Open to opportunities

Peter Berger

@peterberger

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Fullstack/Frontend engineer with strong QA and automation expertise.

Hungary

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What I'm looking for

I seek Senior Fullstack/Frontend or SDET roles where I can apply technical leadership, quality-first practices, and scalable architectures to deliver reliable, high-impact products.

I am a Fullstack and Frontend engineer with extensive QA and automation experience, delivering production features at organisations such as Microsoft Rare, Kingfisher, NHS, and Virgin Media. I combine hands-on React, React Native, Next.js, Node.js and .NET/C# development with 20 years of QA/automation expertise to produce robust, maintainable software.

I've improved performance and delivery through backend API work, frontend performance improvements, and automation frameworks (Playwright, Cypress, Selenium). I take pride in building scalable fullstack architectures and reliable test automation that reduces errors and accelerates delivery.

Experience

Work history, roles, and key accomplishments

Senior SDET

Virgin Media O2

Mar 2024 - Sep 2025 (1 year 6 months)

Contributed to React Native mobile and Angular web apps, delivered bug fixes and small features, acted as interim QA Lead, and built automation PoCs to accelerate delivery and improve stability.

React Native Angular Cypress Appium Test Automation CI CD JavaScript

Senior Software Engineer

NHS Digital

Dec 2021 - Mar 2024 (2 years 3 months)

Delivered C# backend fixes and web/mobile features for NHS services, owned a Python automation framework that improved efficiency by 25%, and supported pandemic-critical releases.

C++Python Postman)Automation Framework Backend Development CI CD Accessibility

Senior SDET / Hybrid Engineer

Qubit

Jan 2021 - Oct 2021 (9 months)

Developed ReactJS UI components and owned Cypress automation, improving personalization logic and reducing error rates by 30%.

ReactJS JavaScript Cypress Test Automation Frontend Development A B Testing QA Strategy

Backend Developer

Rare (Microsoft)

Jun 2020 - Jan 2021 (7 months)

Contributed .NET/C# APIs for Sea of Thieves, improving response times by 20% and implemented a new in-game bonus system handling large-scale data flows.

C# .NET API Development Performance Optimization Distributed Systems

Senior SDET / Frontend Contributor

Kingfisher

Mar 2019 - May 2020 (1 year 2 months)

Built custom React hooks and optimized UI in a 3D kitchen planning tool, delivered frontend PoCs and implemented JavaScript test automation to increase coverage by 40%.

ReactJS WebdriverIO Cypress Test Automation JavaScript UI UX