Roman Z. Email and Phone Number

NUUM — is a new UGC video platform, specialized in vertical videos (tiktok like), horizontal videos and online streams.My responsibilities include: — resource management (3 product teams, ~40 people): hiring, adaptation, rotation;— development of ADR;— review of technical specification;— consulting business/product on technical implementation of features;— combining the role of Team Lead in one of the teams;— control of task estimates and implementation deadlines.My results are:— launched such commercial features as: affiliate program, bloggers platform, ads (instream, vertical, custom formats), boost, mass messaging;— mass messaging sped up (from 100k/30min to 100k/1min);— optimized product delivery process.Used technologies:— Golang, NodeJS, Java, Python;— kubernetes, argocd, helm;— Postgres, redis, kafka, rabbitmq, vault, S3;— Jira, Confluence, Gitlab.

The project is a system for delivering banking products (credit cards, debit cards, loyalty cards).As a member of a small team (1 PO, 4 golang devs, 1 fronted, 1 qa) I cutted the PHP monolith into GO microservices.My results are:— Developed several microservices from scratch using golang;— Deployed kubernetes (1 master + 1 worker node), configured Ingres and SSL (Let’s Encrypt).— Set up CI/CD in Gitlab: push to dev branch -> build docker image -> upload to ImageRegistry -> roll out to k8s stand— Deployed 7 microservices (Golang), as well as a file database (minio).Used technologies:— Golang 1.19: grpc, gin, sqlc, jwt— Kubernetes 1.23, Postgres, Minio— Jira, Confluence, Gitlab

UGC MS — User Generated Content Management System. I participated in development of a SAAS platform to analyze social networks using parsers.My results are:— hired a team of professionals in 3 months: 1 team lead, 1 system analyst, 4 backend developers, 2 front developers, 1 qa;— created project's technical and feature roadmap together with CPO— implemented Scrum development process in team: sprint planning, tasks estimation, retrospective;— organized DEV and DEMO stands as a devops. DEV is used by developers, while DEMO is used to present product for stakeholder;— organized CI/CD processes for DEV and DEMO stands;— created auto calculation for delivery metrics: t2d (time to DEMO), hold time. Average t2d ~ 7 days, average hold time ~ 2.7 days.Used technologies:— Python, TypeScript + JavaScript— Postgres, Redis, Kafka, Keycloak— ML: Torch, DVC, TensorFlow— Yandex.Cloud, Kubernetes, Gitlab CI/CD, Nexus, EFK— Jira, Confluence, Miro, Draw.io

BAAS (Banking As A Service) — is a platform, which provides an API for banking features for any front app (web/iOS/android/desktop).My results are:— increased IT team from 10 members up to 40 members;— created and implemented Technical Style Guides for backend, android and iOS development;— created and implemented instructions for working in Jira, gitlab, code review process;— created auto calculation for delivery metrics: t2m, hold time. My results are: t2m ~ 19 days, hold time ~ 5.5 days;— platform uptime for last 3 months = 99.4%;— implemented horizontal scaling in k8s, so any services updates come without downtime;— created and implemented resource utilization reports, which helped me to properly plan sprints for teams and showed me problems in teams to work on.Used technologies:— k8s, go, java, python;— postgres, kafka, elk;— kotlin, swift;— bitbucket, Jira, Confluence.

Marvin - is an AI assistant integrated in a smart speaker.My results are:— hired a team of mobile app developers from scratch (senior dev, middle dev, junior dev + team lead);— decreased avg "time to test" metric to 5 days;— used golang to develop mock backend in cases when development of real backend services was delayed;— implemented CI/CD process: unit testing on merge requests, nightly integration tests, weekly iOS and Android builds for regress testing;— implemented Scrum development process in team: weekly sprints, sprint planning, tasks estimation, retrospective.

DrugVokrug — is a classic dating app (was merged with MyFriends).My results are:— merged MyFriends team and DrugVokrug team into one team;— increased cash profit by implementing targeted ads into mobile apps (rewarded, banners and others);— sped down project build time and decreased count of merge conflicts (6 developers worked together on android app) by implementing module architecture.

MyFriends - is a classic dating app.My results are:— took project development from outsource company and organized development process inside company; — implemented code review and CI/CD processes;— reduced the size of the Android application by 2 times by implementing Proguard and removing unnecessary dependencies.

— Mobile apps development from scratch;— Mobile apps support and improvement; — Leading a team of mobile apps developers.