Janusz Czeropski
Security-Focused Developer (MDR) — Associate
👨💻 Profile
Security-minded developer and Associate in MDR. I design and ship internal apps, DataHub-style dashboards for licence/telemetry, monthly report distribution, onboarding/expiry alerts for SDMs, and the MDR-LABS backend that hosts analyst tools (TV dashboard, meeting host, threat-hunting apps). Strong with PHP, MySQL, Linux, AWS and SOC tooling; I favour least-privilege, safe input/output, and auditable workflows. I pick things up fast, run self-hosted labs, and turn experiments into reliable automation that teams actually use.
- • Builder & problem-solver: enjoys troubleshooting and turning ideas into production tools that reduce toil.
- • Fast learner: explores options quickly in lab environments; adopts the best fit or builds it.
- • Team player, independent when needed: collaborates closely with SDMs/SOC, comfortable owning projects end-to-end.
- • Pragmatic security: clean inputs/outputs, logging/metrics, least privilege, clear ownership.
🛠️ Core Skills
Security/MDR
Incident triage, enrichment, MDR workflows, logging/observability, stakeholder comms (SOC/IR/SDM).
Programming
PHP (8.x), Bash; data handling, REST APIs, internal web apps.
Data
MySQL, MongoDB; query optimization; reporting/export pipelines.
Cloud/Systems
Linux admin, AWS (EC2, RDS, ELB, VPC, Route 53), Nginx/HAProxy, Tomcat, Salt, Nagios.
Networking/Infra
DNS (Bind9), Postfix, TLS, routing; performance & reliability basics.
💼 Experience
Security Incident Analyst (Associate)
Trend Micro
Cork, Ireland · Jun 2024 – Present
- ✓ Develop the MDR-LABS back-end portal to host internal apps in one place (e.g., TV Dashboard, Next SA Meeting Host, Threat Hunting tools).
- ✓ Build new internal applications for threat hunting and analyst workflows; focus on safe inputs/outputs and structured logging.
- ✓ Partner with SDMs to create onboarding & data tools; surface alerts for expiring customers and pending onboarding.
- ✓ Enhance observability and maintainability of MDR tooling with metrics and clear ownership.
Security Incident Analyst (Graduate)
Trend Micro
Cork, Ireland · Jun 2023 – Jun 2024
- ✓ Created a DataHub-style dashboard for the global MDR team to track license validity and basic telemetry across MDR customers.
- ✓ Built Monthly Distribution for reports — assigned monthly report tasks across global MDR and tracked completion.
- ✓ Supported MDR operations: investigation, enrichment, and case handling with strong stakeholder communication.
Security Incident Analyst (Intern)
Trend Micro
Cork, Ireland · Mar 2022 – Feb 2023
- ✓ Worked on current threats and XDR capabilities; contributed to internal web tooling and automations.
- ✓ Supported corporate web initiatives (content checks and WordPress QA).
Linux System Administrator
FirstClarity (Evolok)
London (Hybrid) · Jun 2017 – Jan 2018
- ✓ Managed AWS (EC2, EBS, RDS, ELB, VPC, Route 53) across UAT/PROD; collaborated with dev teams and clients.
- ✓ Operated Salt, Nagios, Tomcat, MongoDB, HAProxy; documented changes and led weekly updates.
- ✓ Handled hardware onboarding, streamlined deployments, and participated in on-call rotations.
Owner / Systems Administrator (Self-Employed)
Galaxy Digital Networks
Carlow · Jan 2015 – Apr 2018
- ✓ Ran mixed Linux/Windows infrastructure: Postfix, Bind9, Cloudflare, PHP (5/7), Plesk/cPanel/WHMCS.
- ✓ Oversaw >1,200 servers (VPS & bare metal); OpenVZ/QEMU/OpenStack; backups and restores.
- ✓ Administered a /19 IPv4 and /48 IPv6 allocation and core network services across a multi-site datacentre environment.
🚀 Projects
MDR Internal Tools
DataHub dashboard, Monthly Report Distribution, onboarding/data utilities for SDMs, and the MDR-LABS portal.
SETU Esports Website
Built and maintained the society site; organized events and improved engagement.
🎓 Education
Ordinary B.Sc. Cyber Crime & Security
South East Technological University, Carlow
2019 – 2023
Class Rep (2020–2021); President, Esports Society (2020–2023).
Computer Games & Programming
Pulse College, Dublin
2015 – 2016
Achievement of Creativity award; completed capstone game project.
Games & Apps Development
Carlow Further Education
2013 – 2015
Final game project; work experience at Host1Plus (PL → EN web translation).
🏆 Achievements
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🏅
Student Recognition Award (2023) for Esports contributions; founded the society and ran events.
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🎵
TuneMoji Ambassador & Creator — content reached 45M+ views.
Let's Connect
Interested in discussing security automation, MDR operations, or potential collaboration opportunities? I'd love to hear from you.