Krzysztof Błażewicz
Product developer with a true passion for technology.
Summary
Product developer with over 8 years of professional experience. I’ve built high throughput, highly available distributed systems with industrial scale deployments. I’ve handled architecture design, implementation and deployment. Inspired teams into writing high quality, maintainable code.
Profiles
GitHub
LinkedIn
Experience
Indoorway
2019-08-01 - 2023-03-01
Lead Product Developer / DevOps Engineer
Delivered a robust cloud based system handling multiple industrial facilities owned by several Fortune 100 companies. * led the development of **GraphQL API** serving data from a **PostgreSQL** instance with more than **4 TB** of **time series** data using **asynchronous programming in Python** (from 3.6, up to 3.11) with full **typing** coverage * continuously improved and maintained over a dozen of production **Python** applications * independently managed **AWS cloud** with over 20 production services * built and managed a continuous monitoring solution consisting of **Zabbix**, **Graylog** and **Sentry** * completed product compliance verification process with several international corporations * personally administered **GitLab** instance for a 30-person company * managed employee permissions in **FreeIPA**, **Google Workspace** and **Azure AD** * prepared automations for code maintenance and deployment using **GitLab CI** * enforced unified **code standards** for software development by introducing automated code **linters** * conducted technical interviews with candidates from intern to senior levels * took part in the product development roadmap planning sessions * provided **mentoring** for over 15 developers, from interns to senior staff * prepared technology related **workshops** for technical and non-technical staff * provided technical support during **sales due diligence** process
Indoorway (formerly DaftCode division)
2017-05-01 - 2019-08-01
R&D Engineer
* designed and developed a scalable, **containerized microservice** system processing over **2 TB of data per month** interconnected with multi-node **RabbitMQ** cluster * build reusable **Python libraries** used in multiple production applications * built extensive and easily extendable automated **testing suites for Python** projects * prepared optimized **Docker images** for production services hosted on private **Gitlab Registry** * written firmware for **embedded** devices in **C** using **GCC** and automated build pipelines * assisted in **electronic circuit design** and component selection process * done **fast prototyping** of backend software for POCs * worked with IT administrators, backend and frontend developers to introduce new product features * built simple **IoT management system**, both backend and frontend sides * provided POCs and minor contributions to frontend applications in **TypeScript**
Education
Warsaw University of Technology
Master of Science • top 15%
Automatics and Robotics
2014-02-01 - 2015-06-30
I have finished the education with proposition for a PhD. I decided to pursue professional career instead and did not finish my thesis.
Warsaw University of Technology
Bachelor of Engineering • top 10%
Automatics and Robotics
2010-11-01 - 2014-02-01
Volunteering
Skills
Python
Senior
PostgreSQL
Advanced
RabbitMQ
Advanced
AWS
Proficient
Docker
Advanced
Devops
Proficient
Linux
Advanced
Administration, Provisioning
Networking
Proficient
UniFi, Mikrotik, EdgeOS, AWS VPC
C/Embedded
Advanced
Mentorship
Proficient
Other
TypeScript, JavaScript, Erlang, Go, Rust, Electronics, Industrial Automation, 3D Modeling
Interests
Aquariums
Currently owning a small Reef tank, had few freshwater tanks in the past.
Home Automation
I have Home Assistant, Node-RED, Grafana and few others running in Docker on a RPi 4 to add some "smartness" to my home.
3D Printing
I own an Ender 3 V2 running Marlin Firmware customized by myself. I model functional parts in Fusion 360.
Languages
Polish
Native
English
Proficient