Alex

Work on the backend infrastructure of testmon.net and guestcloud.sk

Design and implementation for Cardano cryptocurrency into crypto-related projects for Fintech company - 01People. Managing cardano-node (cli/api/wallet), cardano-sync-db (which is blockchain to PostgreSQL synchronization tool, >1billion rows), implementing deposits, withdrawals, NativeToken minting., NFT minting, Royalties, and other Cardano related features (CIP(s)).

Worked with: Docker, Cardano (all services that exist), Python, Django, RESTframework, Git, PostgreSQL, Redis

Design and implementation company’s e-commerce and intranet which binds together e-shop, accounting software (MRP), warehouse data and retail data (cash-register), creating a digital “big picture” overview and easy management of every aspect related to company management and its business.

Worked with: Nginx, Gunicorn, Python, Django, PostgreSQL, Bootstrap

Backend developer on a bigger team of 20 developers + 11 QA for a Finnish telecommunication company DNA (dna.fi). Responsible for delivering new features and resolving production bugs in multiple web applications (webshops, order handling, customer self service, CRM and administration application)

Workded with: Python, Django, VueJS, jQuery, MariaDB, Redis, UML, Git, Jira, Confluence, Bitbucket

Design and implementation data structure and gathering for pex.com, a Digital Rights Management platform. Large scale data scrapping, processing >1TB data per day, >1billion rows  in PostgreSQL, all optimized for realtime processing.

Worked with: Nginx, Gunicorn, Python, Django, RESTframework, Celery, Flask, PostgreSQL, Redis, RabbitMQ, BigData, HBase, Hadoop, Phoenix, Kafka, ZooKeeper, Hive, Git

Design and implementation of different parts of the system Reactor.am,  an analytical/marketing tool similar to today’s exponea(.com) of ifttt(.com) based on realtime user-action to trigger-action. Mainly implementation and maintenance of 3rd party data sources for rich action-trigger scenarios from weather forecasts, sports results, stock prices, whole services like Shopify, Mailgun etc.

Worked with: Nginx, Gunicorn, Python, Django, Celery, PostgreSQL, Redis, AmazonAWS, AmazonS3, DynamoDB

Design and i implementation for Synopsi.tv, a personalized movie recommendation system (machine learning), especially data processing, scraping, cleaning, managing. From effective/optimized database structure to scraping with proxy/VPN/TOR obfuscations, ban mitigations from audio/video services such as IMDb, Netflix, AmazonPrime, TVRage, BlinkBox, Hulu, Vudu, Hitbliss, PirateBay and many more. Development of data administration system (>10M titles).

Worked with: Nginx, Gunicorn, Python, Django, Celery, PostgreSQL, Redis, MongoDB, Tor, AmazonS3, Hetzner, Load-balancing (zero-downtime approach)

Design and implementation for Zoznam the largest Slovak internet company, of custom-build CMS framework in Perl and of various news e-magazines: topks.sk, dromedar.sk, feminity.sk, autominy.sk, mojdom.sk. Internal tools, newsletter system, various plugins for custom CMS (weather data, stocks data, …)

Worked with: Apache, Perl, MariaDB, Memcached, multi-server infrastructure, load balancing, master-slave replication, +100k users

Design and implementation of custom-build CRM, CMS applications, using Laravel and Symphony PHP frameworks. Customization and plugins development for open-source projects: Wordpress, Magento, eCommerce, 20+ e-shops. Frontend designs Photoshop/Illustrator/HTML/CSS/JS (oldschool)

Worked with: PHP, Apache, MySQL

Lineapp: was a universal event mobile application, that automatically redesigned itself based on phones GPS location near ongoing event, concert, festival, containing event data, lineup, maps, other promoter info.

Worked with: Ngnix, Gunicorn, Python, Django, RESTframework, Git, PostgreSQL, Redis, Apache Cordova, AngularJS, Ionic

Tradingsystem: is robust stock and stock options fully autonomous algorithmic trading system for state-machine-like trading algorithms via InteractiveBrokers API. Large scale data scrapping for most-informed decision/price-action trading decisions. >1M data rows per week, EconomicEvents, StockOptions, SocialScanner (real-time twitter scraper >10k tweets/month), MarketSnapshots (OTC/NASDAQ/NYSE), for up-to-date data, StockSignals based on social, macro-economic, unusual market events, company share structure changes, … many more.

Worked with: Ngnix, Gunicorn, Python, Django, Git, PostgreSQL, Redis, Bootstrap, IB Gateway (API)

InGym: is event/course management system for sport clubs, with user, payments, courses, attendance management. Automatic payments pairing, newsletters, notifications and more.

Worked with: Ngnix, Gunicorn, Python, Django, Git, PostgreSQL, Redis, Bootstrap