OneMarketData — a US-based market data provider (clients include some of the largest banks, hedge funds, and exchanges worldwide; English communication)Responsibilities:- Monitoring our product running on Kubernetes for multiple clients, including a number of VIP clients (Kubernetes, Grafana, Airflow)- Preventive troubleshooting, identifying bottlenecks, improving performance, workflow automation (Git, Gitlab, Airflow)Achievements:- Improved our team's workflow by developing multiple custom tools to automate everyday tasks (Bash, Git, Gitlab, Kubernetes)- Thoroughly investigated performance issues and provided suggestions on improving some operations' performance up to 8x (AWS, Linux)- Resolved numerous issues at the intersection of infrastructure and application level, including one that no one could figure out for months (AWS, Terraform)- Significantly improved our monitoring tools and processes (Grafana)- Handled issues and tasks that required collaboration across multiple teams (communication, broad expertise across adjacent areas, problem ownership)

Planeta Second Hand — a multinational apparel chain store (100 shops in 40 cities all across western Russia; English-speaking management)Responsibilities:- Designing and managing all IT infrastructure (with Linux everywhere except user PCs): ERP, VoIP, network, VPS for our website, DNS registration and administration, anything related to IT- Remote user support and troubleshooting- Handling all IT-related tasks regarding opening new shops: purchasing and deploying all infrastructure, optimizing equipment costs- As the head branch, advising other branches on various IT matters- Negotiating with various service providers, managing services and invoices, assisting third-party supportAchievements:- Designed, deployed and expanded our branch's infrastructure from a small office (15 users) to 50 users in HQ and 50 shops across 5 regions- Provided reliable 24/7 remote support to over 100 users- Took ownership of some non-IT responsibilities where I could be more efficient than others, e.g. managing mobile plans

Speedyline — an ISP providing cable Internet access to multiple towns and villages in Moscow regionResponsibilities:- Client support and troubleshooting (complex cases)- Configuring and managing network equipment- Training recruitsAchievements:- Learned a lot about managing large networks while configuring and managing network equipment- Became the guy other support engineers came to for advice, handled clients with "complex" problems- Trained recruits — one of them was promoted to a network engineer for that ISP just after I left