Senior Scala + Java Engineer

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.

Responsibilities

Design and implement scalable backend services in Scala
Work extensively with Typelevel libraries (Cats, Cats Effect, FS2, Http4s, etc.)
Model complex business domains using strong type systems
Build and maintain event-driven and distributed systems
Contribute to architectural decisions around concurrency, streaming, and data consistency
Write clean, testable, and maintainable code
Improve CI/CD pipelines, observability, and system reliability
Collaborate closely with product and platform teams

Tech Stack

Scala (2.13 / 3)
Cats / Cats Effect / FS2 / Http4s

Kafka (event-driven architecture)

PostgreSQL
Docker / Kubernetes
AWS
CI/CD (Github Actions)

Required Experience

4+ years of backend development experience (Scala)
Strong production experience with Java
Java Spring Boot knowledge
Hands-on experience with the Typelevel ecosystem
Familiarity with event-driven architectures (Kafka)
Deep understanding of: Effect systems (Cats Effect); Functional programming principles; Type classes, higher-kinded types; Pure vs impure boundaries
Experience building distributed systems
Strong understanding of concurrency and asynchronous programming
At least upper-intermediate English level

Nice to Have

Experience with Scala 3
Knowledge of tagless-final patterns
Experience in fintech or high-integrity domains
Experience contributing to open source

We offer*:

Flexible working format - remote, office-based or flexible
A competitive salary and good compensation package
Personalized career growth
Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
Active tech communities with regular knowledge sharing
Education reimbursement
Memorable anniversary presents
Corporate events and team buildings
Other location-specific benefits
not applicable for freelancers

Senior Scala + Java Engineer

Key Skills

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