Backend Developer

Barcelona Senior

You will be working with a cloud service used to exchange and store non-personal information from an app with the first level support.

It includes the next functionalities: receive encrypted and anonymous therapy data, receive data and settings, device monitoring and status information; send user notifications, firmware updates for the insulin delivery system to the app; provisioning data attestation, provisioning cybersecurity data (keys); it has a dashboard, where the 1st level support can query and consult the information and setup the notifications to send.

About the position


  • Definition of software requirements, user stories and tasks in collaboration with product owners and software architects.
  • Software design and implementation of mission-critical cloud applications and services.
  • Implementation and execution of unit tests.
  • Close collaboration with test engineers to support integration testing of applications and interfaces.
  • Participating in Scrum and other agile ceremonies as a developer.
  • Participating in design reviews.
  • Ensure high quality software and compliance to internal processes and guidelines.


Must have:

  • Deep knowledge of OOP (Object Oriented Programming), SOLID, programming patterns.
  • Minimum 3 years of experience with HTML/JS/ CSS.
  •  Minimum 5 years of experience working on .NET with Razor.
  • Experience as a back-end developer developing web applications, web APIs, REST APIs and micro services or distributed systems.
  • Experience working with SQL/non-SQL databases, such as SQL Server and Cosmos DB.
  • Experience working with unit testing, integration testing and component testing.
  • Experience with front-end development with MVC-4/Core MVC + Razor/Blazor expertise.

Nice to have:

  • Experience working with Cloud environments like Azure or AWS.
  • Experience with CI/CD and Terraform.
  • Experience with UX and Application Design (UI-RE, Graph Design, UX Design, Frontend structure and concept).


  • Permanent contract.
  • Full Home Office on Covid an 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 race price for your relatives.
  • 100% salary coverage for sick leave.
  • Free language courses: English, Spanish, 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, Al, Data, Software Development.
  • Paid certifications in our Expertise Areas: DevOps, Agile, QA, Cloud, Al, Data, Software Development.
  • Rewarded certifications from 200€ to 1.400€ per certification depending on the certification subject 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

Arjona Luis Alberto

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!