Senior Frontend Engineer – React (f/m/d)

Job description

Do you have a drive to be part of creating the future of mobility? At ioki, we aim to create mobility solutions that complement public transportation, including demand responsive transportation services, mobility analytics, and autonomous driving.

We blend innovative and conventional approaches to bring people together.
With the benefits of a large corporation and the nimbleness of a startup, ioki is truly unique.
Are you excited by the progress being made in the mobility sector and eager to contribute to it within a highly agile software development team using best practices and cutting-edge tools? Then let’s connect!

For our office in Frankfurt am Main we are looking for you as a (Senior) Frontend Engineer (f/m/d).

Your tasks

  • You are part of an interdisciplinary, self-sufficient product team developing an innovative web application for the mobility market of tomorrow 
  • You work closely with your team to deliver the best possible product for our customers 
  • You discuss, plan, implement and test features - from interactive reporting to complex map components 
  • You continuously deliver new features into production and make sure nothing goes wrong there 
  • Together with your team, you make technical decisions regarding architecture and implementation details 
  • You maintain and improve software development standards, tools and processes 

Job requirements

  • You enjoy and have experience in the creation, maintenance and further development of complex web applications 
  • You have in-depth knowledge of programming languages such as JavaScript/TypeScript 
  • You have experience with client-side frameworks like React and Next.JS and common testing frameworks like Jest, Playwright or Cypress 
  • A degree in the STEM field (mathematics, computer science, engineering, and technology), a comparable professional qualification or proven track of experience
  • You write high-quality, well-tested code and want to develop a maintainable, stable, and tested system
  • You have a product-focused mindset and enjoy experimenting to find innovative solutions for specific customer needs 
  • You are a communicative team player who is comfortable in an agile work environment and enjoys sharing your knowledge with others 
  • You take responsibility for your work and build sustainable solutions that last for the long term 
  • You are fluent in English 


  • Experience with the development of map-based applications and map libraries such as Mapbox GLJS, Leaflet JS or here Maps for JavaScript 
  • Experience in the field of (public) transport or new mobility 
  • Experience with creating and maintaining CI/CD pipelines and common tools such as GitLab CI, Docker or Kubernetes 


  • Agile Framework: Scrum
  • Framework: NextJS
  • Backend: JavaScript/TypeScript
  • Database: PostgreSQL, PostGIS
  • Frontend: React, MaterialUI
  • API-Library: TRPC
  • Versioning, CI/CD: GitLab

This is what you can expect from us

  • A healthy work-life balance, diversity, a hands-on-mentality and agile work are not only a major part of our culture recorded in writing, but we also gladly live by
  • In addition to fair payment, we offer many social and fringe benefits: a job ticket, driving concessions in local and long-distance transport, company pension, company bike, sports and health offers, affordable holiday- and leisure activity offers and much more
  • We invest in your personal development: every year you have a fixed training budget at your disposal
  • We provide you with an experienced agile coach who offers you agile coaching adapted to your individual needs
  • With flexible working hours, home office days and choice of your software and hardware accordingly to the ioki standard, you are free to fully customize your working space
  • Our modern office is located in the heart of Frankfurt and therefore easily accessible
  • Working with us means meeting an absolutely dedicated and interdisciplinary team
  • Of course, coffee, tea, fresh fruits and even a candy bar are free for all of our employees to enjoy