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Senior Software Engineer – Test Automation

Job in Plymouth, Devon, PL2, England, UK
Listing for: One Identity, LLC
Full Time position
Listed on 2026-07-15
Job specializations:
  • Software Development
    DevOps, Backend Developer, Cloud Engineer - Software, Software Testing
Job Description & How to Apply Below

Overview

One Identity's One Login team is seeking Senior Software Engineer
s who operate with high ownership, strong technical judgment, and a bias for action. These roles are designed for engineers who identify and solve problems proactively — not just execute assigned work.

Senior Engineers at One Login are expected to operate as T-shaped engineers: deep in a primary domain while remaining capable across the stack (backend, APIs, cloud, and operations). You will play a key role in maintaining product velocity, improving system reliability, and reducing operational burden.

This is a hands‑on role that includes on‑call responsibilities and requires a strong commitment to modern engineering practices, including AI‑augmented development. We are looking for engineers who take full ownership — design, build, test, deploy, and operate — rather than handing work off between silos. In this role, you will focus on designing and evolving testing strategy and automation systems that maximize confidence while minimizing feedback time — eliminating manual QA dependency and improving release safety at scale.

Responsibilities

Eliminate manual QA dependency and build scalable automated testing
  • Design and evolve test architecture and tooling that scales across services and teams
  • Design and implement end‑to‑end, integration, and API test automation
  • Own test strategy across services — determine what to test, where to test it (unit vs integration vs E2E), and how to maximize signal while minimizing runtime
  • Improve CI/CD confidence and release safety while increasing deployment velocity
  • Reduce regression risk through targeted, high‑value test coverage rather than brute‑force test expansion
  • Own test reliability — proactively detect, diagnose, and eliminate flaky or low‑signal tests
Ideal Experience
  • Experience with modern test frameworks (Playwright, Cypress, or similar)
  • Strong understanding of testing strategy across layers (unit, integration, API, E2E) and when to apply each
  • Experience optimizing test suites for speed vs coverage (e.g., test selection, parallelization, flake reduction)
  • Experience integrating tests into CI/CD pipelines with a focus on fast feedback loops
  • Experience using AI tools to accelerate testing workflows, including:
    • Using AI to generate, prioritize, and optimize test coverage based on risk and system behavior
    • Analyzing test failures and flaky patterns at scale using AI‑assisted tooling
    • Accelerating test maintenance, refactoring, and gap detection
  • Ability to use data (incidents, logs, usage patterns) to continuously refine and prioritize test coverage
  • Experience with API and contract testing
Qualifications Software Engineering
  • 4+ years of professional software engineering experience with ownership of features, quality, or system-level initiatives.
  • Strong backend development experience (Ruby, Node.js, or similar).
  • Solid understanding of REST APIs, service contracts, and software design principles.
  • Experience working across backend services, APIs, and production systems.
Quality Engineering
  • Experience designing and maintaining automated tests across unit, integration, and end-to-end levels.
  • Familiarity with modern testing frameworks (e.g., Playwright, Cypress).
  • Strong ownership of code quality, debugging, and testing strategy, balancing coverage, reliability, and execution time.
Cloud & Production Systems
  • Experience building and operating services in AWS or similar cloud environments.
  • Good understanding of cloud-native and distributed systems (microservices, scalability, resilience).
  • Experience with CI/CD, production debugging, observability tools (e.g., Datadog), and incident response.
On-Call & Reliability
  • Willingness to participate in a mandatory 24/7 on‑call rotation.
  • Experience responding to production incidents and contributing to reliability improvements and postmortems.
AI-Assisted Development
  • Experience using, or strong interest in, AI-powered development tools (e.g., Git Hub Copilot, ChatGPT, Cursor).
  • Ability to review and validate AI-generated code and suggestions.

One Identity is an Equal Opportunity Employer and Prohibits Discrimination and Harassment of Any Kind:
One Identity is committed to the principle of equal…

Position Requirements
10+ Years work experience
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