Filip Stojanović Email & Phone Number

Prague, Czechia

Niš, Centralna Srbija, Serbia

Completed several freelance gigs, most on sites such as Upwork, Fiverr and Freelancer. For example:Refactoring a Python Selenium web scraper to be deployed on AWS Lambda as a Docker container and ran concurrently through AWS Step Functions with the output stored on a S3 bucketUpdating a PHP website to make use of a newer version of an API with breaking changes in the data format and migrating the existing data in a MySQL database through phpMyAdminCreating a Python script to query data from a Firebase database with advanced filters not natively supported in the SDK by performing several queries then intersecting the result sets

Belgrade, Serbia

Received mentoring as part of "Ultra Office" program for Software Engineer in Python infrastructure role which focused on:Working with Cloud Development Kits in Python to enhance application and infrastructure deployment strategies by having both written in the same programming languageImproving code quality up to industry standards e.g using linters such as flake8 which adhere to the PEP 8 Python coding standard and increasing code coverage with unit testsCreating CI/CD pipelines which streamline the application and infra development processes into one by having the code for both be in one repository and tested & deployed upon each commitImplementing best practices for containerized applications such as making optimized Dockerfiles with multi stage builds

Belgrade, Serbia

Designed & managed cloud architecture ensuring high availability, security and performance. Automated AMI patching process via Python scripts which are deployed using AWS Lambda and Step Functions, shortening more than 3 hours of manual workExecuted up to 15 scripts/deploys per day on infrastructure in a timely manner, driving client satisfaction. Troubleshot operational issues as one of the first responders and sought to reduce incident rateEstablished and documented best practices for common tasks, shortening onboarding time and the time to complete tasks by an hour with improved automation scriptsManaged infrastructure as code with Terraform, where I did tasks such as IP whitelisting, upgrades, adding new resources or importing existing onesMigrated AWS Lambda functions from Python 2.7 to 3.12 and made sure that all functions are managed by Terraform in a central repositoryRefactored several programs in Go which are deployed using AWS Lambda and Step Functions to make a more scalable and future proof solutionHigh level support for a client who is a major player in the tobacco industry, upgraded many worldwide markets with minimal or no downtime for the end users

Niš, Centralna Srbija, Serbia

Operational support for clients in the hosting industry, administration of Linux (Ubuntu and Red Hat based) and Windows Server hybrid IT infrastructure, relational databases (MySQL, PostgreSQL, MS SQL)Scripting (Bash, PHP, Python), configuration management (Ansible), debugging (C#, Perl), web servers (Apache, Nginx and LiteSpeed), infrastructure monitoring (Nagios)Cloud providers (AWS, Cloudflare, Hetzner), CMS maintenance (Wordpress), planned & executed upgrades with minimal downtime for the end usersWrote documentation for many procedures such as configuring services and doing upgrades during infrastructure hand off, provided virtual assistance and automation scripts for following the procedure stepsWrote scripts mainly in Bash but also in PHP to automate tasks around whois, dns, email. Notably a script which cleans up archived let's encrypt certificates and keeps only the live versions, which significantly reduced inode usage on the web serversActively managed firewall software (iptables, fail2ban) to whitelist trusted IPs and keep infrastructure safe from ddos attacks

Niš, Centralna Srbija, Serbia

Improved knowledge at a fast-paced environment in Linux systems and services configuration, learned GitHub workflow, gained insight on the web hosting industry. Managed in house software and did tests using vagrant VMs e.g tested http2 support on serversInstalled new versions of PHP and phpmyadmin on web servers and kept the older versions of PHP available for legacy sites. Wrote a script that installs new equivalents of already installed older packages Configured KernelCare+ repository and installed client on Linux servers, enabling automated patching of the kernel and other packages with security fixes from upstream versions without requiring rebootsConfigured and updated postfix and postfwd, tested sending emails through the mail server using local scripts, roundcube and other email clients after which I made a pull request and switched versions in place, keeping the old version for rollback

Engineer Of Electrical Engineering And Computer Science - Master Applied, Computer Science, 10/10

Learned about advanced IT topics such as ML/AI. Completed various practical projects with a focus on producing higher quality results.

Engineer Of Electrical Engineering And Computer Science - Bachelor Applied, Computer Science, 8/10

Throughout my studies I gained in depth understanding of computer science topics e.g as part of the "Network Services" subject we.

Technician Of Ecology, Chemistry, 4.33/5

Gained foundational knowledge in biology and chemistry through subjects such as inorganic and organic chemistry, analytical chemistry.