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Bartek – Python, Django, React, experts in Lemon.io

Bartek

From Poland (GMT+2)

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Back-end Web DeveloperSenior
Hire developer
7 years of commercial experience
Advertising
Banking
Data analytics
E-commerce
Fintech
Management
Marketing
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Bartek – Python, Django, React

Bartek is a seasoned Python developer with over 6 years of commercial experience. His interests span programming, software architecture, and DevOps. Known for his curiosity and positive attitude, he excels in web API development, databases, CI/CD practices, web API frameworks, and the cloud and is ready for complex projects.

Main technologies
Python
5 years
Django
1 year
Additional skills
React
JavaScript
Typescript
FastAPI
AWS
Docker
Lambda
DynamoDB
Amazon SQS
Selenium
CircleCI
Bitbucket
Postman
ElasticSearch
PostgreSQL
Kubernetes
Amazon S3
Flask
CircleCI
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior Backend Developer
May 2022 - Ongoing2 years
Project Overview

This is a Fintech platform that enables Clients to make fiat (and crypto in the future) currency transactions, intending to have competitive pricing compared to other players, like Revolut, Wise, etc.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Created & improved RESTful application
  • Implemented transaction endpoint idempotency
  • Increased and ensured test coverage
  • Improved error handling
  • Worked on 3rd party service integration
Project Tech stack:
FastAPI
AWS
Lambda
Amazon SQS
CircleCI
Bitbucket
Docker
Python
API testing
Integration testing
Unit testing
PostgreSQL
Postman
Senior Back-End Web Developer
Apr 2021 - Jun 20221 year 2 months
Project Overview

This is an application that provides funding for eCommerce sellers who operate on one or multiple platforms.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Refactored legacy system
  • Raised code test coverage from ~30% to over 80%
  • Decreased failure rate from 70-80% to around 1-2%
  • Decreased onboarding time from ~10-15 min to <3 min
  • Added monitoring, including KPI statistics for business
Project Tech stack:
AWS
Python
Design system
Database design
DynamoDB
Docker
StepFunctions
Amazon S3
aws-cdk
Cloud Architecture
Amazon SQS
scraper
Selenium
Software Developer
Nov 2019 - Apr 20211 year 4 months
Project Overview

They have created an in-house CDP platform for a 3rd party customer, including data collection, processing, and analysis. The data was User gathered data used to develop Audiences for personalized ad targeting.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Implemented API
  • Implemented piggyback tracking
  • Wrote unit, integration, and contract tests
  • Rewrote part of docker-deployments into k8s
  • Participated in project architecture design
Project Tech stack:
Django
AWS
ElasticSearch
PostgreSQL
Contract Testing
API testing
Docker
Kubernetes
Python
Typescript
React
ETL
Back-End Web Developer
Feb 2018 - Nov 20191 year 9 months
Project Overview

The application's main feature was to create and manage Facebook and Google ad campaigns in a single place, with a simple interface, and to make it as accessible to others as possible.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Implemented backend API to manage Facebook campaigns
  • Participated in product and architecture design
  • Researched Facebook and Google Ads documentation
  • Wrote unit and integration tests
  • Integrated with different providers
Project Tech stack:
Django
Python
AWS
Docker
PostgreSQL

Education

2017
Apllied Science
Bachelor

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