Senior Developer; Python and React

MCS Group delighted to be working with an innovative and rapidly growing technology organisation as they look to appoint a Senior Software Developer to join their expanding engineering team in Belfast.

This is an excellent opportunity for an experienced engineer who enjoys working across complex systems, influencing technical direction, and building scalable software solutions within a modern, collaborative development environment.

The successful candidate will play a key role in architecture, solution design, and hands‑on development across both backend and frontend technologies, helping deliver robust, high‑performing platforms used across a large operational environment.

• Lead the design and delivery of scalable software solutions from concept through to deployment
• Contribute to architecture decisions and technical strategy across multiple systems
• Develop backend services primarily using Python, alongside Go for performance‑focused services
• Build modern frontend applications using React, JavaScript, and Type Script
• Design and integrate RESTful APIs and authentication flows
• Work within cloud‑hosted environments across Azure and AWS
• Collaborate closely with engineering teams and wider business stakeholders
• Mentor and support other developers within the team

You’ll be working across a modern engineering stack including:

• Backend:
  Python, Go
• Frontend:
  React, JavaScript, Type Script
• REST APIs & OAuth
• Postgre
  
  SQL & MySQL
• Azure & AWS Cloud Platforms.

• Strong full‑stack development background
• Strong understanding of scalable architecture and software design principles
• Experience building APIs and cloud‑based systems
• Strong frontend development experience with React and Type Script
• Excellent communication and stakeholder engagement skills
• Previous experience mentoring or supporting developers is advantageous

• Competitive salary and comprehensive benefits package
• Hybrid working model
• Opportunity to work with modern technologies and cloud platforms
• Strong career progression opportunities
• Collaborative engineering culture with real technical ownership
• Exposure to large‑scale and impactful software projects

MCS Group is committed to Equality, Diversity, and Inclusion for all, being the first recruitment agency in NI to achieve Bronze Diversity Mark accreditation, if you have a disability which means you require a reasonable adjustment to be considered at any stage of the recruitment process, please contact us and we will endeavour to facilitate the request.