Fullstack Entwickler (C#, Java, PHP, Python, JavaScript)

Career Level: Professional / Middle / Experienced, Language: German, Tech Stack: .NET (C#, VB), City: Dortmund, Country: Germany

Job Description

Location: Dortmund, on-site

Type: full time; permanent

About company: Our client is a top-tier digital comparison platform in Germany, enabling consumers to easily evaluate and purchase a wide range of services and products—from insurance and energy providers to telecommunications, financial offerings, travel, and beyond.

Blending the reliability of an established market leader with the agility of a startup, the company operates in agile, cross‑functional teams with flat hierarchies and rapid decision‑making processes. With over 50 product categories and more than 20 million users, the team is driven by innovation, leveraging modern technologies and AI to continuously enhance the user experience.

About the product: The team is currently focused on developing a next‑generation digital tax solution—a modern FinTech product aimed at simplifying tax returns. They are looking for a Senior Software Developer to take ownership in advancing the product and to support internal tools and back‑office systems.

Responsibilities

• Further development and maintenance of systems, including single‑page applications in the frontend, HTTP servers in the backend, databases, cloud storage, and more.
• DevOps: From rolling out and automatically provisioning new servers to implementing releases.
• Collaborate with product management and the IT team on the conception and implementation of new features in an agile Kanban process.
• Quality assurance through continuous improvement of CI pipelines and participation in code reviews.
• Mentor and act as a sparring partner for the team.
• Oversight of system performance, providing catalysts for further developments and serving as technical lead on larger topics.

Requirements

• Completed IT studies (computer science, business informatics, or similar) or training as an IT specialist (m/f/d).
• Strong coding skills: capable of handling puzzles as well as database queries.
• Familiar with test‑driven development, rapid prototyping, and other aspects of agile software development.
• High standards for code, standing up for them and inspiring team members to find the best solutions for the product.
• Ideally, experience in operating software systems and a DevOps mindset.

Benefits

• Stability and security of a large company blended with the flexibility and flair of a dynamic start‑up through small units.
• Long‑term career growth opportunities with a strong and sustained growth path; individual development and further training opportunities available.
• Freedom to turn ideas into final features and influence the company's success.
• Team spirit outside of work: events such as monthly drinks outings, summer and Christmas parties; playing football, Xbox, darts tournaments.
• Daily extras: drinks, fruit, cereal, lunches; vouchers for numerous company products and subsidised company pension plan.
• Central location directly at Dortmund main station with excellent transport connections; VRR ticket subsidised by the company.