mieczu.pl
PL

Piotr "Mieczu" Mieczkowski

Development. Quality Assurance. AI.

I build and test software that’s meant to last.

In software since 2008: from testing and automation, through frontend, to Flutter apps and AI. Day to day I’m a Technical Lead, and I’m open to working with you on new projects.

Let’s talk about your project See how I can help

mieczu build --app mobile

PASS development Flutter, Dart, Angular

mieczu test --all

FAIL 1 failed bug → lesson → regression test

mieczu test --failed

PASS quality test automation, CI/CD

mieczu deploy --prod

PASS deploy deployed to production

mieczu automate --ai

PASS ai agents, skills, LLMs

4 passed, 1 fixed, 0 regressions the same bug never comes back

Trusted by

Work with me

I work with clients through my company, Sanveware sp. z o.o. I can join your team, lead a project technically, or help with one specific area.

  • Development

    flutter run

    Mobile and web apps in Flutter and frontend in Angular – from architecture to release.

    • Cross-platform apps for Android, iOS and web
    • Architecture and existing code reviews
    • Technical Lead for a team or project

  • Quality Assurance

    flutter test

    Over a decade in QA and test automation. I help build a process where quality is part of development, not a separate phase.

    • Test strategy and QA process audits
    • Test automation: web, mobile, API
    • Testing in CI/CD

  • AI

    ollama run qwen3

    Practical use of AI in products and in how teams work: from AI agents, through skills, to language model integrations – where it delivers real value.

    • Building AI agents that carry out tasks on their own
    • Designing skills – ready-made capabilities and procedures for AI models
    • Integrating language models into applications
    • Local AI models on your own infrastructure

About

I’m a software engineer and Technical Lead. I started out in 2008 testing software, then moved on to test automation, frontend development and cross-platform apps in Flutter.

That path shaped how I work. As a tester I learned to look at software through the user’s eyes; as a developer, to build it so it’s reliable, testable and easy to maintain. Along the way I’ve made plenty of mistakes and learned from every one of them. I’m not infallible, but I don’t make the same mistake twice – a bit like good testing, where every bug you find becomes a test that makes sure it never comes back.

Today I lead one of the feature teams on the VIG3 project at Viessmann Climate Solutions. I combine hands-on Flutter development with technical leadership: mentoring, code reviews, architectural decisions and working with the Software Architect and other teams. I like staying close to the code while helping people grow.

What I value most in all of this is people. I’m at my best in a team where you can ask any question, have your own opinion and still play for the same side – no toxic atmosphere, no politics. I’m drawn to people with passions, because they’re the ones who make working together not just productive, but truly rewarding.

Career

  1. Viessmann Climate Solutions

    2018 – present8 yrs 5 mos

    1. 2025 – present Technical Lead / Flutter developer now

      Jun 2025 – present1 yr 5 mosWrocław, hybrid

      • Leading a feature development team within the VIG3 project, combining hands-on development with technical leadership.
      • Supporting team members’ growth through technical guidance, knowledge sharing and constructive code reviews.
      • Contributing to the evolution of the architecture and technical decisions for maintainability, scalability and consistency.
      • Working closely with the Software Architect, Scrum Master, Business Analysts and Tech Leads of other teams to align solutions and cross-team dependencies.
      • Defining and promoting coding standards, engineering best practices and a quality-focused process.
      • Supporting technical planning, estimation, risk identification and problem-solving.
      • Developing cross-platform mobile and web applications with Flutter and Dart.
      • Flutter
      • Dart
      • BLoC
      • Provider
      • REST API
      • Azure
      • Android
      • iOS
    2. 2024 – 2025 Flutter developer

      Oct 2024 – May 20258 mosWrocław, hybrid

      • Developing applications for Android, iOS and web as part of the VIG3 project.
      • Implementing features in Flutter and Dart with a focus on maintainable, testable code.
      • Managing application state with BLoC and Provider.
      • Integrating with backend services through REST APIs.
      • Code reviews, automated testing and continuous improvement of team practices.
      • Flutter
      • Dart
      • BLoC
      • Provider
      • REST API
      • Azure
      • Android
      • iOS
    3. 2024 Technical Lead / Frontend developer

      Feb 2024 – Sep 20248 mosWrocław, hybrid

      • Designing and defining the structure of the application.
      • Overseeing coding standards and code reviews so the code stays readable, scalable and maintainable.
      • Promoting unit, integration and E2E testing.
      • Providing technical support to the development team.
      • Sprint and project planning, estimation, identifying technical risks and proposing solutions.
      • Angular
      • TypeScript
    4. 2021 – 2024 Frontend developer

      Apr 2021 – Jan 20242 yrs 10 mosWrocław

      • ViGuide – desktop and mobile (PWA) app for Viessmann installers and technicians.
      • Workforce – desktop app for Viessmann factories.
      • TypeScript
      • Angular
      • Angular Material
      • RxJS
      • NgRx
      • WebSockets
      • .NET Core
    5. 2019 – 2021 JavaScript developer / Quality Assurance Specialist

      May 2019 – Apr 20212 yrsWrocław

      • Frontend development in Angular 8–10.
      • Monitoring projects in terms of process and QA practices.
      • Preparing, configuring and maintaining CI/CD (TeamCity).
      • Testing Angular, Node.js, MongoDB, WPF and .NET Core applications.
      • Test automation with Selenium (C#, .NET Core).
      • Tools to improve testing (Bash, PowerShell) and REST API testing (Postman).
      • Angular
      • C#
      • Selenium
      • TeamCity
      • Postman
    6. 2018 – 2019 Quality Assurance Specialist

      Jun 2018 – May 20191 yrWrocław

      • Monitoring projects in terms of process and QA practices.
      • Preparing, configuring and maintaining CI/CD (TeamCity).
      • Testing Angular, Node.js, MongoDB, WPF and .NET Core applications.
      • Tools to improve testing (Bash, PowerShell) and REST API testing (Postman).
      • C#
      • Selenium
      • TeamCity
      • Postman

  2. intive

    2016 – 20182 yrs 5 mos

    1. 2017 – 2018 Senior QA Test Automation

      May 2017 – May 20181 yr 1 moWrocław

      • Consulting on environments, tools and methodologies for internal and external QA customers.
      • Mobile test automation (regression and smoke): SeeTest and Xamarin in C# (iOS, Android), Espresso and UIAutomator in Java (Page Object Pattern).
      • Test cases (TestRail, Zephyr), result reporting, bug management in JIRA.
      • CI with Jenkins and Bamboo, working in Scrum.
      • Taking part in QA recruitment.
      • C#
      • Java
      • Appium
      • Espresso
      • Xamarin
      • Jenkins
      • Bamboo
    2. 2016 – 2017 QA Test Automation

      Jan 2016 – May 20171 yr 5 mosWrocław

      • Mobile test automation (regression and smoke) with SeeTest, Xamarin, Espresso and UIAutomator.
      • Test cases (TestRail, Zephyr), result reporting, bug management in JIRA.
      • CI with Jenkins and Bamboo, Git and Bitbucket, Scrum.
      • C#
      • Java
      • Espresso
      • Xamarin
      • Jenkins

  3. Santander Consumer Bank

    2012 – 20153 yrs 11 mos

    1. 2012 – 2015 Software QA Tester

      Feb 2012 – Dec 20153 yrs 11 mosWrocław

      • Developing and maintaining QTP and Selenium automated test scripts.
      • Testing banking applications (front-end and back-end).
      • Tools to improve the testing process and QA documentation.
      • Working with MS SQL databases and testing SQL scripts.
      • Selenium
      • QTP
      • MS SQL

  4. CUBE.ITG

    2010 – 20111 yr 2 mos

    1. 2010 – 2011 Software Tester / C# .NET developer

      Nov 2010 – Dec 20111 yr 2 mosWrocław

      • Test plans and test cases (UAT, regression), bug management in TFS, user guides.
      • Test automation (Badboy).
      • Web developer on a CRM project (C# .NET), working with MS SQL.
      • C#
      • .NET
      • MS SQL
      • TFS

  5. Crédit Agricole CIB

    2009 – 20101 yr 10 mos

    1. 2009 – 2010 Software QA Tester

      Jan 2009 – Oct 20101 yr 10 mosWrocław

      • Testing banking applications (front-end and back-end).
      • Test plans and test cases (UAT, regression, functional), result reporting.
      • Working with MS SQL and Oracle databases and AS/400 (VisionPLUS).
      • Simplifying the test process.
      • MS SQL
      • Oracle
      • AS/400
      • JIRA

  6. Future Solutions

    2008 – 20094 mos

    1. 2008 – 2009 Software Tester

      Oct 2008 – Jan 20094 mosWrocław

      • Writing test cases and testing web applications.
      • Reporting and verifying bugs, reporting test results.

Skills

Mobile and cross-platform

  • Flutter
  • Dart
  • BLoC
  • Provider
  • Android
  • iOS
  • REST API
  • Azure

Frontend

  • Angular
  • TypeScript
  • RxJS
  • NgRx
  • Angular Material
  • PWA
  • WebSockets

Quality and automation

  • Unit, integration and E2E testing
  • Selenium (C#)
  • Appium
  • Espresso, UIAutomator
  • Xamarin, SeeTest
  • Postman
  • TestRail, Zephyr

Leadership and process

  • Team leadership
  • Mentoring and code review
  • Architectural decisions
  • Estimation and risk analysis
  • CI/CD: TeamCity, Jenkins, Bamboo
  • Scrum

Outside of code

Motorcycles

I’m an avid motorcycle rider – for me, the road is the destination. I regularly train on track, and what I enjoy most is gymkhana, where precision, technique and full control of the bike are everything.

Sport

Cycling, swimming and skiing – sport gives me energy and balance. I used to train judo; today I follow it closely as a fan.

Making things

I like getting my hands on tools: woodwork, electrics, plumbing. Building something from scratch and checking that it really works.

Films and crime fiction

I value good cinema and crime novels – stories where you have to connect the facts and get to the bottom of things. A bit like debugging.

Wildlife

Along the way I met the people who run Puchaczówka today – a wildlife rehabilitation centre. A shared passion and care for animals mean that today I serve on the foundation’s board.

Contact

Have a project in development, testing or AI? Get in touch and I’ll suggest how I can help.

kontakt@mieczu.pl