Theodore – React, Typescript, Golang

A suite of products that helps you find the best candidates and hire them fast with the optimal process.

• Implemented & overhauled the React front-end, including major speed, security, user experience and DevOps improvements. Here are some examples:
• loading speed was dramatically increased by implementing good code splitting practices, lazy loading large bundles and reducing JavaScript footprint;
• security was improved by carefully investigating state management and writing playwright tests to ensure unauthorized endpoint protection;
• boosted NPS score for user experience by making use of Hotjar and monitoring pain points of users.
• Lead the initiative to hold UX reviews twice-weekly to focus on serving the best experience for our users;
• Developer operations were also greatly improved by further splitting the front-end into multiple yarn workspaces, and creating a reliable common library of components and best practices to use;
• Lead the initiative to migrate a large amount of computational business logic to the backend (where it always should have been).

Other accomplishments:

• Optimized the sign-up process and increased conversion rate from ~30% to 89%;
• Increased test coverage;
• Performed a major refactor of the back-end Go code;
• Wrote playwright e2e tests;
• Completed several end-to-end tasks - ideation, design, and implementation of concepts;
• Wrote technical documentation for much of the codebase;
• Implemented new GitHub CI actions for better PR validation;
• Proactively tested changes;
• Working with product and design teams to create new features from the idea stage to completion on the front end and back end.

A world-famous CRM. I worked specifically on user sign-up. The sign-up team is focused on improving the sign-up service, which deals with 6-digit numbers of requests every day. My goal was to increase the number of successful sign-ups daily, mitigate malicious requests while not affecting the usability of regular people, and migrate a lot of the front-end logic to the back-end.

• Increased the number of successful sign-ups every day by 17%;
• Mitigated 100% of detected malicious requests;
• Migrated 9k lines of front-end logic to the back-end;
• Implemented a Kafka queuing system for downstream stakeholders for sign-ups data;
• Worked with several teams to understand each of their requirements.

A concurrent, multipart file transfer and self-hosted storage solution written in Go. It is a fully comprehensive suite with more features than Google Drive. A core feature is the ability to recover a failed file transfer and continue where you left off. This is achieved by high-speed data splitting, similar to that of BitTorrent. Unlike BitTorrent, however, Synche can be privately self-hosted and managed by individuals.

• Created front-end and back-end architecture;
• Wrote the API and documented it in OpenAPI;
• Built an interface for the front end to interact with the back end;
• Designed and implemented the SQL database structure;
• Implemented caching of data and requests in Redis (and Gocache);
• Wrote unit, integration, and e2e tests;
• Integrated the back-end with file (fuse) and FTP protocols;
• Wrote documentation for every feature and aspect of the software, including a user guide and video.

Built a video hosting platform and beautiful front-end from the ground up. The video hosting platform runs an API service on a small distribution of CentOS and Ubuntu servers and is interfaced by a UI written in Svelte. It serves 1.5+ million monthly requests of more than 12 terabytes of data.

• Designed and developed the front-end and back-end;
• Designed and implemented the database structure;
• Wrote the back-end API in Go;
• deployed the software on an array of different servers, AWS, Hetzner, and DigitalOcean;
• Tested the system thoroughly;
• Debugged and resolved issues;
• Improved reliability and performance when dealing with large amounts of requests;
• Implemented caching for hard-drive data and HTTP requests.