Denis Isaev Email & Phone Number

Moscow, Ru

Supporting organization building foundation of Yandex Cloud (public cloud like AWS):- network virtualization and network services: VPC, NLB, ALB, DNS, etc- compute virtualization (EC2-like)- network block storage (EBS-like)- public APIs: cli/api/sdk/terraform- internal developer experience

At Yandex Go (internationally as Yango), I was leading the tech strategy for a $10bn+ annual GMV ride-hailing (Uber-like) service, managing 8 million+ daily rides via an 800+ microservice backend.Have led improvement of overall business reliability (uptime) from 99.9% to 99.99% by: setting strategy & vision, integrating SRE practices, building a reliability infrastructure, hiring & training a reliability team, redesigning the system (e.g., start transitioning to DOMA and pubsub), enhancing observability, establishing incident management, and more.

Supporting 13 product and 2 infra teams in backend of Yandex Go (Yango) and Scooters. Leading software integration and due diligence in M&A of Wind https://techcrunch.com/2021/10/12/russian-tech-giant-yandex-expands-israeli-footprint-with-acquisition-of-winds-tel-aviv-operations/

Scaling product backend engineering from 3 to ~10 teams. Supporting teams to launch from 0 to 1: super app, A/B testing platform and company-wide cashback.Leading performance optimization of Yandex Go application: -2.4s p50 main screen loading time.

Scaling team from 4 to 12 backend developers. Examples of launched features:1. passenger location for drivers - http://actualapple.com/yandex-taxi-allowed-users-to-show-their-location-to-drivers/2. driver fatigue monitoring - https://eng.crownmedia.su/2018/05/28/yandex-taxi-introduces-a-system-for-monitoring-driver-fatigue/

Supporting backend (go) and frontend (react, redux, typescript, javascript) team at BeepCar.BeepCar is carpooling platform and it was acquired by BlaBlaCarhttps://venturebeat.com/2018/08/06/blablacar-acquires-russian-carpooling-platform-beepcar-from-mail-ru/

Launching backend for startup BeepCar from the 0 to 1 and supporting backend team. Using OpenStreetMap, ElasticSearch and mysql at core.

1. Reducing number of frontend machines by 30% (saved 110 machines) by optimizing code2. Decreasing message metadata database timeout failures rate by 2 times3. Raising the quality bar in a team: introducing unit tests, functional tests, fuzzy testing, sanitizer and valgrind testing, static analysis.

1. Launching from 0 to 1 new emails storage on scale of 10 petabytes and 4000 servers. The launch was performed without any errors on production. Using C as a programming language.2. Optimizing 3x latency of service responsible for attached to email files.

Supporting highly scalable backend servers with 11k RPS: debugging core-dumps, fixing bugs, adding features. Supporting nginx mail proxy module.Decreasing 10x failure rate on primary API (messages list) by switching to new database.

Master Of Engineering And Technology, Computer Science

Bachelor Of Engineering And Technology, Computer Science

Education record