Senior Backend Engineer | Routing Team

About the Team The Routing Team is the engineering core of Instabee, tasked with solving one of logistics' greatest challenges: the "Traveling Salesman Problem" at scale. We build the systems that plan and optimize thousands of last-mile delivery routes in real time. Our team consists of three backend developers, one frontend developer, one full stack/ algorithm engineer, one machine learning engineer, one Engineering Manager, one Product Manager, and one Staff Engineer, and we are now looking for a Senior Backend Engineer, to join our amazing team. This is a role for an engineer who wants to see their code have an immediate, measurable impact on global distribution costs and delivery accuracy. Technical Environment Our ecosystem is built for high-concurrency and reliability. While we are primarily a Golang shop, we value engineers who can navigate polyglot environments and lead the modernization of existing systems. 🐹 Languages: Golang, (Primary), with legacy components in Java and Node.js. 🗄️ Data & Storage: PostgreSQL, MongoDB. ☁️ Infrastructure: GCP, Kubernetes (Helm), Terraform. 🔁 CI/CD & Observability: GitHub Actions, Grafana. Core Responsibilities You will take full ownership of the backend lifecycle, from initial design and requirement gathering to production delivery. A key part of your mission will be evolving our legacy services into modern, high-performance architectures that ensure long-term scalability. We expect you to write clean, maintainable code that sets the standard for the rest of the engineering organization. Beyond the IDE, you will foster a strong engineering culture through technical mentorship and rigorous code reviews. You’ll act as a strategic partner to Product Managers, refining technical solutions that move the needle on our key KPIs. You will also play a critical role in system resilience, leading incident management and root-cause analysis to ensure our production environment remains world-class. About You We are looking for a seasoned backend engineer with deep expertise in Golang and a track record of scaling distributed systems in the cloud. You should have a sophisticated grasp of Kubernetes, Terraform, and SQL, and feel right at home within a Google Cloud environment. The ideal candidate is a pragmatic architect who knows how to balance technical debt with the speed of business delivery. You are a proactive communicator who is comfortable navigating ambiguity and making firm technical decisions. Above all, you are driven by the intersection of high-level software engineering and physical operations—you want your work to result in real-world efficiency. Culture and Professional Environment We believe the best systems are built by engineers who truly understand the user experience. That’s why we offer the unique opportunity to visit our terminals and join delivery drivers on their routes to see your logic in action. To support your craft, we provide paid licenses for advanced development tools and AI-assisted coding agents, alongside regular "Hack Days" to turn your best ideas into production-ready solutions. We operate with a hybrid work model that blends deep-focus remote work with collaborative office days. We’ve built an inclusive environment where professional growth is fueled by autonomy and constant knowledge exchange. Here, you’ll find a team that values your technical opinion and gives you the space to solve genuinely difficult problems. What you’ll get We can promise you that you will be challenged, develop your skills and have the opportunity to work with truly amazing and competent colleagues. Of course, we have all the necessary and standard benefits in place, but in addition to this, we can also offer: 🌇 Sky-High Office: Modern and newly renovated with a 360-degree view around Stockholm. 🐶 Puppy Friendly: Bring your dog to work - we've got a whole floor for our furry friends! 🥐 Wednesdays Tech Breakfasts: Fuel your midweek with tech talks and tasty bites. 👾 Tech Demos:...