Senior Software Engineer - Full Stack (x/f/m) (Python & React)

We're not just building a company; we're crafting a legacy. Your role at SellerX is pivotal because we firmly believe that our company is only as exceptional as the team we assemble. Join us in shaping the future of eCommerce and be a part of a company that values innovation, collaboration, and continuous growth. 

Python • FastAPI • React • Docker • AWS • Terraform • Git • Snowflake

• Competitive compensation and growth opportunities

• Real ownership and meaningful technical influence

• High-impact projects across multiple business domains

• A collaborative, international engineering environment with space to contribute ideas and shape how things are built

If you love building scalable systems with Python and modern React, care deeply about clean architecture, and enjoy turning complex problems into elegant solutions this role is for you.

At SellerX, you’ll help build and scale the technical backbone that powers our global e-commerce operations. This is a high-ownership role where your decisions directly impact how fast and effectively our teams operate.

• Design, build, and own scalable internal platforms and services

• Manage architectural decisions that improve reliability, performance, and maintainability

• Partner closely with Product, Data, and Business teams to translate complex requirements into robust technical solutions

• Elevate engineering standards through best practices, testing, documentation, and thoughtful code reviews

• Leverage AI-powered development tools to increase speed and quality

• Shape the technical roadmap of multiple internal products

• Strong experience in Python backend development (FastAPI or similar frameworks)

• Proven expertise in React (or similar) and modern frontend architecture

• Experience with Docker, API design, cloud environments (AWS preferred) and Microservices architecture

• Solid understanding of system design, scalability, and clean code principles

• A startup mindset: proactive, autonomous, and solution-oriented

• Excellent communication skills and the ability to explain complex systems understandable

• A desire to mentor, raise the bar, and continuously improve how things are built

We are always happy to read your application and hear your story. Everyone's talent is unique!

SellerX is a global e-commerce company on a mission to build iconic consumer brands that are found everywhere and loved every day. Founded in Berlin in 2020, we’ve grown into one of Europe’s leading brand platforms, with more than 20 brands across multiple categories. We leverage our expertise and digital-native edge to transform Amazon best-sellers into global household names with omnichannel reach. Backed by world-class investors including BlackRock, L Catterton, Sofina, and Victory Park Capital, and with offices across Europe, Asia, and North America, we are powered by bold, passionate talent eager to shape the future of e-commerce.

At SellerX, we celebrate diversity and are committed to creating an inclusive workplace where everyone feels valued and respected, regardless of race, color, religion, gender, sexual orientation, national origin, genetics, disability, age, or veteran status. We warmly encourage people from all backgrounds to apply.

We are dedicated to ensuring equal opportunities in recruitment, training, promotion, and compensation. SellerX is proud to cultivate a diverse and talented team, reflecting the global nature of our business. Join us in creating an environment where innovation, creativity, and collaboration thrive!