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Kacper User

@kacperuser

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I build reliable cloud platforms, CI/CD pipelines, and developer tools that accelerate engineering teams.

Poland

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What I'm looking for

I'm looking to build reliable cloud platforms, CI/CD systems, and developer tooling that help engineering teams ship faster, with strong automation, observability, and practical systems design.

At Bloombert, I build platform capabilities that make delivery faster and more reliable across 30 AWS accounts. I designed Terraform/Terragrunt modules that cut provisioning time by 40% and refactored Jenkins pipelines to reduce median build time from 28 to 9 minutes.

I also built a Go API for ephemeral QA test clusters, reducing setup from hours to 12 minutes, and improved CI reliability with Docker-based test sandboxes. My OpenTelemetry and ELK/Kibana work helps teams detect deployment regressions sooner.

Previously at PwC, I owned CI/CD for data pipelines, increased daily deployments from 2 to 12, and reduced batch processing runtime from five hours to 90 minutes. At Globant and Hyland, I built backend services, improved worker throughput and reporting performance, and strengthened operational practices.

I enjoy applying systems design and practical automation to help engineering teams ship reliably. I mentor engineers on infrastructure-as-code patterns, contribute to incident response and postmortems, and focus on secure, observable cloud systems.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Bloombert

Jan 2023 - Present (3 years 8 months)

Designed and owned Terraform/Terragrunt organization layout and modules, reducing environment drift across 30 AWS accounts and speeding provisioning by 40%. Diagnosed Jenkins pipeline bottlenecks and refactored pipelines to cut median build time from 28 to 9 minutes.

Terraform Terragrunt Ansible AWS Jenkins Docker OpenTelemetry ELK Kibana PostgreSQL

Senior Data Engineer

PwC

Jan 2020 - Jan 2023 (3 years)

Owned CI/CD workflows for internal data pipelines using Jenkins and Docker, improving daily deploys from 2 to 12 and stabilizing deployments. Automated infrastructure provisioning for ETL jobs with Terraform and Terragrunt across AWS accounts, cutting manual steps by 70%.

Jenkins Docker Terraform Terragrunt AWS Python Go Prometheus Grafana Clickhouse MongoDB PostgreSQL

Senior Software Engineer

Globant

Jan 2017 - Jan 2020 (3 years)

Built backend services and internal admin tools in Ruby and Ruby-on-Rails supporting analytics workflows and job orchestration. Migrated monolithic worker queues to Sidekiq clusters and introduced monitoring with ELK, improving worker throughput by 3x.

Ruby Ruby on Rails Sidekiq Docker Terraform AWS Elasticsearch PostgreSQL Webpack Git

Software Engineer

Hyland

Jan 2014 - Jan 2017 (3 years)

Developed web application features and backend services in a .NET/C# stack and maintained integration points with SQL Server. Automated repetitive deployment steps with PowerShell scripts and introduced basic Docker-based test containers for QA.

C#.NET SQL Server PostgreSQL Docker PowerShell ELK Jenkins