Software Engineer, Product (Full-Stack: Angular, Kotlin, MongoDB)

Why Join Sidestream? At Sidestream, we’re building a team of committed, explorative and witty individuals who love pushing boundaries while having fun. Here’s what you can expect: Impactful Work: Contribute to projects that matter, whether it’s digitalizing leading companies, developing open-source tool or innovating with blockchain and AI. Learning & Growth: Gain mentoring from experienced professionals and access to proven processes that prepare you for success in a fast-paced tech environment. Our Culture of Excellence: Embrace modern systems like the Entrepreneurial Operating System (EOS) to deliver outstanding performance and achieve ambitious goals. Collaboration & Fun: Be part of a driven team that values humor, creativity and shared experiences, with regular team events and occasional meetups. Flexibility: Work remotely, from our modern office in Cologne, or a mix of both—whatever helps you thrive. Tasks Your Responsibilities Fullstack Development: Build robust applications using TypeScript, Nuxt3 and Vue. Lead Projects: Collaborate with product managers to conceptualize, architect, and implement projects in agile teams. Mentor and Guide: Help junior developers level up their skills through mentoring and collaborative projects. Drive Innovation: Propose and implement new technologies or methodologies to keep Sidestream at the cutting edge. Requirements What You Bring Deep Expertise: You have advanced experience in TypeScript or JavaScript and a solid understanding of frameworks like Nuxt and Vue. Full-Stack Confidence: You’re comfortable working on both frontend and backend projects, taking ownership of the entire stack. Leadership in Action: You can independently complete projects and enjoy mentoring less experienced developers to help them grow. Craftsmanship: You take pride in writing high-quality, peer-reviewed, and production-ready code that makes a real impact. Pragmatic Approach: You focus on doing the right things, the right way, efficient…

Publié 9 Oct 2026

Why Join Sidestream? At Sidestream, we’re building a team of committed, explorative and witty individuals who love pushing boundaries while having fun. Here’s what you can expect: Impactful Work: Contribute to projects that matter, whether it’s digitalizing leading companies, developing open-source tool or innovating with blockchain and AI. Learning & Growth: Gain mentoring from experienced professionals and access to proven processes that prepare you for success in a fast-paced tech environment. Our Culture of Excellence: Embrace modern systems like the Entrepreneurial Operating System (EOS) to deliver outstanding performance and achieve ambitious goals. Collaboration & Fun: Be part of a driven team that values humor, creativity and shared experiences, with regular team events and occasional meetups. Flexibility: Work remotely, from our modern office in Cologne, or a mix of both—whatever helps you thrive. Tasks Your Responsibilities Contribute to Open Source: Write, maintain, and enhance open-source projects like Sidebase and actively engage with the developer community. Community Engagement: Address issues, create documentation, and develop a vision for open-source initiatives. Fullstack Development & Technical Lead: Build robust applications using TypeScript, Nuxt3 and Vue. Collaborate with product managers to conceptualize, architect and implement projects in agile teams. Mentor and Guide: Help junior developers level up their skills through mentoring and collaborative projects. Requirements What You Bring Open-Source Enthusiast: You have experience contributing to open-source projects and actively engaging with the community. Tech-Savvy: You’re proficient in TypeScript or JavaScript and have a solid understanding of frameworks like Vue or React. Modern Tech Explorer: You enjoy working with cutting-edge technologies like Nuxt 3 and Kubernetes, staying ahead of the curve. Craftsmanship in Code: You take pride in writing clean, composable, and peer…

Publié 9 Oct 2026

We're looking for a Senior CRM Manager to own CRM analytics and execution across all three brands and 5 markets with a focus on email automation in Klaviyo. If you're looking to take full analytical and operational ownership to develop our cohorts to their full potential this might be for you! This role is not about writing copy & campaigns its about building a AI focused automation system in Klaviyo. Tasks Develop our core customer metrics like repurchase rate and customer lifetime value Own CRM performance across three brands and 5 countries end to end. (DACH + FR + US) Build granular, multi-dimensional segmentation (RFM, product affinity, lifecycle stage) Design and run a real A/B-testing with clear hypotheses, proper sample sizes, decisions based on revenue per recipient Use Claude as your default tool for copy, creative briefing, and campaign production Automate reporting and recurring CRM processes (e.g. via Klaviyo MCP, n8n) Build toward a state where no campaign is manually built and sent - flows and automation do the work Requirements Multi year B2C e-commerce background ideally in an international setting Deep, advanced Klaviyo experience - flows with custom actions, API calls, etc. Already using Klaviyo MCP or genuinely eager to work this way Very strong analytical mindset: you think in segmentation logic and test hypotheses Comfortable in Klaviyo's templating language (HTML+Liquid) Nice to have: Basic scripting (Python/JS) for data exports and automation Experience with SMS as a channe Experience with WhatsApp as a channel Benefits Over 1 million orders, 5 markets, 3 brands – things are happening here. You take on real ownership instead of being just a cog in the machine. Dynamic team with a real culture: a weekly trophy for living our values, celebrating anniversaries and birthdays together, and monthly after-work drinks. Deutschland-Ticket, a €250 shopping budget in our own shops, and additional benefits like Urban Sports Club M. A new sport ever…

Publié 9 Oct 2026