Marcin Janiak
Freelance DBA at MCOM
Katowice Metropolitan Area Poland
Summary
👤
Senior🎓
Top SchoolMarcin Janiak is a Freelance DBA and Oracle Database Consultant with over a decade of experience designing and operating mission-critical database environments, primarily in the banking sector. He specializes in high-availability and performance optimization across Exadata, ODA, RAC and Data Guard architectures, and holds an Oracle Certified Master (19c) credential. Marcin has run large-scale fleets—administrating hundreds of databases in Exadata and AIX/RHEL environments—performing patching, RMAN-based backup/recovery, capacity planning, and automation via shell scripting. His background includes senior roles at IBM and ING Tech Poland, where he combined hands-on tuning and troubleshooting with DevOps-style tooling and SCRUM delivery. Based in the Katowice metropolitan area, he brings a pragmatic focus on SLA-driven reliability and disaster recovery planning that balances operational rigor with automation. Beyond core DBA work, he has experience deploying complex enterprise applications (JBoss/Tomcat, IIS/Apache) in regulated healthcare and financial environments.
10 years of coding experience
3 years of employment as a software developer
MSc in Computer Science , specialization in Computer Networks, Operating Systems, and Databases, MSc in Computer Science , specialization in Computer Networks, Operating Systems, and Databases at The Silesian University of Technology
Github Skills (19)
nuget9
dotnet9
facebook9
asp-net-core9
graphql-client9
hotchocolate9
asp-net9
dataloader9
graphql8
azure-service-bus8
resolver8
graphql-dotnet8
rabbitmq8
dotnet-core8
ide8
Programming languages (4)
Github contributions (5)
marcin-janiak/marcin-janiak.github.io
Apr 2020 - Jul 2020
Contributions:34 pushes, 5 branches in 2 months
ReavJM/RateaurantBackend
Aug 2018 - Oct 2018
Contributions:2 PRs, 4 pushes, 4 branches in 1 month
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