Senior Software Developer (Full Stack)

IT-Impulse is expanding to Bulgaria, with an office in Sofia, where we are building a local team of IT specialists. We represent a Software Engineering division of the international company JobImpulse GmbH with more than 9.000 employees in 51 locations in 12 countries and we act as an intermediary between the IT software development department and highly qualified IT specialists on the job market.
IT-Impulse with its offices in Seville (Spain) and Kosice (Slovakia) is the point of contact when it comes to IT Outsourcing and Nearshoring.

About the role:

We are seeking a Senior Full Stack Software Developer to design, develop, and maintain robust, secure, and scalable software solutions within a modern web application suite. The role involves working across the full technology stack—from database through to front-end—to deliver high-quality, accessible software aligned with established architectural and coding standards.

Key Responsibilities:

• Design, develop, and maintain full-stack web applications using .NET (C#) Web API, Angular (TypeScript), and SQL Server
• Hands-on experience with AI-driven development assistants E.G. Microsoft Copilot to accelerate coding and enhance development efficiency.
• Collaborate closely with architects, developers, and product teams
• When required act as technical lead for project SCRUM teams
• Ensure all deliverables conform to; accessibility (WCAG) and internal coding standards and are responsive by default
• Develop high performing code for front and back end
• Write unit, integration and automation tests as required by policy
• Lead on implementing cloud-native and serverless architectures
• Participate in code reviews and mentor other developers within the team
• Contribute to continuous integration, delivery, and automation initiatives
• Strong focus on code quality with a strong focus on delivering well tested functional code with good error logging
• Contribute to architecture and UI design to maintain and develop a library of reusable components and services
• Maintain and produce key technical documentation

Skills and Experience:

Required:

• Strong experience in .NET (C#) and Web API development (at least 5 years)
• Proficient in Angular (TypeScript) (at least 5 years)
• Strong database skills with SQL Server
• Experience of working with interoperability standards for web communications
• Understanding of accessibility and responsive design standards
• Experience deploying and managing native applications in Azure or AWS
• Strong focus on unit testing and automation frameworks
• Previous commercial experience working with signal R or a similar technology
• Exposure to secure development methodologies
• Understanding of system performance and monitoring

Desirable:

• Experience with CSLA framework
• Familiarity with ASP.NET MVC
• Exposure to mobile development (Ionic platform)
• Asset management experience or knowledge
• Experience with DevOps build pipelines

Key Relationships

• Reports to: Development Team Leader
• Works closely with: Product Owners, QA Engineers, DevOps Engineers

What you get:

• Long-term and stable position, an employment contract for an indefinite period
• Environment of a medium-sized company together with the background and opportunities of a large company
• +5 extra days of vacation
• Employee referral program (up to 3.000 EUR per referral)
• Yearly performance and salary review
• Food vouchers
• Jubilee gifts
• Flexible working hours
• Stocked kitchen with free drinks (freshly roasted coffee)