Christian Manna Guimma - Senior SDET & QA Engineer with 6+ years experience in test automation
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Hey, I'm Chris

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Senior {SDET & QA Engineer} AWS & ISTQB Certified_

<p>6+ years building reliable, scalable quality practices for complex software systems. I solve hard problems where reliability, data integrity, and user trust matter most. Expert in test automation, CI/CD integration, API testing, and AI-assisted testing. PhD researcher focused on testing autonomous systems.</p>

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Years Experience

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Test Cases Automated

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CI/CD Pipelines Built

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Avg Test Coverage

Git Journaling
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Services

Designing SmartAutomation Solutions
to your requirements

Test Automation Engineering

Designing and maintaining scalable test automation frameworks for web and APIs using Playwright, Selenium, and Pytest. Built for reliability, maintainability, and long-term growth.

Workflow Automation for Teams

Automating end-to-end engineering workflows, including testing, releases, data setup, environment checks, and reporting, to reduce manual effort and accelerate delivery.

API & System Automation

Automating validation of business logic, data flows, and system integrations across distributed systems to ensure stability beyond the UI layer.

CI/CD Automation & Quality Gates

Embedding automated tests and quality gates into CI/CD pipelines using Jenkins, GitHub Actions, or Buildkite to enforce quality on every code change.

AI-Driven Automation & Intelligent Testing

Applying AI-assisted automation to optimise test coverage, analyse logs, detect anomalies, and support smarter release decisions.

Test Strategy & Automation Consulting

Defining automation roadmaps, test strategies, and quality metrics to help teams scale automation, reduce defect leakage, and mature QA practices.

Focused on automation that removes manual bottlenecks and scales engineering teams.
Available for senior automation, SDET, and AI-driven workflow automation engagements. Let’s talk.

Experience

+6years of experiencein Automation
Engineering and testing

QA Engineer
  • Architected and built an enterprise-grade E2E test automation framework from the ground up using Python, Playwright, and Pytest with Allure reporting
  • Reduced manual regression testing by 60% through comprehensive multi-layered test suites covering smoke, E2E, and UI tests integrated into CI/CD pipelines
  • Improved test execution time by 40% by implementing parallel test execution and efficient test data management strategies
  • Built and maintained 2,500+ automated test cases covering API, UI, and integration scenarios with 70%+ test coverage
  • Developed financial processing system test coverage including transaction management, batch processing, and multi-tier approval workflows
  • Collaborated with cross-functional teams to establish quality gates, reducing production defects by 45% year-over-year
PythonPlaywrightPytestFlaskAllureGitHub Actions

Certificates

  • AWS Certified Cloud Practitioner

    Amazon Web Services (AWS)

  • ISTQB Certified Tester

    Foundation Level (CTFL)

  • ISTQB Agile Tester

    Foundation Level Extension

  • ISTQB Test Automation Engineer

    Advanced Level

  • ISTQB Performance Testing

    Foundation Level

  • ISTQB AI Testing

    Foundation Level

Education

  • Bradford University

    PhD in Robotics and Autonomous Systems

  • Anglia Ruskin University

    MSc Computer Science (Distinction)

  • Catholic University

    BSc Computer Science (Distinction)

  • Harvard University

    HarvardX: CS50's Introduction to Programming with Python

  • Action Tutoring

    Maths Lecturer

Researched

  • Testing and Validation of Autonomous Systems

    Conducted research on simulation-based testing, risk-driven validation.

  • AI-Enhanced intrusion detection device for secure vehicular AD HOC

    Patented an AI-driven intrusion detection device designed to secure vehicular ad-hoc.

  • Automated Test Generation for Safety-Critical Systems

    Developed AI-driven frameworks for generating comprehensive test suites for autonomous vehicle systems.

Projects

My Recent Works

Enterprise E2E Test Automation Framework - Financial Processing System dashboard with real-time analytics

Enterprise E2E Test
Automation Framework

Built a complete enterprise-grade test automation solution from the ground up, featuring a Financial Processing System with multi-layered testing covering smoke, E2E, and UI test suites.

  • Project Info
  • Type

    Full-Stack Test Automation

  • Test Coverage

    25 tests across 3 test layers

  • Technologies

    Python, Playwright, Pytest, Flask, Allure

AI-Powered Test Data Generator - Python tool interface showing AI-generated test data for microservices

AI-Powered Test
Data Generator

Developed a Python-based, AI-assisted synthetic data generator producing deterministic, schema-valid datasets with full referential integrity across microservices.

  • Project Info
  • Type

    Automation Tool / AI Integration

  • Impact

    85% reduction in test data setup time across microservices

  • Technologies

    Python, Pydantic, Pytest, FastAPI, Faker

My Skills

  • Test Automation:

    Playwright, Selenium, Pytest ...
  • Languages:

    JavaScript, Python, TypeScript ...
  • Web & APIs:

    HTML, CSS, React, REST ...
  • CI/CD & DevOps:

    Git, Jenkins, Docker, AWS ...
  • Quality & AI:

    Test Strategy, Release Readiness ...
Watch & Learn

Hands-On QA & Automation Tutorials

Practical insights on test automation, CI/CD pipelines, and quality engineering strategies

Building Scalable Playwright Frameworks

Learn how to structure a production-ready Playwright automation framework with best practices.

Integrating Tests into CI/CD Pipelines

Step-by-step guide to embedding automated tests in your deployment pipeline with GitHub Actions.

AI-Powered Test Automation

Explore how to leverage AI for smarter test generation, maintenance, and result analysis.

Let's connect

Phone Number
+447510555294
Email
contact@christianguimma.com
YouTube
@christianguimma
Location
London, NW10 6FX