Mobile App Developer (Xamarin)

Barcelona Senior

In this project you will be working for one of our pharmaceutical customers and join a multidisciplinary team charged with the development and optimization of an application which gathers data and helps diabetical patients with its treatment routine.

About the position


  • Define software requirements, user stories and tasks in collaboration with product owners and software architects.
  • Design and implement software for mobile applications.
  • Implement and execute unit tests.
  • Document software (code, detailed design and requirements specification on a needed basis).
  • Collaborate closely with test engineers to support integration testing of applications and interfaces.
  • Participate in Scrum and other agile processes as a developer.
  • Participate in design reviews.
  • Ensure high quality software and compliance to internal processes and guidelines.


Must have:

  • Professional experience in Mobile App Development (Minimum of 3 years).
  • Proficient experience with the following frameworks, tools and programming languages (C#, Xamarin, Azure DevOps 2019 / TFS 2018 and GIT).
  • Good understanding of mobile app architectures (e.g. MVVM), algorithms and general software design patterns.

Nice to have:

  • Experience in medical technology or other regulated industries.
  • Understanding of cyber security related to mobile applications.
  • Hands-on experience with Bluetooth / BLE.
  • Working knowledge of the following technologies & tools (Kotlin / Android Studio, Swift / XCode, Jenkins and Coco).


  • Permanent contract.
  • Full Home Office on Covid and at least 3 days/week after.
  • Home Office monthly expenses compensation + extend working set up (ergonomic chair, 2 screens…).
  • Self-managed flexible working hours 40h/week +/- 10%.
  • Friday intensive shift.
  • Private medical insurance for you and a competitive flat rate price for your relatives.
  • 100% salary coverage for sick leave.
  • Free language courses: English, Spanish and German.
  • Gym funding.
  • Transportation bonus for non-Barcelona/Madrid city working locations.
  • Re-allocation funding from 1.000€ to 2.000€ depending on the source country.
  • Flexible payroll.
  • Candidates referral program bonus from 1.000€ to 3.000€ depending on the candidate seniority level.
  • Business opportunity referral program bonus from 500€ to 5.000€ depending on the opportunity size and customer.
  • Learning Paths and Technical Coaches in our main Expertise Areas: DevOps, Agile, QA, Cloud, AI, Data, Software Development.
  • Paid certifications in our Expertise Areas: DevOps, Agile, QA, Cloud, AI, Data, Software Development.
  • Rewarded certifications from 200€ to 1.400€ per certification depending on the certification subject and level, in addition to the paid exam.
  • On-line and on-demand paid trainings in platforms such as Pluralsight or Udemy on our Expertise Areas.
  • Events paid under request for topics related to our Learning Paths.
  • Internal technical trainings done by our Subject Matter Experts.
  • Internal Soft-Skills trainings with external trainers as main part of our learning curriculum.

About the recruiter

Mayoral Mediavilla Eduardo (ERNI)

Email: [email protected]

Trust, Passion, Responsibility and Independence

About us

ERNI was founded in 1994 in Switzerland to develop innovative software for international companies and small to medium­sized enterprises. Today, the ERNI Group has more than 800 employees at 15 locations in 7 countries and continues to grow. Interested?

Sounds interesting?
Apply now!