Eugene Yavaev

Designed and implemented an API ecosystem for a healthcare project, including authentication with HMAC-signed requests and JWT lifecycle management. Overhauled access management and implemented alerting metrics for equipment outages.

Maintained existing codebase, migrated legacy monoliths to microservices, and provided architectural analysis and system design. Supported release builds, deployments, CI, and code reviews.

Built a crowdfunding project from scratch, including domain analysis, payment integration, API design, deployment, and testing. Coordinated with front-end/UI team.

Implemented and maintained a bootstrapper for company projects, designed core components, and participated in global technical architecture. Wrote behavior tests, supported CI, and mentored developers.

Implemented a data processing API service in a distributed microservice environment, maintained financial computations codebase, and integrated with third-party financial data providers. Supported document export gateways.

Worked on codebase to circulate onboarded clients' data across system services, supported microservices interaction via MQ, and designed GraphQL-based API for mobile clients. Maintained legacy core services.

Developed a GraphQL API service for a CRM system from scratch, including database and protocol design. Wrote behavior tests, supported CI, and mentored developers.

Encoded probabilistic formulas with Elixir, optimized mathematical computations, and modeled user sessions as processes and state machines. Built admin reports, statistics, and analytic tools.

Collaborated on creating company's Elixir development standards, implemented backend for video recording, and designed and built a project from scratch as an example for future projects.

Implemented backend for chat and conversation rooms, added localization/internationalization support, and implemented push notifications for multiple platforms. Built a sophisticated logging system.

Designed and implemented a formulas and validation rules runner backend application to calculate bet limits for different countries. Optimized computational resource allocation.

Migrated a project from PHP/NodeJS/Nginx/Varnish/MongoDB to Elixir/MySQL, added localization support, and integrated with third-party social platforms and business messengers.

Supported and modified existing codebase and database, built a separate authorization server, and communicated with customers.

Developed backend for a pediatric mobile application, implemented protocols, developed web UI for admin panel, and handled deployment.

Developed multiple backend applications from scratch, including an air flight tickets metasearcher, a concurrent bot parser, a call-center management system, and a CRM system. Implemented monitoring, logging, and statistics subsystems.

Master of Engineering in Automatic Control of Technological Processes from Odesa State Academy of the Refrigeration, Ukraine, from 2005 to 2010.