Nik Mostovoy

Messenger and instagram (infra team):

• WhatsApp TL for messenger web and instagram web e2ee messaging;
• Working on an SDK for e2ee messaging based on WhatsApp;
• Keen on PRE metrics (performance, reliability, and efficiency). Significantly improved messaging performance;
• Organized team on-call process, set up monitoring tools, logging;
• Mentored other engs 5+

WhatsApp KaiOS client (product team)

• Introduced instant scrolling. Improved rendering speed from 5-10FPS to 30FPS (hardware limit)
• Adapted and converted WebP format for stickers. Speed up WebP processing for 10 times.
• Created media editor.

I worked in several teams: Search (eng), Mobile WebSite (eng), Talantix (Team Leader) and Architecture team (Lead eng).

• Real-time client performance monitoring, errors tracking;
• Improved 95p of SSR response time from 100 to 60ms;
• UIToolKit maintainer (100+ components);
• Co-led migration from legacy stack to React (30+ pages migrated);
• Set up the architectural team planning process;
• Created unit tests infra (Reached 56% loc);
• Lecturer and mentor in HH developers school. The best lecturer for 4 years according to students surveys;

As Talantix (CRM system for HRs) Team leader:

• Maintained the FrontEnd part;
• Enhanced 85th percentile of team lead time from 38 to 28 days;
• Created many features: analytics graphics, applicant tracking system, calendar
• Mentored people: 2 engs from the team became team leaders

In Search and Mobile teams I was working on business features:

• New vacancy search on a map
• Mobile cv builder
• UIToolKit

I was invited to join JugRu Group as programm commitee member to co-organise HolyJS conferences. I did it in my personal capacity.

• Co-organised 4 HolyJS conferences, trained more than 14 speakers
• Curated performance and browser extension sections
• Was evaluating speakers' proposals, tehnical depth, etc., made more than 100 initial calls

Education:

Master degree in CS. MESI university in 2015 (part of Plekhanov Russian Academy of Economics)

Community

• Speaker
• Tech writer
• Open-source contributor