Roman Pietrzak aka Yosh
Info for recruiters
Last update: 2020-05-12

This page covers all typical information asked by IT recruiters during initial conversation.
Please read whole this page BEFORE contacting me.

General Info

What I do

I'm Tech Lead, Lead Developer, Software Engineer with experience in full DDDD (Discover-Design-Develop-Deliver) process. I worked with variety of IT projects: web, embedded, cloud, mobile, desktop and some hardware design (PCB).
  • My specialities are:
    • full stack development (web dev):
      • JavaScript (including ES6), node.js
        • in past: PHP, ActionScript (Flash)
      • React/Vue/Angular, webGL, webSockets, Canvas, HTML 5, Stylus/CSS, nunjucks
      • dev-ops & cloud: Amazon AWS, docker, kubernetes, helm, Jenkins
      • web-on-desktop applications: Electron
    • automation - CI, dev-ops, SDET (Software Development in Test):
      • AWS, kubernetes, helm, docker, Jenkins
      • automation, jenkins, continous integration
      • TDD, jest, mocha, selenium, karma
    • embedded:
      • Digital TV (SetTopBox, IPTV, MPEG, DVB etc.) and IoT, ARM/Cortex/MIPS, linux, bare-metal
    • C/C++, QT+QML
    • obvious understanding of: git, svn, kanban, agile, scrum, jira, linux
    • also have significant experience with: Java, Python, VHDL (FPGA) and electronics (PCB design)
  • I'm experienced in integration of non-trivial cross-platform solutions:
    • example: React application connected to node.js API platform (with graphQL) on the AWS Cloud talking to IoT devices, embedded devices and desktop C++/Qt application
  • Coding language doesn't matter with my experience as I'm able to simply select best tools and best people for given task and lead the team to cover requirements. Or simply join existing team and project - and follow their rules.
  • Techs I'm good with (random order):
    KISS, C, C++, Java, PHP, JavaScript, ES5/ES6, CoffeeScript, node.js, Electron, Python, ActionScript, mySQL, SQL, Ajax, HTML 5, Websocket, HTML Canvas, WebGL, SVG, GLSL, CSS, CASS, Selenium, Qt, QML, XML, JSON, binary JSON, WinAPI, linux, drivers, embedded, networking, sockets, GDI, openGL, directX, blitter, vertex shader, pixel shader, GLSL, HDTV, STB (Set Top Box), DVB, ATSC,
    multi-threading, memory optimisation, defects identification/fixing (debugging), TDD, BDD, automated tests, continous integration, Agile, Scrum, Jira, Bugzilla, Sprint, Workflow, ISO

My team - Kemu Studio

In background, I lead Kemu Studio, a small team of independent developers:
  • we help companies with their software side of products:
    • we develop and maintain software for web, embedded, desktop apps, Digital TV (SetTopBox)
    • we help to identify and fix issues with both The Process and The Software itself
  • we have expertise in hardware design
  • we use a mix of on-site/remote way of working - in a very efficient way
  • we would be happy to work together as a team for your company!

Work I'm looking for #1 - software development roles in London

I'm happy to talk about:

  • Leading roles or roles where I'm expected to take ownership of the project, to get things done, being responsible for a whole thing in a long-term work
  • I'd be especially interested in cross-domain roles e.g. IoT or web-controlled embedded devices
  • Full-stack or embedded development


  • I provide my work through Kemu Studio Limited (UK registered) or Kemu Studio Poland (Poland registered). Paid by VAT invoices.
  • I can provide work on long-term, full-time contract, but I also provide part-time consultancy services

Perm jobs (salary based):

  • Generally, I don't work on salary basis, as this won't cover my expenses in tax efficient way.
  • as exception, I'm potentially interested in SDM (Software Development Manager) role, with salary of at least 130k GBP.


  • commutable from Staines, West London
    I'm mostly looking for contracts in London or around London (west). Places like Redding, Basingstoke are fine - in range.
    The rule is - the more days of Work-From-Home possible, the further I can go for the office.
  • remote work (may be partially remote, I can go to any place in the world for meetings once-twice a month or similar arrangement).
  • Poland

The Rate

The rate obviously depends on details of the role, range of responsibilities, location, company culture, project culture, way of working etc.
  • UK onsite: 500-700 GBP/day + VAT
  • remote roles starting from 400 GBP/day + VAT

Priority goes to

  • "take responsibility of something" roles and greenfield projects
  • Leading roles
  • Direct roles before agencies
  • Projects involving my team instead of just me

Work I'm looking for #2 - Off-shore site launch in Poland

I'd be happy to start and lead a development team/site in Poland for the company looking to expand offshore. This may be excellent opportunity for cost-effective employment of highly skilled people - effective growth for you company.

I did that before with success:
  • I was a part of initial startup team for medium-size Canadian company. (can't publish names here)
  • Also I worked for a number of companies as consultant in initial phase and during off-shore site launch. (can't publish names here)
...all of them succeeded!

Your project may be initially started as onsite work with location based in any place on Earth for few months to train/launch/startup, then moved to Poland.
Project team may be started from scratch or based on existing Kemu Studio team.
  • Details - Location
    I propose a west of Poland, 150k+ city called Zielona Gora (translated to: Green Hill) or Wroclaw. Close to Berlin, Poznan and Wroclaw - 3 big airports in range.
  • Benefit #1: People
    Local IT-job market in both Zielona Gora and Wroclaw is huge, with 1000's of candidates.
    There are excellent Universities and Technology Institutes producing trained graduates every year.
  • Benefit #2: Cost effective
    Simply, it's a cost effective place in the middle of Europe !
    Consider living there as 5-10 times cheaper than London. This means cost-effective office space, salaries and maintenance costs.
    Yet, it's EU standard compliant civilized place.
  • Details - Final
    If you're still reading this, you should probably call me :)

Service legals

I provide services through one of my companies
  • Kemu Studio Limited in UK - EU-VAT registered
  • Kemu Studio in Poland - EU-VAT registered


Sorry, I have high number of chit-chat-spam cold-calls and I need to defend my time.
Please DO NOT put my contact data into your database! Don't store my mobile number, nor email!
If you have a database of contacts - please save the link to this website ONLY and remove all other contact info.
  • email:
  • Skype: yosheeck
  • mobile:
    • UK mobile number: +44 79 234 05667 - preferred, I'm on Whatsapp with this number
    • PL mobile number: +48 500 241 830 - it's backup, please check the UK one first
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