Szymon B.
Full-Stack Developer
Experience
Mar 2025 - Present
9 monthsFull-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 monthsFull-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 monthFull-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 monthFull-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 monthsFull-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 monthsFull-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 monthsFull-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 monthsWeb Developer
Freelance
- Delivered custom web solutions for clients, focusing on small business needs
Aug 2014 - Oct 2014
3 monthsRuby & 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
NativeEnglish
Advanced Need a freelancer? Find your match in seconds.
Try FRATCH GPT More actions
Similar Freelancers
Discover other experts with similar qualifications and experience
- English
- Deutsch
2025 © FRATCH.IO GmbH. All rights reserved.