Senior Software Engineer (Full Stack)

MCS Group | Your Specialist Recruitment Consultancy; Dublin; On-site; EUR 72,000 - 88,000; Full time

Job summary

MCS Group is supporting an established business across the UK and Ireland to hire a Senior Software Engineer who will own the core software platform. The role suits hands-on developers who enjoy solving technical problems and influencing product evolution.

You'll work with a modern TypeScript stack (Node.js/NestJS backend, React admin portal, Next.js customer site) on AWS. Initially, you will collaborate with an external partner to bring development capability in-house and help establish

Qualifications

• 5+ years' relevant software development experience
• Strong TypeScript, Node.js/NestJS and React/Next.js skills
• Experience with AWS and infrastructure as code (AWS CDK)
• Strong MySQL knowledge incl. schema design and performance
• Experience integrating third-party APIs and payments/identity services
• Experience with automated testing, CI/CD and security practices
• Hands-on AI-assisted development workflows (Claude Code) and testing
• Ability to work independently and communicate clearly with both technical and non-technical colleagues

Responsibilities

• Developing new features across backend services and frontend applications
• Maintaining APIs, MySQL databases and third-party integrations
• Improving performance, accessibility, reliability, and customer experience
• Supporting real-time functionality and content delivery
• Collaborating with partner to transfer knowledge and build internal ownership
• Contributing to CI/CD pipelines and AWS infrastructure via code
• Monitoring production services with focus on security and maintainability
• Using AI-assisted development tools in planning, implementation, testing, review and docs
• Working with product and ops to understand requirements and deliver improvements

Skills

TypeScript

Node.js/NestJS

React/Next.js

AWS

Tools

AWS CDK

MySQL

TypeORM

CI/CD

Job description

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

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