Jourdan – React, Python, Node.js

A healthcare staffing platform that connects travel clinicians with open jobs all over US, and helps facilities fill their staffing needs quickly and efficiently.

• Turned Hygraph data into LD+JSON for SEO, significantly boosting organic discoverability;
• Was a lead CSS expert responsible for intricate asymmetric designs in the rebranding project;
• Built up a plan to improve web vitals metrics.

A no-code paywall management platform, helping clients grow their business using IAPs and subscriptions

• Provided insights on technical decisions and strategies for maintenance and feature development;
• Implemented Multi-Factor Authentication (MFA) with TOTP authenticators, recovery codes, and email;
• Restructured the authentication to reduce the quantity and latency of database queries by 80%;
• Implemented an extensive cache layer on query sets to support millions of requests per minute;
• Enhanced test coverage from 30% to 80%, including E2E tests with Cypress and component tests;
• Optimized database queries for faster endpoints;
• Developed a template architecture for paywalls in iOS, Android, and Web;
• Transitioned JavaScript to TypeScript;
• Simplified complex design patterns and reduced excessive Redux usage;
• Created a React-Query-based API module and utilized React Context for centralized authentication logic.

Team wiki solution with AI suggestions and trackable training to deliver knowledge to teammates at the right time

• Managed over 60 backend microservices (Django/Flask/Node);
• Merged 2 Django projects, resulting in roughly 10x improvement in authenticated HTTP requests;
• Created a proof-of-concept for Flask to Django migration, including MongoDB integration;
• Established a culture of writing tests, reducing production bugs;
• Maintained a mid-scale Slack app, heavily using its API features;
• Improved CI setup and coordinated services for ease of maintenance.

A free-to-use website builder and content management system that creates beautiful web interfaces for three types of academic content providers: institutional repositories, academic journals, and academic conferences. It currently serves over 1,000 repositories, 3,000 journals, and 70 conferences.

• Adjusted all projects to be environment-based, aiming for local environments not to contact production assets (databases, storages, etc.);
• Introduced tests in both frontend and backend;
• Implemented a Docker setup and placed Sentry in production for crash visibility;
• Created a staging environment with Heroku for bug prevention.

An adventure travel company that exists to create sustainable experiences for travelers and local communities.

• Implemented version control (Git) and established a development process;
• Added unit and integration tests, as well as automated deployment;
• Worked on improving web vitals metrics;
• Introduced crash visibility with Sentry;
• Reduced code redundancy, addressing discrepancies and bugs spread over several pages.

A fintech platform for managing ownership and equity with a mission to expand the global ownership graph so that everyone can own a portion of what they have built.

• Implemented user activity tracking with Mixpanel, which resulted in a focus shift based on user behavior;
• Refactored the implementation around onboarding, ending a series of critical crashes that severely damaged the reputation of the product at the time;
• Increased automated testing, going from 30% to 80% in a couple of months;
• Was involved in the migration to a microservice structure.

This experience included contributions to dozens of projects related to such businesses as online marketplaces, music streaming, condominium access management, food picture-sharing social networks, health tracking IoT software, etc.

• Established an app structure to be used across the clients' projects;
• Pioneered automated testing at the company and promoted a CI/CD culture;
• Developed a backend app style guide;
• Trained various teams using Docker, Django i18n, code documentation, and legacy app refactoring;
• Built and established a Git-based deployment.