Łukasz Żarnowiecki

OSKAR Sp. z o.o. | 2021 November — current

• Designing cloud native application targeting AWS
• Providing developers implementation guidelines in form of flow charts, UML and diagrams
• Deploying and maintaining infrastructure on AWS
• Writing some Python code
• Gathering business requirements and forging it into technical requirements 
• Implementing CI & CD pipelines
• Creating and maintaining on-premises k8s cluster (k3s)

Self-employed/freelancing | 2020 August — current

• Creating private cloud infrastructure
• Migrating client from per customer virtual machine to kubernetes cluster, saving money and time (full gitops)
• Server administration (deploying apps, monitoring, dealing with network issues)
• SPA Blog based on React and GraphQL, SEO optimized (github.com/dolohow/polishline)
• Maintaining Ultra Kernel Same Page Mergin (github.com/dolohow/uksm)

Institute of Biotechnology and Molecular Medicine | 2023 July — December

• Setting up Kubernetes cluster
• Managing GitLab Instance
• GitLab CI/CD for projects
• Writing API code in FastAPI
• Architecting API, workers and AI model to work together in scalable way (s3 events and redis as queue)
• Providing guidance and code review

DevsData LLC | 2020 October — 2023 September

• Interviewing Python, Go, JavaScript and SQL developers from junior to senior
• Assessing theoretical and practical knowledge
• Assessing psychological traits
• Providing extensive feedback about candidate

SoftServe | 2022 May — 2023 April

• Mentoring
• Conducting technical interviews
• Leading software development team

Grand Parade, Cracow | 2017 August — 2018 October

• Working on project transition from Tel Aviv to Kraków. Minor features and bugfixes
• Working in React core components team and providing common tools for other teams

NFDI Cracow | 2016 September — 2017 July

• Working tightly with client to meet requirements and further design specific solution that meets business criteria and timelines during whole project lifecycle
• Closely cooperating with iOS team to develop the best possible API interface and to explain correct usage along with pitfalls
• Designing and writing API for iOS application Soopa in Django Rest Framework (Django, elasticsearch, postgres)
• Designing and writing asynchronous update layer
• Providing very flexible and extensible tools for automatic data migrations
• Writing administration panel in Django
• Writing image upload server in flask
• Designing and executing server infrastructure with Ansible playbooks along with application deployments (haproxy, nginx, postgres, elasticsearch)
• Securing servers infrastructure and applications by designing and aplying very strict ACL on every layer
• Setting up monitoring, PITR backups and logs processing for having insight into production server infrastructure, and for tracking application behaviour
• Creating CI infrastructure

Alior Bank S.A., Cracow | 2016 January — September

• Designing and implementing modular monitoring application in Python integrated with
• Nagios from scratch with high percentage coverage of unit tests
• Writing C/C++ application that operates on high volume data
• Writing Java application for processing files and manipulating data in database
• Rewriting IPC library in C on Linux
• Writing multithreaded C++ IPC client
• Providing UML diagrams
• Writing technical documentation and How-To's
• Assisting on system migrations

Neo9 Polska, Cracow | 2015 April — October

• Creating Single Page Application with AngularJS
• Creating backend application with Node.js that exposes REST API to web application with high test coverage
• Creating programming and testing environments
• Writing unit and integration tests
• Writing Docker scripts for applications
• Creating backend application in Go that exposes REST API to web application with high test coverage (github.com/dolohow/PhotoSaloon-backend)

Pegasystems, Cracow | 2014 July — September

• Creating simple HTML5 app in AngularJS for mobile devices
• Creating performance tests with tools for processing them and integrating into Jenkins CI server for discovering regressions
• Creating testing environment for Windows Phone 8
• Fixing bugs in Windows Phone 8 apps
• Small tasks for Android

WooX | 2010 — 2015

• New servers installation
• Building scalable infrastructure
• Creating virtualized instances of GNU/Linux with qemu/kvm
• Keeping existing infrastructure up-date and working
• Scripting in Python and shell

AGH University of Science and Technology

Electronics and Telecommunication (in English) | Bachelor of Science (BSc) | 2016