Technical Lead | Software Development Manager | Platform Architecture & Secure SDLC
I help engineering teams design, build, modernize, and operate scalable software platforms.
My work focuses on platform architecture, technical governance, secure SDLC, cloud-native infrastructure, observability, API design, and engineering leadership. I have worked across enterprise-grade systems involving microservices, multi-tenant SaaS architectures, e-commerce platforms, marketplace ecosystems, logistics platforms, financial workflows, and high-availability backend systems.
I care about building software systems that are not only functional, but also maintainable, observable, secure, and understandable by both technical and non-technical stakeholders.
- Microservices architecture
- Multi-tenant SaaS architecture
- API-first system design
- Legacy modernization
- Engineering standards and technical decision-making
- SDLC improvement and delivery governance
- Kubernetes, Docker, Helm
- Azure, AWS, Huawei Cloud
- CI/CD pipelines with Azure DevOps, Github Actions and GitLab
- Prometheus, Grafana, Loki, Tempo
- Elasticsearch, Sentry, centralized logging
- Infrastructure monitoring and reliability practices
- Secure SDLC
- ISO/IEC 27001:2022 readiness
- IAM, RBAC, MFA, access governance
- SAST / DAST processes
- SIEM-oriented logging and auditability
- Vulnerability management and remediation workflows
- Engineering team leadership
- Technical mentoring
- Agile / Scrum process improvement
- QA automation strategy
- Cross-functional work with product, project, and business teams
- Technical pre-sales, vendor evaluation, and architecture review
- Agentic AI workflows
- LLM orchestration
- AutoGen, n8n, workflow automation
- AI-supported documentation, analysis, and SDLC operations
| Area | Technologies |
|---|---|
| Backend | .NET / .NET Core, Node.js, Python, Java |
| Frontend | React, Next.js, TypeScript |
| Architecture | Microservices, API Design, Multi-tenant SaaS |
| Cloud & DevOps | Kubernetes, Docker, Helm, Azure, AWS, Huawei Cloud |
| CI/CD | Azure DevOps, GitLab CI/CD, Github Actions |
| Observability | Prometheus, Grafana, Loki, Tempo, Elasticsearch, Sentry |
| Data & Messaging | MS SQL Server, PostgreSQL, MongoDB, Redis, RabbitMQ |
| Security | Secure SDLC, ISO 27001, IAM, SIEM, SAST/DAST |
| Automation | Selenium, Cucumber, BDD, n8n, AutoGen |
I write about software engineering, API design, process modeling, and engineering principles on Medium.
Selected articles:
- RESTful API Tasarım Kılavuzu
- Kanlı Canlı - Kütür Kütür SOLID Prensipleri
- Business Process Model and Notation (BPMN)
- BPMN’e Giriş - Temel BPMN Nesneleri
I approach engineering as a balance between architecture, delivery, security, and communication.
Good software is shaped by code quality, system boundaries, operational visibility, clear ownership, and the ability of teams to understand and evolve the system over time.
My background in Visual Communication and Design also helps me approach technical topics with attention to clarity, structure, hierarchy, architecture diagrams, process models, documentation, and stakeholder communication.
- LinkedIn: linkedin.com/in/hakan-seysane
- Medium: seysane.medium.com
- Location: Istanbul, Turkey
⚡ Fun fact: I like complex systems, whether they are software platforms, musical arrangements, business processes, or mountain routes.
I play drums, produce metal music, write about software engineering, enjoy visual thinking, and spend time on mountain trails, climbing routes, and under the night sky.