

• Competitive salaries based on performance reviews with additional benefits
• 24 days of holiday which further increase with the time spent in the company
• Office working hours on schedule
• Opportunities for professional growth and career development
• Dynamic work environment in young team
• Additional health insurance package
• Birthday vouchers
• Opportunity for sport card
• Fresh fruits and beverages in the office
• Modern offices around the world
• Entertainment spaces, teambuilding events, parties, and participation in different events

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If that sounds just like you, apply now by sending your CV in English!

By submitting your application, you agree that FRT will use your personal data for recruitment purposes only. All documents will be treated in the strictest confidentiality.

Only short-listed candidates will be invited for an interview.

We can’t wait to meet you!