Senior Scala + Java Engineer

Nix

Ukraine (Europe, Ukraine) Remote permanent

Posted: March 27, 2026

Required Skills

Job Description

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

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