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

About Us

RSN8 gives marketers a new way to optimize their content for their specific audience without giving up on human creativity. With RSN8, brands can drastically improve the effectiveness of their messaging and measurably increase their revenue (10%+ for an A/B tested campaign), all the while saving on expensive customer surveys. We achieve this by leveraging state-of-the-art AI-models to predict how content resonates with the companies' specific target groups: marketers get immediate and concrete feedback on how to improve their creatives for greater impact. To ensure all of RSN8's models stand on a firm scientific foundation we work with renowned researchers from Harvard and LMU. No more human guesswork, just science-backed insights.

We’re looking for a Senior Full-Stack Developer ready to make an impact, take full ownership and help shape the future of our product. If building cutting-edge technology and driving real-world results excites you, we want you on our team!

Responsibilities

• Develop and Enhance the Platform: Implement new features for the customer and improve existing ones based on client needs. Ensure both backend and frontend components are robust and scalable

• Feature Ownership: Take full ownership of key projects, including major initiatives like launching the Chrome Extension and shipping new analysis types for different customers

• Product Launches & Integrations: Support product and integration launches, ensuring smooth delivery and high-quality performance

• Innovation & Problem Solving: Contribute ideas to improve the platform, not just execute tasks. Identify new features and improvements that add value for users

• Data Integration: Analyse and integrate third-party data to optimize product functionality and user experience

• Collaboration: Work closely with the Co-Founder to align on priorities, goals and product vision

• Client Insights & Analysis: Assist in analysing how clients use the platform to inform future improvements and enhancements

What we Offer

• Flexible Hybrid Setup

• Own a Piece of the Company – VSOPs let you share in our growth

• Make a Real Impact – your work will shape our product and business

• Work Closely with Leadership – collaborate directly with the team driving our vision

• 5+ years of professional coding experience with a proven track record of shipping features

• Strong background in TypeScript (3+ years)

• Confident in React and Express

• Experienced in designing implementation strategies for scalable solutions

• Familiarity with AI tools

• High flexibility and adaptability to changing priorities

• Strong problem-solving and analytical skills

• High accountability and ownership mentality

• Excellent communication and interpersonal skills

• English fluency