Senior Backend Developer

About the team:You will join our multidisciplinary Messaging & Transactions Team in Amsterdam as a backend developer in, reporting to the team's Engineering Manager. You will focus on transactions processed through chat on Marktplaats, including payment, tracking, and shipping transactions. We follow a data-driven Agile process, using A/B testing and customer insights to prioritize, validate, and iterate on features. What you'll do:Collaborate with product managers and other stakeholders to understand project requirements and translate them into technical specifications. Design and implement scalable, reliable, and maintainable software solutions. Write clean, efficient, and well-tested code using industry best practices. Help to improve work in all areas: coding, processes, testing, tools, collaboration. Who you are:You have experience in software development for high-traffic online platforms, working with a large codebase and a large user base. 5+ years of full-time employment on large and distributed systems. You live and breathe Agile development, focus on delivering, and like to take an active role in improving how we work. You currently reside in the Netherlands and are legally authorized to work here. Core Skills: Team player. Experience running large systems written in JVM languages like Java, Kotlin or preferably Scala. Experience in event-driven microservices architecture. Experience with CI/CD pipelines and DevOps practices. Experience running services in cloud environments like AWS. Experience with relational databases (like MySQL). Familiarity with designing REST APIs Familiarity with Agile methodologies. Comfortable working with and maintaining legacy systems. Proactive in identifying and implementing system improvements. Bonus Skills: Experience with Kafka, Elasticsearch, RabbitMQ, and Terraform. Familiarity with observability tools preferably Datadog. Familiarity with containerized environments like Kubernetes. Previous experience with marketplace platforms and payment system integrations is a strong advantage. Other Skills: A user-first approach to development, thinking critically about how features will be used in real-world scenarios. Experience communicating proposals, status updates and solutions to colleagues, team members and collaborators. A drive to take an active role in projects, foster collaboration and ensure alignment with other teams. A commitment to learning, staying updated on industry trends, and exploring creative solutions.