Oleksandr T.
Kiev, Ukraine
100%
Job Success
Senior Software Engineer / Architect
$80.00/hr
Hi, I'm Oleksandr and I'm a web-developer with the expertise in building websites and creating an architecture of complex web systems.
In the last 5 years, I worked with startups and small companies and developed products that attracted first clients to them. Besides this, I improved existing projects and fixed performance and architectural issues.
I worked with a lot of different cases:
- designing architecture and developing projects from scratch;
- integrating with existing APIs (GitHub, PayPal, Stripe, Braintree, TaoBao, etc.);
- developing new APIs for existing projects;
- fixing various issues;
- performance optimizing, etc.
I have a huge experience with Ruby, Rails, JavaScript, Python, AWS. I took part in designing and development of huge web app (with more than 50 microservices) that serves hundreds of millions of requests per day. Also, I have a huge experience with AWS (with dozens of services) that allows me to build complex and secure apps.
Besides this, I have an experience with high-load, so I've worked with ElasticSearch with terabytes of data, relational databases (such as PostgreSQL and MySQL) with hundreds of gigabytes of data, clusters of Redis, apps auto-scaling.
And in addition, I have an experience with solutions for big-data such as Redshift, Spark, Athena.
Work history
Looking for an experienced full stack web developer to build an interactive website for job seekers
Feb 7, 2018
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Aug 17, 2018
"I had an extremely positive experience working with Oleksandr (Alex). Communication wise, Oleksandr is fluent in verbal and written English. He's quick to respond and available to talk over the…
Private earnings
SUPERFUN Ruby on Rails 5 project (40hr+)
Mar 13, 2017
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Jun 21, 2017
"Very happy with his work."
Private earnings
Front End Developer for Rails App
Nov 7, 2015
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Nov 22, 2015
Private earnings
The True Negative - Website Maintenance
Aug 17, 2018
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Present
Job in progress
Private earnings
Ruby on Rails MVP Project
Mar 22, 2018
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Present
Job in progress
Private earnings
Rails with react project
Aug 13, 2017
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Present
Job in progress
Private earnings
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Skills
- Ruby
- JavaScript
- Ruby on Rails
- Software Architecture & Design