Konrad Ryłko

Full Stack Elixir Engineer · Startups & Fintech

Full stack engineer with 10+ years of experience specializing in Elixir, Phoenix, and LiveView. Built CBDC platforms for national central banks and payroll systems at scale. I thrive in startups where I can own problems end-to-end.

Experience

Back End Elixir Engineer
Remote.com · Spain & Canada payroll teams
  • Co-owned the Spanish payroll rules engine (Elixir, Phoenix, Oban). Later laid the foundation for Canada's engine, including a major pay element architecture refactor.
  • Led Spain's SILTRA social security integration, translating regulatory requirements into scalable architecture; built supporting React features.
  • Redesigned payslip architecture for Spain and Canada, aligning legal, payroll, and UX requirements.
Backend Engineer
Bitt · Central Bank Digital Currency
  • Built transaction processing and wallet services for national CBDC platforms (Central Bank of Nigeria, Eastern Caribbean) using Elixir, Phoenix, GraphQL, and Oban.
  • Co-led rearchitecture of multi-tenant platform serving multiple central banks, improving performance, isolation, and maintainability.
  • Designed GraphQL APIs powering millions of transactions at national scale.
Full Stack Ruby on Rails Developer
Webdoctor.ie · Telemedicine
  • Built web and mobile telemedicine experiences for remote patient consultations (Rails, Turbolinks).
Full Stack Rails & React Developer
Pulsate · Mobile Marketing Automation
  • Owned full-stack features for a high-throughput push notification platform - hundreds of thousands of messages during peak events (Rails, React, MongoDB).
Full Stack Rails & React Developer
Parachute Health · Healthcare
  • Built insurance eligibility rules and ordering workflows supporting multiple providers (Rails, React, PostgreSQL).
  • Integrated operational tooling (Zendesk) and evaluated HIPAA-compliant session recording.
Full Stack Ruby on Rails Developer
Brooklyn Bridge Labs · Startup Contractor
  • Shipped full-stack products for 5+ early-stage startups across fintech and e-commerce (Rails, JavaScript), including CoinOut (later Shark Tank-funded).
Junior Ruby on Rails Developer
Akra Polska

Skills

Back End
Elixir (Phoenix, LiveView, OTP, Oban), Ruby (Rails, Sidekiq), PostgreSQL, Architecture & Data Modeling, Linux
Front End
JavaScript, React, TypeScript, TailwindCSS, HTML/CSS
Exploring
ML/AI (Nx, Axon), Mobile Development
Domain Knowledge
Payroll systems, CBDC infrastructure, Fintech, Healthtech

Education

IT Project Management - AGH University of Science and Technology 2016 – 2017
MSc Electrical Engineering - AGH University of Science and Technology 2012 – 2014
BSc Electrical Engineering - Cracow University of Technology 2008 – 2012

Certificates