Software Engineer in Test (SDET)

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Software Developer in Test (SDET) | Software Development Firm | London, Hybrid

Our client builds technology that supports public sector organisations in managing complex regulatory and operational challenges at scale.

Backed by recent investment, they are growing fast – expanding internationally, strengthening their platform, and investing heavily in their people and ways of working.

This is an opportunity to join a purpose‑driven organisation at a pivotal stage, where you can have real impact and help shape what comes next.

In this hands‑on engineering role, you will lead and define testing standards within a new product team (4 engineers plus a Product Manager).

You will contribute to transformation projects, including rewriting and re‑architecting a core product with zero downtime for customers.

You’ll write and maintain code, take part in code reviews, and embed quality across the CI/CD and release processes.

London, Hybrid Working – with visits to the Head Office when needed (Greater London)

Competitive Base + Benefits Package

Key Responsibilities

  • Own the end‑to‑end test strategy for your team, setting a high bar for quality and reliability.
  • Design, build, and maintain automated test suites (unit, integration, end‑to‑end) and test tooling.
  • Work closely with engineers and product to define acceptance criteria and ensure testability.
  • Improve and operate CI/CD pipelines, including test automation, quality gates, and release confidence.
  • Support delivery of re‑platforming work on legacy systems, balancing risk and speed pragmatically.
  • Drive continuous improvement through metrics, root‑cause analysis, and prevention‑focused practices.

Requirements

  • Proven experience writing automated tests and designing approaches to ensure high quality.
  • Experience building and running CI/CD pipelines.
  • Comfortable working with complex, sometimes confusing legacy applications.
  • Experience designing and delivering high‑quality software in modern engineering teams.
  • Clear views on how to test software effectively; “strong opinions, weakly held”.
  • Good communication skills and the ability to collaborate across disciplines.

#J-18808-Ljbffr”, “datePosted”: “2026-04-21”, “hiringOrganization”: { “@type”: “Organization”, “name”: “SGI”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__409232260__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “London” } } }
Company: SGI
Apply for the Software Engineer in Test (SDET)
Location: London
Job Description:

Software Developer in Test (SDET) | Software Development Firm | London, Hybrid

Our client builds technology that supports public sector organisations in managing complex regulatory and operational challenges at scale.

Backed by recent investment, they are growing fast – expanding internationally, strengthening their platform, and investing heavily in their people and ways of working.

This is an opportunity to join a purpose‑driven organisation at a pivotal stage, where you can have real impact and help shape what comes next.

In this hands‑on engineering role, you will lead and define testing standards within a new product team (4 engineers plus a Product Manager).

You will contribute to transformation projects, including rewriting and re‑architecting a core product with zero downtime for customers.

You’ll write and maintain code, take part in code reviews, and embed quality across the CI/CD and release processes.

London, Hybrid Working – with visits to the Head Office when needed (Greater London)

Competitive Base + Benefits Package

Key Responsibilities

  • Own the end‑to‑end test strategy for your team, setting a high bar for quality and reliability.
  • Design, build, and maintain automated test suites (unit, integration, end‑to‑end) and test tooling.
  • Work closely with engineers and product to define acceptance criteria and ensure testability.
  • Improve and operate CI/CD pipelines, including test automation, quality gates, and release confidence.
  • Support delivery of re‑platforming work on legacy systems, balancing risk and speed pragmatically.
  • Drive continuous improvement through metrics, root‑cause analysis, and prevention‑focused practices.

Requirements

  • Proven experience writing automated tests and designing approaches to ensure high quality.
  • Experience building and running CI/CD pipelines.
  • Comfortable working with complex, sometimes confusing legacy applications.
  • Experience designing and delivering high‑quality software in modern engineering teams.
  • Clear views on how to test software effectively; “strong opinions, weakly held”.
  • Good communication skills and the ability to collaborate across disciplines.

#J-18808-Ljbffr…

Posted: April 21st, 2026