Filip Gajić
DevOps & Site Reliability Engineer
Novi Sad, SerbiaEU Citizen · No visa sponsorship required
About
My passion for technology started in 2008 with overclocking, hardware tweaking, and writing my first lines of code in Pascal. What began as a childhood fascination evolved into a career.
Starting in system administration with a strong foundation in Linux, I transitioned into DevOps, where I specialize in architecting reliable cloud systems, automating workflows, and solving complex infrastructure challenges. Over the years, I've designed and scaled end-to-end infrastructure across high-stakes industries, including Fintech & Compliance, IoT & Smart Systems, Sports Betting & Gambling, and International Engineering Education.
Whether designing multi-region cloud architectures, streamlining CI/CD pipelines, or mentoring fellow engineers, I am driven by constant curiosity and a hands-on engineering mindset.
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Technical Skills
Cloud Infrastructure
| Amazon Web Services (AWS) |
| Microsoft Azure |
| Hetzner |
| Digital Ocean |
CI/CD
| GitHub Actions |
| Jenkins |
| GitLab CI |
| Azure DevOps |
Containers & Orchestration
Observability
| Prometheus |
| Grafana |
| Alertmanager |
Scripting & Databases
| Python |
| BASH |
| MSSQL |
| PostgreSQL |
Networking & Systems
| TCP/IP |
| HTTP |
| DNS |
| VPN |
| Load Balancing |
| Windows |
| Linux |
| macOS |
Experience
- Spearhead intensive international DevOps engineering programs, accelerating the technical upskilling of cohorts exceeding 30+ engineers in collaboration with major state universities.
- Architect and deliver comprehensive, production-aligned curricula spanning Azure cloud systems, advanced modular Terraform development, containerized environments, automated CI/CD pipelines, and enterprise monitoring frameworks.
- Provide strategic technical mentorship throughout the cloud project lifecycle, enforcing rigorous industry standards for multi-tier application delivery and automated security integration.
- Directed the DevOps technical roadmap, infrastructure scaling, and deployment governance for critical IoT smart metering, fintech payment gateways, and automated commercial vending platforms.
- Designed and executed a zero-downtime migration of core product workloads to Azure Container Apps.
- Developed a highly efficient, declarative infrastructure-as-code (IaC) framework using Terraform, GitHub Actions, and custom Python micro-tooling to guarantee deterministic, multi-environment deployments.
- Established an enterprise-wide observability ecosystem with Prometheus, Grafana, and Alertmanager.
- Engineered automated secure network topologies, implementing dynamic VPN provisioning workflows driven by automated Terraform resource management and custom Python configurations.
- Architected and maintained mission-critical infrastructure within a highly regulated enterprise engineering team focused on financial crime prevention and regulatory compliance systems.
- Automated multi-region cloud topology provisioning across extensive hybrid AWS footprints and local physical environments via optimized Terraform modules and Ansible playbooks.
- Optimized enterprise Jenkins CI/CD execution pathways, improving stability and velocity for high-frequency deployment runs directly into active production environments.
- Successfully coordinated and executed zero-downtime major architectural upgrades for foundational infrastructure tooling including Artifactory, Jenkins clusters, and enterprise GitLab nodes.
- Championed shift-left security testing paradigms by fully embedding vulnerability scanning, open-source license compliance (BlackDuck), and static application code analysis (Veracode) within the core CI/CD engine.
- Formulated, validated, and stress-tested end-to-end disaster recovery (DR) protocols and automated system rollback procedures to safeguard system state integrity.
- Designed and tuned high-throughput CI/CD pipeline infrastructure leveraging GitHub Actions to back a high-scale global sports gaming platform.
- Automated deployment testing, environments teardown, and configuration management pipelines, significantly shrinking time-to-market metrics for new product releases.
- Conducted deep-dive security assessments across staging and production infrastructures, mitigating exposure vectors and hardened systems against attack vectors.
- Developed structured enterprise-grade CI/CD pipelines, release governance patterns, and collaborative Git branching strategies for high-budget multinational clients.
- Eliminated configuration drifts and manual human error vectors by enforcing automated pre-flight checks and post-deployment validation matrices.
- Maintained and optimized core internal developer platform (IDP) systems supporting a scaling workforce of 700+ engineers across multiple fast-paced business units.
- Authored custom system automations and routine operational tooling using advanced Python scripting and Unix shell scripts (Bash).
- Orchestrated corporate DNS routing architectures, corporate secure VPN tunnels, and high-availability internal build systems.
Languages
- Serbian — Native
- English — Full Professional Proficiency