Backend & Software Architecture

Most software problems that slow a company down are not visible on the screen. They live in the backend: tangled business logic, endpoints nobody dares to touch, slow queries, and releases that feel like a gamble. With more than 15 years of experience and 100+ projects behind me, I help companies design backends that stay fast, understandable and easy to change as the product grows.

Architecture That Makes Change Safe

Good architecture is less about fashionable patterns and more about putting boundaries in the right places. I use Clean Architecture and Domain-Driven Design to keep business rules independent of frameworks and infrastructure, backed by automated tests that enforce those boundaries.

The clearest example is Tarlamapp, the AI-driven multi-tenant AgriTech SaaS I founded and develop at Teknopark İzmir as part of a TÜBİTAK programme. Its framework-independent core is covered by 655 tests with machine-enforced layer boundaries, so new features such as plan-based limits, growth tracking or WhatsApp alerts can be added without destabilising the rest of the system.

APIs, Queues and Caching at Scale

A backend has to serve many clients reliably: web apps, mobile apps, admin panels and third-party integrations. My typical toolkit includes:

• REST APIs with token authentication, versioning and OpenAPI documentation
• RabbitMQ queues and workers for background jobs and integrations
• Redis caching in front of PostgreSQL or MySQL
• Meilisearch or Elasticsearch for fast search
• Docker, Nginx and GitHub Actions for repeatable CI/CD

For 212 Stüdyo, an enterprise platform on Laravel and PostgreSQL, RabbitMQ handles background work and Redis sits in front of the database. For OneBill in Ireland, an energy cost platform, customer bills are read, tariffs extracted and compared against the whole market, with daily re-checks running in the background. Extracım, a staffing marketplace, runs its web app, a 160+ endpoint mobile API and its admin back office from a single, well-structured Laravel codebase.

Microservices, When They Make Sense

Microservices can solve real scaling and team problems, but they also add operational complexity. I help you decide honestly: often a well-structured modular monolith is the right first step, with services split out where independent scaling, deployment or ownership genuinely pays off.

Code Audits, Refactoring and Fractional CTO Support

If you already have a system that is becoming hard to maintain, I start with a code audit: architecture, data model, security, performance, tests and deployment. You get a prioritised, practical plan, and I can then refactor legacy code step by step rather than betting on a risky full rewrite.

For startups and growing companies that need senior technical leadership but are not ready for a full-time hire, I also work as a fractional CTO, drawing on my current CTO role and years as a senior software architect. That covers architecture decisions, code reviews, roadmap planning and supporting your developers.

Based in Izmir, I work with companies across Türkiye and abroad. If your backend needs a solid foundation or a second opinion, tell me about your system and I will suggest the right next step and prepare a quote.