Developer - Scala

hackajob is partnering directly with Sage to hire for this role.

We are looking for a Backend Developer to join our HCM Localisation engineering team and help evolve a large-scale, cloud-based enterprise product. This role is focused on building and maintaining scalable backend services supporting complex product workflows, integrations, performance improvements, and ongoing platform modernisation.

*** Please note: This is a hybrid role requiring 3 days per week in our Newcastle office ***

In this role you'll:

Design, develop, and maintain robust backend services using Scala 2.13 and Play Framework in a Pekko-based environment.

Build clean, testable, and maintainable code using functional programming principles, immutability, pattern matching, and asynchronous programming with Futures.

Work with MySQL to design efficient data access patterns, optimize queries, tune indexes, and profile database performance.

Develop, deploy, and support services in AWS, working closely with DevOps and platform teams to ensure reliable delivery.

Contribute to CI/CD pipelines, Git-based pull request workflows, code reviews, and engineering best practices.

Collaborate with frontend engineers, QA, product owners, solution designers, and other backend developers to deliver high-quality product increments.

Support production stability by investigating issues, improving observability, and continuously reducing technical debt.

Required Skills and Experience:

Professional backend development experience, ideally in enterprise, SaaS, or cloud-based product environments.

Strong hands-on experience with Scala, including collections, Futures, immutability, pattern matching, error handling, and clean functional design.

Commercial experience with Play Framework or comparable JVM backend frameworks; Pekko or Akka experience is highly relevant.

Strong understanding of relational databases, especially MySQL, with practical knowledge of SQL optimization, indexes, query profiling, and transaction behaviour.

Experience using Redis or similar technologies for caching, session handling, or performance-sensitive workloads.

Deep understanding of OOP principles, functional programming, concurrency, the Scala type system, and advanced architectural pa...