Grzegorz Pawlik, Developer in Sopot, Poland
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Grzegorz Pawlik

Verified Expert  in Engineering

Full-stack Software Engineer and Developer

Sopot, Poland

Toptal member since January 26, 2021

Expertise
Web DevelopmentCode ReviewUnit TestingGitRubyRuby on Rails (RoR)RSpecAjaxFull-stackAlgorithmsJavaScriptPHPMySQLLinuxPostgreSQL
Bio

Grzegorz is a highly skilled full-stack software engineer with 17 years of experience in leading teams, technical screening, and creating a high-trust culture. They consistently deliver high-quality results on time and within budget, specializing in complex apps with extensive business logic. Grzegorz oversaw the MVP chat feature at Toptal and led Stripe API integrations and employee benefits automation in the OysterHR startup. Previously they worked with eSky and Nexway.

Portfolio

Oyster
Ruby on Rails (RoR), Ruby, RSpec, React, Capybara, Heroku, GitHub, TypeScript...
Toptal
Code Review, Git, Management, Cucumber, RSpec, Ruby on Rails (RoR), Ruby, Scrum...
Toptal
Memory Profiling, Profiling, Static Analysis, Code Review, Scrum, Cucumber...

Experience

Code Review - 13 yearsJavaScript - 13 yearsWeb Development - 13 yearsAgile Deployment - 13 yearsPostgreSQL - 7 yearsRSpec - 6 yearsRuby on Rails (RoR) - 6 yearsRuby - 6 years

Availability

Part-time

Preferred Environment

Code Review, RSpec, Git, Ruby, Linux

The most amazing...

...project I've led was the chat app used by Toptal clients and talent. I'm very proud of the team I led and the approach I took to deliver the solution on time.

Work Experience

Senior/Staff Engineer

2021 - PRESENT
Oyster
  • Implemented payment system integration (Stripe) ACH/SEPA/BACS.
  • Tracked and fixed bugs using the Sentry exception reporting tool.
  • Architected and developed employee benefits automation system.
  • Managed tools like Sentry, Heroku, and GitHub Actions.
  • Worked on detecting and fixing security vulnerabilities.
  • Improved CI and CD pipelines and fixed flaky tests.
Technologies: Ruby on Rails (RoR), Ruby, RSpec, React, Capybara, Heroku, GitHub, TypeScript, Stripe API, DocuSign, Sentry, Technical Hiring

Team Lead/Engineering Manager

2019 - 2020
Toptal
  • Led a successful implementation and delivery of a dedicated chat solution, actively worked with stakeholders to manage features, and delivered on time.
  • Onboarded and integrated new team members into the team.
  • Oversaw an established team through a successful domain switch; the team delivered value in the first six months.
Technologies: Code Review, Git, Management, Cucumber, RSpec, Ruby on Rails (RoR), Ruby, Scrum, PostgreSQL, Full-stack, Technical Hiring

Senior Software Engineer

2016 - 2019
Toptal
  • Reduced the time to introduce a new vertical by the factor of 12.
  • Improved internal spec performance by the factor of 5 (includes reviewing and coaching other teams on the best practices).
  • Introduced a fast performing, hybrid (static files + DB entries) translation solution.
  • Mentored new team members joining the team, helping them in their first month.
  • Introduced improvements to the dev's internal toolbox.
Technologies: Memory Profiling, Profiling, Static Analysis, Code Review, Scrum, Cucumber, RSpec, Git, Ruby on Rails (RoR), Ruby, PostgreSQL, Full-stack

Team Leader, Scrum Master, and Developer

2013 - 2016
Nexway
  • Stabilized the team output from chaotic (approximately 10% of the features were rejected by the QA) to very stable (99.48 features accepted in the QA stage).
  • Introduced QA processes into the team (peer reviews, peer testing, hostile peer testing).
  • Led and coached the team on the testing, which increased the code stability and developer's confidence in the codebase.
Technologies: Code Review, Git, Integration Testing, Unit Testing, Testing, Scrum, MySQL, Magento, PHP, Technical Hiring

Developer/Team Lead

2007 - 2011
NetArch Interactive Agency
  • Introduced source code version control, allowing the company to get on the next level.
  • Delivered successfully multiple dedicated web systems solutions.
  • Designed multiple systems, including architecture and database structure.
Technologies: Code Review, Git, Ajax, jQuery, JavaScript, CakePHP, MySQL, Apache, PHP

Embedded Chat App

https://portal.toptal.com/
The chat app allows communication between Toptal's clients and talent. Clients can send messages from their portal, and talent can respond via Slack.

I led the team responsible for the 1st MVP version, which was delivered and deployed within three months. It was initially enabled for selected clients and then handed over to another team that enabled it 100%.

Employee Benefits System

https://oysterhr.com/total-rewards
A system managing benefits for employees worldwide, supporting multiple—manual and automated—benefits providers. The system includes various benefits (health, pension, dental, allowance) and integration with payroll and invoicing subsystems.

Direct Debit (Stripe) Integration

https://oysterhr.com/
Implemented a payment solution for international clients by directly charging them for provided services (Direct Debit: ACH, SEPA, Bacs, BECS). I delivered an extensible and well-delineated interface that has been the foundation for collections at Oyster for the last three years (as of 2024).
2007 - 2009

Master's Degree in Project Management

Wyższa Szkoła Zarządzania i Biznesu - Kraków, Poland

2003 - 2006

Bachelor's Degree in Computer Science

Uniwersytet Opolski - Opole, Poland

FEBRUARY 2014 - FEBRUARY 2020

Magento Certified Developer

Magento

Libraries/APIs

Slack API, Twilio API, jQuery, React, Stripe API

Tools

Git, RSpec, Cucumber, Apache, GitHub, Sentry

Languages

Ruby, JavaScript, PHP, Assembler, C++, TypeScript

Frameworks

Ruby on Rails (RoR), CakePHP, Capybara, Ruby on Rails 6

Paradigms

Scrum, Testing, Unit Testing, Management, Test-driven Development (TDD)

Platforms

Linux, Magento, Magento 1, Heroku

Storage

MySQL, PostgreSQL, EventStore

Industry Expertise

Banking & Finance, Accounting

Other

Web Development, Code Review, Integration Testing, Agile Deployment, Algorithms, Static Analysis, Profiling, Memory Profiling, Technical Hiring, Ajax, Full-stack, State Machines, Turing Machines, Computer Graphics, Law, Economics, WebSockets, Performance Testing, DocuSign, Events

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