Graduate Software Engineer Developer (Belfast) SpringSummer 2026

Calnex Solutions is a fast-growing world renowned innovative company that develops leading edge products for testing network equipment and network application performance.

Our Engineers work in multi-discipline product development teams that include software and hardware design and system test Engineers. The teams work closely with marketing and sales turning market and customer requirements into high quality fully functional products.

We have exciting opportunities for graduates to join our development team as part of our Graduate intake for Spring/Summer 2026. Working on real product feature development and mentored by experienced Engineers this is an excellent opportunity to launch your career working as part of and learning from a world class development team who are creating leading edge products.

Key Responsibilities:

• Developing and delivering quality software to timescales based on an outline of the implementation
• Contributing to the architectural development and evolution of the software to keep it flexible and maintainable as market requirements evolve
• Support quality-oriented activities necessary to deliver a product that will delight our customers
• Learn the domain and hence appreciate the real-life use cases of the product features

Essential Skills and Qualifications:

• Educated to Degree level in Computer Science or an equivalent subject
• Grasp of OO design techniques
• Application software development using some of: C#/.NET C Python
• Experience of web development using any of Javascript Angular CSS React and HTML would be beneficial
• Ability to work closely with others in a multi-discipline team
• Ability to respond to tight deadlines in a dynamic environment

Calnex strives to develop its employees through a mixture of work experience and training to provide career advancement.

Calnex rewards success and the salaries of our Graduates are reviewed twice a year. We have an open and supportive culture and being a smaller Company our Graduates can quickly get a broad understanding of all aspects of the business. Calnex rewards success and offers competitive salaries. Our comprehensive benefits package includes a contributory pension plan flexible holidays life assurance critical illness cover private healthcare performance bonus and an opportunity to join the Calnex Employee Share Incentive Plan.

A critical element of Calnexs ethos is to be a company that people enjoy working for and with. Personality fit and a positive attitude to both fellow employees and all other people that may be encountered while the individual represents Calnex will be a key attribute of the successful candidate.

Take a look at ourwebsiteto find out more about what we do and what its like to be an employee at Calnex!

This role does not meet the minimum salary threshold for Skilled Worker visa sponsorship. Applicants must have the ongoing unrestricted right to live and work in the UK meaning you do not need sponsorship now or in the future and your right to work is not time-limited.

Calnex are an Equal Opportunity Employer.

In consideration of the General Data Protection Regulation (GDPR) please be aware that by applying for a role in Calnex Solutions directly or via an intermediary you are giving permission for us to retain certain personal information for a period of up to two years. That information includes your CV cover letter or any other correspondence relating to your application and any notes we may take at interview.