VK

ENGINEERING PROFILE / 01

VADIM
KOZLOV

Senior Fullstack Engineer

Frontend / Realtime Systems

Building end-to-end products — from interface architecture to APIs, realtime infrastructure and data.

MOSCOW 3+ YEARS COMMERCIAL DEVELOPMENT OPEN TO INTERNATIONAL OPPORTUNITIES

SYSTEM THINKING / 02

FRONTEND IS THE VISIBLE LAYER.

I design with the whole product in mind.

INTERFACE STATE API BACKEND DATABASE

From client architecture and state management to API contracts and data structures, I work across the layers that make the product behave as one system.

01 UI

02 STATE

03 API

04 SERVICES

05 DATA

SELECTED SYSTEM / 03

ERGSTREAM

Realtime platform for synchronized indoor rowing competitions.

LIVE VIDEO WEBSOCKETS REALTIME DATA RACE CONTROL

Designed the product architecture from scratch across frontend and backend. Built race administration, participant management, synchronized starts, live participant camera integration and realtime boat movement visualization.

RACE 04 ATHLETES 04

READY

ROWER_01

ROWER_02

ROWER_03

ROWER_04

Illustrative interface values, not recorded results.

SCROLL TO RUN THE SEQUENCE

EXPERIENCE

2021 — NOW

SEP 2022 — PRESENT

SENIOR DEVELOPER / FRONTEND FOCUS

LEGACY REFACTORING KEYCLOAK / RBAC GRAPHQL / APOLLO PODMAN / HARBOR GRAFANA / SENTRY

Smekalka

Refactored a legacy React, TypeScript and Node.js codebase to improve performance, maintainability and readiness for higher load.

Introduced centralized authentication and authorization with Keycloak and RBAC.

Worked on GraphQL + Apollo Server architecture, schemas, resolvers and query optimization.

Built a container workflow around Podman and Harbor.

Introduced Grafana and Sentry monitoring that surfaced approximately 40% of issues before users reported them.

INCIDENTS GRAFANA SENTRY ~40% DETECTED

~40%

of issues surfaced by monitoring before users reported them

JAN 2024 — PRESENT

SENIOR DEVELOPER

● LIVE

50FPS

Product engineering focused on realtime systems, live video and race control.

ERGSTREAM REALTIME VIDEO CONTROL DATA

MAY 2021 — APR 2022

SOFTWARE ENGINEER

ARRIVAL / ROBORACE CONTEXT

BEFORE REALTIME PRODUCTS, THERE WERE REALTIME SIGNALS.

Automated realtime audio and video production workflows and developed software tools for broadcast environments.

Built a Python + Flask application to automate vMix project preparation, including scenes, sources and configuration.

Built monitoring for connected vMix and TriCaster systems with realtime status and error visibility.

Designed production control environments using NDI, Blackmagic, TriCaster, AJA, vMix, Resolume and UE4.

CAMERA NDI VMIX / TRICASTER AUTOMATION OUTPUT

ENGINEERING TOOLSET / 08

TOOLING ISN'T THE POINT. SYSTEMS ARE.

PROFILE / 09

FRONTEND-FOCUSED.

BACKEND-CAPABLE.

PRODUCT-MINDED.

BUILT FOR REALTIME.

I work best on products where interface quality, architecture and realtime behaviour all matter at once.

CONNECTION READY

LET'S BUILD
SOMETHING
THAT WORKS.

TELEGRAM @mediastarsrt OPEN ↗ GITHUB Xlebabutti OPEN ↗ PHONE +7 999 806-21-77 OPEN ↗

VADIMKOZLOV