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Infrastructure / DevOps Engineer

Seulgi Choi

I turn complex infrastructure into simple, automated systems, with hands-on experience in enterprise environments and a strong focus on reliability, communication, and continuous learning.

Experience
6+ years
Enterprise Systems
Location
Aachen, Germany
(Open to Relocation)
Education
B.Sc. Information & Communication Engineering
Work Authorization
German Permanent Residency
(No Sponsorship Required)
Languages
English (B2) · German (B1) ·
Korean (Native)
Availability
From July 1, 2026

Core Skills

Technologies and areas I work with in infrastructure and DevOps

Infrastructure

Built and configured Linux-based enterprise environments across middleware and systems.

Linux / Unix
Apache · Tomcat · JBoss · JEUS
Air-gapped Environment Setup
Installation & Troubleshooting

Database

Supported database setup, migration, and basic data handling in enterprise systems.

MySQL · PostgreSQL · Tibero · MSSQL
Installation & Migration Support
Backup / Basic HA Concepts
SQL / PL-SQL

DevOps & Automation

Built automation workflows to improve deployment consistency and reduce manual effort.

CI/CD (GitLab · GitHub Actions)
Docker · Kubernetes (Basic)
Terraform
Monitoring (Prometheus · Grafana)

Security

Integrated authentication systems and supported secure configurations.

FIDO · OTP · SSO Integration
Database Encryption Support
Access Control
Authentication Systems

Career Journey

A quick overview of my career path and progression

Work
Education
Cert

Work Experience

From enterprise infrastructure to DevOps automation, focused on reliability, security, and scalable systems.

Apr 2024 – Present

Software Engineer (Infrastructure / Platform)

QuinLogic GmbH · Aachen, Germany

Reduced manual deployment effort and improved system reliability by automating release workflows and integrating secure authentication systems.

  • Automated deployment workflows using Windows-based batch scripting
  • Implemented OAuth2 authentication and integrated Keycloak in container-based environments
  • Built automation for database data generation from Excel/CSV pipelines
  • Resolved application-level issues in C# environments with dev team collaboration
Mar 2023 – Mar 2024

Infrastructure / DevOps Engineer

RaonSecure · Seoul, South Korea

Stabilized enterprise environments across 15+ projects by integrating authentication systems and standardizing infrastructure operations.

  • Integrated FIDO and OTP authentication into enterprise systems
  • Supported database and middleware (WAS) environments across multiple clients
  • Executed disaster recovery (DR) tests and maintained Linux servers
  • Standardized test environments to reduce repetitive operational workload
Oct 2018 – Apr 2022

Infrastructure Engineer

Dream Security · Seoul, South Korea

Built and operated secure infrastructure in enterprise and air-gapped environments, reducing deployment time by 70% through automation.

  • Operated Linux-based infrastructure (OS, WEB/WAS, DB, SSL)
  • Automated provisioning using shell scripts (≈70% faster setup)
  • Performed DB migration, encryption, and HA operations
  • Delivered security-critical systems (FIDO, encryption) under strict deadlines

Let’s Talk

I’m open to Infrastructure / DevOps opportunities.