Senior Software Engineer (Full Stack)

MCS Group is proud to be supporting an established business operating across the UK and Ireland in hiring a Senior Software Engineer to help take ownership of its core software platform.

This role would suit someone who enjoys hands on development, solving technical problems and having a meaningful say in how a product evolves. You'll work across a modern TypeScript stack, including a Node.js/NestJS backend, React administrative portal and Next.js customer-facing website, hosted on AWS.

You'll initially work closely with an external development partner, building your understanding of the platform and helping bring development capability in-house. Alongside delivering features and improvements, you'll help establish the processes and engineering practices that support its ongoing development.

(Dublin - 5 days on-site)

What you'll be doing:

• Developing new features, enhancements and bug fixes across backend services and frontend applications
• Maintaining APIs, MySQL databases and third-party integrations, including payments and identity verification services
• Improving application performance, accessibility, reliability and the customer experience
• Supporting real-time functionality, search capabilities and efficient content delivery
• Working with the existing development partner to support knowledge transfer and build internal ownership
• Contributing to automated testing, CI/CD pipelines and AWS infrastructure using infrastructure as code
• Monitoring and troubleshooting production services, with a strong focus on security and maintainability
• Using AI-assisted development tools across planning, implementation, testing, code review and documentation
• Working closely with product and operational teams to understand requirements and deliver practical improvements

What you'll bring:

• 5+ years' relevant software development experience, with strong TypeScript, Node.js/NestJS and React/Next.js skills
• Practical experience developing and supporting production applications on AWS, alongside infrastructure as code using AWS CDK
• Strong MySQL knowledge, including schema design, indexing, performance optimisation and TypeORM migrations
• Experience integrating third-party APIs, webhooks and payment or identity verification services
• A strong approach to automated testing, CI/CD and application security
• Hands-on experience using AI-assisted development workflows, ideally including Claude Code, with clear testing and review practices
• The confidence to work independently, investigate issues and communicate clearly with technical and non-technical colleagues
• Kindly note Stamp 4 or EU Citizenship required.

Experience with real-time systems, Socket.IO, AWS AppSync, OpenSearch or Next.js SEO and performance optimisation would also be useful.

Why consider this role?

• Take ownership of software that supports day-to-day business operations and customer-facing services
• Work across a modern full stack TypeScript and AWS environment
• Help shape internal development practices as the business builds its engineering capability
• Combine hands-on development with broader responsibility for the platform's ongoing improvement

Salary: Up to 80k with comprehensive benefits package

To speak in absolute confidence about this opportunity, please apply with an up-to-date CV or contact Calum Omand at MCS Group.

If you require any reasonable adjustments or accommodations during the recruitment process, please let us know.

Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current and exclusive roles: www.mcsgroup.jobs