Scala Backend Engineer | Scalable APIs & Play Framework

Stealth iT Consulting; United Kingdom; On-site; GBP 50,000 - 70,000; Full time

Job summary

A consulting firm in the UK is seeking a Scala Developer to join their engineering team. The role involves designing and developing scalable, high-performance applications, working with modern distributed systems, and collaborating with cross-functional teams in an Agile environment. The ideal candidate has strong experience with Scala and Play Framework, and a solid understanding of REST APIs and relational databases. This full-time position offers opportunities to contribute to enterprise-grade solutions.

Qualifications

• Minimum of 3+ years of professional experience with Scala.
• Hands-on experience with Play Framework for over 2 years.
• Understanding of functional programming concepts.

Responsibilities

• Design, develop and maintain APIs using Scala and Play Framework.
• Write automated tests and support test automation.
• Collaborate in an Agile environment with cross-functional teams.

Skills

Scala

Play Framework

REST APIs

PostgreSQL

JSON validation

Agile methodologies

Tools

sbt

ScalaTest

Git

Job description

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.