Vitalii – React, Python, Node.js

This product empowers brands with the technology to embrace circular fashion. This allows the brand's customers to put back on sale their past purchases and get paid back within days.

• Built and engineering culture that is attached to company values.
• Was in charge of hiring and performance reviews.
• Set up plans for the growth inside the organization with every engineer.
• Made sure the Roadmap and business goals match with engineering deliveries.

Accomplishments:

• Built 3 new teams from scratch (front-end, infrastructure, data)
• Extended backend team from 3 to 6 people
• Set up and maintain on-call processes which decreased amount of tickets 2 times and improved relationship between teams.
• Started and led a project to optimize AWS infrastructure which led to 40% savings.

Debug, troubleshoot, and analyze parallel CI tests in the Cloud. The platform supported Cypress and Playwright.

Vitalii joined the project as an Individual contributor and the first hire to work with the Technical founder.

He worked on very different features that required cross-domain knowledge.

• Built automatic email reports (daily, weekly, monthly) based on Elasticsearch data while improving Elasticsearch performance and the data structures for other modules. Was a key player in planning the reports and designing them. The reports increased user engagement 3 times.
• Optimised and extended Stripe integration. Subscriptions plan management, overage fee payments, invoices, and custom plans support. It decreased the amount of customer support tickets 3 times and allowed the team to focus on new developments.
• Built tests explorer UI component by using custom SVG components and https://airbnb.io/visx which was widely used in the project.

Besides that, he was constantly improving the documentation, and code quality by adding Unit tests and working on daily basics with the Founder to plan new features.

British-Portuguese online luxury fashion retail platform that sells products from over 700 boutiques and brands from around the world. He joined the company as a Performance Engineer to focus on platform reliability and performance.

• Developed the open-sourced tool to run performance tests
• Developed a tool to visualize 1000+ services on a single screen. The tool decreases the amount of time spent on the incident resolution by two times.
• Developed service SLO and SLA which improved platform reliability and decreased amount of incidents.
• Developed a tool to change traffic between different data centers which helped to reduce the time of resolving incidents 3x times.

An online auction house based in New York City selling fine art, including Post-War and Contemporary art, prints & multiples, photography, street art, and collectables

He joined the company as Senior Full-stack Engineer to be a part of a fully distributed team in 4 timezones. He worked through all stacks from a mobile application to backend implementation on various product features.

• Created k8s cluster and moved all services to Kubernetes. This change dramatically improved the deployment process and allowed them to deploy faster and make a few daily deployments.
• Moved legacy PHP and Node.js applications to Python GraphQL API
• Developed early stages of Ipad and iPhone applications.
• Redesigned front-end to make it faster and easier to support, which led to better user engagement.

The product collects, indexes, and attempts to make available every job that has ever been in existence. By making this information easily accessible, the job seeker has the power to research all jobs and companies they might be a fit for.

• Developed search through 200 million jobs
• Built a team of 4 backend and 2 frontend engineers.
• Created scalable AWS architecture based on AWS ECS
• Wrote unit, functional, e2e tests
• Was a part of the early startup and helped with early engineering decisions
• Contributed to yearly and quarterly project goals
• Mentored and evangelized best engineering practices about systems design and code quality.
• Managed ELK stack to provide observability about all microservices.

The product helps you and your team manage time more effectively, achieve higher productivity, and reach goals faster.

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• Supported 3TB MySQL database, processing more than 1000 transactions/sec
• Created column-oriented databases and fast data aggregation of 100 million rows
• Moved Jquery + Bootstrap-based frontend to React.js
• Integrated payments gateway with 8+ payment systems
• Performed interviews and managed the onboarding of new members
• Collaborated with designers and the product team about the roadmap
• Planned and executed sprint
• Built learning materials
• Managed a team of 6 software engineers and 2 QA engineers