- Led the revitalization of ResearchGate's Open Access Import process, propelling Open Access PDF imports to over 1 million items per quarter.- Slashed operational costs by 30% for a specific component, optimizing resource allocation.- Spearheaded the creation of a no-code solution, enhancing the efficiency of Open Access research imports without the need for software engineers' intervention.- Constructed a robust Jenkins CI pipeline for unit, integration, and end-to-end tests… Show more - Led the revitalization of ResearchGate's Open Access Import process, propelling Open Access PDF imports to over 1 million items per quarter.- Slashed operational costs by 30% for a specific component, optimizing resource allocation.- Spearheaded the creation of a no-code solution, enhancing the efficiency of Open Access research imports without the need for software engineers' intervention.- Constructed a robust Jenkins CI pipeline for unit, integration, and end-to-end tests, image building, and seamless deployment to the development Kubernetes cluster.Skills and Keywords:- JavaScript- PHP- React- GraphQL- Redux- Hive- MongoDB- Open Access Import- Performance Optimization- CI/CD Pipeline- SEO- System Architecture- No-Code Solutions- Payment Provider Integration- Search Traffic Growth Show less

- Migrated logged-out pages to GraphQL, consistently contributing to remarkable traffic growth. Achieved an astounding 300% increase in search traffic across 170M+ indexed pages.- Optimized SEO and backend and frontend page performance, resulting in an impressive milestone of up to 90M monthly visitors and top Search Engine Results Page rankings.Designed and implemented a subscription sign-up flow and management system, delivering the entire solution within a groundbreaking two-month… Show more - Migrated logged-out pages to GraphQL, consistently contributing to remarkable traffic growth. Achieved an astounding 300% increase in search traffic across 170M+ indexed pages.- Optimized SEO and backend and frontend page performance, resulting in an impressive milestone of up to 90M monthly visitors and top Search Engine Results Page rankings.Designed and implemented a subscription sign-up flow and management system, delivering the entire solution within a groundbreaking two-month timeframe.- Architected a versatile system to accommodate various payment providers, enhancing subscription checkout and management with React and GraphQL.- Transformed the Publication Creation Flow into a seamless journey, leveraging React and a single-page application approach to significantly boost conversion rates. Show less

As the technical lead I had such privileges:* Made architectural and technical decisions for the team* Built efficient, reusable and testable software* Created and adopted best practices for engineering within the team and across the company* Coordinated with product managers and other technical leadsThe big projects: Replacement of existing EPR software solution. As this is a core business component, it required the whole company effort, coordination with other… Show more As the technical lead I had such privileges:* Made architectural and technical decisions for the team* Built efficient, reusable and testable software* Created and adopted best practices for engineering within the team and across the company* Coordinated with product managers and other technical leadsThe big projects: Replacement of existing EPR software solution. As this is a core business component, it required the whole company effort, coordination with other teams, careful refactoring, fast implementation without compromising the software quality. The big focus was on connecting microservices with the future ERP software product, preferably by taking advantage of serverless architecture. As a lead software engineer I took a lead in coordinating the migration of the services our team was owning to the moment: stock management, payments, vouchersStock service. Designing and implementing Golang application run in docker container by AWS ECS. In result very fast application that runs on low resources. Once more that was a part of decomposing a monolithic application, so a lot of analysis of the existing system and automated testing was involvedTechnical stack: Golang, docker, AWS ECS, Mysql, SNS Show less

The bigger projects I was fully responsible and successfully delivered big value to the complany within first two years:Rebuilding Voucher service. One of the first microservices in the company. My team was fully responsible for building the service starting from collecting business requirements, building architecture, choosing technical stack, implementation, unit testing and acceptance testing, deployment and monitoring. And also to connecting it back to the monolithic… Show more The bigger projects I was fully responsible and successfully delivered big value to the complany within first two years:Rebuilding Voucher service. One of the first microservices in the company. My team was fully responsible for building the service starting from collecting business requirements, building architecture, choosing technical stack, implementation, unit testing and acceptance testing, deployment and monitoring. And also to connecting it back to the monolithic applicationTechnical stack: PHP, Elasticbeanstalk, serverless Lambda (Node.js), Cloudsearch, S3, SNSRefactoring of the checkout process. Business logic was collected from all around the models, controllers and sometimes views to classes according to SOLID principles. Simple, single responsibility classes, injected by dependency container was used while doing this project. Unit test coverage went close to 100%. Closely worked on the introduction of the automated test suite that was backing up the critical business process for any e-commerce product: the orderTechnical stack: PHP, PHPUnit, Codeception Show less

Worked as a software engineer in a first Scrum team. I was involving myself into developing the existing traffic intensive web app product, covering core libraries with unit tests, building automated tests suite, actively participating in planning meetings, demo meetings and regular sync meetings with UK-based product owners to clarify business requirementsTechnical stack: Javascript, PHP

Worked remotely as a contractor software engineer. I was helping to architect solutions for new PPI products, implementing new features, optimizing CPC, CPV, XML search feeds products, integrating third-party APIs into the system, day-to-day conversations with Canadian product owners to get feedback and getting requirements for next features.Technical stack: PHP, Javascript, Mysql, nginx

Worked as a software engineer in a small team based in Kyiv. Our team was focused on developing highly scalable, traffic intensive, full-featured ad-serving technologies for CPC, CPM, CPV, CPA markets. Implemented new PPI, CPA products, developed custom OLAP reporting solution. I was often communicating with Canadian product owners and US partners to obtain clarifications for the requirements or demo the results.Technical stack: PHP, Javascript, Mysql, nginx