cmg.Christian Manna
Guimma

Christian
Manna Guimma.

Senior SDET & QA Lead

I’m a London-based Software Development Engineer in Test (SDET) and QA Lead. I build test automation frameworks, lead quality assurance and research reliable AI and autonomous systems.

Explore my work Download CV
Christian Manna Guimma
London, United KingdomMeet me on LinkedIn

Advisory Board of Emerging Leaders 2026

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Selected work.

Automation, test data and simulation. Built to be useful.

Explore GitHub

Enterprise E2E
Automation Framework

A financial workflow, tested from end to end.

A complete financial processing application and its automation framework. Tests follow transactions through approvals, batch processing and settlement, with checks at the UI, API and database layers.

  • Python
  • Playwright
  • Pytest
  • Flask
  • Allure
Explore the project
Architecture & approach

Domain builders create test data; API adapters and database assertions validate business rules; Playwright checks browser workflows. GitHub Actions runs the checks and Allure captures the evidence.

A workflow, tested in layers.

Financial processing · Portfolio example

  1. TransactionCreate & validate
  2. BatchGroup & submit
  3. ApprovalWhen required
  4. SettlementProcess & record

Explore the test coverage

Verify the business rules

Flask test client

Drive batch lifecycles through API adapters, including standard and senior approvals, rejection and cancellation.

tests/e2e/test_batch_processing.py

GitHub ActionsAllure reports

AI-Powered
Test Data Generator

Deterministic, schema-valid synthetic datasets with referential integrity across microservices.

Approximately 85% less test-data setup time.

  • Python
  • Pydantic
  • FastAPI
  • Faker
Explore the approach

The AI-Powered Test Data Generator combines schema validation with controlled data generation to produce repeatable datasets. This project is described in my CV; the source code is not currently publicly accessible.

Autonomous Systems
Validation

Simulation-driven validation in CARLA, generating rare, high-risk scenarios for autonomous systems.

Over 50% increase in edge-case discovery.

  • CARLA
  • Genetic algorithms
  • Simulated annealing
Explore the approach

Search-based scenario generation explores boundary conditions and fail-safe behaviour. This work forms part of my doctoral research in Robotics & Autonomous Systems at the University of Bradford, currently on hold.

My approach

From testability at the design stage to evidence at the release gate.

Automation architecture

Maintainable Playwright and Python frameworks across UI, API and integration layers.

Release confidence

CI/CD quality gates, contract testing and reliable feedback that reaches engineers sooner.

AI-assisted quality

Synthetic test data, exploratory agents and validation strategies for intelligent systems.

Research &
publications.

Published work on explainable AI, cybersecurity
and responsible autonomous systems.

3 publications
2026
3 papers

Published in Scriptora International Journal of Research and Innovation. Titles link to the publisher’s article pages and full-text access.

Experience.

Building frameworks, leading teams and improving how software reaches production.

Download full CV

Entertainment Partners

Apr 2022 — Present

SDET / QA Lead

Owning automation architecture and release quality for complex financial workflows. Built Playwright frameworks, introduced API contract testing and embedded quality gates in CI/CD.

Regression reliability above 90%; feedback reduced from 30 minutes to under 10.

Hi-Tech Plus

Mar 2021 — Feb 2022

Senior Software Test Engineer

Designed modular automation frameworks and API validation strategies, connecting reliable checks to the delivery pipeline.

Reduced test runtime by approximately 35% through parallel execution.

Brainnest

Feb 2020 — Mar 2021

Test Automation Engineer

Built Selenium and Pytest frameworks, expanded API coverage and mentored junior engineers in debugging and automation.

Increased test coverage by approximately 40%.

Diakrino Limited

Jul 2018 — Sep 2019

Associate SDET

Introduced regression automation and structured exploratory testing, working closely with developers on root-cause analysis.

Reduced manual testing effort by approximately 35%.

Career outcomes and project impact are drawn from my CV.

Education & credentials

Education

  • Robotics & Autonomous Systems, PhDUniversity of Bradford · On hold
  • Computer Science, MScAnglia Ruskin University · Distinction
  • Financial Engineering, MScWorldQuant University
  • Computer Science, BScCatholic University of Buea · First Class

Professional certifications

ISTQB

Foundation Level · Test Automation Engineering · Technical Test Analyst · Test Analyst · Performance Testing · Security Testing · Mobile Application Testing · AI Testing

View certification record

Amazon Web Services

Cloud Practitioner · Developer · Solutions Architect

DevOps Engineer certification in progress.

Notes from the work.

Practical perspectives on automation, testing and software engineering.

Visit my YouTube channel

Good work starts
with a conversation.

Have an engineering challenge, an opportunity
or a research question? Let’s talk.

guimmamanna@gmail.com
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Based in London, United Kingdom
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