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App Developer, Internship

Internship 4 to 6 months

Odense (Denmark)

Relesys

SME

Published on 23 September 2026

  • Contract

    Internship 4 to 6 months

  • Location

    Odense (Denmark)

  • Start date

    As soon as possible

  • Salary

    Information not provided

  • Remote working

    Not specified

Join our 5x growth journey as our App Developer Intern and help bring our customers' apps to life

Relesys delivers a platform for employee communication, and every customer gets their own app in the App Store and Google Play. Today we have over 100 customer apps live, and new ones keep coming.

We are looking for a systematic and curious IT student who wants hands-on experience in a fast-growing B2B SaaS company. In this role, you will take ownership of building, releasing and maintaining our customer apps, working closely with our development team. You'll learn a well-documented workflow from day one, and there's plenty of room to improve and automate it along the way.

This internship is ideal for someone who wants real responsibility, practical experience with CI/CD and app store releases, and to see their work go live with real customers.

This is an exciting time to join Relesys. Through our strategic partnership with the Private Equity fund Copilot Capital, the coming years will bring significant growth and plenty of opportunities along the way. You'll have a unique chance to make a real impact, taking both your career and Relesys to the next level. As we like to say, joining a scale-up at this stage is a \"once in a lifetime\" opportunity!

Responsibilities
As an App Developer Intern, you will support our development team in building, releasing and maintaining our customer apps. Your responsibilities will include but are not limited to...
  • Create new customer apps based on tickets in our task system, including setting up app name, domain, colors and configuration, and preparing apps for signing
  • Build apps via our pipelines in Azure DevOps and fetch the finished builds
  • Release apps by uploading them to App Store Connect and Google Play Console, setting up store pages and submitting them for review
  • Follow up on rejections from Apple or Google and make the necessary changes
  • Maintain and update existing customer apps
  • Migrate older apps onto our current .NET platform
  • Identify repetitive tasks in the workflow and help improve or automate them
  • Keep track of your tasks by updating status, aligning with designers and account managers, and documenting your work


Who are you
  • Currently studying Computer Science, Software Development, IT Technology or similar
  • Systematic, structured and detail-oriented
  • Able to work independently, ask questions when something is unclear, and see a task all the way through
  • Curious about how software is built, tested and released
  • A willingness to adapt to new situations, as well as a proactive approach to problem-solving
  • You can work full-time during your internship
  • Impeccable English skills, both verbal and written GB
  • You are located in or near Odense as this internship is on-site DK

Furthermore, it would be great, but not required, if you have experience with:
  • .NET or C#
  • Azure DevOps or other CI/CD tools
  • Publishing an app in the App Store or Google Play
  • Git and a bit of Python
  • Automating repetitive tasks


What we offer
  • \"Once in a lifetime\" growth opportunity in an aspiring unicorn business that will 5x over the coming 4-5 years backed by the Private Equity fund, Copilot Capital
  • Positive, collaborative, and supportive colleagues who wish you to succeed
  • Opportunities for professional growth and development as we are growing towards becoming a unicorn business
  • Delicious lunch program
  • Team breakfast every Friday morning
  • Free barista coffee, tea, and beverages
  • Lots of challenges and opportunities, with respect and flexibility for your education
  • Targeted feedback and guidance from your mentor to further improve your skills


When do you start
  • Our Talent Programme is custom-tailored for your internship period. However, we are looking for an intern to start in February 2027
  • Apply for the position by sending your CV through the Apply button

We can't wait to hear from you!

Who are we
Relesys isn't just another SaaS company; we are a dynamic force revolutionizing communication and performance management platforms. Established in 2014, we set out on a mission to bridge the gap between HQ and non-desk workers, fostering a thriving workforce.

What value do we bring? People are the heartbeat of our client's business. When employees are thriving and successful, businesses flourish and retention rates increase. Relesys enables our clients to achieve this through an all-in-one app that streamlines communications, training, and daily operations into their own customized and ever-evolving app

With clients such as Salling Group, COOP, Carlsberg, and Vestas - to name just a few - Relesys serves clients in 15 different countries, supporting them in 40 languages with +500,000 licenses across 20,000 stores and users in +100 countries. We have a strong presence in the Nordics and EMEA, and we continue to increasingly attract clients from across the globe, as we are breaking into new, dynamic markets.

At Relesys, we're shaping the future for frontline workers across various industries: Retail, Hospitality, Production/Manufacturing, and Transportation - while having FUN, as our rule number one! Join us on this thrilling journey as we grow and venture into new horizons.

Our Culture
Building a world-class organization and culture is our highest priority. We believe in the talent of our people and in long-term collaborations where we value an informal yet highly professional culture. We always go 'the extra mile' for our colleagues and clients, but rule number one - Have fun! This rule is always at the forefront of our minds when we come to work, creating an environment that is filled with passion, energy, and inspiration. We are eager to see what exciting contributions you, as our new colleague, will bring, as we believe that each and every individual has a tremendous influence on the whole

Application deadline

As long as the job is online

Study level

Vocational, Under-bachelor, Short-cycle higher education level

Job Category

Programming