Backend Engineer - Agentic Systems

About the role Software development is being redefined. Agentic coding is changing what an engineer does day to day, from how code gets written, to how it gets tested, to how whole systems get shipped. Cape.io wants to be on the front line of that shift, not a late adopter of it. We are looking for a backend engineer who is genuinely excited about this. Someone who wants to help define the way software engineering works here, not just keep an existing process running. If you already reach for coding agents by instinct, and you have opinions about where this is going, this is your kind of role. About Cape.io At Cape.io, we aren't just keeping pace with the advertising industry. We are rewriting its rules. We built the world's first Intelligent Campaign Automation platform, eliminating the friction between creative ideas and media deployment. Our tech is trusted by global brands to scale and launch campaigns across 100+ countries. The engine behind that runs on a young, fast-moving team in Tilburg. We operate like a high-growth startup with the backing of a global powerhouse. Small team, moving fast, real impact you can see daily. What you'll do You will join a young, fast-moving team in Tilburg, building backend systems for a high-scale SaaS platform in an agentic-first way. We operate like a high-growth startup with the backing of a global powerhouse - a small team moving fast, with real impact you can see daily. Concretely: Build and scale backend systems, with coding agents as part of how you work: decompose problems, write clear specs, and steer the work to a correct result.Own the quality bar. Review and validate agent-generated code with the depth to catch what an agent gets subtly wrong, and take end-to-end ownership of the components you ship.Push agentic testing forward. Help move us from automated coding into agent-driven testing, so correctness scales with speed instead of lagging behind it.Help build the harness. With frontier models converged, the tooling around the agent is where most of the leverage now lives, and our team is building that layer at Cape.io: shared skills, codebase context served over MCP, agentic testing that blocks bad code from merging, and tight tool curation. You will help shape and extend it.Make architecture decisions for performance, reliability, and long-term maintainability on our Node.js and TypeScript services. What you'll bring We want an engineer who thinks in systems, and who is motivated to define how software gets built rather than just execute tickets. Real enthusiasm for agentic coding, and hands-on experience directing coding agents (Claude Code or similar) on non-trivial work.4+ years of backend software engineering, specifically with TypeScript and Node.js. Strong enough in the fundamentals to judge agent output, not just accept it.Solid grounding in backend architecture and system design.Experience building scalable, distributed systems.Experience with GitLab, Jira, and CI/CD pipelines.Knowledge of Redis, MySQL, MongoDB.Bonus points: Experience influencing technical direction within a team.Ideas about agentic testing, verification, or developer tooling, and a track record of building or improving it.Experience with event-driven or message-based architectures.Hands-on experience with Google Cloud, including Pub/Sub, Cloud Tasks, Cloud Run, and Kubernetes. Our DNA: How we work Our values aren't just words on a wall; they are the principles that guide our decisions, actions, and interactions every day. Move smart: Hesitation kills momentum. We combine speed with intelligence, turning complex challenges into automated solutions. Every experiment teaches us, every failure makes us stronger.Define tomorrow: We're not here to meet expectations; we're here to reset them. Our mission demands unprecedented quality, security, and scale. We push the boundaries of what's possible.Be better together: Success multiplies when shared. We step up, dig in, and make things better for each other. Through open collaboration and fierce support, we turn individual potential into collective achievement.Change what’s possible: Creativity drives humanity forward. Our technology exists to amplify it, protect it, and let it soar. We remove barriers between great minds and great work. Why join Cape.io? Front line, not sidelines: We are actively redefining how we engineer, and you get to shape it.Real challenges: A high-volume, market-leading product with genuine architectural complexity.AI-first culture: Agentic development isn't a buzzword here. It is how we work, and we are still building it.The best of both worlds: The energy, speed, and fun of a young Tilburg team, backed by the stability and benefits of a global company.The perks: Competitive salary, travel allowance, flexible/hybrid working, and a culture that celebrates shared success. Are you ready to change what's possible? Apply now.