In a nutshell koppla is building the go-to scheduling tool for construction projects. By providing an incredibly simple to use scheduling tool that makes collaboration easy, we help construction projects stay on time. We are looking for a product-minded Backend Engineer in Berlin to help us design and build impactful features for our growing customer base. This is a unique opportunity to work closely with a highly experienced Senior Backend Engineer, who will mentor and support you as you grow into an exceptional engineer. Compensation: €70k-85k Equity Location: Hybrid setup in Berlin What you'll be doing Collaborate closely with product managers, designers, and frontend engineers to design and implement new features. Build and maintain backend services and APIs (REST/GraphQL) to support user-facing features. Contribute to the development and optimization of our real-time messaging backend (Kafka) that powers real-time collaboration. Work on improving our infrastructure setup in AWS (S3, Dynamo, RDS, ECS, IAM, CloudWatch, Lambda, etc.) using IaC tools like Terraform or Serverless. Help improve observability, monitoring, and alerting for our services to ensure reliability and quick response to incidents (Sentry, CloudWatch). Collaborate with senior engineers to implement best practices for software development, infrastructure, and deployment processes. Participate in code reviews and provide constructive feedback to peers while learning from more experienced engineers. Stack: NodeJS, TypeScript, AWS, GraphQL (Apollo), PostgreSQL, Terraform, Kafka. You should be familiar with some of these or similar technologies. Check out here how we work in Product & Engineering. Who we're looking for This role is perfect for a backend engineer with 3-5 years of experience looking to grow their skills and make a meaningful impact at a company that is approaching product-market fit (approaching €2M ARR). You are likely a great fit if: You have solid engineering fundamentals, write clean and efficient code, and are eager to continue improving your skills. You understand how to balance technical trade-offs and can contribute to discussions about scalability, performance, and maintainability. You care about building reliable, high-quality systems that deliver a great experience for end users. You thrive in a fast-paced startup environment, enjoy taking ownership of your tasks, and stay proactive in solving challenges. What we offer Competitive salary and equity A culture with a focus on transparency, respect, ownership, collaboration and the well-being of each team member on this exciting journey. An environment that values hard-work while still allowing work-life/family integration through 28 days PTO, flexible working hours and a hybrid setup Dog-friendly office in Berlin with free lunch, besides beverages and snacks And more: Annual personal training budget of 1500€, Company supported pension Scheme (”BAV”, 30% contribution), Urban Sports Club Membership and more About us koppla is building the go-to scheduling tool for construction projects. By providing an incredibly simple scheduling tool that makes collaboration easy, we help construction projects stay on time. To empower construction teams to do their best work, we are building a schedule and project management tool that combines UI elegance with world-class performance. We are a fast-growing venture-backed B2B SaaS company founded in 2020, backed by investors like Earlybird and Newion, that counts many of the Top-100 construction companies in Germany as their customers and is constantly expanding their market share. If you want to get to know us better, check out our our team and culture page .