~/mateusz-oleksy

guest@mateusz-oleksy:~$ whoami

Mateusz Oleksy

DevOps Engineer · IBM Software Lab Kraków · M.Sc. Teleinformatics (ICT) @ AGH

M.Sc. student in Teleinformatics (ICT) at AGH UST, working in a DevOps capacity at IBM Software Lab Kraków (Software Developer Intern), now on the OpenSearch team. On watsonx BI I ran OpenShift fleets, hardened cluster security and built internal automation, backed by a networking background in QUIC, WebRTC and TCP/IP. Currently building a Kubernetes-native QUIC load balancer and firewall with eBPF/XDP.

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~/experience $ kubectl get roles -o wide

NameRoleSinceStatusProducts
ibm-opensearch Software Developer Intern · DevOps 2026-10 Running OpenSearch
ibm-watsonx-bi Software Developer Intern · DevOps 2026-01 Completed watsonx BI, Cloud Pak for Data

OpenSearch · Software Developer Intern

IBM Software Lab · DevOps responsibilities, part-time · Oct 2026 – present

  • Onboarding into the OpenSearch team, taking on its DevOps responsibilities.

watsonx BI · Software Developer Intern

IBM Software Lab · DevOps responsibilities, part-time · Jan 2026 – Oct 2026

19custom Kyverno policies enforced
10+microservices hardened
< 1 monthto remediate and harden them
  • Operated multi-cluster on-prem OpenShift environments: installs, version upgrades, and node-level troubleshooting; deployed platform tooling such as Argo CD.
  • Handled incidents during cluster upgrades and monitored cluster health with Prometheus and Alertmanager.
  • Enforced 19 custom Kyverno validation policies, rolling out Pod Disruption Budgets and read-only root filesystems across services to keep them available during cluster updates.
  • Led container vulnerability remediation and image hardening across 10+ product microservices in under a month.
Show all 10 highlights
  • Refactored and fixed bugs in a Go service that automates image and configuration sync from SaaS to on-prem deployments.
  • Built a full-stack telemetry tool (Python, Django, Vite, IBM Carbon) tracking deployed versions across distributed on-prem and SaaS environments.
  • Automated CI/CD pipeline status reporting across the organization's repositories with Bash.
  • Developed Ansible playbooks and resilience health checks for custom Kubernetes Operators.
  • Conducted performance testing and benchmarking to produce product sizing data.
  • Refactored Jenkins build-report analytics and its UI; stabilized flaky Selenium E2E suites.

~/projects $ ls -l

M.Sc. thesis · in progress

Adaptive QUIC Load Balancer & Firewall

A Kubernetes-native QUIC load balancer and firewall. An eBPF/XDP data plane runs on every pod alongside an in-pod source of truth; a Go operator acts as the control plane, and an intent plane (Python backend, JS frontend) lets users declare policies that adapt to live traffic telemetry.

  • eBPF/XDP
  • Go operator
  • Python
  • JavaScript
  • Kubernetes
  • QUIC

B.Sc. thesis

Collaborative WebRTC IDE

Real-time collaborative IDE with a custom CRDT engine. P2P DataChannels for small groups with automatic fallback to a mediasoup SFU; end-to-end encrypted (ECDH, AES-256-GCM, DTLS-SRTP), with code executed in a sandboxed Judge0 engine.

  • Node.js
  • WebRTC
  • mediasoup
  • Docker
  • PostgreSQL

~/stack $ cat stack.yaml

Cloud native
  • OpenShift
  • Kubernetes
  • k3s
  • Argo CD
  • Kyverno
  • Helm
  • Docker
  • Ansible
  • Jenkins
  • GitHub Actions
  • CP4D
  • Instana
Linux & systems
  • eBPF
  • XDP
  • RHEL / UBI
  • Prometheus
  • Alertmanager
  • CVE patching
  • Bash
Networking & security
  • QUIC
  • WebRTC
  • mediasoup
  • TCP/IP
  • UDP
  • SDN
  • Wireshark
  • ECDH / AES-GCM / DTLS-SRTP
Languages
  • Go
  • Python
  • C
  • C++
  • Java
  • TypeScript
  • Node.js
  • SQL
  • ARM/AVR Assembly

~/education $ cat education.txt

  1. Feb 2026 – present
    M.Sc. Teleinformatics (ICT)
    AGH University of Science and Technology

    Advanced network security, cloud-native systems, distributed systems.

  2. Oct 2022 – Feb 2026
    B.Sc. Electronics and Telecommunications
    AGH University of Science and Technology

    Thesis: Design and implementation of an IDE using WebRTC technology.

~/activity $ git log --since="1 year ago"

fetching contributions…

~/terminal $ exec -it guest -- /bin/sh

Type 'help' to list commands. Tab completes, ↑/↓ walks history.

~/contact $ cat contact.txt

languages English (C1) · Polish (native) · German (A2)

off-duty Photography (Fujifilm X) · DIY electronics & PCBs · 3D printing · Badminton · Running · Guitar & ukulele