Remote Scala Backend Engineer — Scalable API Expert

Scala Developer - UK/Remote

My client are seeking a talented Scala Developer to join their engineering team and contribute to the design and development of scalable, high‑performance applications . This role involves working on modern distributed systems, building APIs, and collaborating with cross‑functional teams to deliver enterprise‑grade solutions.

Key responsibilities:

• Design, develop and maintain backend services and APIs using Scala and Play Framework .
• Implement RESTful endpoints, manage request/response lifecycle, and handle authentication/authorization flows.
• Write well-structured, idiomatic Scala and use functional programming patterns where appropriate.
• Build and maintain automated tests (unit, integration), and support test automation efforts.
• Collaborate with product owners, UX, QA, and other engineers in an Agile environment (Scrum/Kanban).
• Participate in code reviews, architecture discussions and pair programming.
• Troubleshoot and resolve production issues; contribute to reliability and observability (logging, metrics, alerts).
• Help define CI/CD pipelines and deployment processes (e.g., Jenkins/GitHub Actions/Concourse).
• Produce concise technical documentation and handover notes.

Must-have skills & experience:

• Strong professional experience with Scala (minimum 3+ years).
• Hands-on experience with Play Framework (2+ years) — building controllers, routing, forms, and HTTP filters.
• Solid understanding of functional programming concepts and idiomatic Scala (e.g., immutability, monads, cats/Scalaz familiarity advantageous).
• Experience designing and consuming REST APIs, JSON validation/serialization (Play JSON, Circe).
• Experience with relational databases (PostgreSQL) and/or NoSQL (MongoDB), including schema design and query optimisation.
• Proven experience writing unit and integration tests (ScalaTest, Specs2, Mockito, etc.).
• Familiarity with build tools (sbt) and dependency management.
• Experience with Git and branching strategies.
• Good understanding of HTTP, web security best practices, and performance considerations.
• Experience working in Agile teams and participating in ceremonies.

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