About

Work Experience

• Senior Backend Engineer, solarisBank AG

  Oct, 2017 - Present

  solarisBank builds and provides a Banking-as-a-Service platform for businesses based on various APIs. I joined Cards Team where from the beginning I worked on multiple cards related products, mainly in Ruby language.

  • Cards Management - issuing and managing cards, integrating with 3rd party providers.

  • Processing Cards Transactions - building a complex mechanism and service for processing card transactions.

  • Smart Agent - allowing customers to receive and respond to fraud alerts digitally and moving fraud management away from labour-intensive call centers.

  • 3D Secure - an additional security layer for online credit and debit card transactions allowing our customers to be safer online.

  • Cards Tokenization - tokenization of customers' cards allowing them to use digital wallets, like Apple, Google, Samsung.

  • PCI DSS Compliance - building a safe and PCI DSS compliant security system for Cardholder Data (CHD) with Cyber & Architecture Teams.

  • Building and moving to AWS infrastructure - designing and implementing infra as code for cards services during the company migration to AWS Cloud by leveraging Amazon Services for specific applications.

  • Technologies: AWS: Fargate, S3, Lambda, RDS, DynamoDB, Secrets Manager, Cloudwatch, Terraform, Docker | Ruby: Sidekiq, Shoryuken, Grape, dry-rb, Sequel

• Senior Ruby on Rails Developer & Team Leader, Netguru

  Dec, 2016 - Jan, 20203 years 2 months

  2 projects: A LinkedIn-like platform for invitation-only users & An exclusive career marketplace that connects high-potential candidates to top-tier employers

  • Functionality that enables user to add/remove job opportunity, to/from watching list, integrating application with Segment.io + implementing custom analytics events on backend, developing API for frontend part of the app, implementing a robust search engine with Searchkick and Elasticsearch, refactoring legacy code, implementing multiple user type architecture, implementing a CSV importer for adding new users to the platform, designing and implementing state machine structures for most common models, implementing referrals mechanism.

  • Integrating new design with an already existing platform, setting up a staging environment and deployment with Capistrano, fixing bugs in frontend and backend part, speeding up an app by optimizing database queries, cleaning codebase by removing legacy code, implementing a panel to add career offers visible on a homepage, implementing a dashboard statistics panel to show users activity, fixing security issues, introducing decorators and service object patterns, implement tracking user activity services, introducing page objects pattern and implementing features specs.

• Ruby on Rails Developer, Netguru

  Apr, 2015 - Dec, 20161 year 8 months

  2 projects: A platform for job-seeking, recruitment, and learning for African market & An application for passive recruitment which uses external APIs to gather information about candidates and employers.

  • Email invitations secured with tokens, main functionalities in the platform like work experience references and skill references, campaign creation multistep form, a messaging system using Mailboxer gem, optimizing database queries to avoid performance issues.

  • Designing and implementing main app's architecture, architecture for API clients, background processing solution using Sidekiq, simple event store solution for processing published events, a module for sending daily reports via email, panels for viewing/managing resources in an admin panel, monitoring for API queries in an admin panel, implementing a service to divide long titles into small meaningful keywords.

• Junior Ruby on Rails Developer, Netguru

  Jan, 2015 - Mar, 20153 months

  2 projects: Flight support management app & Multi-platform where people can find each other quickly, conveniently and exchange services.

  • Integrating the application with Amazon S3, improving new contacts addition and editing contacts details.

  • Generating PDFs for vouchers and invoices, building validations for forms.

• Ruby on Rails Intern, Netguru

  Dec, 2014 - Jan, 20151 month

  One-month internship in the project building a video on demand platform.

  • Implementing discount coupons for purchase orders

  • Sending emails to customers (overdue orders)

• Product Development Manager, AIESEC Krakow

  Oct, 2013 - Mar, 20151 year 5 months

• e-Marketing Specialist, MTWeb.pl

  Jun, 2014 - Oct, 20144 months

  Interactive Agency founded in 2005 specialized in SEO, SEM, Social Media, creating Google Ads, Facebook Ads campaigns.

  • Preparing email marketing campaigns & marketing strategies with advertising Campaigns in Adwords and FB Ads

• Online Marketing Specialist, AIESEC Polska

  Feb, 2014 - Jul, 20145 months

• Intern, SALESmanago

  Aug, 2013 - Nov, 20133 months

Projects Experience

• Netguru College, Netguru

  Nov, 2018 - Nov, 20182 days

  Ruby on Rails Weekend Workshops | November Edition in Cracow

• Netguru College, Netguru

  Jul, 2018 - Jul, 20182 days

  Ruby on Rails Weekend Workshops | July Edition in Cracow

• Netguru Ruby on Rails Weekend Workshops, Netguru

  Dec, 2015 - Dec, 20152 days

  Ruby on Rails Weekend Workshops | December Edition in Katowice

• Netguru Ruby on Rails Weekend Workshops, Netguru

  Oct, 2015 - Oct, 20152 days

  Ruby on Rails Weekend Workshops | October Edition in Wroclaw

Skills

Education

Certificates

Publications

Interests

References