Wiktor Kisielewski
I'm a self-taught DevOps engineer who picked up a strong SRE streak along the way. I spend most of my time on infrastructure, CI/CD, and observability, and I lean on GitOps to keep delivery boring. Outside work I build trading systems and fly a drone.
Experience
SRE / Site Reliability Engineer @ XTB
April 2025 - Present | Gdańsk
I work on reliability for XTB's trading services and own the observability stack. I merged a bunch of fragmented monitoring into one metrics/logs/traces setup spanning on-prem Kubernetes, cloud, and bare-metal. I also run incident management and on-call — triage tooling, blameless postmortems, SLOs on the critical paths, and automated runbooks to bring MTTR down.
Notable bits:
- Built an LLM-based log scanner that catches sensitive-data leaks across our services
- Used AI to surface incidents from team chat before anyone formally raised them
- Built an interactive report on alerts, incidents, metrics coverage, and log usage by team
DevOps @ Oper Credits
September 2023 - Present | Gdańsk
Sole DevOps at a fintech lending startup. I run the (mostly Kubernetes) infra, set up GitOps and Terraform/Ansible provisioning, built central monitoring, and led the AWS→GCP migration to cut costs. Also poked at LLM integrations and an internal ChatOps tool.
Notable bits:
- Helped the company pass ISO 27001
- Moved us to git-tag releases and handed routine QA/TEST deploys to the QA team
DevOps / AI Infrastructure Engineer @ SentiOne
November 2022 - September 2023 | Gdańsk
I was part of the team keeping an AI/NLP platform's delivery fast and stable. I automated CI/CD and provisioning (Ansible, Terraform) and ran hybrid on-prem/cloud infra on Kubernetes (vanilla, OKD, Rancher, k3s), plus monitoring, access, and compliance bits.
Notable bits:
- Built a self-healing system that took a real chunk out of on-call
- Introduced ArgoCD + Terraform GitOps — full environments in minutes instead of days
Junior Cloud Engineer @ Allegro Pay
August 2022 - November 2022 | Warsaw
I helped keep Allegro Pay's Azure environments fast and cheap. Built CI/CD, monitoring-as-code (alerts, dashboards), and wired up on-prem to Azure.
Notable bits:
- Built self-service pipelines so non-DevOps folks could run routine tasks themselves
- Built cross-region Azure DNS / private-link sync (Azure Pipelines, PowerShell)
Junior DevOps @ SentiOne
July 2021 - July 2022 | Gdańsk
I helped with hybrid deployments across client clouds and data centers, kept staging stable, wrote monitoring-as-code, ran 24/7 on-call, and looked after core tooling and databases.
Notable bits:
- Unified the monitoring setup and standardized bare-metal Kubernetes provisioning with Ansible
- Ran a multi-TB Elasticsearch cluster
IT/DC Operator @ Wirtualna Polska
February 2020 - June 2020 | Gdańsk
On-call shifts in WP's data centers — monitoring and hardware fixes across thousands of racks.
Education
CODE:ME - Gdansk
Front-End Course
01.2018 - 06.2019 | Gdańsk
Nine-month course covering HTML/CSS through JavaScript and React, plus SEO basics.