Senior Platform Engineer

Flightradar24 is one of the most successful growth-stage tech companies in Stockholm. Each month more than 50 million aviation enthusiasts visit Flightradar24 (app/website) and our Commercial services team has many of the biggest names in aviation on its customer list. We are looking for a Senior Platform Engineer with Data Engineering skills, who can quickly understand existing systems, work independently, and deliver value from day one. You will play a key role in evolving and improving our data platform, working closely with other engineers and stakeholders. You will be part of a data engineering team responsible for designing, building, and operating scalable data solutions in AWS. The work includes both hands-on development and architectural decision-making. The position requires that you are able to work from our office in Stockholm, Sweden. Relocation is not offered for this role. What you’ll do Your responsibilities include: Building and maintaining backend services for high-volume data processing and APIs Designing and improving data ingestion, streaming, and event processing (batch and real-time) Refactoring and enhancing existing services, pipelines, and infrastructure Implementing robust data collection, transformation, and storage solutions Operating and improving cloud-based platforms (primarily AWS) Improving observability, reliability, and operational tooling for production systems Contributing to best practices around CI/CD, testing, code quality, and documentation Collaborating with software engineers, data engineers, and analysts to deliver reliable data products Current tech stack Backend services: C++ and Python Cloud & Data Platform: AWS (S3, Glue/Spark, Airflow/MWAA, Athena, MSK/Kafka, Lambda) Streaming & Messaging: Kafka (or similar), RabbitMQ Databases & Storage: SQL/NoSQL systems (e.g., MySQL/MariaDB/Postgres, Redis, DynamoDB, data lake/warehouse patterns) DevOps & Platform: Docker, Kubernetes/EKS, Terraform Engineering practices: Infrastructure as Code, CI/CD, linting, unit tests, integration tests About you Has several years of hands-on experience building and operating production systems Strong experience with software development in C++, Python, Go, Rust, (or similar) Strong experience designing and operating production backend systems Experience with data engineering architectures for ingestion and transformation Experience working with cloud-based platforms, preferably AWS Solid understanding of databases (warehouses, OLTP/OLAP concepts, query performance) Experience with event-driven or streaming architectures (Kafka or similar) Strong understanding of reliability, observability, and production operations We also see that you… Are self-driven and comfortable making technical decisions independently Can quickly understand and work within an existing codebase and architecture Value clean code, testing, automation, and pragmatic engineering practices Communicate clearly and professionally in English Bonus points Experience with Machine Learning concepts and data platforms supporting ML workloads Experience working with high-volume real-time telemetry or tracking data Domain knowledge in aviation data standards (e.g., ADS-B) or similar About Flightradar24 With over 6 million daily users, Flightradar24 is the world’s most popular flight tracking service. Our app regularly tops the App Store and Google Play Travel charts. We also offer a wide range of commercial services and our customers include many of the biggest names in aviation. We're constantly adding new services and improving existing products. To help us meet those challenges, we're looking for creative, collaborative and tech-savvy applicants to join us. Benefits of working at Flightradar24 include: Opportunity to impact a service with millions of end users from all around the world Flexible and social work environment with free beverages, fruit, and snacks Modern office in the heart of beautiful downtown Stockholm, Sweden Being part of a