26.10.2026 aktualisiert

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Experienced Software & AI Engineer/Architect

Miehlen, Deutschland
Nur Remote
Master's in Computer Science; Data Scientist (02/2025); MLOps Engineer (01/2026)
Miehlen, Deutschland
Nur Remote
Master's in Computer Science; Data Scientist (02/2025); MLOps Engineer (01/2026)

Profilanlagen

2026-10-Papoutsis-Resume.pdf

Über mich

A passionate, open minded and versatile allrounder around software engineering, architecture, and development with a deep commitment to crafting pragmatic, high-quality solutions for complex challenges.

Skills

OAuth 2.0KeycloakAI AgentsGitHub CopilotGitHub ActionsMLflowHelmTrivyJavaJavaScript.Net FrameworkApache ActivemqKünstliche IntelligenzData AnalysisSystems EngineeringTest AutomationUnit TestingMicrosoft AzureBash ShellBehavior Driven DevelopmentC#C++Cloud ComputingCloud-EngineeringDatenbankenContinuous DeliveryContinuous IntegrationDatenbank DesignLinuxDevOpsDistributed ComputingElasticsearchPerlGitHubProtocol BuffersIdentitätsmanagementBildverarbeitungJSONPythonPostgreSQLMachine LearningNumPySoftware ArchitectureQt (Software)QualitätsmanagementRedisAnsibleTensorFlowPrometheusRequirements EngineeringRobot FrameworkSoftwareentwicklungSoftware SystemsSolution ArchitectureSQLiteSystemarchitekturSystem DesignIntegration (Software)TeststrategieTypeScriptVirtualizationOpenapiPulumiTestenGoogle CloudErlangTest-Driven DevelopmentData ScienceEvent-driven ArchitectureDocker SwarmLarge Language ModelsGrafanaPrompt EngineeringSafety Critical SystemsCypressZuverlässigkeit der SystemeVue.jsKerasGitpandasGitlab-CiScikit-learnIntegrationstestsKubernetesPlaywrightApache KafkaGraphQLMachine Learning OperationsApi DesignRestful ApisSicherheitsbestimmungenTerraformCucumber (Software)Administration von DatenbankenDockerElixirJenkinsGolangProgramming LanguagesMicroservices
Software Engineering & Architecture
Independent software engineer and systems architect with 20+ years of experience in complex, distributed and safety-critical systems. Go/Golang, C/C++, C#, Python, JavaScript/TypeScript, Java, Bash, Perl and Elixir/Erlang. Event-Driven Architecture (EDA), microservices, cloud-native applications, Vue.js, Qt, .NET and Quarkus. Requirements engineering, documentation as code, technical coaching and mentoring.

Cloud & DevOps
Kubernetes, Docker/Swarm, Docker Compose, Helm/Helmfile, Linux, Pulumi, Ansible and Terraform. Google Cloud, Microsoft Azure and Hetzner. Infrastructure as Code, GitOps, Continuous Delivery and CI/CD with GitLab CI/CD, GitHub Actions and Jenkins. Cloud transformation and enterprise application development at Schwarz Digits.

AI & Agentic Engineering
LLM APIs, prompt engineering, AI agents and orchestration, multi-model workflows, specification-driven development and AI-assisted code review. OpenCode, Codex, Herdr and GitHub Copilot. Built a ticket- and pull-request-driven AI Agent Factory with isolated environments, automated reviews, CI validation and quality gates. Developed Refentra, an AI-powered pharmaceutical evidence-matching and reference-pack platform with human-in-the-loop review and annotated PDF generation.

Data Science & MLOps
Data Scientist certification (Feb 2025) and MLOps Engineer certification (Jan 2026), DataScientest / Université Paris 1 Panthéon-Sorbonne. Pandas/GeoPandas, NumPy, Scikit-learn, TensorFlow/Keras, OpenCV, image processing, NLP and reinforcement learning. End-to-end weather forecasting MLOps pipeline: DVC, MLflow, BentoML, MinIO/S3, Docker, Prometheus and Grafana; reproducible training, model versioning, deployment and monitoring.

Data, APIs & Messaging
PostgreSQL, Redis, SQLite and MinIO/S3. REST APIs, OpenAPI, GraphQL, Microsoft Graph API, Protobuf and JSON. Kafka, ActiveMQ and NATS. Distributed systems and cloud migration of legacy ATC applications.

Testing & Quality
TDD/BDD, test engineering, quality assurance, unit/integration and end-to-end testing. Playwright, Cypress, Cucumber, Robot Framework and Godog. Automated testing and reliable delivery for air traffic management and cloud-native IAM systems.

Security & Observability
Keycloak, Dex, OAuth 2.0/OIDC, IAM and Microsoft Information Protection (MIP). Container hardening, CVE scanning, SBOM/VEX and image attestations; Trivy, DependencyTrack, OPA/Rego and dtapac. Prometheus, Grafana and Elastic Stack.

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2024

Sprachen

DeutschMutterspracheEnglischverhandlungssicherGriechischMuttersprache

Projekthistorie

Software Engineer / Technical Coach - Cloud-Native Enterprise Applications

Schwarz Digits
Supporting the enterprise-wide transition from Microsoft Azure to Google Cloud through cloud-native application development and technical coaching.

- Designed and developed cloud-native enterprise applications.
- Coached and mentored developers transitioning from low-code platforms to Go, Vue.js and modern software engineering practices.
- Co-developed a Shared Mailbox Management solution for mailbox administration and lifecycle management.
- Implemented a self-service application using C# and .NET for decrypting documents protected by Microsoft Information Protection (MIP).
- Developed a License Exception Self-Service platform with automated workflows for enterprise-wide Microsoft license management.
- Designed and maintained containerized services and Kubernetes infrastructure using Infrastructure as Code and modern authentication/authorization.
- Applied AI-assisted and agentic engineering workflows to development and maintenance.

Tooling: Go/Golang, C#, .NET, Vue.js, JavaScript, Google Cloud, Microsoft Azure, Kubernetes, Docker, Pulumi, PostgreSQL, S3, OpenAPI, Microsoft Graph API, Dex, OAuth 2.0, IAM, MIP, Git, OpenCode.

Software Architect / Full-Stack & Agentic AI Engineer

Refentra
Designed and developed Refentra, an AI-powered platform for the pharmaceutical industry that automates scientific evidence matching and reference-pack preparation for Medical, Legal and Regulatory (MLR) review.

- Designed the cloud-native full-stack architecture, backend services, frontend, persistence, authentication and document processing.
- Implemented LLM-powered claim extraction, scientific evidence matching and claim-to-evidence assessment.
- Built human-in-the-loop review workflows and generation of annotated PDFs and traceable reference packs.
- Developed a ticket- and pull-request-driven AI Agent Factory with specialized coding agents, isolated development environments, automated reviews, CI validation and quality gates.
- Orchestrated multiple LLMs for requirements analysis, specification, planning, implementation and code review, with automated testing and human architectural oversight.

Tooling: Go/Golang, Vue.js, JavaScript, PostgreSQL, Docker/Compose, MinIO/S3, Hetzner, Keycloak, OAuth 2.0, LLM APIs, prompt engineering, PDF processing, Herdr, OpenCode, Codex, specification-driven development.

Independent Software Engineer & Consultant (Freelancer)

dnp :: systems & software engineering
Independent software engineering and consultancy since March 2024. Hands-on software architecture, cloud-native and distributed systems, DevOps/Continuous Delivery, Data Science and MLOps. More recently focused on agentic engineering: AI-assisted development workflows, autonomous coding agents, specification-driven development and automated code review. Technical coaching and mentoring alongside implementation.

Selected engagements: DFS Aviation Services, Univention, Schwarz Digits and Refentra. Core technologies include Go/Golang, C/C++, Python, Vue.js, Kubernetes, Docker, Google Cloud, Azure and PostgreSQL.

Technical Consultant / Software Engineering ANSPs

DFS Aviation Services
Software engineering and technical consulting for DFS Aviation Services and international air navigation service providers. Applied Event-Driven Architecture (EDA) with Kafka and ActiveMQ.

- Automated IT infrastructure and CI/CD pipelines with security/CVE scanning.
- Modernized a legacy C++ ATM system into scalable Go/Python microservices with cloud deployment.
- Advised on software/system architecture, DevOps and Continuous Delivery.
- Delivered critical features and resolved high-priority incidents for DANS (Dubai), LVNL (Netherlands), ENAV (Italy) and Kazaeronavigatsia (Kazakhstan).
- Applied Data Science to operational data and supported build-server and GitOps setup.

Tooling: Go/Golang, C++, Python, Bash, Linux, PostgreSQL, SQLite, GitLab CI, VMware, Linux KVM, Docker/Swarm, Kubernetes, Kafka, ActiveMQ, Git, Ansible, REST/OpenAPI, Protobuf, JSON, Jira, Godog, Robot Framework, Asciidoctor, Qt and Trivy.

MLOps Engineer - End-to-End Weather Forecasting Pipeline (Study Project)

DataScientest / Université Paris 1 Panthéon-Sorbonne
Completed MLOps Engineer certification in January 2026. Designed and implemented an end-to-end MLOps pipeline for a machine learning-based weather forecasting application.

- Automated data preparation, model training, evaluation, deployment, monitoring and retraining.
- Implemented data and model versioning with DVC for reproducibility and traceability.
- Integrated MLflow for experiment tracking, model evaluation and model registry.
- Containerized models and deployed inference services with BentoML and Docker.
- Implemented model and service monitoring with Prometheus and Grafana.
- Automated pipeline execution and infrastructure setup.

Tooling: Python, Bash, GitHub, Docker, Docker Compose, DVC, Pandas, NumPy, MLflow, MinIO/S3, BentoML, REST APIs, Prometheus, Grafana, Scikit-learn.

Cloud Native/DevOps Engineer IAM

Univention

Internet und Informationstechnologie

Enhanced Univention’s cloud-native IAM platform Nubus. Event-Driven Architecture (EDA) with NATS.

- Refactored and secured Kubernetes Helm charts, introduced non-root containers, improved secrets management and integrated 2FA via Keycloak.
- Implemented Go Kubernetes webhooks for Cert-Manager and External-DNS to automate certificates and DNS synchronization.
- Automated GitLab CI/CD with Renovate, Helm testing and E2E validation.
- Evaluated Gardener and GitLab Runner migration to improve scalability and deployment reliability.
- Resolved OIDC backchannel logout and NATS subscription issues in distributed IAM services.
- Implemented E2E tests and Vue.js UI enhancements.
- Integrated security scanning, vulnerability triage, SBOM/VEX and release image attestations.
- Applied AI-assisted and agentic engineering workflows to development and maintenance.

Tooling: Go, Python, Bash, Kubernetes, Helm, Docker, GitLab CI/CD, Linux, Keycloak, Cert-Manager, External-DNS, Renovate, Prometheus, Grafana, LDAP, Vue.js, DependencyTrack, OPA/Rego, Trivy, dtapac, PostgreSQL, NATS, Playwright, Cypress, REST/OpenAPI, Git, GitHub Copilot, OpenCode.

Data Scientist - Illegal Construction Detection in Satellite Images (Study Project)

DataScientest / Université Paris 1 Panthéon-Sorbonne
Completed Data Scientist certification in February 2025. Hands-on study project: detecting illegal constructions in satellite images using deep learning and image processing.

- Established collaboration infrastructure for a distributed team with Google Colab, Drive and GitHub.
- Analyzed satellite data and prepared training and validation datasets.
- Designed, evaluated and trained multiple deep learning architectures.
- Developed post-processing pipelines to improve model predictions.

Tooling: Python, Bash, GitHub, GitHub Actions, Google Colab, NumPy, Pandas, GeoPandas, Scikit-learn, Matplotlib, Folium, Seaborn, OpenCV, Scikit-image, Keras and TensorFlow. Training also covered NLP and reinforcement learning.

CTO - Chief Technology Officer

Lhotse Analytics GmbH
Led technology strategy and hands-on development for ivoflow, an AI-powered procurement intelligence platform for manufacturing companies.

- Served as Software Engineering Team Lead, Product Owner and Software Architect.
- Established Continuous Delivery and DevOps practices, end-to-end testing and Infrastructure as Code.
- Contributed to ISO 27001 compliance and improved security and reliability.
- Analyzed and improved software architecture for scalability and maintainability.

Tooling: Go/Golang, Elixir, Ember.js, Bash, Microsoft Azure/AKS, PostgreSQL, GitHub Actions, Kubernetes, Ansible, Terraform, GraphQL, REST, JSON, Jira, Cypress and Asciidoctor.

Senior Software & Systems Engineering

DFS Deutsche Flugsicherung GmbH
Developed and modernized safety-critical air traffic control systems at DFS Deutsche Flugsicherung. Applied Event-Driven Architecture (EDA) across cloud-ready ATC systems, the Spacing Assistant and air/ground tracking systems.

2019-2023: Cloud-ready ATC systems. Migrated legacy C++ systems to Go/Python microservices and Kubernetes; established GitLab Continuous Delivery, automated regulatory processes and testing, and coached colleagues in cloud technologies. Roles included hands-on cloud-native developer, system architect and Product Owner.

2018-2019: Spacing Assistant (minimum separation on approach). Lead Developer and Systems Architect; Go/Java microservices, automated testing and Continuous Delivery.

2012-2018: Air/ground tracking, alerting, tracker analysis and flight-plan/track correlation. Developed correlator and monitoring functionality, automated tests, configuration CLI and Wireshark dissectors. Requirements analysis, architecture documentation, factory/site acceptance testing and customer developer training.

Tooling: C/C++, Go, Python, Java, Perl, Linux, Azure, Kubernetes, Docker/Swarm, Kafka, ActiveMQ, PostgreSQL, Redis, SQLite, Oracle, GitLab, Jenkins, Helm, Ansible, Terraform, Elastic Stack, Prometheus, Qt, OpenAPI, Protobuf, Robot Framework, Godog/BDD, Cypress and Asciidoctor.

Software Engineer / Technical Consultant

RV Realtime Visions GmbH
Software engineering and technical consulting across air traffic control, telecommunications and medical technology. Applied Event-Driven Architecture (EDA) in ATC simulators, AFTN messaging and LVNL touch-input contingency systems.

- Developed ATC simulators and a programmable electronic flight-strip interface simulator with embedded Python.
- Developed AFTN/ICAO messaging, redundant server processes and Qt clients, including customer acceptance testing.
- Built configurable touch-input contingency interfaces and custom device drivers for LVNL/Schiphol.
- Implemented high-throughput ASN.1 converters for ETSI-compliant lawful interception at Arcor.
- Developed footprint detection, a treadmill-controlled 3D game and rehabilitation applications for zebris Medical. Supervised a thesis on tooth segmentation/classification from 3D point clouds.

Tooling: C/C++, Qt, Python, C#/.NET, OpenCV, Ogre3D, Linux, SQL/Oracle/SQLite, SVN, ASN.1 and AFTN/ICAO protocols.

Student Assistant

Institute of Computer Science (Realtime Systems)
Assisted in research and development projects related to real-time systems.

Web Developer (Student Job)

MS Visucom
Developed web applications and websites as a student job.

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