Sergey Khaladzinski
CTO at The Helios Companies, LLC
New York, United States
Summary
👤
Senior🎓
Top SchoolSergey Khaladzinski is a hands-on CTO in New York with 13 years of experience helping post-MVP fintech startups build and scale regulated products. He blends deep SRE and DevOps expertise—automation with Terraform, Ansible, Jenkins and Chef—with practical experience managing multi-region datastores like Cassandra, Postgres and Mongo in production. Sergey has a strong track record driving migrations and performance work (from legacy CMS to containerized ECS) and has contributed to notable open-source operations cookbooks for Cassandra and Graphite. He focuses on reliability, zero-downtime switchovers and observability, having built automated cluster pipelines and unified monitoring stacks for high-traffic services. Comfortable both setting technical strategy and rolling up his sleeves, he brings pragmatic infrastructure-as-code practices to regulated fintech contexts. An underrated strength is his ability to translate complex migration and compliance needs into repeatable, automated deployment patterns.
13 years of coding experience
8 years of employment as a software developer
B.S., B.S. at State Technical University, Brest, BelarusPerformance Optimization for MySQL with InnoDB and XtraDB, Performance Optimization for MySQL with InnoDB and XtraDB at Percona MySQL training
Stackoverflow
797reputation
885kreached
5answers
4questions
nginx
top-5%
Github Skills (24)
python10
cassandra10
apache10
chef-client10
automation10
infrastructure-as-code10
chef-solo10
automations10
devops10
cassandra-database10
yaml9
rhel9
nginx9
runit8
resolver6
Programming languages (8)
Github contributions (5)
michaelklishin/cassandra-chef-cookbook
Oct 2013 - Jan 2014
Chef cookbook for Apache Cassandra, DataStax Enterprise (DSE) and DataStax agent
Role in this project:
DevOps Engineer
DevOps EngineerContributions:15 commits in 2 months
Contributions summary:Sergey primarily contributed to the automation and configuration of Apache Cassandra deployments using Chef. Their work involved adding support for RHEL, implementing OpsCenter agent integration, and converting package names into variables for flexibility. They also addressed compilation errors and refined service management configurations. Their commits demonstrate a focus on infrastructure-as-code practices and managing Cassandra deployments.
cookbookdseagentcassandraapache
sous-chefs/graphite
Apr 2013 - May 2013
Development repository for the graphite cookbook
Role in this project:DevOps Engineer
DevOps EngineerContributions:9 commits in 29 days
Contributions summary:Sergey primarily focused on integrating uwsgi support within the graphite cookbook, modifying configuration files and recipes to enable its use as a web server. They made changes to attributes, templates, and recipes to configure uwsgi and related dependencies. Furthermore, the user updated the codebase to include basic authentication support for apache, including modifications to the apache configuration files and adding the necessary support in the codebase.
cookbookgraphitechef-resourcemanaged-by-terraformchef
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