Responsibilities & achievements

Initially, my task was to get familiar with the actual back-end written on Clojure. Next, I had to explore its syntax and peculiarities of how it operates since it was my first introduction to this programming language. The following task was to re-write Clojure requests on a brand new back-end utilizing Node.js (Express.js). After the migration of all requests, I was handling arising issues and eliminated discrepancies. I was also writing extremely complex psql DB request to calculate a financial portfolio with specific requirements. My main responsibilities as a DevOps engineer were the following: • Setting up and maintaining pipelines in Jenkins • Migrated all pipelines from Jenkins to AWS CodeBuild • Spun up EC2 machine that was collecting metrics from Prometheus • Configured Grafana • Wired up metrics from AWS CloudWatch, Redis and Elasticsearch to Grafana • Migrated RDS from PG 10.17 Serverless v1 onto PG 13.7 Serverless v2 As for my experience working with AWS services (with a help of Terraform), I can highlight tight interaction with these services: • CodeBuild - here variety of our projects were built and deployed • OpenSearch - our 15000000 products for search output were stored there • AWS Lambda - performed images processing, resizing and compression • ElasticTranscorder-wherevideosinhlsformatofdifferentqualitywerebeing processed • EC2-that's where our bastions, server with metrics and feed processors were stored • ECS - our services with Fargate were stored • Load balancer - to balance server load • Route53 - our dns adresses • AWS Cloudfront - where all our frontend applications were deployed • Elastic Cache - Redis used for data caching • RDS with databases • AWS IAM - roles and permissions • Event Bridge - to run tasks automatically (cron jobs). • And other various services: Amazon Athena, S3, SQS, SES, VPC, KMS, X-Ray

Responsibilities & achievements

• Develop and maintain the frontend of the WorkShield website using React, Redux, React Hooks, and Ant Design, ensuring a user-friendly and responsive design that is accessible to all users. • Design and implement the backend of the system using Node.js and Express that ensures robust security measures to protect employee privacy and confidentiality. • Develop and maintain the database schema using Sequelize and MySQL, ensuring efficient and scalable data storage and retrieval for all incident and resolution data. • Utilized Docker (Docker-compose) for containerization, ensuring consistency and portability across different environments. • Collaborate with UX/UI designers and product managers to implement new features and enhancements to the platform, using agile development methodologies to guarantee timely delivery and high-quality code. • Implement automated testing and continuous integration/continuous deployment (CI/CD) pipelines using tools such as Jest, and AWS CodeBuild to secure high code quality and efficient deployment of changes. • Provide technical support and troubleshooting for any issues that arise with the website or backend, working closely with the product team to identify and resolve issues quickly and efficiently.

Responsibilities & achievements

• I played a key role in the successful delivery of two projects - an admin platform and a main site - for an eCommerce platform. Leveraging my expertise in React, Redux, and TypeScript, I built the frontend for both projects from scratch, adhering to the client's design guidelines and ensuring seamless integration with the backend • Designed a comprehensive logic of the webinar structure and integrated third-party APIs, including Stripe, for executing and processing payments. I used my experience in working with asynchronous calls and integrating APIs to build a robust and reliable payment processing system that met the client's requirements. • On the backend, I leveraged my experience in Node.js, Express, and MySQL to implement the necessary functionality for both the admin platform and the main site. Additionally, I worked with AWS S3 and AWS Lambda to manage the storage and processing of large amounts of data. • I was responsible for designing and architecting scalable and maintainable systems that meet the project's requirements. This includes selecting appropriate technologies and tools, defining the overall structure of the application, and identifying potential scalability and maintenance issues. • I was also responsible for optimizing the application's performance. This includes identifying and resolving bottlenecks, implementing caching strategies, and optimizing database queries to improve response times and overall system performance.

Responsibilities & achievements

• Develop and maintain a digital solution that monitors production machines and reduces unplanned downtime, thereby improving manufacturing performance. • Create and update machine profiles, work instructions, and documentation to enable autonomous maintenance and easy operations, leading to optimized manufacturing requirements. • Develop an intuitive and visually appealing dashboard that displays key performance indicators (KPIs), such as production rates, machine downtime, and quality metrics. • Implement real-time data streaming to provide up-to-date information on the status of production machines and enable timely decision-making. • Ensure that the dashboard is accessible on multiple devices and platforms, and supports customization based on user preferences.