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Junior To Mid Php Developer

Posted on Jan. 27, 2026

  • Remote, Ireland
  • 0 - 0 USD (yearly)
  • Full Time

Junior To Mid Php Developer job opportunity

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Kelsius is the leading supplier of automation technology for product safety and compliance with the food services and healthcare industries. Using our world class wireless temperature monitoring technology, digital HACCP Management system and cloud-based data hosting and processing, Kelsius systems improve product safety, ensure regulatory compliance and optimise costs associated with these activities. Founded in 2003, Kelsius operates in Ireland and the UK and we export our products and services to over 50 countries across the globe. Our customers range from large supermarket chains, restaurants & hotels to pharmaceutical manufacturers, healthcare facilities, laboratories, foodservice companies and vaccination centres.

Kelsius is recruiting for the role of Junior to Mid PHP developer for a legacy web application to strengthen its R&D team. You will be responsible for enhancing and maintaining various applications (Client facing and internal web-based applications), to continue to grow our market base. This is an exciting opportunity, if you have an interest in IoT and want to get involved in a rapidly growing industry.

You will work alongside the Product Manager, the R&D team and the Testing team and be responsible for the full development life cycle of the app. Your ability to understand requirements and to convert them to efficient solutions makes you an ideal self-starter candidate. Your ability to work on multiple projects in a very agile environment will set you apart.

Our application is built with core PHP (no full-stack frameworks), so a strong understanding of vanilla PHP and custom architecture is essential and includes:

Main Responsibilities:

  • Develop new software features, and maintain existing software: debug and fix issues in an existing PHP codebase
  • Make small/medium changes safely in legacy code
  • Write and maintain raw SQL queries
  • Minor JavaScript for simple UI behaviour

The successful candidate will:

  • Have good experience with PHP and MySQL. 1-5 years’ experience.
  • Plain PHP fundamentals (comfortable without a framework)
  • Strong debugging skills
  • Web Fundamentals
  • Practical web security knowledge
  • Familiarity with RESTful APIs and integrating third-party services.
  • Ability to write clean, maintainable, and testable code.
  • Demonstrate initiative, be a self-starter, show willingness to learn.
  • Have strong organizational skills and demonstrate a good attention to detail.
  • Have good interpersonal skills and be a team player.
  • Have some experience using Git (Git Basics)
  • Have the ability to work in a fast-paced development environment and to commit to deadlines

This is a remote working role with occasional visits to our head office in Gweedore/Falcarragh, Co. Donegal. Candidates must reside in Ireland and have the right to work in Ireland.

At Kelsius we are an equal opportunity employer. We attract and retain the best qualified individuals available, without regard to race/ethnicity, religion, gender, sexual orientation, age or disability.

Job Types: Full-time, Permanent

Pay: €35,000.00-€40,000.00 per year

Benefits:

  • Bike to work scheme
  • Company events
  • Sick pay
  • Work from home

Application question(s):

  • Kelsius is only able to hire individuals who are legally able to work in Ireland &/or the UK. We are not currently looking to sponsor candidates for this role. Are you currently able to work legally and full time in Ireland and/or the UK?
  • This positions requires fluency in English (reading, writing & speaking). Are you fluent in English?
  • This position requires the candidate live and work full time in Ireland &/or the UK. Are you located in Ireland and/or UK?

Experience:

  • PHP Development: 3 years (preferred)

Work Location: Remote


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