Ivan Volynkin Email & Phone Number

Санкт-Петербург, Россия

Санкт-Петербург, Россия

Санкт-Петербург, Россия

Lead up to 30 engineers: developers, QA, SRE engineers, sysadmins.I had cross-component development teams and SRE team.I participate (with CPO) in applying scrum to development teams.I reduced time-to-market from 6 weeks to 2. Under my leadership, we started releasing web app asap instead of one per sprint.The product is SaaS platform with a mobile smart terminal (cash register) and a cloud web application.I was improving high availability: any service has two replicas at least, every DB has replicas. PostgreSQL databases have master-slave streaming replication with slave auto repromotion in case of master fall.We have our own cloud with proxmox clusters, kubernetes clusters. There are about 50 bare-metal servers and 150 VM.I designed and implemented CI/CD system with a very transparent and easy-to-deploy dashboard.I designed an autotesting approach with core, web framework, backend framework, and android framework.When our company had huge troubles with recruitment, I have hired 3 freelancers at upwork.com at 2 weeks.I designed and applied business metrics collection service. Every product manager can construct reports and diagrams easily.I designed and applied service with big data processing.I had up to 100 job interviews.I always help and educate my teammates.

Санкт-Петербург, Россия

My team consists of eight members, all of them are Senior developers.I develop the architecture of our product.I prepare every deployment, and usually deploy backend components myself.I have designed autotesting framework over RestAssured and integrated it to our team.I have worked out a bug solution process to avoid losing tasks and enable the support team to have actual due dates of fixing.Also, I have created a distribution of support processes to the team members mechanism involving bugs control, pull requests control, dev environments control, sentry contol. This mechanism has been applied with other component teams.All of the controversial issues I present to the team members for conversation. Every developer has a vote.I collect new story tasks from project managers and distribute them with my team.I have developed CI/CD process.

Saint-Petersburg

I develop Single Sign On system and other user identity services.Projects, I participate, are used in Cell operators and largest Russian banks.I integrate our systems with other ones over JMS, RESTful API, SOAP etc.I develop RESTFul API, authorization strategies.I'm backend team lead.I decompose business tasks, estimate, and compose functional requirements. Assign technical tasks to developers.I configure CI/CD.

Saint-Petersburg

I created SaaS platform for vehicle aftermarket parts.I lead the development team and all the developing processes.This project had been started as a light startup, written by PHP. But by the time, it has been growing, complex services and storages have appeared.The main service is written with Java. It parses a lot of price list formats, process them and saves them to storage. By client's request, it searches loaded offers and returns with SOAP and WebSocket.The first storage implementation was MySQL. Then we used Cassandra. But the final variant is RDBMS PostgreSQL.Full-text search is implemented with Sphinx and PostgreSQL.For some jobs we use Redis.Microservices were deployed at 2-6 servers at different times.