Dario Duvnjak
Verified Expert in Engineering
Software Engineer and Developer
Dario is an experienced and highly skilled software engineer, although he likes to think of himself, first and foremost, as a problem-solver. He specializes in cloud computing (AWS), DevOps, and platform engineering. Dario is a great person to work with and an excellent developer.
Portfolio
Experience
Availability
Preferred Environment
Visual Studio Code (VS Code), Git, MacOS
The most amazing...
...project I've helped develop is a DevOps framework for automated operations, provisioning, and infrastructure management via AWS, Puppet, and Docker.
Work Experience
DevOps Engineer with AWS Expertise via Toptal
Archilogic AG
- Modernized AWS infrastructure utilizing AWS CloudFormation and Pulumi, reducing deployment times by 40% and increasing operational efficiency.
- Enhanced security for AWS resources, implementing best practices that led to a 70% reduction in reported vulnerabilities.
- Supported the attainment of ISO 27001 certification, developing and enforcing stringent security policies that improved data protection.
Lead DevOps Engineer
PitchStone Technology, LLC
- Used CloudFormation and infrastructure as code (IaC) principles to provision and maintain infrastructure. Utilized AWS ECS to run both scalable and highly available web services and short-running tasks. Migrated from MySQL to AWS Aurora.
- Architected and implemented Serverless Solutions for authentication, automation, and security using AWS Lambda. Implemented a custom monitoring and alerting system based on AWS CloudWatch, Lambda, Prometheus, and New Relic.
- Implemented a custom security framework and procedures based on AWS Security Hub, AWS Web Application Firewall (WAF), ECR, Inspector, and Prowler.
- Designed and implemented disaster recovery automation and procedures.
Lead Engineer
Atlantbh
- Performed the containerization of highly available and resilient microservice architecture to run it on the OpenShift platform.
- Planned, designed, and implemented pipelines for automatic building, testing, and deployment.
- Developed a robust architecture for logging, alerting, and monitoring services and infrastructure.
- Worked on enabling DevOps methodology across the whole team, where developers and QA engineers partnered closely with DevOps engineers and were comfortable configuring and scaling the infrastructure, running pipelines, and utilizing the monitoring stack.
AWS Continuous Build/Test/Deploy
Avail Health (via Toptal)
- Set up a fully automated continuous integration system for a Node.js app using Jenkins on AWS Elastic Beanstalk.
- Wrote the complete infrastructure using AWS CloudFormation.
- Implemented autoscaling of services based on application load.
DevOps Engineer
Freelance
- Used Jenkins, Protractor, Mocha, and Grunt to build, test and deploy a Node.js app to AWS Elastic Beanstalk.
- Created a high-availability auto-scalable environment for Magento on AWS.
- Wrote a Packer template and a Puppet module for automatic generation of server images for a Java service on AWS, DigitalOcean, Rackspace, OpenStack, and Docker.
- Automated a deployment procedure for Rails, Nginx, Sidekiq, Redis, and MongoDB app using Capistrano.
- Wrote a Web UI with Ruby and Sinatra for provisioning customized WordPress instances on AWS via Puppet.
Senior Engineer
Atlantbh
- Developed infrastructure for continuous integration and delivery platform.
- Coordinated test-driven development efforts with multiple teams spanning the USA, Europe, and India.
- Wrote integration tests and executed integration testing and analysis.
- Provided performance testing and optimizing of AWS infrastructure.
- Integrated different open-source technologies into both the core product and internal operations.
- Improved existing and wrote new Puppet modules, including contributing to popular open-source modules.
Experience
Tenant | DTK Module
https://github.com/dtk/dtk-provisioning/tree/bootstrapingInstructions on how to run it are available in the README file in the link mentioned above.
Skills
Languages
Bash Script, Bash, Java, Ruby, TypeScript
Libraries/APIs
Puppet.js, FFmpeg, Node.js
Tools
Jenkins, Vagrant, Git, AWS CloudFormation, Puppet, Bitbucket, Amazon Virtual Private Cloud (VPC), GitHub, Capistrano, Packer, Apache JMeter, Apache, NGINX, Sublime Text, Bamboo, Amazon Elastic Container Service (Amazon ECS), Amazon Cognito
Paradigms
DevOps, Continuous Integration (CI), Continuous Deployment, Automated Testing, Agile Software Development
Platforms
Amazon Web Services (AWS), Linux, Ubuntu, Amazon EC2, WordPress, CentOS, Docker, Kubernetes, AWS Lambda, MacOS, OpenShift, Meteor, Magento, Visual Studio Code (VS Code)
Other
AWS DevOps, Cloud Computing, Infrastructure as Code (IaC), Containerization, Pulumi, AWS Cloud Architecture, Infrastructure, DevOps Engineer, Security, Cloud Infrastructure, Cloud Architecture, Web Application Firewall (WAF), Cloud Security, AWS Cloud Security, Configuration Management, Serverless, Gitolite, Kubernetes Operations (kOps), ISO 27001, Amazon RDS
Frameworks
Ruby on Rails (RoR), Spring Boot
Storage
PostgreSQL, MongoDB, MySQL, Amazon Aurora
Education
Bachelor's Degree in Telecommunications
University of Sarajevo - Sarajevo
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