Viktor Rozaev

I've been leading the RnD of TractoAI — a modern Data Lake for AI builders, an offering by Nebius. In this role, I led the launch of the product website, documentation platform, and control plane console, as well as a range of custom user interfaces for open-source tools such as Jupyter Notebooks and Docker Registry, and internal systems including a graph orchestration layer.

Built and led a team developing BI product. After market validation the company pivoted the product into internal tooling, and the team transitioned to a new initiative.

I worked on a DataLens BI tool, firstly as and individual contributor and then as team lead. My key achievement on this position is releasing the core of our service to opensource https://datalens.tech. Open-sourcing an entire service is a uncommon and ambitious project and I was there during all stages - architecture design, project management and development. That project give me an unique tech and management experience, and I take great pride in having contributed to its success.

Developed a lot of different functionality and A/B tests for MagicLab group web applications (Bumble, Badoo and others, 450+ million users). Participated in the development of Bumble Web from scratch. Achievements: – Introduced reusable components and utils across for all web applications – Introduced type-safe implementation for Google Protobuf RPC – Introduced unit testing for important business logic on the client side – Applied vertical slice architecture approach to the existed codebase

I'm developed interface of automated, auction-based system for placement of text-based advertising named "Yandex.Direct". My main responsibility was to rewriting an existing web application to a new technology stack and implement new product features. Aside of that I got a chance to develop good soft skills by onboarding new developers, participation in job interviews and communication with another departments. Achievements: – Successfully launch new interface side-by-side with existing one. – Setup CI and changed the release process by introducing deploy of the static files to CDN. – Introduced a e2e testing to development process (setup base infrastructure, taught people how to write tests).

I developed a UI JavaScript SDK and maintain infrastructure - build system, test system, CI integration. APS JS SDK has a host and client parts, where the host set up common UI, navigation, and isolation of client applications from each other. The client part provides a rich set of visual components and additional modules for writing applications of varying complexity. Achievements: – Reach 100% code coverage for public API. – Significantly speedup existed tests. – Provide default solution for testing applications which used APS JS SDK.

Duties: development of web applications from scratch. I did client development (UI Components and SPA), backend development (integration with third-party systems, API design implementation) and administration (setup production environment and autodeploy).

Duties: Support of existing infrastructure of hardware servers and OpenVZ-based containers. Initial setup and support different application in production mode: CI systems, version control systems, scientific software, and various user applications (IDE, remove desktop clients, etc).