Dmitriy Levy Email & Phone Number

United States

Plan-Les-Ouates, Geneva, Ch

- Leading the development and architecture of an innovative microservice system, designed to replace an outdated legacy system and resolve bottlenecks for customers and service representatives, set to revolutionize operations in all North American stores upon completion.- Architected and deployed multiple new services to improve current legacy system; messaging service, enabled real-time communication by establishing a system for sending, receiving, and routing messages to appropriate websocket connections; products service, streamlined product information management by creating a multi-process system that syncs data from various sources, keeps product information current, and empowers stores to customize search results for faster transactions (quantified benefit); customers service, ensured data integrity by building a system that synchronizes customer information between a new database and the legacy system. successfully launched these services in a production environment to select stores, resulting in a 10x increase in transactions over expectations during the initial release.

New York City, New York, Us

- Company faced outsized Compute Engine costs in GCP due to improper queueing and scaling of Kubernetes when processing high volume sales metrics. Implemented event-driven Pub/Sub processing in Node, improving reliability and reducing costs. Integrated Pub/Sub architecture to move away from GCP Task Queues so that backend systems can avoid having resource spikes. - Set up GCP User permissions via Terraform to allow testing of the Pub/Sub system testing, shortening the feedback loop when testing in development and production environments.- Complete backlog tickets, including bugs from frontend, backend, and infrastructure codebases, mostly migrating features from a REST API to a GraphQL API.- Built ETL Pipeline using Apache Airflow designed to incrementally extract new and updated data, perform advanced transformations, and efficiently store it in a SQL database for analytical and operational use. Its successful implementation aided business onboarding, data-driven decisions, and strategic initiatives- Developed a type-safe database access layer that eliminated runtime database query errors in production.

New York, New York, Us

- Integrated Jest Testing into NodeJS server, added Jest Testing to CI/CD pipeline using GitHub Actions and output Detailed Test Coverage per file. Achievement: reached 30% to 90% code coverage. Multiple deployments to production daily.- Added an RDS Proxy to utilize Connection Pooling to reduce CPU overhead and help scale the database properly. Used Terraform to manage infrastructure. Achievement: Reduced costs by ¼ .- Integrated AWS SNS to send push mobile notifications to Apple devices using APNs and VoIP notifications.- Architected Personalized Feeds based on User interaction events to a given piece of content using Redshift as a data warehouse to store events.- Scheduled Cron jobs that are run on Node.js servers and using Redis as the Queue. Using Bull as a library ensures the Cron jobs are atomic and can handle concurrent requests.- Integrated libraries to achieve various features such as Multi-Factor Authentication, Video Sessions (client-server), Track customer events, API logging with HTTP tracing/transactions, and Integrating Slack to emit logs from rule-defined filters.

Created a website to collect customer information and serve them as leads to businesses using Gatsby.js instead of Next.js for SSG (static site generation) and for the developer ecosystem, React.js, TypeScript, Firebase RealTime Database, Firebase Serverless Cloud Functions, Google reCAPTCHA, Tailwind Css framework, and Antd (Ant Design) UI Component Library

New York City, New York, Us

TheGuarantors is a FinTech company that offers innovative risk and financial solutions for the real estate ecosystem. With a focus on data and industry expertise in real estate, risk, and finance, TheGuarantors has created winning opportunities for landlords, leasing staff, brokers, renters, and tenants by taking the risk out of the leasing process and making it more efficient at the same time. While Guaranti solves for risk on the multifamily side, Securiti is bringing office landlords and tenants closer together by making the security package cheaper and easier to buy.We are rethinking industry inefficiencies and market needs to create solutions where everyone wins. TheGuarantors was named to CNBC's 2018 Upstart 100 list of promising startups to watch.

Berlin, De

Tron Game​ | ​ A modern take of the flash Tron game that can be played across a local network• Stored session-specific information in session cookies to leverage the inherent cryptographic signing and encryption of sessions in order to preserve user instances across page views and refreshes for a more secure and enhanced user experience• Established WebSocket communication by initializing a bidirectional persistent connection from client to server to avoid the overhead of unnecessary HTTP requests by polling for new data improving server traffic and network performance.SchemaGen​ | ​ Mongoose Schema Generator• Used React Router to create a single page application with client-side routing that enables navigation without refreshing or making unnecessary and expensive server requests.• Architected backend server with Node/Express, leveraging routers and controller middleware to provide an API that provides external clients access to persisted data and CRUD operations, interacting with a PostgreSQL database• Implemented a Postgres database by creating strict schemas to persist user information while enforcing ACID compliance for data consistency, and to take advantage of one-to-one, many-to-many and one-to-many relationships to eliminate data duplicity.

New York, Us

Architected Node.js framework to extend gRPC (Google’s Remote Procedure Calls), for efficient microservice communication within distributed systems, offering features like simplified SSL, auto-retry, and more readable syntax for adding event-listeners to bi-directional streaming sockets.Utilized TDD with Jest’s automated-testing framework red, green, refactor approach for rapid, for parallelized test suites, Jest's Mock Functions API's custom resolver method for spying on ES6 class methods, and integration/unit-test coverage monitoring to increase codebase maintainability.Migrated React application to Next.js framework, improving user experience and reducing time to first load through reduced latency via page prefetching, automated code-splitting, dynamic routing, and static export for deployment to AWS S3 and AWS Cloudfront CDNs for static caching.Increased gRPC distributed-system fault tolerance by providing built-in health-check enumerable through dynamic multi-protobuf compilation of custom gRPC service methods, accessing a service status-map in a closed-over variable environment following the setter/getter OOP paradigm.Integrated CI/CD continuous integration with Travis CI, yielding a faster iteration cycle and automated testing of new feature branch code.Designed stream-data processing algorithm, piping multiplexed gRPC full-duplex calls into Node.js fs module readable stream to support parallelized transfer of bytestring buffers over HTTP/2, marking the first open-source gRPC file transfer feature for polyglot distributed systems.

New York, Ny, Us

• Composed bash scripts to deny false positive threads and make critical consequential heavy decisions by tracing HTTP requests andconfirm the origin reputation is not malicious.• Conducted basic penetration tests with Kali Linux to scope out vulnerabilities of the attack surface and gave presentations based on best securitypractices, and the overall assessment.

Computer Science

Advanced Regents Diploma, Law