Oleksii Kvasnikov - Software developer (freelance)

Q: Where is Oleksii based?

Oleksii is based in Rottenburg, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Oleksii speak?

Oleksii speaks the following languages: Russian (Native), Ukrainian (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Oleksii have?

Oleksii has at least 9 years of experience. During this time, Oleksii has worked in at least 7 different roles and for 7 different companies . The average length of individual experience is 1 year and 3 months . Note that Oleksii may not have shared all experience and actually has more experience.

Q: What is Oleksii's latest experience?

Oleksii's most recent position is Software developer (freelance) at Sasse Elektronik GmbH .

Q: What companies has Oleksii worked for in recent years?

In recent years, Oleksii has worked for Sasse Elektronik GmbH , Intec GmbH , Seleon GmbH , and Deveritec GmbH .

Q: Which industries is Oleksii most experienced in?

Oleksii is most experienced in industries like Manufacturing , Automotive , and Telecommunication . Oleksii also has some experience in Healthcare and Education .

Q: Which business areas is Oleksii most experienced in?

Oleksii is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Oleksii also has some experience in Project Management and Research and Development .

Q: Which industries has Oleksii worked in recently?

Oleksii has recently worked in industries like Automotive , Manufacturing , and Healthcare .

Q: Which business areas has Oleksii worked in recently?

Oleksii has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Rottenburg, Germany

Experience

Mar 2025 - Jun 2025

4 months

Germany

Software developer (freelance)

Sasse Elektronik GmbH

Built custom Yocto Linux image with Docker support (NXP i.MX 6ULL)
Developed distributed Python application (web interface, gas/temp control)
Designed multiple docker containers for production and development
Wrote documentation per IEC 62304

Jun 2024 - Present

1 year 10 months

Germany

Project lead (freelance)

Intec GmbH

Defined firmware architecture using UML
Developed GUI and menu
Managed project tasks, deadlines and releases
Created developer infrastructure (cmake, ninja, docker, clang-tidy, clang-format, cppcheck, ruff, pre-commit, doxygen, GitLab CI)
Developed drivers and middleware for STM32, I2C, OLED and CANopen
Implemented external memory flash loader in C++ (FMC, JLink OFL)

Sep 2022 - Jan 2025

2 years 5 months

Leipzig, Germany

Software and Firmware Developer (freelance)

Seleon GmbH

Developed firmware for power management, battery charging, battery gas gauging, watchdog for multithreaded system and custom CAN protocol with 300 periodic messages
Performed system startup tests, runtime tests, unit tests and integration tests using C, Keil RTX RTOS, Vectorcast, Doxygen, Polyspace, STM32, ISO 62304
Developed Python app with Jinja templates to extract CAN message data from database and generate code for any programming language
Created Python tool to convert Keil project tree into cmake and Polyspace project structures
Established CI pipelines using Jenkins and GitLab CI

Sep 2020 - Sep 2022

2 years 1 month

Dresden, Germany

Software and Firmware Developer

Deveritec GmbH

Implemented car positioning on charging station using UWB in C++ and Python with Flask
Developed ROS modules for LiDAR-powered autonomous robot using C++ and Python
Created framework for robotic arm simulation and control using Python and MQTT
Developed firmware and software for end-of-line PCB verification using C++, Python, Flask, WebSocket, SQL, JS, CSS, HTML, Electron, TCP, RS485, CAN and BLE
Built tool for asynchronous firmware upgrade over CAN for 100+ devices using Python
Developed user-space Linux application to interact with custom camera driver in C++ on Yocto

Oct 2019 - Apr 2020

7 months

Dresden, Germany

Firmware Developer

CommSolid

Implemented LWM2M objects in C for NB-IoT enabled device
Developed C++ applications using Qt framework for Linux
Automated tests of NB-IoT modem using Bash and Python
Designed schematics and PCBs in Altium Designer

Jan 2019 - Apr 2019

4 months

Chemnitz, Germany

Research Assistant

Chemnitz University of Technology

Developed digital electronics using Target 3001

May 2015 - Oct 2017

2 years 6 months

Dnipro, Ukraine

Embedded Engineer

Noosphere

Developed firmware for STM32 using C in bare metal with STM HAL
Created software in C# on .NET Framework
Designed electrical circuits and routed PCBs in Altium Designer

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Manufacturing, Automotive, Healthcare, Telecommunication, and Education.

Manufacturing

Automotive

Healthcare

Telecommunication

Education

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, Project Management, and Research and Development.

Information Technology

Product Development

Quality Assurance

Project Management

Research and Development

Summary

I am an expert Embedded Systems Developer with a significant track record of delivering successful projects in mission-critical environments. Leading projects autonomously, with my own team, or as a fully integrated member of client teams, I specialize in MCU (bare metal/RTOS) and Linux (kernel/user space). My development expertise is complemented by implementation of robust test automation devices (HIL/EOL) and CI/CD pipelines to ensure exceptional quality and development velocity.

Skills

Programming C/c++: Very Good
Rust: Basic
Python: Very Good
Js/c#/dart: Basic
Windows
Linux
Git
Svn
Vscode
Eclipse
Jetbrains Ides
Altium
Solidworks

Languages

Russian

Native

Ukrainian

Native

German

Advanced

English

Advanced

Education

Sep 2017 - Apr 2021

Chemnitz University of Technology

Master, Embedded Systems · Embedded Systems · Chemnitz, Germany

Sep 2013 - Jun 2017

Dnipro National University

Bachelor, Telecommunications · Telecommunications · Dnipro, Ukraine

Statistics

Experience

Total positions 7

Experience in Manufacturing 6 y

Avg length 1 y 4 m

Longest experience 2 y 5 m

Global Experience

Countries worked in 2 (Germany, Ukraine)

Primary country Germany

Expertise

Recent roles Software developer (freelance), Project lead (freelance), Software and Firmware Developer (freelance)

Main industries Manufacturing, Automotive, Healthcare

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Master

Profile

Created

June 2025

Last Update

July 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Oleksii based?

Oleksii is based in Rottenburg, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Oleksii speak?

Oleksii speaks the following languages: Russian (Native), Ukrainian (Native), German (Advanced), English (Advanced).

How many years of experience does Oleksii have?

Oleksii has at least 9 years of experience. During this time, Oleksii has worked in at least 7 different roles and for 7 different companies. The average length of individual experience is 1 year and 3 months. Note that Oleksii may not have shared all experience and actually has more experience.

What roles would Oleksii be best suited for?

Based on recent experience, Oleksii would be well-suited for roles such as: Software developer (freelance), Project lead (freelance), Software and Firmware Developer (freelance).

What is Oleksii's latest experience?

Oleksii's most recent position is Software developer (freelance) at Sasse Elektronik GmbH.

What companies has Oleksii worked for in recent years?

In recent years, Oleksii has worked for Sasse Elektronik GmbH, Intec GmbH, Seleon GmbH, and Deveritec GmbH.

Which industries is Oleksii most experienced in?

Oleksii is most experienced in industries like Manufacturing, Automotive, and Telecommunication. Oleksii also has some experience in Healthcare and Education.

Which business areas is Oleksii most experienced in?

Oleksii is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Oleksii also has some experience in Project Management and Research and Development.

Which industries has Oleksii worked in recently?

Oleksii has recently worked in industries like Automotive, Manufacturing, and Healthcare.

Which business areas has Oleksii worked in recently?

Oleksii has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Oleksii's education?

Oleksii holds a Master in Embedded Systems from Chemnitz University of Technology and a Bachelor in Telecommunications from Dnipro National University.

What is the availability of Oleksii?

Oleksii is immediately available full-time for suitable projects.

What is the rate of Oleksii?

Oleksii's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.