We are a colorful team of over 300 congstars and belong to one of the best employers and leading telecommunications providers in Germany. You can find us right in the heart of Cologne in the beautiful Rheinauhafen or remotely working from home.

As part of Deutsche Telekom, we offer the best of both worlds: We combine the flexibility of a start-up with the security of a corporation behind us.

Diversity inspires us — our own and yours. With us, it is allowed and even desired to question things. We really enjoy what we do and it shows. We're colorful, we're creative and we're in the mood — for you!

Among other things, we offer:

Flat hierarchies and the opportunity to actively shape our processes, products and congstar as a company
Flexible working hours and hybrid working model at Cologne's Rheinauhafen (up to 70% remote work is currently possible)
Work (up to 20 days/year in other EU countries)
Free access to a mental health platform including individual and group sessions as well as webinars with psychological experts and coaches for your mental wellbeing as well as other comprehensive health services
Attractive discounts for employees
Deutschlandticket subsidy and bicycle leasing to promote sustainable mobility
Flexible choice of the number of vacation days you have and the amount of your variable salary share
Targeted and individual development opportunities

This is what you can expect:

Strategy: Together with your cross-functional team, you push ahead with the development of our mobile apps (iOS/Android) and the associated backend services — from the initial idea to API design to observability during operation.
Bridge builder: The translation of business requirements into clear technical specifications (e.g. API contracts) is up to you. In doing so, you prioritize tasks with the product owners and support the implementation until go-live.
Analytical vision: You identify technical and professional dependencies and evaluate solution options in order to make reliable recommendations based on data.
Data-driven: You can skilfully link telemetry data such as logs, metrics, and traces with business KPIs to derive concrete improvements for UX, stability and performance.
Smart working: You use AI tools responsibly and efficiently to optimize analyses, documentation, testing, and dev workflows.

This is what you have in your luggage:

Wealth of experience: You are very familiar with app development projects and always keep an eye on both the frontend (mobile) and the backend (microservices).
Strong communication skills: Breaking down complex problems and moderating technical decisions is your thing. You coordinate confidently with PO, Dev, QA, Operations and stakeholders and document where it makes sense.
Mindset: You approach challenges in a pragmatic, respectful and solution-oriented way. In doing so, you are open to new things, in particular for AI-based ways of working, and always keep topics such as privacy and compliance in mind.
Thirst for knowledge: You enjoy learning new things — and you share this knowledge proactively with your team.
Humor: Laughing is part of your work. Every day. Several times.

Severely disabled people are given priority if they are equally qualified.

Your contact person

Madeleine Walter & Markus Ollig

Congstar Talent Acquisition

Talent s@congstar.net