Full-Stack Developer (m/f/d) Python

SEPPmail AG; Lavamünd; Hybrid; EUR 90.000 - 130.000; Vollzeit

Zusammenfassung

SEPPmail AG is seeking an experienced Full-Stack Developer with a strong backend focus and a passion for clean, tested code. The role offers fully remote work from anywhere in Germany or Switzerland, and a chance to influence architecture and development practices in a distributed team.

You will design robust backend services, contribute to frontend when needed, and apply Domain-Driven and Behaviour-Driven Development principles to deliver high-quality software.

Qualifikationen

• Must have: Python, FastAPI, GitLab, CI/CD, agentic/AI-supported development.
• Nice to have: TypeScript, React, PostgreSQL, Domain-Driven Design, Behaviour-Driven Development.

Aufgaben

• Full-Stack Developer with a clear backend focus across our products and solutions.
• Design and implement robust backend services and contribute to frontend development where needed.
• Design database schemas and integrate CI/CD into development pipelines.
• Apply AI-supported development methods to accelerate processes with clean, maintainable code.
• Develop deep understanding of products and business logic.
• Use Domain-Driven Design and Behaviour-Driven Development to translate requirements into software.
• Contribute to planning, identify problems, and drive solutions forward.

Kenntnisse

Python

FastAPI

GitLab

CI/CD

agentic/AI-supported development

Tools

TypeScript

React

PostgreSQL

Jobbeschreibung

Your mission

To strengthen our development team, we are looking for an experienced, generalist-minded professional with a passion for clean code and modern development methods who will help us continuously improve our products.

This position is fully remote – you can work from anywhere in Germany or Switzerland.

Your responsibilities

• You work as a Full-Stack Developer with a clear focus on backend development across our products and solutions.
• You design and implement robust backend services and, where necessary, also contribute to frontend development.
• You design database schemas and bring your understanding of CI/CD processes into our development pipelines.
• You use AI-supported, agentic development methods in a targeted and responsible way to accelerate development processes – always with a focus on clean, maintainable and well-tested code.
• You develop a deep understanding of our products and the underlying business logic.
• You apply Domain-Driven Design and Behaviour-Driven Development to translate requirements precisely into software.
• You actively contribute to our planning and development process, proactively identify problems and independently drive solutions forward.
• You share your knowledge within the team and support junior developers in their professional development.

Your profile

Your skills

• Must have: Python, FastAPI, GitLab, CI/CD, agentic/AI-supported development
• Nice to have: TypeScript, React, PostgreSQL, Domain-Driven Design, Behaviour-Driven Development

What you bring

• Several years of experience as a Full-Stack Developer with a clear backend focus, including at least 5 years of backend development experience with Python
• Experience working in distributed teams and familiarity with remote collaboration
• A strong quality mindset with a focus on clean, maintainable, well-tested and traceable code, particularly when working with AI-generated code
• A high level of initiative, an independent way of working and the ability to proactively identify and address problems
• Enjoyment in sharing knowledge and supporting junior developers in their professional development
• Strong communication skills in an international, distributed team

Why us?

At SEPPmail, you will take responsibility from day one for products used by thousands of users across Europe every day. You will continue to develop professionally by actively shaping modern technologies and methods such as agentic development, Domain-Driven Design and Behaviour-Driven Development. As an experienced professional, you will have the opportunity to share your knowledge, support junior developers and make a meaningful contribution to the continued development of the company. As the company continues to grow, there will also be opportunities for personal development and career progression.

• A role with real responsibility at an established, PE-backed market leader in email security with more than 25 years of experience
• The opportunity to work from home or remotely as part of a distributed team
• Short decision-making processes, flat hierarchies and an open, appreciative company culture
• Plenty of scope for initiative and shaping modern, AI-supported development processes
• A team that actively promotes knowledge sharing and mutual support
• Exciting, security-critical products with direct customer value for well-known companies and institutions