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Mid-Level Software Developer

Job in Belfast, County Antrim, BT1, Northern Ireland, UK
Listing for: ACTIVATE GROUP LIMITED
Full Time, Contract position
Listed on 2026-02-18
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer, C# / Unity Developer, Backend Developer
Job Description & How to Apply Below

Mid-Level Software Developer
Location:
Remote

Department: IT
Contract type:
Permanent / Full-time

About the role

We’re looking for a Mid-Level Software Developer to join our IT team, and play a key role in being responsible for designing, developing, and maintaining web applications and services using C# .NET, Angular and Blazor frameworks. The developer will collaborate closely with product managers, UX/UI Designers, and the rest of the development team to build scalable, secure, and user-friendly web applications.

This role includes both front end and back-end functionality, integrating with APIs and optimising performance across the application

Key objectives include:

  • Delivering efficient and maintainable code
  • Designing and developing web-based applications using Angular, Blazor and .NET
  • Ensuring seamless integration with databases, APIs, and other services
  • Collaborating with the team to ensure high-quality, consistent, scalable solutions

Activate Group is a growing UK business with 1,000+ team members nationwide. This is an exciting opportunity to build a long-term career with a company that values its people and offers genuine development and progression opportunities.

Key responsibilities

  • Application Development
    :
    Design, develop, and maintain web applications using C#, .NET Core/Framework, and Blazor.
  • Front-end Development
    :
    Build dynamic user interfaces with Angular 15, Type Script 4.9, RxJS, Angular Material / Prime

    NG, Blazor and Signal

    R, ensuring responsiveness, accessibility, and a seamless user experience.
  • Back-end Development
    :
    Develop server-side logic, services, and APIs using .NET, ensuring high performance and responsiveness of applications.
  • Database Integration
    :
    Implement and maintain database solutions using MySQL, SQL Server, Mongo

    DB and Entity Framework as well as using Stored Procedures where required. Some Query optimization, data modelling, and performance tuning would be desirable
  • API Development and Integration
    :
    Create and consume RESTful APIs and integrate third-party services.
  • Code Reviews and Best Practices
    :
    Participate in peer code reviews to ensure high code quality, performance, and adherence to best practices and coding standards.
  • Testing and Debugging
    :
    Write unit and integration tests to ensure the reliability of applications. Identify and fix bugs to maintain a stable codebase.
  • Documentation
    :
    Produce clear and concise technical documentation for development processes, APIs, and system architecture.
  • Collaboration
    :
    Work with cross-functional teams including designers, product managers, and QA to deliver high-quality solutions in an Agile environment.
  • Continuous Improvement
    :
    Stay updated with the latest developments in Angular, .NET and Blazor, proposing and implementing improvements to the codebase and development process.

Skills and experience

  • Proficiency in C# and .NET
    : 3+ years of hands-on experience in software development with proficiency in C# and .NET:
    Strong experience in developing applications using C#, with in-depth knowledge of .NET Core and .NET Framework.
  • Angular & Blazor
    :
    Solid experience in building web applications using Angular 15 and Blazor, experience of component libraries such as Mud Blazor.
  • Front-end Technologies
    :
    Familiarity with HTML5, CSS3, and JavaScript frameworks, with a good understanding of responsive design principles.
  • Database Skills
    :
    Experience working with relational databases using Entity Framework and experience with databases such as MySQL, SQL Server and Mongo

    DB, including database design, query optimization, and stored procedures.
  • API Development
    :
    Experience in creating and consuming RESTful APIs, along with working knowledge of protocols like JSON and XML.
  • Version Control
    :
    Proficiency in Git for version control, including branching, merging, and pull requests.
  • Problem-Solving and Debugging
    :
    Strong problem-solving skills and ability to debug and troubleshoot across various layers of the application stack.

Desirable (but not essential):

  • CI/CD
    :
    Experience with continuous integration and delivery pipelines, automating build, test, and deployment processes.
  • Security Best Practices
    :
    Understanding of secure coding practices, authentication, and…
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