About the client: Our customer is the European online car market with over 30 million monthly users, with a market presence in 18 countries. As a Senior Scala Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.
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Responsibilities Design and implement scalable backend services in Scala
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Work extensively with Typelevel libraries (Cats, Cats Effect, FS2, Http4s, etc.)
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Model complex business domains using strong type systems
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Build and maintain event-driven and distributed systems
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Contribute to architectural decisions around concurrency, streaming, and data consistency
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Write clean, testable, and maintainable code
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Improve CI/CD pipelines, observability, and system reliability
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Collaborate closely with product and platform teams Tech Stack Scala (2.13 / 3)
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Cats / Cats Effect / FS2 / Http4s Kafka (event-driven architecture) PostgreSQL Docker / Kubernetes
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AWS
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CI/CD (Github Actions) Required Experience 4+ years of backend development experience (Scala)
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Strong production experience with Java
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Java Spring Boot knowledge Hands-on experience with the Typelevel ecosystem
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Familiarity with event-driven architectures (Kafka)
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Deep understanding of: Effect systems (Cats Effect); Functional programming principles; Type classes, higher-kinded types; Pure vs impure boundaries
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Experience building distributed systems
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Strong understanding of concurrency and asynchronous programming
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At least upper-intermediate English level Nice to Have Experience with Scala 3
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Knowledge of tagless-final patterns
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Experience in fintech or high-integrity domains
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Experience contributing to open source We offer*: Versátil working format - remote, office-based or adaptable A competitive salary and good compensation package
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Personalized career growth
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Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
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Active tech communities with regular knowledge sharing
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Education reimbursement
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Memorable anniversary presents
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Corporate events and team buildings
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Other location-specific benefits not applicable for freelancers