Szymon B.

Full-Stack Developer

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Warsaw, Poland

Experience

Mar 2025 - Present
10 months

Full-Stack Developer

LetMePay

  • Maintain and extend features in a mature Ruby on Rails app dealing with payments and clinical trials
  • Manage server infrastructure
Oct 2022 - Mar 2025
2 years 6 months

Full-Stack Developer

Xurrent

  • Developed features in a large-scale legacy Ruby on Rails app, improving system performance and maintainability
  • Implemented AI features using AWS Bedrock and built supporting services in Python
  • Enhanced test coverage using Rspec and Cucumber
  • Used React to develop complex frontend solutions
Oct 2020 - Oct 2022
2 years 1 month

Full-Stack Developer

Beema

  • Redesigned insurance policy architecture, expanding product coverage to travel and health insurance
  • Migrated testing framework from Rspec to Minitest, mentoring the team on best practices
  • Improved developer-designer collaboration by refining workflows and improving UI/UX consistency
  • Introduced Hotwire and support for native mobile apps
Oct 2019 - Oct 2020
1 year 1 month

Full-Stack Developer

LetMePay

  • Enhanced payment processing features and optimized backend workflows in Ruby on Rails
  • Diagnosed and solved performance bottlenecks, implemented caching strategies, and resolved N+1 query issues
  • Led frontend migration from Backbone.js to standard Rails stack, improving maintainability
Jun 2019 - Sep 2019
4 months

Full-Stack Developer

SonarHome

  • Developed core features for a real estate platform using Rails, React, and ElasticSearch
  • Wrote comprehensive tests to ensure system stability during high-traffic operations
May 2018 - Jun 2019
1 year 2 months

Full-Stack Developer

Educartis

  • Built and maintained a course-finding platform using Rails, Vue.js, and Algolia Search
  • Integrated third-party APIs (e.g., Pipedrive) and optimized page load times
  • Migrated features away from Vue.js to simplify the stack
Feb 2015 - May 2018
3 years 4 months

Full-Stack Developer

LetMePay

  • Enhanced payment processing features and optimized backend workflows in Ruby on Rails
  • Diagnosed and solved performance bottlenecks, implemented caching strategies, and resolved N+1 query issues
  • Led frontend migration from Backbone.js to standard Rails stack, improving maintainability
Nov 2014 - Jan 2015
3 months

Web Developer

Freelance

  • Delivered custom web solutions for clients, focusing on small business needs
Aug 2014 - Oct 2014
3 months

Ruby & JS Developer

Bitmaker Labs Developer Bootcamp

  • Completed an intensive full-stack development bootcamp focused on Ruby, Rails, and JavaScript

Summary

Full-stack software engineer with over 10 years of experience specializing in Ruby on Rails, testing, and complex legacy systems.

Skilled in designing scalable architectures, improving code quality, and leading technical initiatives.

Passionate about clean code, performance optimization, AI integrations, and mentoring developers.

Languages

Polish
Native
English
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