Over the past several years, I have held senior engineering and leadership roles that combined system reliability, automation, and infrastructure design. As a senior network security engineer, for a client working with banks and insurance companies, i am contributing in an on-premise secure infrastructure at the network, platform and application layers. Using Ansible to automate host management and security best practices as per the French PAMS standard and OWASP. Previously as a Software Engineering Team Lead at Harvest-AI GmbH, I architected and deployed a SaaS platform on AWS, using Terraform and GitHub Actions pipelines for continuous integration and delivery. I managed all layers of our DevOps stack—networking, containerisation (Docker, Docker Compose, ECS) as well as backend (Flask, OpenAPI, Pydantic). Finally during my time at Agricool S.A.S, I oversaw development and operation of production systems bridging cloud and embedded environments. My responsibilities included designing secure Linux network topologies, automating deployments, and maintaining robust monitoring and alerting using (Prometheus, Grafana), and secret management. Earlier, my work at Thales Communications & Security grounded me deeply in Linux systems administration, networking, and high-reliability software engineering, including work on security-critical communication systems. My technical foundation includes: • Linux systems & networking: 10+ years of hands-on experience, from embedded to cloud scale. • Cloud & on-prem infrastructures: AWS, Hyper-V, Debian, Ubuntu. • Automation & CI/CD: Ansible, Terraform, GitHub Actions. • Containerization: Docker, Docker Compose, AWS ECS. • Programming: Python, Bash, Go, C/C++. • Observability: Prometheus, Grafana, centralized logging. I thrive in autonomous and remote environments, having led distributed teams across Europe, defining best practices, mentoring engineers, and ensuring operational excellence under agile frameworks. My background—spanning cloud operations, infrastructure as code, and secure systems engineering—enables me to deliver both the reliability and velocity that modern platforms require. I would welcome the opportunity to bring this blend of technical depth and systems thinking to your team.

Papastefanakis Ermis

Over the past several years, I have held senior engineering and leadership roles that combined system reliability, automation, and infrastructure design. As a senior network security engineer, for a client working with banks and insurance companies, i am contributing in an on-premise secure infrastructure at the network, platform and application layers. Using Ansible to automate host management and security best practices as per the French PAMS standard and OWASP. Previously as a Software Engineering Team Lead at Harvest-AI GmbH, I architected and deployed a SaaS platform on AWS, using Terraform and GitHub Actions pipelines for continuous integration and delivery. I managed all layers of our DevOps stack—networking, containerisation (Docker, Docker Compose, ECS) as well as backend (Flask, OpenAPI, Pydantic). Finally during my time at Agricool S.A.S, I oversaw development and operation of production systems bridging cloud and embedded environments. My responsibilities included designing secure Linux network topologies, automating deployments, and maintaining robust monitoring and alerting using (Prometheus, Grafana), and secret management. Earlier, my work at Thales Communications & Security grounded me deeply in Linux systems administration, networking, and high-reliability software engineering, including work on security-critical communication systems. My technical foundation includes: • Linux systems & networking: 10+ years of hands-on experience, from embedded to cloud scale. • Cloud & on-prem infrastructures: AWS, Hyper-V, Debian, Ubuntu. • Automation & CI/CD: Ansible, Terraform, GitHub Actions. • Containerization: Docker, Docker Compose, AWS ECS. • Programming: Python, Bash, Go, C/C++. • Observability: Prometheus, Grafana, centralized logging. I thrive in autonomous and remote environments, having led distributed teams across Europe, defining best practices, mentoring engineers, and ensuring operational excellence under agile frameworks. My background—spanning cloud operations, infrastructure as code, and secure systems engineering—enables me to deliver both the reliability and velocity that modern platforms require. I would welcome the opportunity to bring this blend of technical depth and systems thinking to your team.

Available to hire

Over the past several years, I have held senior engineering and leadership roles that combined system reliability, automation, and infrastructure design. As a senior network security engineer, for a client working with banks and insurance companies, i am contributing in an on-premise secure infrastructure at the network, platform and application layers. Using Ansible to automate host management and security best practices as per the French PAMS standard and OWASP. Previously as a Software Engineering Team Lead at Harvest-AI GmbH, I architected and deployed a SaaS platform on AWS, using Terraform and GitHub Actions pipelines for continuous integration and delivery. I managed all layers of our DevOps stack—networking, containerisation (Docker, Docker Compose, ECS) as well as backend (Flask, OpenAPI, Pydantic). Finally during my time at Agricool S.A.S, I oversaw development and operation of production systems bridging cloud and embedded environments. My responsibilities included designing secure Linux network topologies, automating deployments, and maintaining robust monitoring and alerting using (Prometheus, Grafana), and secret management. Earlier, my work at Thales Communications & Security grounded me deeply in Linux systems administration, networking, and high-reliability software engineering, including work on security-critical communication systems.

My technical foundation includes:
• Linux systems & networking: 10+ years of hands-on experience, from embedded to cloud scale.
• Cloud & on-prem infrastructures: AWS, Hyper-V, Debian, Ubuntu.
• Automation & CI/CD: Ansible, Terraform, GitHub Actions.
• Containerization: Docker, Docker Compose, AWS ECS.
• Programming: Python, Bash, Go, C/C++.
• Observability: Prometheus, Grafana, centralized logging.

I thrive in autonomous and remote environments, having led distributed teams across Europe, defining best practices, mentoring engineers, and ensuring operational excellence under agile frameworks. My background—spanning cloud operations, infrastructure as code, and secure systems engineering—enables me to deliver both the reliability and velocity that modern platforms require.

I would welcome the opportunity to bring this blend of technical depth and systems thinking to your team.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert

Language

Greek, Modern
Fluent
French
Advanced
English
Fluent
Spanish; Castilian
Advanced

Work Experience

Software Engineering at Freelance (Clients in banking and insurance services)
December 1, 2024 - November 10, 2025
Implement a secure network infrastructure and services following ANSSI’s reference PAMS for multitenant network segregation. Technologies include HyperV, Stormshield, Ansible, Debian, Gitlab, and Squid.
Software Engineering Team Lead at Harvest - AI GmbH
November 1, 2024 - November 1, 2024
Architected and engineered a SaaS platform delivering yield prediction for greenhouse operations. Led infrastructure design, API design, CI/CD, code reviews, established processes and best practices, and cultivated a high‑performance team; aligned technology with product objectives; managed budget/resource planning.
Software Engineering Team Lead at Agricool S.A.S
November 1, 2022 - November 1, 2022
Interfaced hardware and software teams to ensure project delivery; conducted code reviews; developed and maintained system, API and embedded code; designed and implemented network architecture (SCADA, IIoT). Led agile practices, roadmaps, and budgeting; software stack included AWS, Debian, Docker, Golang, Ansible, Protobuf, Prometheus, Grafana, Github, Envoy, and Tailscale; embedded stack included C, C++, ARM Mbed OS, PlatformIO, MODBUS, WAGO 750, PFC200.
Linux System Developer at Thales Communications & Security
June 1, 2018 - June 1, 2018
Porting, integration and testing for security‑related communication network software; developed industrial software processes; contributed to national/EU projects (FP7, H2020) on drones, critical infrastructure surveillance, HPC, and sensor networks; embedded Linux on ARM Cortex‑A8/A9; OSes included Debian, Sysgo ELinOS, OpenWRT, U‑Boot; software such as Strongswan, WPA supplicant, Syslog-ng, OpenSC; hardware including ARM Cortex‑A9, NEON, Xilinx Virtex‑7, Kalray.

Education

PhD CIFRE at Thales Communications & Security with Université Paris Est (UPEM)
September 1, 2013 - December 1, 2017
Master 2 in Embedded Systems Engineering at Paris School of Engineering (ECE)
September 1, 2009 - September 1, 2011
Master 1 in Electronic Computer Systems Engineering at Technological Education Institute of Piraeus (TEI), Athens, Greece
March 1, 2002 - February 1, 2009

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services, Manufacturing, Agriculture & Mining