Job
- Level
- Junior
- Location
- Cologne
- Working Model
- Hybrid, Onsite
- Job Field
- Web, Data, Full Stack
- Employment Type
- Full Time
- Contract Type
- Permanent employment
Job Summary
In this role, you develop innovative features for our product comparison, implement backend and frontend solutions, and work with AI-supported technologies and modern APIs to optimize our systems.
Job Technologies
Your role in the team
- You work on a variety of innovative topics in our product comparison - from booking routes, comparison results, and self-services to AI-powered assistant functions - from data logic in the backend to the user interface in the frontend.
- You develop our systems holistically - from APIs and backend services to LLM services and their orchestration, as well as high-performance and user-friendly frontend components.
- You develop intelligent features with Large Language Models - e.g., chat and assistant functions, extraction and structuring of information, or data-driven recommendations. In doing so, you work with LLM agents and their orchestration (tool use, state/memory, workflows) - with the aim of making AI productive and controllable.
- You independently drive the technical implementation of product improvements, ensure clean code, and maintain the stability and future viability of our applications.
- You ensure quality through strict typing, static analysis, as well as automated unit, integration, and end-to-end tests, and drive the further development of our testing systems.
- In close collaboration with our product management team, you will implement new features, contribute your own ideas, and actively participate in optimizing our development processes.
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Our expectations of you
Education
- Excellent completed training as an IT specialist (m/f/d) or a degree in a relevant field.
Qualifications
- You are eager to understand and implement features from start to finish, across service and language boundaries.
- Interest in AI features with Large Language Models as well as initial exposure to agentic workflows.
- Confident handling of AI-assisted development - targeted use of LLMs and coding agents as tools, as well as knowledge of suitable patterns (e.g., Spec-driven Development, persistent agent instructions, or iterative agent loops) while maintaining solid programming skills.
- Quality-conscious, solution-oriented, and independent work approach with initiative as well as a passion for lifelong learning and continuous evaluation of new trends.
- You bring motivation to continuously develop our product, the team, and yourself.
- Fluent German and good English skills.
Experience
- Initial experience in full-stack web development as well as an understanding of modern API development (e.g., type-safe APIs) and clean modeling of data and interfaces.
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What we offer
- You can expect an attractive salary package, vouchers for CHECK24 products, and a subsidized company pension scheme.
- Work in the office all week or remotely from home on Fridays. Enjoy up to 2 weeks of workation as well.
- We promote your personal development through targeted training, regular feedback, and an individual budget for your further education.
- From day one, you will receive a MacBook, additional monitors, and an ergonomic workspace - optionally with additional equipment.
- Look forward to free lunch, drinks, fruit, muesli, and monthly team lunches.
- Stay fit with our 50% subsidy for EGYM Wellpass as well as weekly personal training.
- Our office is centrally located near the Rhine in Cologne, directly on Heinrich-Heine-Allee. Thanks to the takeover of your Germany ticket or subsidized Job-Rad/eBike, you can commute to the office in an environmentally friendly and affordable way.
- Celebrate and network at numerous events, summer and Christmas parties, as well as sporting activities - we support team events with a dedicated annual budget.
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Benefits
Work-Life-Integration
Health, Fitness & Fun
Food & Drink
Higher Take-Home Pay
Topics You Will Work On
Job Locations
About Your Employer
CHECK24 Gruppe
CHECK24 is one of Germany's leading online companies and the country's largest comparison portal. And we're growing - with you. If you want to move something, you've come to the right place. Experience the dynamics of e-commerce, agile processes, flat hierarchies and steep development curves.
Description
- Company Type
- Established Company
- Working Model
- Hybrid, Onsite
- Industry
- Banking, Finance, Insurance, Internet, IT, Telecommunication
Employer reviews
by devworkplaces.com
Total
(3 Reviews)4.1
Engineering
3.8Workingconditions
4.2Career Growth
4.3Culture
4.2
Junior Full Stack Developer
- Location
- Cologne
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
