Fretello GmbH

Fretello GmbH

Backend Developer (Node.js, Postgres, AWS)

€44,000-€50,000 / YEAR

We are looking for a passionate Backend Developer to join our cross-functional product team. Your instruments of choice are APIs, microservices, databases, as well as the cloud and you enjoy the melody created when you play them all together.

As our Backend Developer, you’ll be responsible for managing the interchange of data between the server and the users. Your primary focus will be the development of all server-side logic, definition, and maintenance of the central database, and ensuring high performance and responsiveness to requests from the frontend. As if this wasn’t enough, you will also be responsible for integrating the frontend elements built by your coworkers into the application.

Your playground:

  • Building and improving backend API and micro-services around various aspects of learning an instrument
  • Designing fault-tolerant architecture on AWS to provide an optimal experience to our users
  • Ensuring our backend applications are up and running and fix any errors that arise in a timely manner
  • Writing code that is easy to read, maintain, test, and follows proven practices
  • Working in a cross-functional team, helping to actively shape our product’s future

What to bring along:

  • At least 3 years of practical experience developing backend applications
  • Excellent command of Node.js and plus points for knowledge of React
  • Working knowledge of AWS services
  • Good grasp of Postgres, database triggers, and indexes
  • Experience in the design and implementation of REST APIs (using Node.js and Express)
  • Working knowledge of Docker containers and microservices
  • Experience with continuous integration and delivery as well as test-driven development
  • Proactive self-starter with a positive mindset, a desire to learn, and a strong sense of ownership

Our tech stack:

  • Frontend, Backend & DB: React, Node.js, Express, Postgres, Strapi
  • Mobile Languages: Kotlin, Swift, C++
  • DevOps: Bitbucket Pipelines, Docker
  • IDEs: Android Studio, Xcode
  • Cloud: AWS Cloud: CloudWatch, Cloudfront, EC2, RDS, Beanstalk, Lambda, SQS, SNS, S3
  • Design: Figma
  • Testing: XCTest/XCUITest, Espresso, MockK,
  • Machine Learning: Python, Tensorflow, Keras, powerful on-premise hardware

What we offer:

  • Personal time off (25 days paid leave per year)
  • Flexible working hours (core hours 10:00 to 14:00)
  • 38.5 hour work-week (overtime compensated as time-off 1:1)
  • Remote first work setup and mindset
  • A small team (25-30) with lots of individual impact and responsibility
  • Fun, relaxed, and regular remote team events and onsite team retreats
  • Shared and lived values: Agility, Curiosity, Unity, Transparency, and Empathy
  • An emphasis on continuous learning and growth
  • Mental wellbeing initiatives such as weekly yoga, Mindfulness Wednesdays, and optional paid external therapy sessions

Your contact: Stephanie Süllwald (Talent Scout)

Our salary range starts at an annual compensation of EUR 44.000 to a maximum of EUR 50.000 if you tick all of the boxes. Your actual offer will depend on your skills and experience.

Time zone preference: +/- 5 hours of difference from CET.

About Fretello GmbH

With our AI-based guitar learning app Fretello, we empower people to express themselves through music. This experience can look different for every user as our learning content is customizable and adapted to the experience level. Our app not only allows our users to learn, practice, and play the guitar, Fretello provides real-time feedback and enables our users to follow a learn path, choose customizable practice sessions, or learn how to play their favorite songs to perform them in front of their friends and family or even on a big stage. Founded in 2016 by Florian Lettner and Wolfgang Damm, we have ever since grown into a warm-hearted and passionate bunch of 25+ people. Not only do we strive for simplicity and iterative improvements when it comes to our app but also in the way we are working together. Our team collaborates remotely from all corners of the world or on-site in our office facilities in Linz to offer the best possible music learning experience to our users. In addition to being passionate about our product, we Fretellians value transparency, flexibility, curiosity, ownership, and foster an appreciative team environment where we support and push each other. If you identify with our values and passion and want to join the Fretello stage, we’d be thrilled to learn what makes you a good fit for our diverse team. Have a look at our open positions at to learn more about us and to send us your job-relevant application documents. The Stage is (Y)Ours!