Full Stack Web Developer

Here at Three, we’ve done things differently since day one.
We take the script and rip it up, we’re a big-hearted energetic bunch, striving for a better connected life. The energy of our people, the pace at which we operate, and the thrill of making bold moves is exhilarating and addictive. Magic happens when we power the connections that millions value, and you can feel it… When these things combine, phenomenal things happen. We encourage our employees to face their weaknesses, to really open themselves up to new tasks and projects in a supercharged and rich learning environment. We want you to become the best version of yourself.

Join us as a Full Stack Web Developer

Do you love to code and create impactful business solutions? Three Ireland’s Digital team is looking for a Senior Full Stack PHP Developer to help build, secure, and evolve our high-quality digital platforms using Laravel, AWS, and modern web technologies.

You will join a first-class, collaborative in-house team working across customer-facing and internal applications in a rapidly growing, innovative environment. If you are a senior Laravel developer who thrives on autonomy, security-focused development, and delivering polished digital experiences, we would love to hear from you.

What else it involves:

• Develop, maintain, and improve customer-facing and internal Laravel applications with clean, secure, scalable, and testable code.
• Ensure applications remain up-to-date with the latest Laravel and dependency versions, performing necessary upgrades confidently and systematically.
• Write secure code aligned with industry standards and best practices, proactively addressing potential vulnerabilities.
• Maintain and improve unit testing coverage and CI/CD pipelines to ensure high code quality and stability.
• Collaborate closely with designers, product specialists, and business owners to translate requirements into dynamic, practical digital solutions.
• Lead technical decisions and architectural discussions, providing clear, maintainable solutions.
• Monitor and troubleshoot using CloudWatch logs, proactively addressing production issues.
• Work with external partners for secure, seamless integrations with high standards of security and performance.
• Participate in team workshops, tech talks, and brainstorming sessions to continuously improve how we build and deliver digital services.
• Advocate for strong UI/UX principles and performance optimization across all platforms.

The Skills we are looking for:

• 7+ years of professional PHP full stack development experience, with 5+ years using Laravel in production environments.
• Strong expertise in:
• Object-Oriented PHP and Laravel, including systematic upgrade processes.
• Writing secure code, understanding common vulnerabilities (OWASP) and how to mitigate them.
• PHPUnit or equivalent testing frameworks for robust automated testing.
• MySQL, database design, and performance optimization.
• JavaScript (ES6+), jQuery, JSON, Vue.js (or similar), webpack.
• Building and consuming RESTful APIs within service-oriented architectures (SOA).
• CSS and SASS/SCSS for modern, maintainable frontends.
• Docker, containers, and CI/CD pipelines.
• AWS services: EC2, ECS/EKS, S3, CloudWatch and Linux (LAMP stack).
• Git/GitHub, including GitHub security and code review workflows.
• Comfortable working independently, managing priorities, and delivering solutions without close supervision while communicating effectively within a team and JIRA or similar project management tools.

Nice to have:

• Kubernetes experience in production.
• Advanced caching strategies for perfomance.
• Familiarity with headless CMS or API-first architectures.
• Hands-on experience with automated security scans and dependency vulnerability management.

Benefits of Working at Three

• Flexible working with our new Hybrid model, our employees will enjoy more flexibility working from home and our office locations (3 days per week office based). Please see job description for the office location of this role.
• Competitive salary, annual performance bonus & pension contribution
• 25 days holidays plus 2.5 company days
• Annual Leave buy or sell (buy or sell up to 5 days AL each year)
• Healthcare Insurance through our flexible benefits programme
• Life assurance, phone & laptop, subsidized canteen
• Access to learning & development tools such as LinkedIn Learning
• Free on-site parking

You may think you know us, but we’re full of surprises. Intrigued? Join us and Be Phenomenal. #Jobs Apply now at: https://www.three.ie/careers

Three Ireland is proud to be an equal opportunities employer. If you do not ‘tick every box’ in the job description above, there are likely other valuable attributes and skills you have that would make you a great fit for the team. If you feel this role is for you, then please apply! We are committed to equal employment and growing a diverse workforce.
We embrace those of any race, gender identity, sexual orientation, age, religion, disability, marital status, family status, civil status or membership of the traveler community, and we want our teams to reflect this!

If you require reasonable adjustments at interview, please let us know when scheduling your interview, or alternatively please email recruitment.support@three.ie