Denislav Tsonev

DevOps / Cloud Engineer

denislav@cloudymountains.cloud https://cloudymountains.cloud Sofia, Bulgaria
Profile

Summary

Experienced DevOps and Cloud Engineer with over 15 years of experience designing, implementing, and managing scalable, secure, and automated cloud infrastructures. Specialized in AWS architecture, Infrastructure as Code, CI/CD, and container orchestration. Passionate about building resilient systems through automation, GitOps, and modern DevOps practices.

Experience

Senior DevOps Engineer 03/2026 – Present
Nicoya Health — AI first Healthcare
Sofia, Bulgaria
  • Designing and implementing CI/CD pipelines using GitHub to automate build, test, and deployment workflows across all environments.
  • Provisioning and managing cloud infrastructure on Azure using Terraform, ensuring repeatable, version-controlled infrastructure.
  • Managing DNS, CDN, and edge security through Cloudflare, including WAF rules, routing, and certificate management.
  • Establishing infrastructure best practices and security baselines suitable for a regulated healthcare environment.
Senior DevOps Engineer 08/2024 – 03/2026
EnduroSat — Aerospace infrastructure manufacturing
Sofia, Bulgaria
  • Building a centralized DevOps platform to enable all development teams to deploy applications in a unified and streamlined manner, leveraging EKS (Kubernetes), ArgoCD, and GitOps principles.
  • Designing and implementing Terraform-based automation for infrastructure provisioning, ensuring consistency, scalability, and compliance across multiple environments.
  • Developing and maintaining robust CI/CD pipelines to accelerate delivery while enforcing security and operational best practices.
  • Architecting the monitoring and observability stack from scratch, integrating AWS CloudWatch, Prometheus, Grafana, Loki, and Cortex to provide full visibility into both cloud and on-premises infrastructure.
  • Collaborating cross-functionally with development and operations teams to enhance platform reliability, optimize performance, and streamline deployment workflows company-wide.
Senior Cloud Consultant 09/2023 – 08/2024
Phi Partners — IT Services and IT Consulting
Sofia, Bulgaria
  • Implemented Policy as Code (OPA) and Infrastructure as Code (Terraform) to enforce compliance, reduce cloud costs, and ensure consistent infrastructure provisioning.
  • Applied the "Shift Left" paradigm to integrate cost and compliance checks early in the development lifecycle through Jenkins pipelines, Ansible, and Groovy shared libraries.
  • Designed and implemented an Account Factory for Terraform (AFT), enabling automated provisioning of new AWS accounts through a simple Merge Request (MR) process in GitLab.
  • Customized the AFT workflow to allow users to specify parameters (e.g., account type, infrastructure template) directly in the MR, simplifying onboarding and enforcing standardization.
Senior DevOps Engineer 04/2023 – 09/2023
Via — TransitTech company
Sofia
  • Building and improving the pipelines (Gitlab) and introducing a more standardized way of using those pipelines.
  • Supporting the company's GCP cloud and the migration to AWS.
  • Managing the git server (Gitlab) to refine the usage and reliability.
  • Improving the deployment experience with ArgoCD to a lot of k8s clusters.
Senior Cloud Infrastructure Engineer 10/2022 – 04/2023
SoftwareOne (Former HeleCloud) — Enterprise software and cloud consulting
Sofia
  • Building Kubernetes environments for the internal, newly developed company applications for improving the cloud experience of SoftwareONE clients.
  • Developing deployment strategies (following the GitOps model) for deploying microservices.
Senior Cloud Infrastructure Engineer 09/2020 – 09/2022
HeleCloud — Cloud consulting company
Sofia
  • Improving existing cloud infrastructure (AWS Well Architected Framework).
  • Cloud infrastructure security audits.
  • Processes automation.
Cloud Infrastructure Engineer 06/2019 – 09/2020
HeleCloud — Cloud consulting company
Sofia
  • Building landing zones in AWS cloud for Helecloud clients.
  • CI/CD pipelines to build and deploy terraform IaC and customer applications.
  • Writing terraform modules.
  • Migrating existing workloads (on premise) into cloud.
  • Writing lambda functions.
Site Reliability Engineer 02/2019 – 06/2019
Experian Bulgaria / Musala Soft — Global leader in information and analytical solutions
Sofia
  • Migrating Experian clients into cloud (Experian private cloud, OpenShift on AWS).
  • CI/CD — building and maintenance of Jenkins deployment pipelines.
  • Writing groovy/bash/python scripts for automating day-to-day tasks.
  • Integrating Hashicorp Vault.
DevOps Engineer 10/2018 – 02/2019
Musala Soft — Outsourcing company
Sofia
  • Build/Maintenance of clients OpenShift clusters (Dev, Prod).
  • CI/CD — support developing process, Gitlab, Jenkins pipelines.
  • Maintenance of Sonarqube servers, nexus repositories. NGINX proxies.
  • Ansible playbooks for installing OpenShift, backup and restore procedures.
Integration and Infrastructure Engineer 11/2016 – 11/2018
Musala Soft — Outsourcing company
Sofia
  • Configure and maintenance of Linux servers.
  • Central log management system (ELK Stack).
  • Configuring and maintenance of Asterisk PBX and Kamailio SIP proxy. Create and manipulate call-flow Dialplan. Provisioning and remote configuration of IP phones.
  • Configuring and maintenance of Apache and NGINX servers.
  • Configuration management (Ansible).
  • Gitlab maintenance.
System / Network Administrator 10/2013 – 11/2016
Maxima Bulgaria — Retail company (part of Maxima Groupe)
Sofia
  • Configuring and maintenance of Windows and Linux servers.
  • Monitoring systems: Zabbix (monitor network traffic, servers health, UPS, network equipment), NfSen (inspecting network traffic).
  • Configuring network equipment: VLAN's, VRRP, Firewall (iptables firewall) and Squid web proxy.
Junior Network Administrator 01/2012 – 10/2013
Blizoo Media and Broadband — Internet service provider
Sofia
  • Monitoring the core network (Routers, switches and CMTS) with tools such as HP OpenView, Cacti, Nagios, Zabbix.
  • Supporting corporate clients of Blizoo.
  • Configure and maintenance of access switches for clients.
  • Resolving tickets from first level support.

My Life Philosophy

Faber est suae quisque fortunae

Sallustius

Memento mori

Socrates

Languages

English Advanced

Certification

AWS Certified Solutions Architect – AssociateCredential ID 7NX64RG1EE4EQY94
AWS Certified Solutions Architect – ProfessionalCredential ID 5SKJ1D9KTJR1QQKN
CCNA Switching and Routing

Education

Mechatronics 4.0/6.0
Technical University Sofia
09/2009 – 05/2013
Microprocessors 5.0/6.0
Professional High School of Electronics John Atanasoff
09/2000 – 05/2005

Projects

AWS Community Day 2025 (Bulgaria) 10/2025
Sofia
  • Sharing knowledge with the AWS community
  • Session - Centralized AWS Cross-Account Monitoring
SoftUni session 08/2023
Sofia
  • Session - Self-Service Internal Developer Platform
  • Sharing knowledge with platform builders
AWS@FMI 03/2022 – 06/2022
Sofia
  • Re-occurring course (for 2021, 2022 and 2023) in collaboration with Faculty of Mathematics and Informatics (FMI), Sofia University 'St. Kliment Ohridski'.
  • Presenting to the students a few lectures on different AWS services.
  • Building strong knowledge (according to students feedback) for the cloud technologies with real-life examples.
Innovation Lab 11/2011 – 11/2012
Sofia
  • Project of MobilTel and Technical University of Sofia.
  • Development of home automation system and multisensors networks at home.
  • Integrating smart home solutions with Mobiltel systems.

Hobby

3D Printing. Smart home DIY gadgets, sensors and actuators. Home automation.

Skills

AWS Azure Terraform CI/CD GitHub Actions Kubernetes ArgoCD GitOps OPA GitLab IaC Automation Cloudflare Containers Docker Python Bash Prometheus Grafana Problem Solving Collaboration Communication Adaptability

My Time

  • A Solving problems.
  • B Building things
  • C Learning
  • D Family
  • E Friends and free time.
  • F Good books