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Hi ! I am Nicolás

Nicolás Serbin

Senior Cloud Engineer at OLX

Senior Cloud Engineer focused on building secure, scalable, and automated cloud platforms. I am passionate about continuous learning, from production systems to my self-hosted Kubernetes cluster. My goal is to leave a lasting impact through technology, knowledge sharing, and helping others grow.

Certifications

AWS Certified Solutions Architect – Associate
AWS Certified Developer – Associate

Skills

Experiences

1
OLX

April 2024 - Present

Lisbon, Portugal

OLX operates as a sophisticated global digital marketplace, specializing in localized trading of a diverse array of products and services, ranging from electronics to real estate, empowering millions to buy, sell, and connect within their communities effortlessly. As part of the Business IT team, I manage critical infrastructure components such as SAP, Boomi, and GitLab.

Senior Cloud Engineer

April 2026 - Present

Responsibilities:
  • Lead SAP infrastructure audits, translating findings into actionable remediation plans that strengthen security, compliance, and operational resilience.
  • Own DNS operations and deliver reliable, scalable solutions that support evolving business and infrastructure requirements.
  • Drive Infrastructure as Code initiatives with Terraform, building reusable and maintainable foundations for cloud services.
  • Design and implement serverless automation with AWS Lambda and Python, reducing manual effort and enabling solutions that scale over time.
  • Automate and standardize CloudWatch log collection and monitoring with Ansible, improving observability and incident response capabilities.
  • Plan and execute upgrades for the self-hosted GitLab platform, enhancing its security, reliability, and long-term maintainability.
Mid-Senior Cloud Engineer

April 2024 - April 2026

Responsibilities:
  • Automated operational tasks using AWS Lambda and Python (e.g., DNS checks, GitLab user management).
  • Provisioned and administered SAP instances and self-hosted infrastructure.
  • Designed and implemented AWS backup strategies to ensure data integrity and availability.
  • Refactored Terraform codebase to improve stability, security, and cost efficiency (FinOps).
  • Authored technical documentation to support knowledge sharing and process consistency.
  • Guided a colleague as a buddy throughout 2024, supporting onboarding, growth, goals and project delivery.
  • Led the upgrade of the entire SAP infrastructure landscape during 2024.
  • Directed a comprehensive ransomware audit, assessing infrastructure resilience and recovery readiness.

Freelance

August 2026 - Present

Remote

I provide one-on-one DevOps and Cloud Engineering training for private students, tailoring each course to their goals, experience, and learning pace.

DevOps & Cloud Engineering Instructor

August 2026 - Present

Responsibilities:
  • Design personalized learning paths based on each student’s needs and professional goals.
  • Teach Linux, Python, AWS, CI/CD, GitHub, GitLab, observability, Docker, and other DevOps and cloud engineering topics.
  • Deliver hands-on lessons and practical exercises focused on real-world scenarios.
2

3
Naranja X

February 2023 - January 2024

Buenos Aires, Argentina

Naranja X is a recognized fintech company, that offers financial inclusion to many people within the Argentine territory. I am involved in the “WIRU Pipeline” project. It’s hosted on Gitlab and predominantly written in Bash and Python.

Senior CloudOps Engineer

February 2023 - January 2024

Responsibilities:
  • Create & Maintain the Jobs made in Python & Bash.
  • Creation of Helm Templates that can support multiple versions of Kubernetes clusters.
  • I also optimized the testing jobs to streamline and standardize the process.
  • I developed Python scripts employing the boto3 library to perform batch deletion of specific files using regex patterns in the company’s S3 buckets.
  • Furthermore, as part of our RDP strategy, I implemented a Gitlab-CI Self-Hosted instance on an EKS Cluster.

Digital House

September 2021 - Present

Buenos Aires, Argentina

Digital House is a leading EdTech company in Latin America, offering premium IT career paths and training programs. I’ve been part of the DevOps team, contributing across different seniority levels from execution to leadership.

Technical Lead DevOps Engineer

January 2024 - Present

Responsibilities:
  • Led the analysis and optimization of EC2 and RDS resources, achieving significant cost savings through resizing and decommissioning underused services.
  • Upgraded the Terraform AWS provider to version 5.x, ensuring compatibility across all modules.
  • Oversaw the architecture and evolution of core infrastructure, aligning with business needs and DevOps principles.
  • Managed and guided a team of 2 DevOps engineers, fostering a culture of automation and ownership.
Mid-Senior DevOps Engineer

January 2022 - January 2024

Responsibilities:
  • Led the migration from GitLab CI to GitHub Actions.
  • Created automation scripts to apply large-scale changes across GitLab and GitHub repositories.
  • Built and maintained Infrastructure as Code using Terraform in AWS.
  • Designed, deployed, and operated Kubernetes clusters.
  • Implemented RDS monitoring in Grafana for improved observability.
  • Developed Python scripts with boto3 for tasks like S3 cleanup and VPC peering creation.
  • Automated DevOps onboarding by scripting the installation of all required tooling.
  • Mentored and trained 2 junior team members, helping them onboard into DevOps best practices.
Junior DevOps Engineer

September 2021 - January 2022

Responsibilities:
  • Migrated on-premise environments to AWS (EC2, ALB, S3, VPC, RDS, IAM).
  • Designed and implemented monitoring for AWS Lambdas using Datadog.
  • Developed Serverless Framework templates for standardized deployments.
  • Generated documentation for multiple projects and processes.
4

5
MercadoLibre

November 2020 - August 2021

Buenos Aires, Argentina

MercadoLibre is widely recognized E-Commerce company in LATAM.

Technical Support Application - SMO 1.5

July 2021 - August 2021

Responsibilities:
  • Reviewing and generating all the SMO Documentation.
  • Management of resolution teams.
  • New hires training.
Technical Support Application - SMO SPOC

March 2021 - June 2021

Responsibilities:
  • Metrics Monitoring.
  • Data normalization in Jira Tickets.
  • Writing documentation for SPOC cell.
Technical Support Application - SMO 1.0

November 2020 - February 2021

Responsibilities:
  • Metrics Monitoring.
  • Analysis and resolution of incidents.
  • Give internal clients technical support with Jira Service Desk.
  • Leading War-rooms events.

Education

IFTS N°18
March 2020 - August 2021
Systems Analyst

Languages

Spanish

Level: Native

English

Level: C1

Portuguese

Level: A1

Projects

Ansible
Ansible
Owner December 2020

Ansible Playbooks i made for my VMs and PCs.

Python
Python
Owner October 2020

Regular Expression functions to help me find specific values.

Python
Python
Owner December 2020

A Python Script to check System info (CPU, Disk, RAM, IP).

Python
Python
Owner December 2020

A Script to generate strong passwords.

Python
Python
Owner November 2020

The challenge i made to join MercadoLibre.

Python
Python
Owner August 2023

Scripts i made to change massively repos & other stuff in github.

Python
Python
Owner August 2023

Scripts i made with Python & boto3 library to perform s3 api calls in AWS.

Shell
Shell
Owner August 2023

Scripts i made with Shell to perform s3 api calls in AWS.

Recent Posts

Courses

Introduction to Cybersecurity
EducaciónIT August 2019

Introductory course providing an overview of threats, common attacks, and best security practices.

Introduction to Databases and SQL
EducaciónIT August 2019

Basics of relational databases and SQL language for querying, inserting, and managing data effectively.

Introduction to Linux
EducaciónIT September 2019

Fundamentals of the Linux operating system, including basic commands, file structures, and navigation.

Introduction to Networks
EducaciónIT September 2019 - October 2019

Introductory networking concepts including protocols, topologies, IP addressing, and OSI/TCP-IP models.

Python for Non-Programmers
EducaciónIT September 2019 - October 2019

Python fundamentals explained from scratch for people with no prior programming experience.

Python Programming
EducaciónIT October 2019 - November 2019

Intermediate Python programming, covering functions, error handling, data structures, and modular development.

Cryptography and Blockchain
EducaciónIT October 2019 - November 2019

Overview of symmetric/asymmetric cryptography, encryption principles, and blockchain applications.

Linux SysAdmin
EducaciónIT March 2020 - April 2020

Advanced Linux system administration services, users, processes, security, and configuration tasks.

Linux Operator
EducaciónIT April 2020

Administrative Linux training covering user management, file systems, processes, networking, and basic services.

Linux Server Hardening
EducaciónIT May 2020 - Jun 2020

Focused on securing Linux environments through hardening practices, configuration, user permissions, and auditing.

HTTPS Protocol
EducaciónIT June 2020

Brief course covering the HTTPS protocol and its role in cybersecurity and encrypted data transmission.

Network Security - Network Hacking
EducaciónIT June 2020 - July 2020

Practical course on network security including sniffing, MITM, scanning, and exploitation techniques.

Ethical Hacking
EducaciónIT July 2020 - August 2020

Covers ethical hacking fundamentals, reconnaissance, vulnerability assessment, and exploitation phases.

Forensic Computing
EducaciónIT July 2020 - August 2020

Course on digital forensic analysis covering evidence collection, investigation techniques and reporting.