Kaan Yagci

Technical reference for platform engineering, DevOps, SRE, cloud architecture and security in a lean healthcare technology team. - Own cloud infrastructure, CI/CD, production operations, release management and technical compliance aligned with ISO 27001, HDS and SOC 2 Type II. - Migrated self-hosted GitLab CE to GitHub, including GitLab CI/CD to GitHub Actions. - Reworked delivery workflows for reproducibility, traceability, immutable releases and secure delivery. - Raised Docker Scout scores from F to A/B; implemented DAST, vulnerability tracking, monitoring and remediation. - Remediated cloud architecture with network isolation, environment separation, access controls, Terraform and auditability. - Designed and deployed infrastructure for AI and agentic AI; served as sole production on-call engineer. - Implemented ZTNA with OpenVPN CloudConnexa. Stack: GitHub Actions, GitLab CI/CD, Docker, Docker Scout, Terraform, Kubernetes, OpenVPN CloudConnexa, DAST, Linux, monitoring, healthcare compliance.

Co-founder and technical owner for an early-stage, bootstrapped fashion technology product. - Own architecture, platform foundation, infrastructure, cloud provider selection and deployment strategy. - Set up deployment workflows and production-readiness processes supporting product development and launch. - Implemented data anonymization and GDPR-focused technical controls for privacy-sensitive data. - Balance delivery speed, maintainability, cost and operational risk as a co-founder. Stack: Go, Python, TypeScript, Kubernetes, GitHub Actions, Docker, Helm, Playwright, Keycloak, ClickHouse, Neo4j, PostgreSQL, Azure, Envoy, Nginx, Apache Solr, KeyDB.

Co-founder and operator of a consulting and product studio focused on software engineering, platform/DevOps, cloud infrastructure and technical advisory. - Deliver web, mobile, backend and platform systems from requirements and architecture through implementation, deployment and production operations. - Advise clients on architecture, DevOps, deployment strategy, production readiness and secure software development. - Contribute to product strategy, technical direction and new initiatives as a shareholder and operator. - Build and validate internal products, developer tooling and AI-assisted engineering workflows. Stack: Go, TypeScript, Python, Java, Spring Boot, Flutter, Web Components, Docker, Kubernetes, Docker Compose, AWS, GCP, Azure, PostgreSQL, Neo4j.

Senior Go engineer building secure, high-performance data-processing systems for sensitive data. - Built concurrent processing logic to handle large workloads efficiently and predictably. - Implemented domain-specific algorithms with limited external dependencies where performance, control and maintainability mattered. - Worked across Neo4j, PostgreSQL, MySQL and MSSQL data models for graph and data-management use cases. - Improved maintainability, performance and production readiness of core backend components. Stack: Go, Python, Docker SDK, WebAssembly, GitHub Actions, Docker, AWS, Scaleway, PostgreSQL, MySQL, MSSQL, Neo4j.

Contracted to support Owkin Substra after a team reorganization, focusing on Go orchestration and Kubernetes workload security. - Maintained and evolved the Go orchestration layer used by Substra. - Migrated Kubernetes security controls from Pod Security Policies to the Pod Security Admission restricted profile. - Refactored orchestrator and runtime code across teams to make workloads compatible with restricted security constraints. - Secured Jupyter Notebook workflows for Abstra through a controlled forward-proxy architecture. - Balanced security requirements, Kubernetes constraints and team ownership boundaries for long-term maintainability. Stack: Go, Python, Kubernetes, GitHub Actions, Django, Celery, Helm, Skaffold, mitmproxy, PostgreSQL.

Developed and maintained full-stack GIS software for advanced spatial-data analysis and visualization. - Built Java/Spring Boot REST APIs, internal tooling and performance-focused data-analysis modules. - Contributed to modular, testable front-end architecture with Web Components and TypeScript. - Co-developed an internal Java and Vue.js code-review platform that improved developer feedback cycles. - Worked across PostgreSQL, MSSQL and MySQL integrations. Stack: Java, TypeScript, Spring Boot, Web Components, Python, Vue.js, Node.js, Jenkins, Docker, GitLab, PostgreSQL, MSSQL, MySQL.

Led backend, mobile and cloud infrastructure delivery for an in-store optometry and retail platform enabling prescription glasses within 30 minutes. - Built and maintained retail and optometry backends plus clinic-facing Flutter applications. - Connected a Flutter app to Stripe Terminal devices for contactless in-store payments. - Architected automated end-to-end testing on EC2 macOS, reducing QA time from a full day to about one hour. - Led AWS and MedStack infrastructure setup for HIPAA and GDPR compliance. Stack: Go, Python, Flutter, Stripe, Docker, EC2 macOS, CircleCI, AWS, MedStack, Azure, Flask, Raspberry Pi, Loki, Prometheus, Grafana, PostgreSQL, MySQL.

Co-founded and led engineering for a community platform helping international students publish stories, share content and communicate in real time. - Built the web publishing platform and real-time chat experience. - Developed a live video re-streaming system with Go and ffmpeg to broadcast Instagram Live sessions to multiple social platforms. - Solved stream adaptation, reliability and multi-destination delivery challenges. Stack: Go, ffmpeg, Angular, GCP, PostgreSQL, TypeScript, Java, Python, Node.js.

Contributed to Samsung Bixby and led French localization for core modules and native applications including Calculator and Samsung Health. - Developed French third-party integrations for RATP, JeuxVideo.com, Marmiton, Uber and Yelp. - Designed a Nearley.js preprocessing pipeline for intent handling that was adopted across 11 international localization teams. - Built automation and end-to-end testing tools spanning ASR-to-TTS feedback cycles. Stack: JavaScript, Python, Java, Nearley.js, Node.js, React, GCP, AWS, TeamCity, Datadog, PostgreSQL.

Founded and built a hyper-local alcohol-delivery platform covering the complete ordering, inventory and courier workflow. - Developed the Node.js and AngularJS service for SMS-based ordering. - Integrated the Twilio API and built a regex-based natural-language intent parser for orders. - Operated inventory and courier workflows alongside product and technical delivery. Stack: JavaScript, Twilio API, AngularJS, Node.js, MySQL.