Senior Product Engineer (f/m/d)

Your mission Working model: Hybrid countX is a Berlin-based SaaS company that simplifies EU VAT compliance for e-commerce businesses. Our platform automates VAT registration, reporting, and compliance processes, enabling online merchants to expand across Europe with less administrative effort and lower compliance risk. We are looking for a Senior Product Engineer to own features end-to-end—from problem discovery and system design to implementation, deployment, and continuous improvement. You will work autonomously across the stack, making pragmatic engineering decisions that deliver meaningful customer value. At countX, you won’t be handed a backlog of predefined tickets; instead, you’ll be trusted to identify opportunities, define solutions, and bring them to life. Our engineering team embraces modern AI-assisted development practices and works extensively with Claude Code to accelerate development and improve code quality. Our tech stack includes PHP, TypeScript, Python, Go, and React, and we value engineers who are comfortable working across technologies and choosing the right tool for the problem at hand. Your Responsibilities Own product features end to end — from discovery and design through delivery, monitoring, and iterationMake sound system design and architecture decisions, balancing speed, scalability, and maintainabilityThink infrastructurally — understand how your code runs, scales, and fails in production, and design accordinglyWork autonomously with minimal supervision, setting your own direction and managing your own prioritiesUse Claude Code and modern AI-assisted development workflows to deliver high-quality software fasterCollaborate with product, design, and other engineers to turn ambiguous problems into shipped solutionsRaise the engineering bar through pragmatic decisions, clean implementation, and continuous improvement Your profile 7+ years of professional software engineering experienceDemonstrated strength in system design thinking — able to reason about trade-offs, boundaries, and scaleStrong infrastructural thinking — comfortable with how systems are deployed, observed, and operated in productionProven, hands-on usage of Claude Code and modern AI-assisted development methodologiesTrack record of working autonomously and delivering with minimal supervisionLanguage agnostic — able to pick up and be productive in whatever language a problem calls forPlatform agnostic — comfortable across backend, frontend, cloud, and tooling as neededStrong ownership mindset and a bias toward shippingStrong, clear written and verbal communication in English About Us At countX, we believe that taxes shouldn’t slow down growth. That’s why we automate processes so entrepreneurs can focus on what really matters – their business. Behind countX is a dedicated team of experts with personality, passion, and a shared goal: to make taxes across Europe simpler, more transparent, and more efficient. What unites us is not only our expertise, but also our conviction that collaboration at eye level and modern technologies make the difference. We create solutions that give our customers freedom – and give us the space to grow together.