Software Development Engineer in Test; SDET

At Commify, we're not just a company, we're a globally connected team of innovators who love what we do. As a CPaaS leader with 25 years of ground breaking experience, we're the force behind over 7 billion customer interactions each year, enabling businesses worldwide to connect via advanced channels like SMS, RCS, and complex mobile journeys.

Our culture is our core strength. Operating across the UK, EMEA, the USA, and Australia, we've fostered a truly diverse and connected environment, earning a consistent 4 out of 5 culture score in our employee engagement surveys. You'll join a vibrant team where your diverse experience makes a daily global impact.

We need talented people to grow a global company where everyone feels proud to belong, have a purpose and do their best to directly shape the digital future.

We are currently seeking a talented Software Development Engineer in Test (SDET) to join our team  an SDET, you will play a critical role in ensuring the quality and reliability of our software products through the development and execution of automated tests.

At Commify, we pride ourselves on our strong culture of collaboration, innovation, and continuous improvement. If you are passionate about quality assurance and want to contribute to the success of our platform, we would love to hear from you.

• Develop and execute automated tests across evolving platforms based on client needs and market trends.
• Test internal APIs for ETL of customer data into CPaaS and develop automated tests for new public API implementations matching existing contracts.
• Understand messaging product data models to ensure correct ETL via internal APIs.
• Plan and strategize testing, maintain traceability matrices, and collaborate with Product Owners to refine acceptance criteria, test plans, and scripts.
• Participate in operational discussions, design and deploy automated performance tests, and work with teams to align tests within the agile testing pyramid.
• Monitor and resolve automated test failures promptly as part of CI, balance development and execution of tests, and contribute to group Test Practice improvements.

• Strong SQL, data, and communication skills.
• Experience testing APIs using tools like Postman/Insomnia and writing automated tests with NUnit, Spec Flow, or Playwright.
• Experience in automated testing within loosely coupled, queue-based software systems and strong exploratory testing skills.
• Familiarity with agile methodologies (TDD, BDD, Scrum, Kanban) and defect tracking tools (JIRA, TFS, Bugzilla, ALM).
• Proficient in C#, test techniques, regression testing, time management, and support call triage.

• Experience in Dev Ops teams, cloud testing (VSTS, Azure, AWS), transactional messaging, API and ETL testing.
• Knowledge of version control (GIT), BDD principles, test automation frameworks, CI tools (Jenkins, Circle One, Azure Dev Ops).
• Ability to prioritize test automation efforts with ROI understanding and experience in operational requirements testing (resilience, performance, security).

• Competitive Salary £45 - 55,000
• Company Bonus Scheme based on performance
• Private Healthcare & Dental
• 27 days annual leave plus Bank Holidays
• Birthday off work
• Wellbeing days off and giving back days
• 5% employer pension contribution
• Death in service (4x salary)
• Access to "Calm" a wellbeing and mental health app for you and your family
• £350 Holiday voucher
• Monthly/quarterly socials
• Training & Development opportunities
• Hybrid working