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I am a results-driven telecom test engineer with over 15 years of hands-on experience in mobile device testing, certification, and field trials across major UK operators. I specialize in 5G, LTE, VoLTE, and IMS validation, with a proven ability to diagnose complex issues, drive cross-functional collaboration, and ensure high-quality network performance in fast-paced Agile environments. In my roles, I have delivered rigorous pre-operator acceptance testing, firmware validation, and comprehensive test documentation, translating technical findings into clear validation summaries for operator approvals. I thrive on working with vendors, engineers, and product teams to validate features and accelerate device certification cycles.…I am a results-driven telecom test engineer with over 15 years of hands-on experience in mobile device testing, certification, and field trials across major UK operators. I specialize in 5G, LTE, VoLTE, and IMS validation, with a proven ability to diagnose complex issues, drive cross-functional collaboration, and ensure high-quality network performance in fast-paced Agile environments. In my roles, I have delivered rigorous pre-operator acceptance testing, firmware validation, and comprehensive test documentation, translating technical findings into clear validation summaries for operator approvals. I thrive on working with vendors, engineers, and product teams to validate features and accelerate device certification cycles.

Seelan Poothathamby

QA Engineer, Project Manager, Content Creator, +6

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I am a results-driven telecom test engineer with over 15 years of hands-on experience in mobile device testing, certification, and field trials across major UK operators. I specialize in 5G, LTE, VoLTE, and IMS validation, with a proven ability to diagnose complex issues, drive cross-functional collaboration, and ensure high-quality network performance in fast-paced Agile environments. In my roles, I have delivered rigorous pre-operator acceptance testing, firmware validation, and comprehensive test documentation, translating technical findings into clear validation summaries for operator approvals. I thrive on working with vendors, engineers, and product teams to validate features and accelerate device certification cycles.…I am a results-driven telecom test engineer with over 15 years of hands-on experience in mobile device testing, certification, and field trials across major UK operators. I specialize in 5G, LTE, VoLTE, and IMS validation, with a proven ability to diagnose complex issues, drive cross-functional collaboration, and ensure high-quality network performance in fast-paced Agile environments. In my roles, I have delivered rigorous pre-operator acceptance testing, firmware validation, and comprehensive test documentation, translating technical findings into clear validation summaries for operator approvals. I thrive on working with vendors, engineers, and product teams to validate features and accelerate device certification cycles.

Available to hire

I am a results-driven telecom test engineer with over 15 years of hands-on experience in mobile device testing, certification, and field trials across major UK operators. I specialize in 5G, LTE, VoLTE, and IMS validation, with a proven ability to diagnose complex issues, drive cross-functional collaboration, and ensure high-quality network performance in fast-paced Agile environments.

In my roles, I have delivered rigorous pre-operator acceptance testing, firmware validation, and comprehensive test documentation, translating technical findings into clear validation summaries for operator approvals. I thrive on working with vendors, engineers, and product teams to validate features and accelerate device certification cycles.

Skills

Experience Level

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Wireless Test Engineer at Dekra UK / Telefónica O2 Slough

August 1, 2023 - Present

Conduct VoLTE, IMS, 5G and mobile network testing for pre-integrated devices. Support firmware validation and network performance verification for device certification. Utilize chipset logging tools to identify, document, and track defects through Jira. Collaborate with vendors and internal teams for defect resolution and fix validation. Produce detailed test reports and validation summaries for operator approval.

User Acceptance Test Engineer at Sky UK

March 1, 2021 - August 1, 2023

Executed end-to-end, regression, and exploratory testing across Sky’s set-top box and mobile platforms. Validated mobile app functionality and performance across multiple devices and platforms. Performed issue investigation, defect management, and test documentation in Agile sprints. Delivered clear reporting and stakeholder updates on test outcomes.

Application Test Engineer at Hutchison 3G (Three UK)

November 1, 2011 - June 1, 2020

Validated VoLTE, LTE, and IMS features across multiple device vendors. Coordinated with Accenture test teams for plan execution, progress tracking, and validation reporting. Supported new handset launches, gate reviews, and feature readiness assessments. Delivered KPI reports summarizing defect trends and overall test quality.

Application Test Engineer at Vodafone UK

August 1, 2009 - October 1, 2010

Conducted device functionality and firmware validation per Vodafone requirements. Tested Vodafone 360 applications, multimedia, and social networking integrations. Reported bugs via HP Quality Center and collaborated with developers for defect resolution.